model_shared.c

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/*
Copyright (C) 1996-1997 Id Software, Inc.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
// models.c -- model loading and caching
 
// models are the only shared resource between a client and server running
// on the same machine.
 
#include "quakedef.h"
#include "image.h"
#include "r_shadow.h"
#include "polygon.h"
 
cvar_t r_mipskins = {CF_CLIENT | CF_ARCHIVE, "r_mipskins", "0", "mipmaps model skins so they render faster in the distance and do not display noise artifacts, can cause discoloration of skins if they contain undesirable border colors"};
cvar_t r_mipnormalmaps = {CF_CLIENT | CF_ARCHIVE, "r_mipnormalmaps", "1", "mipmaps normalmaps (turning it off looks sharper but may have aliasing)"};
cvar_t mod_generatelightmaps_unitspersample = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_unitspersample", "8", "lightmap resolution"};
cvar_t mod_generatelightmaps_borderpixels = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_borderpixels", "2", "extra space around polygons to prevent sampling artifacts"};
cvar_t mod_generatelightmaps_texturesize = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_texturesize", "1024", "size of lightmap textures"};
cvar_t mod_generatelightmaps_lightmapsamples = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_lightmapsamples", "16", "number of shadow tests done per lightmap pixel"};
cvar_t mod_generatelightmaps_vertexsamples = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_vertexsamples", "16", "number of shadow tests done per vertex"};
cvar_t mod_generatelightmaps_gridsamples = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_gridsamples", "64", "number of shadow tests done per lightgrid cell"};
cvar_t mod_generatelightmaps_lightmapradius = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_lightmapradius", "16", "sampling area around each lightmap pixel"};
cvar_t mod_generatelightmaps_vertexradius = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_vertexradius", "16", "sampling area around each vertex"};
cvar_t mod_generatelightmaps_gridradius = {CF_CLIENT | CF_ARCHIVE, "mod_generatelightmaps_gridradius", "64", "sampling area around each lightgrid cell center"};
 
model_t *loadmodel;
 
// Supported model formats
static modloader_t loader[] =
{
    {"obj", NULL, 0, Mod_OBJ_Load},
    {NULL, "IDPO", 4, Mod_IDP0_Load},
    {NULL, "IDP2", 4, Mod_IDP2_Load},
    {NULL, "IDP3", 4, Mod_IDP3_Load},
    {NULL, "IDSP", 4, Mod_IDSP_Load},
    {NULL, "IDS2", 4, Mod_IDS2_Load},
    {NULL, "\035", 1, Mod_Q1BSP_Load},
    {NULL, "\036", 1, Mod_HLBSP_Load},
    {NULL, "BSP2", 4, Mod_BSP2_Load},
    {NULL, "2PSB", 4, Mod_2PSB_Load},
    {NULL, "IBSP", 4, Mod_IBSP_Load},
    {NULL, "VBSP", 4, Mod_VBSP_Load},
    {NULL, "ZYMOTICMODEL", 13, Mod_ZYMOTICMODEL_Load},
    {NULL, "DARKPLACESMODEL", 16, Mod_DARKPLACESMODEL_Load},
    {NULL, "PSKMODEL", 9, Mod_PSKMODEL_Load},
    {NULL, "INTERQUAKEMODEL", 16, Mod_INTERQUAKEMODEL_Load},
    {"map", NULL, 0, Mod_MAP_Load},
    {NULL, NULL, 0, NULL}
};
 
static mempool_t *mod_mempool;
static memexpandablearray_t models;
 
static mempool_t* q3shaders_mem;
typedef struct q3shader_hash_entry_s
{
  shader_t shader;
  struct q3shader_hash_entry_s* chain;
} q3shader_hash_entry_t;
#define Q3SHADER_HASH_SIZE  1021
typedef struct q3shader_data_s
{
  memexpandablearray_t hash_entries;
  q3shader_hash_entry_t hash[Q3SHADER_HASH_SIZE];
  memexpandablearray_t char_ptrs;
} q3shader_data_t;
static q3shader_data_t* q3shader_data;
 
static void mod_start(void)
{
    int i, count;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
 
    SCR_PushLoadingScreen("Loading models", 1.0);
    count = 0;
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*')
            if (mod->used)
                ++count;
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*')
            if (mod->used)
            {
                SCR_PushLoadingScreen(mod->name, 1.0 / count);
                Mod_LoadModel(mod, true, false);
                SCR_PopLoadingScreen(false);
            }
    SCR_PopLoadingScreen(false);
}
 
static void mod_shutdown(void)
{
    int i;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
 
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && (mod->loaded || mod->mempool))
            Mod_UnloadModel(mod);
 
    Mod_FreeQ3Shaders();
    Mod_Skeletal_FreeBuffers();
}
 
static void mod_newmap(void)
{
    msurface_t *surface;
    int i, j, k, l, surfacenum, ssize, tsize;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
 
    for (i = 0;i < nummodels;i++)
    {
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->mempool)
        {
            for (j = 0;j < mod->num_textures && mod->data_textures;j++)
            {
                // note that materialshaderpass and backgroundshaderpass point to shaderpasses[] and so do the pre/post shader ranges, so this catches all of them...
                for (l = 0; l < Q3SHADER_MAXLAYERS; l++)
                    if (mod->data_textures[j].shaderpasses[l])
                        for (k = 0; k < mod->data_textures[j].shaderpasses[l]->numframes; k++)
                            R_SkinFrame_MarkUsed(mod->data_textures[j].shaderpasses[l]->skinframes[k]);
            }
            if (mod->brush.solidskyskinframe)
                R_SkinFrame_MarkUsed(mod->brush.solidskyskinframe);
            if (mod->brush.alphaskyskinframe)
                R_SkinFrame_MarkUsed(mod->brush.alphaskyskinframe);
        }
    }
 
    if (!cl_stainmaps_clearonload.integer)
        return;
 
    for (i = 0;i < nummodels;i++)
    {
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->mempool && mod->data_surfaces)
        {
            for (surfacenum = 0, surface = mod->data_surfaces;surfacenum < mod->num_surfaces;surfacenum++, surface++)
            {
                if (surface->lightmapinfo && surface->lightmapinfo->stainsamples)
                {
                    ssize = (surface->lightmapinfo->extents[0] >> 4) + 1;
                    tsize = (surface->lightmapinfo->extents[1] >> 4) + 1;
                    memset(surface->lightmapinfo->stainsamples, 255, ssize * tsize * 3);
                    mod->brushq1.lightmapupdateflags[surfacenum] = true;
                }
            }
        }
    }
}
 
/*
===============
Mod_Init
===============
*/
static void Mod_Print_f(cmd_state_t *cmd);
static void Mod_Precache_f(cmd_state_t *cmd);
static void Mod_Decompile_f(cmd_state_t *cmd);
static void Mod_GenerateLightmaps_f(cmd_state_t *cmd);
void Mod_Init (void)
{
    mod_mempool = Mem_AllocPool("modelinfo", 0, NULL);
    Mem_ExpandableArray_NewArray(&models, mod_mempool, sizeof(model_t), 16);
 
    Mod_BrushInit();
    Mod_AliasInit();
    Mod_SpriteInit();
 
    Cvar_RegisterVariable(&r_mipskins);
    Cvar_RegisterVariable(&r_mipnormalmaps);
    Cvar_RegisterVariable(&mod_generatelightmaps_unitspersample);
    Cvar_RegisterVariable(&mod_generatelightmaps_borderpixels);
    Cvar_RegisterVariable(&mod_generatelightmaps_texturesize);
 
    Cvar_RegisterVariable(&mod_generatelightmaps_lightmapsamples);
    Cvar_RegisterVariable(&mod_generatelightmaps_vertexsamples);
    Cvar_RegisterVariable(&mod_generatelightmaps_gridsamples);
    Cvar_RegisterVariable(&mod_generatelightmaps_lightmapradius);
    Cvar_RegisterVariable(&mod_generatelightmaps_vertexradius);
    Cvar_RegisterVariable(&mod_generatelightmaps_gridradius);
 
    Cmd_AddCommand(CF_CLIENT, "modellist", Mod_Print_f, "prints a list of loaded models");
    Cmd_AddCommand(CF_CLIENT, "modelprecache", Mod_Precache_f, "load a model");
    Cmd_AddCommand(CF_CLIENT, "modeldecompile", Mod_Decompile_f, "exports a model in several formats for editing purposes");
    Cmd_AddCommand(CF_CLIENT, "mod_generatelightmaps", Mod_GenerateLightmaps_f, "rebuilds lighting on current worldmodel");
}
 
void Mod_RenderInit(void)
{
    R_RegisterModule("Models", mod_start, mod_shutdown, mod_newmap, NULL, NULL);
}
 
void Mod_UnloadModel (model_t *mod)
{
    char name[MAX_QPATH];
    qbool used;
    model_t *parentmodel;
 
    if (developer_loading.integer)
        Con_Printf("unloading model %s\n", mod->name);
 
    dp_strlcpy(name, mod->name, sizeof(name));
    parentmodel = mod->brush.parentmodel;
    used = mod->used;
    if (mod->mempool)
    {
        if (mod->surfmesh.data_element3i_indexbuffer && !mod->surfmesh.data_element3i_indexbuffer->isdynamic)
            R_Mesh_DestroyMeshBuffer(mod->surfmesh.data_element3i_indexbuffer);
        mod->surfmesh.data_element3i_indexbuffer = NULL;
        if (mod->surfmesh.data_element3s_indexbuffer && !mod->surfmesh.data_element3s_indexbuffer->isdynamic)
            R_Mesh_DestroyMeshBuffer(mod->surfmesh.data_element3s_indexbuffer);
        mod->surfmesh.data_element3s_indexbuffer = NULL;
        if (mod->surfmesh.data_vertex3f_vertexbuffer && !mod->surfmesh.data_vertex3f_vertexbuffer->isdynamic)
            R_Mesh_DestroyMeshBuffer(mod->surfmesh.data_vertex3f_vertexbuffer);
        mod->surfmesh.data_vertex3f_vertexbuffer = NULL;
        mod->surfmesh.data_svector3f_vertexbuffer = NULL;
        mod->surfmesh.data_tvector3f_vertexbuffer = NULL;
        mod->surfmesh.data_normal3f_vertexbuffer = NULL;
        mod->surfmesh.data_texcoordtexture2f_vertexbuffer = NULL;
        mod->surfmesh.data_texcoordlightmap2f_vertexbuffer = NULL;
        mod->surfmesh.data_lightmapcolor4f_vertexbuffer = NULL;
        mod->surfmesh.data_skeletalindex4ub_vertexbuffer = NULL;
        mod->surfmesh.data_skeletalweight4ub_vertexbuffer = NULL;
    }
    // free textures/memory attached to the model
    R_FreeTexturePool(&mod->texturepool);
    Mem_FreePool(&mod->mempool);
    // clear the struct to make it available
    memset(mod, 0, sizeof(model_t));
    // restore the fields we want to preserve
    dp_strlcpy(mod->name, name, sizeof(mod->name));
    mod->brush.parentmodel = parentmodel;
    mod->used = used;
    mod->loaded = false;
}
 
static void R_Model_Null_Draw(entity_render_t *ent)
{
    return;
}
 
 
typedef void (*mod_framegroupify_parsegroups_t) (unsigned int i, int start, int len, float fps, qbool loop, const char *name, void *pass);
 
static int Mod_FrameGroupify_ParseGroups(const char *buf, mod_framegroupify_parsegroups_t cb, void *pass)
{
    const char *bufptr;
    int start, len;
    float fps;
    unsigned int i;
    qbool loop;
    char name[64];
 
    bufptr = buf;
    i = 0;
    while(bufptr)
    {
        // an anim scene!
 
        // REQUIRED: fetch start
        COM_ParseToken_Simple(&bufptr, true, false, true);
        if (!bufptr)
            break; // end of file
        if (!strcmp(com_token, "\n"))
            continue; // empty line
        start = atoi(com_token);
 
        // REQUIRED: fetch length
        COM_ParseToken_Simple(&bufptr, true, false, true);
        if (!bufptr || !strcmp(com_token, "\n"))
        {
            Con_Printf("framegroups file: missing number of frames\n");
            continue;
        }
        len = atoi(com_token);
 
        // OPTIONAL args start
        COM_ParseToken_Simple(&bufptr, true, false, true);
 
        // OPTIONAL: fetch fps
        fps = 20;
        if (bufptr && strcmp(com_token, "\n"))
        {
            fps = atof(com_token);
            COM_ParseToken_Simple(&bufptr, true, false, true);
        }
 
        // OPTIONAL: fetch loopflag
        loop = true;
        if (bufptr && strcmp(com_token, "\n"))
        {
            loop = (atoi(com_token) != 0);
            COM_ParseToken_Simple(&bufptr, true, false, true);
        }
 
        // OPTIONAL: fetch name
        name[0] = 0;
        if (bufptr && strcmp(com_token, "\n"))
        {
            dp_strlcpy(name, com_token, sizeof(name));
            COM_ParseToken_Simple(&bufptr, true, false, true);
        }
 
        // OPTIONAL: remaining unsupported tokens (eat them)
        while (bufptr && strcmp(com_token, "\n"))
            COM_ParseToken_Simple(&bufptr, true, false, true);
 
        //Con_Printf("data: %d %d %d %f %d (%s)\n", i, start, len, fps, loop, name);
 
        if(cb)
            cb(i, start, len, fps, loop, (name[0] ? name : NULL), pass);
        ++i;
    }
 
    return i;
}
 
static void Mod_FrameGroupify_ParseGroups_Store (unsigned int i, int start, int len, float fps, qbool loop, const char *name, void *pass)
{
    model_t *mod = (model_t *) pass;
    animscene_t *anim = &mod->animscenes[i];
    if(name)
        dp_strlcpy(anim->name, name, sizeof(anim[i].name));
    else
        dpsnprintf(anim->name, sizeof(anim[i].name), "groupified_%d_anim", i);
    anim->firstframe = bound(0, start, mod->num_poses - 1);
    anim->framecount = bound(1, len, mod->num_poses - anim->firstframe);
    anim->framerate = max(1, fps);
    anim->loop = !!loop;
    //Con_Printf("frame group %d is %d %d %f %d\n", i, start, len, fps, loop);
}
 
static void Mod_FrameGroupify(model_t *mod, const char *buf)
{
    unsigned int cnt;
 
    // 0. count
    cnt = Mod_FrameGroupify_ParseGroups(buf, NULL, NULL);
    if(!cnt)
    {
        Con_Printf("no scene found in framegroups file, aborting\n");
        return;
    }
    mod->numframes = cnt;
 
    // 1. reallocate
    // (we do not free the previous animscenes, but model unloading will free the pool owning them, so it's okay)
    mod->animscenes = (animscene_t *) Mem_Alloc(mod->mempool, sizeof(animscene_t) * mod->numframes);
 
    // 2. parse
    Mod_FrameGroupify_ParseGroups(buf, Mod_FrameGroupify_ParseGroups_Store, mod);
}
 
static void Mod_FindPotentialDeforms(model_t *mod)
{
    int i, j;
    texture_t *texture;
    mod->wantnormals = false;
    mod->wanttangents = false;
    for (i = 0;i < mod->num_textures;i++)
    {
        texture = mod->data_textures + i;
        if (texture->materialshaderpass && texture->materialshaderpass->tcgen.tcgen == Q3TCGEN_ENVIRONMENT)
            mod->wantnormals = true;
        if (texture->materialshaderpass && texture->materialshaderpass->tcgen.tcgen == Q3TCGEN_ENVIRONMENT)
            mod->wantnormals = true;
        for (j = 0;j < Q3MAXDEFORMS;j++)
        {
            if (texture->deforms[j].deform == Q3DEFORM_AUTOSPRITE)
            {
                mod->wanttangents = true;
                mod->wantnormals = true;
                break;
            }
            if (texture->deforms[j].deform != Q3DEFORM_NONE)
                mod->wantnormals = true;
        }
    }
}
 
/*
==================
Mod_LoadModel
 
Loads a model
==================
*/
model_t *Mod_LoadModel(model_t *mod, qbool crash, qbool checkdisk)
{
    unsigned int crc;
    void *buf;
    fs_offset_t filesize = 0;
    char vabuf[1024];
 
    mod->used = true;
 
    if (mod->name[0] == '*') // submodel
        return mod;
    
    if (!strcmp(mod->name, "null"))
    {
        if(mod->loaded)
            return mod;
 
        if (mod->loaded || mod->mempool)
            Mod_UnloadModel(mod);
 
        if (developer_loading.integer)
            Con_Printf("loading model %s\n", mod->name);
 
        mod->used = true;
        mod->crc = (unsigned int)-1;
        mod->loaded = false;
 
        VectorClear(mod->normalmins);
        VectorClear(mod->normalmaxs);
        VectorClear(mod->yawmins);
        VectorClear(mod->yawmaxs);
        VectorClear(mod->rotatedmins);
        VectorClear(mod->rotatedmaxs);
 
        mod->modeldatatypestring = "null";
        mod->type = mod_null;
        mod->Draw = R_Model_Null_Draw;
        mod->numframes = 2;
        mod->numskins = 1;
 
        // no fatal errors occurred, so this model is ready to use.
        mod->loaded = true;
 
        return mod;
    }
 
    crc = 0;
    buf = NULL;
 
    // even if the model is loaded it still may need reloading...
 
    // if it is not loaded or checkdisk is true we need to calculate the crc
    if (!mod->loaded || checkdisk)
    {
        if (checkdisk && mod->loaded)
            Con_DPrintf("checking model %s\n", mod->name);
        buf = FS_LoadFile (mod->name, tempmempool, false, &filesize);
        if (buf)
        {
            crc = CRC_Block((unsigned char *)buf, filesize);
            // we need to reload the model if the crc does not match
            if (mod->crc != crc)
                mod->loaded = false;
        }
    }
 
    // if the model is already loaded and checks passed, just return
    if (mod->loaded)
    {
        if (buf)
            Mem_Free(buf);
        return mod;
    }
 
    if (developer_loading.integer)
        Con_Printf("loading model %s\n", mod->name);
    
    SCR_PushLoadingScreen(mod->name, 1);
 
    // LadyHavoc: unload the existing model in this slot (if there is one)
    if (mod->loaded || mod->mempool)
        Mod_UnloadModel(mod);
 
    // load the model
    mod->used = true;
    mod->crc = crc;
    // errors can prevent the corresponding mod->loaded = true;
    mod->loaded = false;
 
    // default lightmap scale
    mod->lightmapscale = 1;
 
    // default model radius and bounding box (mainly for missing models)
    mod->radius = 16;
    VectorSet(mod->normalmins, -mod->radius, -mod->radius, -mod->radius);
    VectorSet(mod->normalmaxs, mod->radius, mod->radius, mod->radius);
    VectorSet(mod->yawmins, -mod->radius, -mod->radius, -mod->radius);
    VectorSet(mod->yawmaxs, mod->radius, mod->radius, mod->radius);
    VectorSet(mod->rotatedmins, -mod->radius, -mod->radius, -mod->radius);
    VectorSet(mod->rotatedmaxs, mod->radius, mod->radius, mod->radius);
 
    if (!q3shaders_mem)
    {
        // load q3 shaders for the first time, or after a level change
        Mod_LoadQ3Shaders();
    }
 
    if (buf)
    {
        int i;
        const char *ext = FS_FileExtension(mod->name);  
        char *bufend = (char *)buf + filesize;
        // all models use memory, so allocate a memory pool
        mod->mempool = Mem_AllocPool(mod->name, 0, NULL);
 
        // We need to have a reference to the base model in case we're parsing submodels
        loadmodel = mod;
 
        // Call the appropriate loader. Try matching magic bytes.
        for (i = 0; loader[i].Load; i++)
        {
            // Headerless formats can just load based on extension. Otherwise match the magic string.
            if((loader[i].extension && !strcasecmp(ext, loader[i].extension) && !loader[i].header) ||
               (loader[i].header && !memcmp(buf, loader[i].header, loader[i].headersize)))
            {
                // Matched. Load it.
                loader[i].Load(mod, buf, bufend);
                Mem_Free(buf);
 
                Mod_FindPotentialDeforms(mod);
 
                buf = FS_LoadFile(va(vabuf, sizeof(vabuf), "%s.framegroups", mod->name), tempmempool, false, &filesize);
                if(buf)
                {
                    Mod_FrameGroupify(mod, (const char *)buf);
                    Mem_Free(buf);
                }
 
                Mod_SetDrawSkyAndWater(mod);
                Mod_BuildVBOs();
                break;
            }
        }
        if(!loader[i].Load)
            Con_Printf(CON_ERROR "Mod_LoadModel: model \"%s\" is of unknown/unsupported type\n", mod->name);
    }
    else if (crash)
        // LadyHavoc: Sys_Error was *ANNOYING*
        Con_Printf (CON_ERROR "Mod_LoadModel: %s not found\n", mod->name);
 
    // no fatal errors occurred, so this model is ready to use.
    mod->loaded = true;
 
    SCR_PopLoadingScreen(false);
 
    return mod;
}
 
void Mod_ClearUsed(void)
{
    int i;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0])
            mod->used = false;
}
 
void Mod_PurgeUnused(void)
{
    int i;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
    for (i = 0;i < nummodels;i++)
    {
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && !mod->used)
        {
            Mod_UnloadModel(mod);
            Mem_ExpandableArray_FreeRecord(&models, mod);
        }
    }
}
 
/*
==================
Mod_FindName
 
==================
*/
model_t *Mod_FindName(const char *name, const char *parentname)
{
    int i;
    int nummodels;
    model_t *mod;
 
    if (!parentname)
        parentname = "";
 
    nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
 
    if (!name[0])
        Host_Error ("Mod_ForName: empty name");
 
    // search the currently loaded models
    for (i = 0;i < nummodels;i++)
    {
        if ((mod = (model_t*) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && !strcmp(mod->name, name) && ((!mod->brush.parentmodel && !parentname[0]) || (mod->brush.parentmodel && parentname[0] && !strcmp(mod->brush.parentmodel->name, parentname))))
        {
            mod->used = true;
            return mod;
        }
    }
 
    // no match found, create a new one
    mod = (model_t *) Mem_ExpandableArray_AllocRecord(&models);
    dp_strlcpy(mod->name, name, sizeof(mod->name));
    if (parentname[0])
        mod->brush.parentmodel = Mod_FindName(parentname, NULL);
    else
        mod->brush.parentmodel = NULL;
    mod->loaded = false;
    mod->used = true;
    return mod;
}
 
extern qbool vid_opened;
 
/*
==================
Mod_ForName
 
Loads in a model for the given name
==================
*/
model_t *Mod_ForName(const char *name, qbool crash, qbool checkdisk, const char *parentname)
{
    model_t *model;
 
    // FIXME: So we don't crash if a server is started early.
    if(!vid_opened)
        CL_StartVideo();
 
    model = Mod_FindName(name, parentname);
    if (!model->loaded || checkdisk)
        Mod_LoadModel(model, crash, checkdisk);
    return model;
}
 
/*
==================
Mod_Reload
 
Reloads all models if they have changed
==================
*/
void Mod_Reload(void)
{
    int i, count;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
 
    SCR_PushLoadingScreen("Reloading models", 1.0);
    count = 0;
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t *) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*' && mod->used)
            ++count;
    for (i = 0;i < nummodels;i++)
        if ((mod = (model_t *) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*' && mod->used)
        {
            SCR_PushLoadingScreen(mod->name, 1.0 / count);
            Mod_LoadModel(mod, true, true);
            SCR_PopLoadingScreen(false);
        }
    SCR_PopLoadingScreen(false);
}
 
unsigned char *mod_base;
 
 
//=============================================================================
 
/*
================
Mod_Print
================
*/
static void Mod_Print_f(cmd_state_t *cmd)
{
    int i;
    int nummodels = (int)Mem_ExpandableArray_IndexRange(&models);
    model_t *mod;
 
    Con_Print("Loaded models:\n");
    for (i = 0;i < nummodels;i++)
    {
        if ((mod = (model_t *) Mem_ExpandableArray_RecordAtIndex(&models, i)) && mod->name[0] && mod->name[0] != '*')
        {
            if (mod->brush.numsubmodels)
                Con_Printf("%4iK %s (%i submodels)\n", mod->mempool ? (int)((mod->mempool->totalsize + 1023) / 1024) : 0, mod->name, mod->brush.numsubmodels);
            else
                Con_Printf("%4iK %s\n", mod->mempool ? (int)((mod->mempool->totalsize + 1023) / 1024) : 0, mod->name);
        }
    }
}
 
/*
================
Mod_Precache
================
*/
static void Mod_Precache_f(cmd_state_t *cmd)
{
    if (Cmd_Argc(cmd) == 2)
        Mod_ForName(Cmd_Argv(cmd, 1), false, true, Cmd_Argv(cmd, 1)[0] == '*' ? cl.model_name[1] : NULL);
    else
        Con_Print("usage: modelprecache <filename>\n");
}
 
int Mod_BuildVertexRemapTableFromElements(int numelements, const int *elements, int numvertices, int *remapvertices)
{
    int i, count;
    unsigned char *used;
    used = (unsigned char *)Mem_Alloc(tempmempool, numvertices);
    memset(used, 0, numvertices);
    for (i = 0;i < numelements;i++)
        used[elements[i]] = 1;
    for (i = 0, count = 0;i < numvertices;i++)
        remapvertices[i] = used[i] ? count++ : -1;
    Mem_Free(used);
    return count;
}
 
qbool Mod_ValidateElements(int *element3i, unsigned short *element3s, int numtriangles, int firstvertex, int numvertices, const char *filename, int fileline)
{
    int first = firstvertex, last = first + numvertices - 1, numelements = numtriangles * 3;
    int i;
    int invalidintcount = 0, invalidintexample = 0;
    int invalidshortcount = 0, invalidshortexample = 0;
    int invalidmismatchcount = 0, invalidmismatchexample = 0;
    if (element3i)
    {
        for (i = 0; i < numelements; i++)
        {
            if (element3i[i] < first || element3i[i] > last)
            {
                invalidintcount++;
                invalidintexample = i;
            }
        }
    }
    if (element3s)
    {
        for (i = 0; i < numelements; i++)
        {
            if (element3s[i] < first || element3s[i] > last)
            {
                invalidintcount++;
                invalidintexample = i;
            }
        }
    }
    if (element3i && element3s)
    {
        for (i = 0; i < numelements; i++)
        {
            if (element3s[i] != element3i[i])
            {
                invalidmismatchcount++;
                invalidmismatchexample = i;
            }
        }
    }
    if (invalidintcount || invalidshortcount || invalidmismatchcount)
    {
        Con_Printf("Mod_ValidateElements(%i, %i, %i, %p, %p) called at %s:%d", numelements, first, last, (void *)element3i, (void *)element3s, filename, fileline);
        Con_Printf(", %i elements are invalid in element3i (example: element3i[%i] == %i)", invalidintcount, invalidintexample, element3i ? element3i[invalidintexample] : 0);
        Con_Printf(", %i elements are invalid in element3s (example: element3s[%i] == %i)", invalidshortcount, invalidshortexample, element3s ? element3s[invalidshortexample] : 0);
        Con_Printf(", %i elements mismatch between element3i and element3s (example: element3s[%i] is %i and element3i[%i] is %i)", invalidmismatchcount, invalidmismatchexample, element3s ? element3s[invalidmismatchexample] : 0, invalidmismatchexample, element3i ? element3i[invalidmismatchexample] : 0);
        Con_Print(".  Please debug the engine code - these elements have been modified to not crash, but nothing more.\n");
 
        // edit the elements to make them safer, as the driver will crash otherwise
        if (element3i)
            for (i = 0; i < numelements; i++)
                if (element3i[i] < first || element3i[i] > last)
                    element3i[i] = first;
        if (element3s)
            for (i = 0; i < numelements; i++)
                if (element3s[i] < first || element3s[i] > last)
                    element3s[i] = first;
        if (element3i && element3s)
            for (i = 0; i < numelements; i++)
                if (element3s[i] != element3i[i])
                    element3s[i] = element3i[i];
 
        return false;
    }
    return true;
}
 
// warning: this is an expensive function!
void Mod_BuildNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const int *elements, float *normal3f, qbool areaweighting)
{
    int i, j;
    const int *element;
    float *vectorNormal;
    float areaNormal[3];
    // clear the vectors
    memset(normal3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
    // process each vertex of each triangle and accumulate the results
    // use area-averaging, to make triangles with a big area have a bigger
    // weighting on the vertex normal than triangles with a small area
    // to do so, just add the 'normals' together (the bigger the area
    // the greater the length of the normal is
    element = elements;
    for (i = 0; i < numtriangles; i++, element += 3)
    {
        TriangleNormal(
            vertex3f + element[0] * 3,
            vertex3f + element[1] * 3,
            vertex3f + element[2] * 3,
            areaNormal
            );
 
        if (!areaweighting)
            VectorNormalize(areaNormal);
 
        for (j = 0;j < 3;j++)
        {
            vectorNormal = normal3f + element[j] * 3;
            vectorNormal[0] += areaNormal[0];
            vectorNormal[1] += areaNormal[1];
            vectorNormal[2] += areaNormal[2];
        }
    }
    // and just normalize the accumulated vertex normal in the end
    vectorNormal = normal3f + 3 * firstvertex;
    for (i = 0; i < numvertices; i++, vectorNormal += 3)
        VectorNormalize(vectorNormal);
}
 
#if 0
static void Mod_BuildBumpVectors(const float *v0, const float *v1, const float *v2, const float *tc0, const float *tc1, const float *tc2, float *svector3f, float *tvector3f, float *normal3f)
{
    float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
    // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
    // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 
    // 6 multiply, 9 subtract
    VectorSubtract(v1, v0, v10);
    VectorSubtract(v2, v0, v20);
    normal3f[0] = v20[1] * v10[2] - v20[2] * v10[1];
    normal3f[1] = v20[2] * v10[0] - v20[0] * v10[2];
    normal3f[2] = v20[0] * v10[1] - v20[1] * v10[0];
    // 12 multiply, 10 subtract
    tc10[1] = tc1[1] - tc0[1];
    tc20[1] = tc2[1] - tc0[1];
    svector3f[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
    svector3f[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
    svector3f[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
    tc10[0] = tc1[0] - tc0[0];
    tc20[0] = tc2[0] - tc0[0];
    tvector3f[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
    tvector3f[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
    tvector3f[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
    // 12 multiply, 4 add, 6 subtract
    f = DotProduct(svector3f, normal3f);
    svector3f[0] -= f * normal3f[0];
    svector3f[1] -= f * normal3f[1];
    svector3f[2] -= f * normal3f[2];
    f = DotProduct(tvector3f, normal3f);
    tvector3f[0] -= f * normal3f[0];
    tvector3f[1] -= f * normal3f[1];
    tvector3f[2] -= f * normal3f[2];
    // if texture is mapped the wrong way (counterclockwise), the tangents
    // have to be flipped, this is detected by calculating a normal from the
    // two tangents, and seeing if it is opposite the surface normal
    // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
    CrossProduct(tvector3f, svector3f, tangentcross);
    if (DotProduct(tangentcross, normal3f) < 0)
    {
        VectorNegate(svector3f, svector3f);
        VectorNegate(tvector3f, tvector3f);
    }
}
#endif
 
// warning: this is a very expensive function!
void Mod_BuildTextureVectorsFromNormals(int firstvertex, int numvertices, int numtriangles, const float *vertex3f, const float *texcoord2f, const float *normal3f, const int *elements, float *svector3f, float *tvector3f, qbool areaweighting)
{
    int i, tnum;
    float sdir[3], tdir[3], normal[3], *svec, *tvec;
    const float *v0, *v1, *v2, *tc0, *tc1, *tc2, *n;
    float f, tangentcross[3], v10[3], v20[3], tc10[2], tc20[2];
    const int *e;
    // clear the vectors
    memset(svector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
    memset(tvector3f + 3 * firstvertex, 0, numvertices * sizeof(float[3]));
    // process each vertex of each triangle and accumulate the results
    for (tnum = 0, e = elements;tnum < numtriangles;tnum++, e += 3)
    {
        v0 = vertex3f + e[0] * 3;
        v1 = vertex3f + e[1] * 3;
        v2 = vertex3f + e[2] * 3;
        tc0 = texcoord2f + e[0] * 2;
        tc1 = texcoord2f + e[1] * 2;
        tc2 = texcoord2f + e[2] * 2;
 
        // 79 add/sub/negate/multiply (1 cycle), 1 compare (3 cycle?), total cycles not counting load/store/exchange roughly 82 cycles
        // 6 add, 28 subtract, 39 multiply, 1 compare, 50% chance of 6 negates
 
        // calculate the edge directions and surface normal
        // 6 multiply, 9 subtract
        VectorSubtract(v1, v0, v10);
        VectorSubtract(v2, v0, v20);
        normal[0] = v20[1] * v10[2] - v20[2] * v10[1];
        normal[1] = v20[2] * v10[0] - v20[0] * v10[2];
        normal[2] = v20[0] * v10[1] - v20[1] * v10[0];
 
        // calculate the tangents
        // 12 multiply, 10 subtract
        tc10[1] = tc1[1] - tc0[1];
        tc20[1] = tc2[1] - tc0[1];
        sdir[0] = tc10[1] * v20[0] - tc20[1] * v10[0];
        sdir[1] = tc10[1] * v20[1] - tc20[1] * v10[1];
        sdir[2] = tc10[1] * v20[2] - tc20[1] * v10[2];
        tc10[0] = tc1[0] - tc0[0];
        tc20[0] = tc2[0] - tc0[0];
        tdir[0] = tc10[0] * v20[0] - tc20[0] * v10[0];
        tdir[1] = tc10[0] * v20[1] - tc20[0] * v10[1];
        tdir[2] = tc10[0] * v20[2] - tc20[0] * v10[2];
 
        // if texture is mapped the wrong way (counterclockwise), the tangents
        // have to be flipped, this is detected by calculating a normal from the
        // two tangents, and seeing if it is opposite the surface normal
        // 9 multiply, 2 add, 3 subtract, 1 compare, 50% chance of: 6 negates
        CrossProduct(tdir, sdir, tangentcross);
        if (DotProduct(tangentcross, normal) < 0)
        {
            VectorNegate(sdir, sdir);
            VectorNegate(tdir, tdir);
        }
 
        if (!areaweighting)
        {
            VectorNormalize(sdir);
            VectorNormalize(tdir);
        }
        for (i = 0;i < 3;i++)
        {
            VectorAdd(svector3f + e[i]*3, sdir, svector3f + e[i]*3);
            VectorAdd(tvector3f + e[i]*3, tdir, tvector3f + e[i]*3);
        }
    }
    // make the tangents completely perpendicular to the surface normal, and
    // then normalize them
    // 16 assignments, 2 divide, 2 sqrt, 2 negates, 14 adds, 24 multiplies
    for (i = 0, svec = svector3f + 3 * firstvertex, tvec = tvector3f + 3 * firstvertex, n = normal3f + 3 * firstvertex;i < numvertices;i++, svec += 3, tvec += 3, n += 3)
    {
        f = -DotProduct(svec, n);
        VectorMA(svec, f, n, svec);
        VectorNormalize(svec);
        f = -DotProduct(tvec, n);
        VectorMA(tvec, f, n, tvec);
        VectorNormalize(tvec);
    }
}
 
void Mod_AllocSurfMesh(mempool_t *mempool, int numvertices, int numtriangles, qbool lightmapoffsets, qbool vertexcolors)
{
    unsigned char *data;
    data = (unsigned char *)Mem_Alloc(mempool, numvertices * (3 + 3 + 3 + 3 + 2 + 2 + (vertexcolors ? 4 : 0)) * sizeof(float) + numvertices * (lightmapoffsets ? 1 : 0) * sizeof(int) + numtriangles * sizeof(int[3]) + (numvertices <= 65536 ? numtriangles * sizeof(unsigned short[3]) : 0));
    loadmodel->surfmesh.num_vertices = numvertices;
    loadmodel->surfmesh.num_triangles = numtriangles;
    if (loadmodel->surfmesh.num_vertices)
    {
        loadmodel->surfmesh.data_vertex3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
        loadmodel->surfmesh.data_svector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
        loadmodel->surfmesh.data_tvector3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
        loadmodel->surfmesh.data_normal3f = (float *)data, data += sizeof(float[3]) * loadmodel->surfmesh.num_vertices;
        loadmodel->surfmesh.data_texcoordtexture2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
        loadmodel->surfmesh.data_texcoordlightmap2f = (float *)data, data += sizeof(float[2]) * loadmodel->surfmesh.num_vertices;
        if (vertexcolors)
            loadmodel->surfmesh.data_lightmapcolor4f = (float *)data, data += sizeof(float[4]) * loadmodel->surfmesh.num_vertices;
        if (lightmapoffsets)
            loadmodel->surfmesh.data_lightmapoffsets = (int *)data, data += sizeof(int) * loadmodel->surfmesh.num_vertices;
    }
    if (loadmodel->surfmesh.num_triangles)
    {
        loadmodel->surfmesh.data_element3i = (int *)data, data += sizeof(int[3]) * loadmodel->surfmesh.num_triangles;
        if (loadmodel->surfmesh.num_vertices <= 65536)
            loadmodel->surfmesh.data_element3s = (unsigned short *)data, data += sizeof(unsigned short[3]) * loadmodel->surfmesh.num_triangles;
    }
}
 
shadowmesh_t *Mod_ShadowMesh_Alloc(mempool_t *mempool, int maxverts, int maxtriangles)
{
    shadowmesh_t *newmesh;
    newmesh = (shadowmesh_t *)Mem_Alloc(mempool, sizeof(shadowmesh_t));
    newmesh->mempool = mempool;
    newmesh->maxverts = maxverts;
    newmesh->maxtriangles = maxtriangles;
    newmesh->numverts = 0;
    newmesh->numtriangles = 0;
    memset(newmesh->sideoffsets, 0, sizeof(newmesh->sideoffsets));
    memset(newmesh->sidetotals, 0, sizeof(newmesh->sidetotals));
 
    newmesh->vertex3f = (float *)Mem_Alloc(mempool, maxverts * sizeof(float[3]));
    newmesh->element3i = (int *)Mem_Alloc(mempool, maxtriangles * sizeof(int[3]));
    newmesh->vertexhashtable = (shadowmeshvertexhash_t **)Mem_Alloc(mempool, SHADOWMESHVERTEXHASH * sizeof(shadowmeshvertexhash_t *));
    newmesh->vertexhashentries = (shadowmeshvertexhash_t *)Mem_Alloc(mempool, maxverts * sizeof(shadowmeshvertexhash_t));
    return newmesh;
}
 
int Mod_ShadowMesh_AddVertex(shadowmesh_t *mesh, const float *vertex3f)
{
    int hashindex, vnum;
    shadowmeshvertexhash_t *hash;
    // this uses prime numbers intentionally
    hashindex = (unsigned int) (vertex3f[0] * 2003 + vertex3f[1] * 4001 + vertex3f[2] * 7919) % SHADOWMESHVERTEXHASH;
    for (hash = mesh->vertexhashtable[hashindex];hash;hash = hash->next)
    {
        vnum = (hash - mesh->vertexhashentries);
        if (mesh->vertex3f[vnum * 3 + 0] == vertex3f[0] && mesh->vertex3f[vnum * 3 + 1] == vertex3f[1] && mesh->vertex3f[vnum * 3 + 2] == vertex3f[2])
            return hash - mesh->vertexhashentries;
    }
    vnum = mesh->numverts++;
    hash = mesh->vertexhashentries + vnum;
    hash->next = mesh->vertexhashtable[hashindex];
    mesh->vertexhashtable[hashindex] = hash;
    mesh->vertex3f[vnum * 3 + 0] = vertex3f[0];
    mesh->vertex3f[vnum * 3 + 1] = vertex3f[1];
    mesh->vertex3f[vnum * 3 + 2] = vertex3f[2];
    return vnum;
}
 
void Mod_ShadowMesh_AddMesh(shadowmesh_t *mesh, const float *vertex3f, int numtris, const int *element3i)
{
    int i;
 
    for (i = 0;i < numtris;i++)
    {
        if ((mesh->numtriangles * 3 + 2) * sizeof(int) + 1 >= Mem_Size(mesh->element3i))
        {
            // FIXME: we didn't allocate enough space for all the tris, see R_Mod_CompileShadowMap
            Con_Print(CON_WARN "Mod_ShadowMesh_AddMesh: insufficient memory allocated!\n");
            return;
        }
        mesh->element3i[mesh->numtriangles * 3 + 0] = Mod_ShadowMesh_AddVertex(mesh, vertex3f + 3 * element3i[i * 3 + 0]);
        mesh->element3i[mesh->numtriangles * 3 + 1] = Mod_ShadowMesh_AddVertex(mesh, vertex3f + 3 * element3i[i * 3 + 1]);
        mesh->element3i[mesh->numtriangles * 3 + 2] = Mod_ShadowMesh_AddVertex(mesh, vertex3f + 3 * element3i[i * 3 + 2]);
        mesh->numtriangles++;
    }
 
    // the triangle calculation can take a while, so let's do a keepalive here
    CL_KeepaliveMessage(false);
}
 
shadowmesh_t *Mod_ShadowMesh_Begin(mempool_t *mempool, int maxverts, int maxtriangles)
{
    // the preparation before shadow mesh initialization can take a while, so let's do a keepalive here
    CL_KeepaliveMessage(false);
 
    return Mod_ShadowMesh_Alloc(mempool, maxverts, maxtriangles);
}
 
static void Mod_ShadowMesh_CreateVBOs(shadowmesh_t *mesh)
{
    if (!mesh->numverts)
        return;
 
    // make sure we don't crash inside the driver if something went wrong, as it's annoying to debug
    Mod_ValidateElements(mesh->element3i, mesh->element3s, mesh->numtriangles, 0, mesh->numverts, __FILE__, __LINE__);
 
    // upload short indices as a buffer
    if (mesh->element3s && !mesh->element3s_indexbuffer)
        mesh->element3s_indexbuffer = R_Mesh_CreateMeshBuffer(mesh->element3s, mesh->numtriangles * sizeof(short[3]), "shadowmesh", true, false, false, true);
 
    // upload int indices as a buffer
    if (mesh->element3i && !mesh->element3i_indexbuffer && !mesh->element3s)
        mesh->element3i_indexbuffer = R_Mesh_CreateMeshBuffer(mesh->element3i, mesh->numtriangles * sizeof(int[3]), "shadowmesh", true, false, false, false);
 
    // vertex buffer is several arrays and we put them in the same buffer
    //
    // is this wise?  the texcoordtexture2f array is used with dynamic
    // vertex/svector/tvector/normal when rendering animated models, on the
    // other hand animated models don't use a lot of vertices anyway...
    if (!mesh->vbo_vertexbuffer)
    {
        mesh->vbooffset_vertex3f = 0;
        mesh->vbo_vertexbuffer = R_Mesh_CreateMeshBuffer(mesh->vertex3f, mesh->numverts * sizeof(float[3]), "shadowmesh", false, false, false, false);
    }
}
 
shadowmesh_t *Mod_ShadowMesh_Finish(shadowmesh_t *mesh, qbool createvbo)
{
    if (mesh->numverts >= 3 && mesh->numtriangles >= 1)
    {
        if (mesh->vertexhashentries)
            Mem_Free(mesh->vertexhashentries);
        mesh->vertexhashentries = NULL;
        if (mesh->vertexhashtable)
            Mem_Free(mesh->vertexhashtable);
        mesh->vertexhashtable = NULL;
        if (mesh->maxverts > mesh->numverts)
        {
            mesh->vertex3f = (float *)Mem_Realloc(mesh->mempool, mesh->vertex3f, mesh->numverts * sizeof(float[3]));
            mesh->maxverts = mesh->numverts;
        }
        if (mesh->maxtriangles > mesh->numtriangles)
        {
            mesh->element3i = (int *)Mem_Realloc(mesh->mempool, mesh->element3i, mesh->numtriangles * sizeof(int[3]));
            mesh->maxtriangles = mesh->numtriangles;
        }
        if (mesh->numverts <= 65536)
        {
            int i;
            mesh->element3s = (unsigned short *)Mem_Alloc(mesh->mempool, mesh->numtriangles * sizeof(unsigned short[3]));
            for (i = 0;i < mesh->numtriangles*3;i++)
                mesh->element3s[i] = mesh->element3i[i];
        }
        if (createvbo)
            Mod_ShadowMesh_CreateVBOs(mesh);
    }
 
    // this can take a while, so let's do a keepalive here
    CL_KeepaliveMessage(false);
 
    return mesh;
}
 
void Mod_ShadowMesh_CalcBBox(shadowmesh_t *mesh, vec3_t mins, vec3_t maxs, vec3_t center, float *radius)
{
    int i;
    vec3_t nmins, nmaxs, ncenter, temp;
    float nradius2, dist2, *v;
    VectorClear(nmins);
    VectorClear(nmaxs);
    // calculate bbox
    VectorCopy(mesh->vertex3f, nmins);
    VectorCopy(mesh->vertex3f, nmaxs);
    for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
    {
        if (nmins[0] > v[0]) { nmins[0] = v[0]; } if (nmaxs[0] < v[0]) { nmaxs[0] = v[0]; }
        if (nmins[1] > v[1]) { nmins[1] = v[1]; } if (nmaxs[1] < v[1]) { nmaxs[1] = v[1]; }
        if (nmins[2] > v[2]) { nmins[2] = v[2]; } if (nmaxs[2] < v[2]) { nmaxs[2] = v[2]; }
    }
    // calculate center and radius
    ncenter[0] = (nmins[0] + nmaxs[0]) * 0.5f;
    ncenter[1] = (nmins[1] + nmaxs[1]) * 0.5f;
    ncenter[2] = (nmins[2] + nmaxs[2]) * 0.5f;
    nradius2 = 0;
    for (i = 0, v = mesh->vertex3f;i < mesh->numverts;i++, v += 3)
    {
        VectorSubtract(v, ncenter, temp);
        dist2 = DotProduct(temp, temp);
        if (nradius2 < dist2)
            nradius2 = dist2;
    }
    // return data
    if (mins)
        VectorCopy(nmins, mins);
    if (maxs)
        VectorCopy(nmaxs, maxs);
    if (center)
        VectorCopy(ncenter, center);
    if (radius)
        *radius = sqrt(nradius2);
}
 
void Mod_ShadowMesh_Free(shadowmesh_t *mesh)
{
    if (mesh->element3i_indexbuffer)
        R_Mesh_DestroyMeshBuffer(mesh->element3i_indexbuffer);
    if (mesh->element3s_indexbuffer)
        R_Mesh_DestroyMeshBuffer(mesh->element3s_indexbuffer);
    if (mesh->vbo_vertexbuffer)
        R_Mesh_DestroyMeshBuffer(mesh->vbo_vertexbuffer);
    if (mesh->vertex3f)
        Mem_Free(mesh->vertex3f);
    if (mesh->element3i)
        Mem_Free(mesh->element3i);
    if (mesh->element3s)
        Mem_Free(mesh->element3s);
    if (mesh->vertexhashentries)
        Mem_Free(mesh->vertexhashentries);
    if (mesh->vertexhashtable)
        Mem_Free(mesh->vertexhashtable);
    Mem_Free(mesh);
}
 
void Mod_CreateCollisionMesh(model_t *mod)
{
    int k, numcollisionmeshtriangles;
    qbool usesinglecollisionmesh = false;
    const msurface_t *surface = NULL;
 
    mempool_t *mempool = mod->mempool;
    if (!mempool && mod->brush.parentmodel)
        mempool = mod->brush.parentmodel->mempool;
    // make a single combined collision mesh for physics engine use
    // TODO rewrite this to use the collision brushes as source, to fix issues with e.g. common/caulk which creates no drawsurface
    numcollisionmeshtriangles = 0;
    for (k = mod->submodelsurfaces_start;k < mod->submodelsurfaces_end;k++)
    {
        surface = mod->data_surfaces + k;
        if (!strcmp(surface->texture->name, "collision") || !strcmp(surface->texture->name, "collisionconvex")) // found collision mesh
        {
            usesinglecollisionmesh = true;
            numcollisionmeshtriangles = surface->num_triangles;
            break;
        }
        if (!(surface->texture->supercontents & SUPERCONTENTS_SOLID))
            continue;
        numcollisionmeshtriangles += surface->num_triangles;
    }
    mod->brush.collisionmesh = Mod_ShadowMesh_Begin(mempool, numcollisionmeshtriangles * 3, numcollisionmeshtriangles);
    if (usesinglecollisionmesh)
        Mod_ShadowMesh_AddMesh(mod->brush.collisionmesh, mod->surfmesh.data_vertex3f, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
    else
    {
        for (k = mod->submodelsurfaces_start; k < mod->submodelsurfaces_end; k++)
        {
            surface = mod->data_surfaces + k;
            if (!(surface->texture->supercontents & SUPERCONTENTS_SOLID))
                continue;
            Mod_ShadowMesh_AddMesh(mod->brush.collisionmesh, mod->surfmesh.data_vertex3f, surface->num_triangles, (mod->surfmesh.data_element3i + 3 * surface->num_firsttriangle));
        }
    }
    mod->brush.collisionmesh = Mod_ShadowMesh_Finish(mod->brush.collisionmesh, false);
}
 
#if 0
static void Mod_GetTerrainVertex3fTexCoord2fFromBGRA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
{
    float v[3], tc[3];
    v[0] = ix;
    v[1] = iy;
    if (ix >= 0 && iy >= 0 && ix < imagewidth && iy < imageheight)
        v[2] = (imagepixels[((iy*imagewidth)+ix)*4+0] + imagepixels[((iy*imagewidth)+ix)*4+1] + imagepixels[((iy*imagewidth)+ix)*4+2]) * (1.0f / 765.0f);
    else
        v[2] = 0;
    Matrix4x4_Transform(pixelstepmatrix, v, vertex3f);
    Matrix4x4_Transform(pixeltexturestepmatrix, v, tc);
    texcoord2f[0] = tc[0];
    texcoord2f[1] = tc[1];
}
 
static void Mod_GetTerrainVertexFromBGRA(const unsigned char *imagepixels, int imagewidth, int imageheight, int ix, int iy, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
{
    float vup[3], vdown[3], vleft[3], vright[3];
    float tcup[3], tcdown[3], tcleft[3], tcright[3];
    float sv[3], tv[3], nl[3];
    Mod_GetTerrainVertex3fTexCoord2fFromBGRA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, pixelstepmatrix, pixeltexturestepmatrix);
    Mod_GetTerrainVertex3fTexCoord2fFromBGRA(imagepixels, imagewidth, imageheight, ix, iy - 1, vup, tcup, pixelstepmatrix, pixeltexturestepmatrix);
    Mod_GetTerrainVertex3fTexCoord2fFromBGRA(imagepixels, imagewidth, imageheight, ix, iy + 1, vdown, tcdown, pixelstepmatrix, pixeltexturestepmatrix);
    Mod_GetTerrainVertex3fTexCoord2fFromBGRA(imagepixels, imagewidth, imageheight, ix - 1, iy, vleft, tcleft, pixelstepmatrix, pixeltexturestepmatrix);
    Mod_GetTerrainVertex3fTexCoord2fFromBGRA(imagepixels, imagewidth, imageheight, ix + 1, iy, vright, tcright, pixelstepmatrix, pixeltexturestepmatrix);
    Mod_BuildBumpVectors(vertex3f, vup, vright, texcoord2f, tcup, tcright, svector3f, tvector3f, normal3f);
    Mod_BuildBumpVectors(vertex3f, vright, vdown, texcoord2f, tcright, tcdown, sv, tv, nl);
    VectorAdd(svector3f, sv, svector3f);
    VectorAdd(tvector3f, tv, tvector3f);
    VectorAdd(normal3f, nl, normal3f);
    Mod_BuildBumpVectors(vertex3f, vdown, vleft, texcoord2f, tcdown, tcleft, sv, tv, nl);
    VectorAdd(svector3f, sv, svector3f);
    VectorAdd(tvector3f, tv, tvector3f);
    VectorAdd(normal3f, nl, normal3f);
    Mod_BuildBumpVectors(vertex3f, vleft, vup, texcoord2f, tcleft, tcup, sv, tv, nl);
    VectorAdd(svector3f, sv, svector3f);
    VectorAdd(tvector3f, tv, tvector3f);
    VectorAdd(normal3f, nl, normal3f);
}
 
static void Mod_ConstructTerrainPatchFromBGRA(const unsigned char *imagepixels, int imagewidth, int imageheight, int x1, int y1, int width, int height, int *element3i, float *vertex3f, float *svector3f, float *tvector3f, float *normal3f, float *texcoord2f, matrix4x4_t *pixelstepmatrix, matrix4x4_t *pixeltexturestepmatrix)
{
    int x, y, ix, iy, *e;
    e = element3i;
    for (y = 0;y < height;y++)
    {
        for (x = 0;x < width;x++)
        {
            e[0] = (y + 1) * (width + 1) + (x + 0);
            e[1] = (y + 0) * (width + 1) + (x + 0);
            e[2] = (y + 1) * (width + 1) + (x + 1);
            e[3] = (y + 0) * (width + 1) + (x + 0);
            e[4] = (y + 0) * (width + 1) + (x + 1);
            e[5] = (y + 1) * (width + 1) + (x + 1);
            e += 6;
        }
    }
    for (y = 0, iy = y1;y < height + 1;y++, iy++)
        for (x = 0, ix = x1;x < width + 1;x++, ix++, vertex3f += 3, texcoord2f += 2, svector3f += 3, tvector3f += 3, normal3f += 3)
            Mod_GetTerrainVertexFromBGRA(imagepixels, imagewidth, imageheight, ix, iy, vertex3f, texcoord2f, svector3f, tvector3f, normal3f, pixelstepmatrix, pixeltexturestepmatrix);
}
#endif
 
#if 0
void Mod_Terrain_SurfaceRecurseChunk(model_t *model, int stepsize, int x, int y)
{
    float mins[3];
    float maxs[3];
    float chunkwidth = min(stepsize, model->terrain.width - 1 - x);
    float chunkheight = min(stepsize, model->terrain.height - 1 - y);
    float viewvector[3];
    unsigned int firstvertex;
    unsigned int *e;
    float *v;
    if (chunkwidth < 2 || chunkheight < 2)
        return;
    VectorSet(mins, model->terrain.mins[0] +  x    * stepsize * model->terrain.scale[0], model->terrain.mins[1] +  y    * stepsize * model->terrain.scale[1], model->terrain.mins[2]);
    VectorSet(maxs, model->terrain.mins[0] + (x+1) * stepsize * model->terrain.scale[0], model->terrain.mins[1] + (y+1) * stepsize * model->terrain.scale[1], model->terrain.maxs[2]);
    viewvector[0] = bound(mins[0], localvieworigin, maxs[0]) - model->terrain.vieworigin[0];
    viewvector[1] = bound(mins[1], localvieworigin, maxs[1]) - model->terrain.vieworigin[1];
    viewvector[2] = bound(mins[2], localvieworigin, maxs[2]) - model->terrain.vieworigin[2];
    if (stepsize > 1 && VectorLength(viewvector) < stepsize*model->terrain.scale[0]*r_terrain_lodscale.value)
    {
        // too close for this stepsize, emit as 4 chunks instead
        stepsize /= 2;
        Mod_Terrain_SurfaceRecurseChunk(model, stepsize, x, y);
        Mod_Terrain_SurfaceRecurseChunk(model, stepsize, x+stepsize, y);
        Mod_Terrain_SurfaceRecurseChunk(model, stepsize, x, y+stepsize);
        Mod_Terrain_SurfaceRecurseChunk(model, stepsize, x+stepsize, y+stepsize);
        return;
    }
    // emit the geometry at stepsize into our vertex buffer / index buffer
    // we add two columns and two rows for skirt
    outwidth = chunkwidth+2;
    outheight = chunkheight+2;
    outwidth2 = outwidth-1;
    outheight2 = outheight-1;
    outwidth3 = outwidth+1;
    outheight3 = outheight+1;
    firstvertex = numvertices;
    e = model->terrain.element3i + numtriangles;
    numtriangles += chunkwidth*chunkheight*2+chunkwidth*2*2+chunkheight*2*2;
    v = model->terrain.vertex3f + numvertices;
    numvertices += (chunkwidth+1)*(chunkheight+1)+(chunkwidth+1)*2+(chunkheight+1)*2;
    // emit the triangles (note: the skirt is treated as two extra rows and two extra columns)
    for (ty = 0;ty < outheight;ty++)
    {
        for (tx = 0;tx < outwidth;tx++)
        {
            *e++ = firstvertex + (ty  )*outwidth3+(tx  );
            *e++ = firstvertex + (ty  )*outwidth3+(tx+1);
            *e++ = firstvertex + (ty+1)*outwidth3+(tx+1);
            *e++ = firstvertex + (ty  )*outwidth3+(tx  );
            *e++ = firstvertex + (ty+1)*outwidth3+(tx+1);
            *e++ = firstvertex + (ty+1)*outwidth3+(tx  );
        }
    }
    // TODO: emit surface vertices (x+tx*stepsize, y+ty*stepsize)
    for (ty = 0;ty <= outheight;ty++)
    {
        skirtrow = ty == 0 || ty == outheight;
        ry = y+bound(1, ty, outheight)*stepsize;
        for (tx = 0;tx <= outwidth;tx++)
        {
            skirt = skirtrow || tx == 0 || tx == outwidth;
            rx = x+bound(1, tx, outwidth)*stepsize;
            v[0] = rx*scale[0];
            v[1] = ry*scale[1];
            v[2] = heightmap[ry*terrainwidth+rx]*scale[2];
            v += 3;
        }
    }
    // TODO: emit skirt vertices
}
 
void Mod_Terrain_UpdateSurfacesForViewOrigin(model_t *model)
{
    for (y = 0;y < model->terrain.size[1];y += model->terrain.
    Mod_Terrain_SurfaceRecurseChunk(model, model->terrain.maxstepsize, x, y);
    Mod_Terrain_BuildChunk(model, 
}
#endif
 
static int Mod_LoadQ3Shaders_EnumerateWaveFunc(const char *s)
{
    int offset = 0;
    if (!strncasecmp(s, "user", 4)) // parse stuff like "user1sin", always user<n>func
    {
        offset = bound(0, s[4] - '0', 9);
        offset = (offset + 1) << Q3WAVEFUNC_USER_SHIFT;
        s += 4;
        if(*s)
            ++s;
    }
    if (!strcasecmp(s, "sin"))             return offset | Q3WAVEFUNC_SIN;
    if (!strcasecmp(s, "square"))          return offset | Q3WAVEFUNC_SQUARE;
    if (!strcasecmp(s, "triangle"))        return offset | Q3WAVEFUNC_TRIANGLE;
    if (!strcasecmp(s, "sawtooth"))        return offset | Q3WAVEFUNC_SAWTOOTH;
    if (!strcasecmp(s, "inversesawtooth")) return offset | Q3WAVEFUNC_INVERSESAWTOOTH;
    if (!strcasecmp(s, "noise"))           return offset | Q3WAVEFUNC_NOISE;
    if (!strcasecmp(s, "none"))            return offset | Q3WAVEFUNC_NONE;
    Con_DPrintf("Mod_LoadQ3Shaders: unknown wavefunc %s\n", s);
    return offset | Q3WAVEFUNC_NONE;
}
 
void Mod_FreeQ3Shaders(void)
{
    Mem_FreePool(&q3shaders_mem);
}
 
static void Q3Shader_AddToHash (shader_t* shader)
{
    unsigned short hash = CRC_Block_CaseInsensitive ((const unsigned char *)shader->name, strlen (shader->name));
    q3shader_hash_entry_t* entry = q3shader_data->hash + (hash % Q3SHADER_HASH_SIZE);
    q3shader_hash_entry_t* lastEntry = NULL;
    do
    {
        if (strcasecmp (entry->shader.name, shader->name) == 0)
        {
            // redeclaration
            if(shader->dpshaderkill)
            {
                // killed shader is a redeclarion? we can safely ignore it
                return;
            }
            else if(entry->shader.dpshaderkill)
            {
                // replace the old shader!
                // this will skip the entry allocating part
                // below and just replace the shader
                break;
            }
            else
            {
                unsigned char *start, *end, *start2;
                start = (unsigned char *) (&shader->Q3SHADERINFO_COMPARE_START);
                end = ((unsigned char *) (&shader->Q3SHADERINFO_COMPARE_END)) + sizeof(shader->Q3SHADERINFO_COMPARE_END);
                start2 = (unsigned char *) (&entry->shader.Q3SHADERINFO_COMPARE_START);
                if(memcmp(start, start2, end - start))
                    Con_DPrintf("Shader '%s' already defined, ignoring mismatching redeclaration\n", shader->name);
                else
                    Con_DPrintf("Shader '%s' already defined\n", shader->name);
                return;
            }
        }
        lastEntry = entry;
        entry = entry->chain;
    }
    while (entry != NULL);
    if (entry == NULL)
    {
        if (lastEntry->shader.name[0] != 0)
        {
            /* Add to chain */
            q3shader_hash_entry_t* newEntry = (q3shader_hash_entry_t*)
              Mem_ExpandableArray_AllocRecord (&q3shader_data->hash_entries);
 
            while (lastEntry->chain != NULL) lastEntry = lastEntry->chain;
            lastEntry->chain = newEntry;
            newEntry->chain = NULL;
            lastEntry = newEntry;
        }
        /* else: head of chain, in hash entry array */
        entry = lastEntry;
    }
    memcpy (&entry->shader, shader, sizeof (shader_t));
}
 
void Mod_LoadQ3Shaders(void)
{
    int j;
    int fileindex;
    fssearch_t *search;
    char *f;
    const char *text;
    shader_t shader;
    q3shaderinfo_layer_t *layer;
    int numparameters;
    char parameter[TEXTURE_MAXFRAMES + 4][Q3PATHLENGTH];
    char *custsurfaceparmnames[256]; // VorteX: q3map2 has 64 but well, someone will need more
    unsigned long custsurfaceflags[256]; 
    int numcustsurfaceflags;
    qbool dpshaderkill;
 
    Mod_FreeQ3Shaders();
 
    q3shaders_mem = Mem_AllocPool("q3shaders", 0, NULL);
    q3shader_data = (q3shader_data_t*)Mem_Alloc (q3shaders_mem,
        sizeof (q3shader_data_t));
    Mem_ExpandableArray_NewArray (&q3shader_data->hash_entries,
        q3shaders_mem, sizeof (q3shader_hash_entry_t), 256);
    Mem_ExpandableArray_NewArray (&q3shader_data->char_ptrs,
        q3shaders_mem, sizeof (char**), 256);
 
    // parse custinfoparms.txt
    numcustsurfaceflags = 0;
    if ((text = f = (char *)FS_LoadFile("scripts/custinfoparms.txt", tempmempool, false, NULL)) != NULL)
    {
        if (!COM_ParseToken_QuakeC(&text, false) || strcasecmp(com_token, "{"))
            Con_DPrintf("scripts/custinfoparms.txt: contentflags section parsing error - expected \"{\", found \"%s\"\n", com_token);
        else
        {
            while (COM_ParseToken_QuakeC(&text, false))
                if (!strcasecmp(com_token, "}"))
                    break;
            // custom surfaceflags section
            if (!COM_ParseToken_QuakeC(&text, false) || strcasecmp(com_token, "{"))
                Con_DPrintf("scripts/custinfoparms.txt: surfaceflags section parsing error - expected \"{\", found \"%s\"\n", com_token);
            else
            {
                while(COM_ParseToken_QuakeC(&text, false))
                {
                    if (!strcasecmp(com_token, "}"))
                        break;  
                    // register surfaceflag
                    if (numcustsurfaceflags >= 256)
                    {
                        Con_Printf("scripts/custinfoparms.txt: surfaceflags section parsing error - max 256 surfaceflags exceeded\n");
                        break;
                    }
                    // name
                    j = (int)strlen(com_token)+1;
                    custsurfaceparmnames[numcustsurfaceflags] = (char *)Mem_Alloc(tempmempool, j);
                    dp_strlcpy(custsurfaceparmnames[numcustsurfaceflags], com_token, j+1);
                    // value
                    if (COM_ParseToken_QuakeC(&text, false))
                        custsurfaceflags[numcustsurfaceflags] = strtol(com_token, NULL, 0);
                    else
                        custsurfaceflags[numcustsurfaceflags] = 0;
                    numcustsurfaceflags++;
                }
            }
        }
        Mem_Free(f);
    }
 
    // parse shaders
    search = FS_Search("scripts/*.shader", true, false, NULL);
    if (!search)
        return;
    for (fileindex = 0;fileindex < search->numfilenames;fileindex++)
    {
        text = f = (char *)FS_LoadFile(search->filenames[fileindex], tempmempool, false, NULL);
        if (!f)
            continue;
        while (COM_ParseToken_QuakeC(&text, false))
        {
            memset (&shader, 0, sizeof(shader));
            shader.name[0] = 0;
            shader.surfaceparms = 0;
            shader.surfaceflags = 0;
            shader.textureflags = 0;
            shader.numlayers = 0;
            shader.lighting = false;
            shader.vertexalpha = false;
            shader.textureblendalpha = false;
            shader.skyboxname[0] = 0;
            shader.deforms[0].deform = Q3DEFORM_NONE;
            shader.dpnortlight = false;
            shader.dpshadow = false;
            shader.dpnoshadow = false;
            shader.dpmeshcollisions = false;
            shader.dpshaderkill = false;
            shader.dpreflectcube[0] = 0;
            shader.reflectmin = 0;
            shader.reflectmax = 1;
            shader.refractfactor = 1;
            Vector4Set(shader.refractcolor4f, 1, 1, 1, 1);
            shader.reflectfactor = 1;
            Vector4Set(shader.reflectcolor4f, 1, 1, 1, 1);
            shader.r_water_wateralpha = 1;
            shader.r_water_waterscroll[0] = 0;
            shader.r_water_waterscroll[1] = 0;
            shader.offsetmapping = (mod_q3shader_default_offsetmapping.value) ? OFFSETMAPPING_DEFAULT : OFFSETMAPPING_OFF;
            shader.offsetscale = mod_q3shader_default_offsetmapping_scale.value;
            shader.offsetbias = mod_q3shader_default_offsetmapping_bias.value;
            shader.biaspolygonoffset = mod_q3shader_default_polygonoffset.value;
            shader.biaspolygonfactor = mod_q3shader_default_polygonfactor.value;
            shader.transparentsort = TRANSPARENTSORT_DISTANCE;
            shader.specularscalemod = 1;
            shader.specularpowermod = 1;
            shader.rtlightambient = 0;
            // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
            // JUST GREP FOR "specularscalemod = 1".
 
            dp_strlcpy(shader.name, com_token, sizeof(shader.name));
            if (!COM_ParseToken_QuakeC(&text, false) || strcasecmp(com_token, "{"))
            {
                Con_DPrintf("%s parsing error - expected \"{\", found \"%s\"\n", search->filenames[fileindex], com_token);
                break;
            }
            while (COM_ParseToken_QuakeC(&text, false))
            {
                if (!strcasecmp(com_token, "}"))
                    break;
                if (!strcasecmp(com_token, "{"))
                {
                    static q3shaderinfo_layer_t dummy;
                    if (shader.numlayers < Q3SHADER_MAXLAYERS)
                    {
                        layer = shader.layers + shader.numlayers++;
                    }
                    else
                    {
                        // parse and process it anyway, just don't store it (so a map $lightmap or such stuff still is found)
                        memset(&dummy, 0, sizeof(dummy));
                        layer = &dummy;
                    }
                    layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITY;
                    layer->alphagen.alphagen = Q3ALPHAGEN_IDENTITY;
                    layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
                    layer->blendfunc[0] = GL_ONE;
                    layer->blendfunc[1] = GL_ZERO;
                    while (COM_ParseToken_QuakeC(&text, false))
                    {
                        if (!strcasecmp(com_token, "}"))
                            break;
                        if (!strcasecmp(com_token, "\n"))
                            continue;
                        numparameters = 0;
                        for (j = 0;strcasecmp(com_token, "\n") && strcasecmp(com_token, "}");j++)
                        {
                            if (j < TEXTURE_MAXFRAMES + 4)
                            {
                                // remap dp_water to dpwater, dp_reflect to dpreflect, etc.
                                if(j == 0 && !strncasecmp(com_token, "dp_", 3))
                                    dpsnprintf(parameter[j], sizeof(parameter[j]), "dp%s", &com_token[3]);
                                else
                                    dp_strlcpy(parameter[j], com_token, sizeof(parameter[j]));
                                numparameters = j + 1;
                            }
                            if (!COM_ParseToken_QuakeC(&text, true))
                                break;
                        }
                        //for (j = numparameters;j < TEXTURE_MAXFRAMES + 4;j++)
                        //  parameter[j][0] = 0;
                        if (developer_insane.integer)
                        {
                            Con_DPrintf("%s %i: ", shader.name, shader.numlayers - 1);
                            for (j = 0;j < numparameters;j++)
                                Con_DPrintf(" %s", parameter[j]);
                            Con_DPrint("\n");
                        }
                        if (numparameters >= 2 && !strcasecmp(parameter[0], "blendfunc"))
                        {
                            if (numparameters == 2)
                            {
                                if (!strcasecmp(parameter[1], "add"))
                                {
                                    layer->blendfunc[0] = GL_ONE;
                                    layer->blendfunc[1] = GL_ONE;
                                }
                                else if (!strcasecmp(parameter[1], "addalpha"))
                                {
                                    layer->blendfunc[0] = GL_SRC_ALPHA;
                                    layer->blendfunc[1] = GL_ONE;
                                }
                                else if (!strcasecmp(parameter[1], "filter"))
                                {
                                    layer->blendfunc[0] = GL_DST_COLOR;
                                    layer->blendfunc[1] = GL_ZERO;
                                }
                                else if (!strcasecmp(parameter[1], "blend"))
                                {
                                    layer->blendfunc[0] = GL_SRC_ALPHA;
                                    layer->blendfunc[1] = GL_ONE_MINUS_SRC_ALPHA;
                                }
                            }
                            else if (numparameters == 3)
                            {
                                int k;
                                for (k = 0;k < 2;k++)
                                {
                                    if (!strcasecmp(parameter[k+1], "GL_ONE"))
                                        layer->blendfunc[k] = GL_ONE;
                                    else if (!strcasecmp(parameter[k+1], "GL_ZERO"))
                                        layer->blendfunc[k] = GL_ZERO;
                                    else if (!strcasecmp(parameter[k+1], "GL_SRC_COLOR"))
                                        layer->blendfunc[k] = GL_SRC_COLOR;
                                    else if (!strcasecmp(parameter[k+1], "GL_SRC_ALPHA"))
                                        layer->blendfunc[k] = GL_SRC_ALPHA;
                                    else if (!strcasecmp(parameter[k+1], "GL_DST_COLOR"))
                                        layer->blendfunc[k] = GL_DST_COLOR;
                                    else if (!strcasecmp(parameter[k+1], "GL_DST_ALPHA"))
                                        layer->blendfunc[k] = GL_DST_ALPHA;
                                    else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_SRC_COLOR"))
                                        layer->blendfunc[k] = GL_ONE_MINUS_SRC_COLOR;
                                    else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_SRC_ALPHA"))
                                        layer->blendfunc[k] = GL_ONE_MINUS_SRC_ALPHA;
                                    else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_DST_COLOR"))
                                        layer->blendfunc[k] = GL_ONE_MINUS_DST_COLOR;
                                    else if (!strcasecmp(parameter[k+1], "GL_ONE_MINUS_DST_ALPHA"))
                                        layer->blendfunc[k] = GL_ONE_MINUS_DST_ALPHA;
                                    else
                                        layer->blendfunc[k] = GL_ONE; // default in case of parsing error
                                }
                            }
                        }
                        if (numparameters >= 2 && !strcasecmp(parameter[0], "alphafunc"))
                            layer->alphatest = true;
                        if (numparameters >= 2 && (!strcasecmp(parameter[0], "map") || !strcasecmp(parameter[0], "clampmap")))
                        {
                            if (!strcasecmp(parameter[0], "clampmap"))
                                layer->clampmap = true;
                            layer->numframes = 1;
                            layer->framerate = 1;
                            layer->texturename = (char**)Mem_ExpandableArray_AllocRecord (
                                &q3shader_data->char_ptrs);
                            layer->texturename[0] = Mem_strdup (q3shaders_mem, parameter[1]);
                            if (!strcasecmp(parameter[1], "$lightmap"))
                                shader.lighting = true;
                        }
                        else if (numparameters >= 3 && (!strcasecmp(parameter[0], "animmap") || !strcasecmp(parameter[0], "animclampmap")))
                        {
                            int i;
                            layer->numframes = min(numparameters - 2, TEXTURE_MAXFRAMES);
                            layer->framerate = atof(parameter[1]);
                            layer->texturename = (char **) Mem_Alloc (q3shaders_mem, sizeof (char*) * layer->numframes);
                            for (i = 0;i < layer->numframes;i++)
                                layer->texturename[i] = Mem_strdup (q3shaders_mem, parameter[i + 2]);
                        }
                        else if (numparameters >= 2 && !strcasecmp(parameter[0], "rgbgen"))
                        {
                            int i;
                            for (i = 0;i < numparameters - 2 && i < Q3RGBGEN_MAXPARMS;i++)
                                layer->rgbgen.parms[i] = atof(parameter[i+2]);
                                 if (!strcasecmp(parameter[1], "identity"))         layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITY;
                            else if (!strcasecmp(parameter[1], "const"))            layer->rgbgen.rgbgen = Q3RGBGEN_CONST;
                            else if (!strcasecmp(parameter[1], "entity"))           layer->rgbgen.rgbgen = Q3RGBGEN_ENTITY;
                            else if (!strcasecmp(parameter[1], "exactvertex"))      layer->rgbgen.rgbgen = Q3RGBGEN_EXACTVERTEX;
                            else if (!strcasecmp(parameter[1], "identitylighting")) layer->rgbgen.rgbgen = Q3RGBGEN_IDENTITYLIGHTING;
                            else if (!strcasecmp(parameter[1], "lightingdiffuse"))  layer->rgbgen.rgbgen = Q3RGBGEN_LIGHTINGDIFFUSE;
                            else if (!strcasecmp(parameter[1], "oneminusentity"))   layer->rgbgen.rgbgen = Q3RGBGEN_ONEMINUSENTITY;
                            else if (!strcasecmp(parameter[1], "oneminusvertex"))   layer->rgbgen.rgbgen = Q3RGBGEN_ONEMINUSVERTEX;
                            else if (!strcasecmp(parameter[1], "vertex"))           layer->rgbgen.rgbgen = Q3RGBGEN_VERTEX;
                            else if (!strcasecmp(parameter[1], "wave"))
                            {
                                layer->rgbgen.rgbgen = Q3RGBGEN_WAVE;
                                layer->rgbgen.wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
                                for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
                                    layer->rgbgen.waveparms[i] = atof(parameter[i+3]);
                            }
                            else Con_DPrintf("%s parsing warning: unknown rgbgen %s\n", search->filenames[fileindex], parameter[1]);
                        }
                        else if (numparameters >= 2 && !strcasecmp(parameter[0], "alphagen"))
                        {
                            int i;
                            for (i = 0;i < numparameters - 2 && i < Q3ALPHAGEN_MAXPARMS;i++)
                                layer->alphagen.parms[i] = atof(parameter[i+2]);
                                 if (!strcasecmp(parameter[1], "identity"))         layer->alphagen.alphagen = Q3ALPHAGEN_IDENTITY;
                            else if (!strcasecmp(parameter[1], "const"))            layer->alphagen.alphagen = Q3ALPHAGEN_CONST;
                            else if (!strcasecmp(parameter[1], "entity"))           layer->alphagen.alphagen = Q3ALPHAGEN_ENTITY;
                            else if (!strcasecmp(parameter[1], "lightingspecular")) layer->alphagen.alphagen = Q3ALPHAGEN_LIGHTINGSPECULAR;
                            else if (!strcasecmp(parameter[1], "oneminusentity"))   layer->alphagen.alphagen = Q3ALPHAGEN_ONEMINUSENTITY;
                            else if (!strcasecmp(parameter[1], "oneminusvertex"))   layer->alphagen.alphagen = Q3ALPHAGEN_ONEMINUSVERTEX;
                            else if (!strcasecmp(parameter[1], "portal"))           layer->alphagen.alphagen = Q3ALPHAGEN_PORTAL;
                            else if (!strcasecmp(parameter[1], "vertex"))           layer->alphagen.alphagen = Q3ALPHAGEN_VERTEX;
                            else if (!strcasecmp(parameter[1], "wave"))
                            {
                                layer->alphagen.alphagen = Q3ALPHAGEN_WAVE;
                                layer->alphagen.wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
                                for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
                                    layer->alphagen.waveparms[i] = atof(parameter[i+3]);
                            }
                            else Con_DPrintf("%s parsing warning: unknown alphagen %s\n", search->filenames[fileindex], parameter[1]);
                        }
                        else if (numparameters >= 2 && (!strcasecmp(parameter[0], "texgen") || !strcasecmp(parameter[0], "tcgen")))
                        {
                            int i;
                            // observed values: tcgen environment
                            // no other values have been observed in real shaders
                            for (i = 0;i < numparameters - 2 && i < Q3TCGEN_MAXPARMS;i++)
                                layer->tcgen.parms[i] = atof(parameter[i+2]);
                                 if (!strcasecmp(parameter[1], "base"))        layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
                            else if (!strcasecmp(parameter[1], "texture"))     layer->tcgen.tcgen = Q3TCGEN_TEXTURE;
                            else if (!strcasecmp(parameter[1], "environment")) layer->tcgen.tcgen = Q3TCGEN_ENVIRONMENT;
                            else if (!strcasecmp(parameter[1], "lightmap"))    layer->tcgen.tcgen = Q3TCGEN_LIGHTMAP;
                            else if (!strcasecmp(parameter[1], "vector"))      layer->tcgen.tcgen = Q3TCGEN_VECTOR;
                            else Con_DPrintf("%s parsing warning: unknown tcgen mode %s\n", search->filenames[fileindex], parameter[1]);
                        }
                        else if (numparameters >= 2 && !strcasecmp(parameter[0], "tcmod"))
                        {
                            int i, tcmodindex;
                            // observed values:
                            // tcmod rotate #
                            // tcmod scale # #
                            // tcmod scroll # #
                            // tcmod stretch sin # # # #
                            // tcmod stretch triangle # # # #
                            // tcmod transform # # # # # #
                            // tcmod turb # # # #
                            // tcmod turb sin # # # #  (this is bogus)
                            // no other values have been observed in real shaders
                            for (tcmodindex = 0;tcmodindex < Q3MAXTCMODS;tcmodindex++)
                                if (!layer->tcmods[tcmodindex].tcmod)
                                    break;
                            if (tcmodindex < Q3MAXTCMODS)
                            {
                                for (i = 0;i < numparameters - 2 && i < Q3TCMOD_MAXPARMS;i++)
                                    layer->tcmods[tcmodindex].parms[i] = atof(parameter[i+2]);
                                     if (!strcasecmp(parameter[1], "entitytranslate")) layer->tcmods[tcmodindex].tcmod = Q3TCMOD_ENTITYTRANSLATE;
                                else if (!strcasecmp(parameter[1], "rotate"))          layer->tcmods[tcmodindex].tcmod = Q3TCMOD_ROTATE;
                                else if (!strcasecmp(parameter[1], "scale"))           layer->tcmods[tcmodindex].tcmod = Q3TCMOD_SCALE;
                                else if (!strcasecmp(parameter[1], "scroll"))          layer->tcmods[tcmodindex].tcmod = Q3TCMOD_SCROLL;
                                else if (!strcasecmp(parameter[1], "page"))            layer->tcmods[tcmodindex].tcmod = Q3TCMOD_PAGE;
                                else if (!strcasecmp(parameter[1], "stretch"))
                                {
                                    layer->tcmods[tcmodindex].tcmod = Q3TCMOD_STRETCH;
                                    layer->tcmods[tcmodindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[2]);
                                    for (i = 0;i < numparameters - 3 && i < Q3WAVEPARMS;i++)
                                        layer->tcmods[tcmodindex].waveparms[i] = atof(parameter[i+3]);
                                }
                                else if (!strcasecmp(parameter[1], "transform"))       layer->tcmods[tcmodindex].tcmod = Q3TCMOD_TRANSFORM;
                                else if (!strcasecmp(parameter[1], "turb"))            layer->tcmods[tcmodindex].tcmod = Q3TCMOD_TURBULENT;
                                else Con_DPrintf("%s parsing warning: unknown tcmod mode %s\n", search->filenames[fileindex], parameter[1]);
                            }
                            else
                                Con_DPrintf("%s parsing warning: too many tcmods on one layer\n", search->filenames[fileindex]);
                        }
                        // break out a level if it was a closing brace (not using the character here to not confuse vim)
                        if (!strcasecmp(com_token, "}"))
                            break;
                    }
                    if (layer->rgbgen.rgbgen == Q3RGBGEN_LIGHTINGDIFFUSE || layer->rgbgen.rgbgen == Q3RGBGEN_VERTEX)
                        shader.lighting = true;
                    if (layer->alphagen.alphagen == Q3ALPHAGEN_VERTEX)
                    {
                        if (layer == shader.layers + 0)
                        {
                            // vertex controlled transparency
                            shader.vertexalpha = true;
                        }
                        else
                        {
                            // multilayer terrain shader or similar
                            shader.textureblendalpha = true;
                            if (mod_q3shader_force_terrain_alphaflag.integer)
                                shader.layers[0].dptexflags |= TEXF_ALPHA;
                        }
                    }
 
                    if(mod_q3shader_force_addalpha.integer)
                    {
                        // for a long while, DP treated GL_ONE GL_ONE as GL_SRC_ALPHA GL_ONE
                        // this cvar brings back this behaviour
                        if(layer->blendfunc[0] == GL_ONE && layer->blendfunc[1] == GL_ONE)
                            layer->blendfunc[0] = GL_SRC_ALPHA;
                    }
                    
                    layer->dptexflags = 0;
                    if (layer->alphatest)
                        layer->dptexflags |= TEXF_ALPHA;
                    switch(layer->blendfunc[0])
                    {
                        case GL_SRC_ALPHA:
                        case GL_ONE_MINUS_SRC_ALPHA:
                            layer->dptexflags |= TEXF_ALPHA;
                            break;
                    }
                    switch(layer->blendfunc[1])
                    {
                        case GL_SRC_ALPHA:
                        case GL_ONE_MINUS_SRC_ALPHA:
                            layer->dptexflags |= TEXF_ALPHA;
                            break;
                    }
                    if (!(shader.surfaceparms & Q3SURFACEPARM_NOMIPMAPS))
                        layer->dptexflags |= TEXF_MIPMAP;
                    if (!(shader.textureflags & Q3TEXTUREFLAG_NOPICMIP))
                        layer->dptexflags |= TEXF_PICMIP | TEXF_COMPRESS;
                    if (layer->clampmap)
                        layer->dptexflags |= TEXF_CLAMP;
                    continue;
                }
                numparameters = 0;
                for (j = 0;strcasecmp(com_token, "\n") && strcasecmp(com_token, "}");j++)
                {
                    if (j < TEXTURE_MAXFRAMES + 4)
                    {
                        // remap dp_water to dpwater, dp_reflect to dpreflect, etc.
                        if(j == 0 && !strncasecmp(com_token, "dp_", 3))
                            dpsnprintf(parameter[j], sizeof(parameter[j]), "dp%s", &com_token[3]);
                        else
                            dp_strlcpy(parameter[j], com_token, sizeof(parameter[j]));
                        numparameters = j + 1;
                    }
                    if (!COM_ParseToken_QuakeC(&text, true))
                        break;
                }
                //for (j = numparameters;j < TEXTURE_MAXFRAMES + 4;j++)
                //  parameter[j][0] = 0;
                if (fileindex == 0 && !strcasecmp(com_token, "}"))
                    break;
                if (developer_insane.integer)
                {
                    Con_DPrintf("%s: ", shader.name);
                    for (j = 0;j < numparameters;j++)
                        Con_DPrintf(" %s", parameter[j]);
                    Con_DPrint("\n");
                }
                if (numparameters < 1)
                    continue;
                if (!strcasecmp(parameter[0], "surfaceparm") && numparameters >= 2)
                {
                    if (!strcasecmp(parameter[1], "alphashadow"))
                        shader.surfaceparms |= Q3SURFACEPARM_ALPHASHADOW;
                    else if (!strcasecmp(parameter[1], "areaportal"))
                        shader.surfaceparms |= Q3SURFACEPARM_AREAPORTAL;
                    else if (!strcasecmp(parameter[1], "botclip"))
                        shader.surfaceparms |= Q3SURFACEPARM_BOTCLIP;
                    else if (!strcasecmp(parameter[1], "clusterportal"))
                        shader.surfaceparms |= Q3SURFACEPARM_CLUSTERPORTAL;
                    else if (!strcasecmp(parameter[1], "detail"))
                        shader.surfaceparms |= Q3SURFACEPARM_DETAIL;
                    else if (!strcasecmp(parameter[1], "donotenter"))
                        shader.surfaceparms |= Q3SURFACEPARM_DONOTENTER;
                    else if (!strcasecmp(parameter[1], "dust"))
                        shader.surfaceparms |= Q3SURFACEPARM_DUST;
                    else if (!strcasecmp(parameter[1], "hint"))
                        shader.surfaceparms |= Q3SURFACEPARM_HINT;
                    else if (!strcasecmp(parameter[1], "fog"))
                        shader.surfaceparms |= Q3SURFACEPARM_FOG;
                    else if (!strcasecmp(parameter[1], "lava"))
                        shader.surfaceparms |= Q3SURFACEPARM_LAVA;
                    else if (!strcasecmp(parameter[1], "lightfilter"))
                        shader.surfaceparms |= Q3SURFACEPARM_LIGHTFILTER;
                    else if (!strcasecmp(parameter[1], "lightgrid"))
                        shader.surfaceparms |= Q3SURFACEPARM_LIGHTGRID;
                    else if (!strcasecmp(parameter[1], "metalsteps"))
                        shader.surfaceparms |= Q3SURFACEPARM_METALSTEPS;
                    else if (!strcasecmp(parameter[1], "nodamage"))
                        shader.surfaceparms |= Q3SURFACEPARM_NODAMAGE;
                    else if (!strcasecmp(parameter[1], "nodlight"))
                        shader.surfaceparms |= Q3SURFACEPARM_NODLIGHT;
                    else if (!strcasecmp(parameter[1], "nodraw"))
                        shader.surfaceparms |= Q3SURFACEPARM_NODRAW;
                    else if (!strcasecmp(parameter[1], "nodrop"))
                        shader.surfaceparms |= Q3SURFACEPARM_NODROP;
                    else if (!strcasecmp(parameter[1], "noimpact"))
                        shader.surfaceparms |= Q3SURFACEPARM_NOIMPACT;
                    else if (!strcasecmp(parameter[1], "nolightmap"))
                        shader.surfaceparms |= Q3SURFACEPARM_NOLIGHTMAP;
                    else if (!strcasecmp(parameter[1], "nomarks"))
                        shader.surfaceparms |= Q3SURFACEPARM_NOMARKS;
                    else if (!strcasecmp(parameter[1], "nomipmaps"))
                        shader.surfaceparms |= Q3SURFACEPARM_NOMIPMAPS;
                    else if (!strcasecmp(parameter[1], "nonsolid"))
                        shader.surfaceparms |= Q3SURFACEPARM_NONSOLID;
                    else if (!strcasecmp(parameter[1], "origin"))
                        shader.surfaceparms |= Q3SURFACEPARM_ORIGIN;
                    else if (!strcasecmp(parameter[1], "playerclip"))
                        shader.surfaceparms |= Q3SURFACEPARM_PLAYERCLIP;
                    else if (!strcasecmp(parameter[1], "sky"))
                        shader.surfaceparms |= Q3SURFACEPARM_SKY;
                    else if (!strcasecmp(parameter[1], "slick"))
                        shader.surfaceparms |= Q3SURFACEPARM_SLICK;
                    else if (!strcasecmp(parameter[1], "slime"))
                        shader.surfaceparms |= Q3SURFACEPARM_SLIME;
                    else if (!strcasecmp(parameter[1], "structural"))
                        shader.surfaceparms |= Q3SURFACEPARM_STRUCTURAL;
                    else if (!strcasecmp(parameter[1], "trans"))
                        shader.surfaceparms |= Q3SURFACEPARM_TRANS;
                    else if (!strcasecmp(parameter[1], "water"))
                        shader.surfaceparms |= Q3SURFACEPARM_WATER;
                    else if (!strcasecmp(parameter[1], "pointlight"))
                        shader.surfaceparms |= Q3SURFACEPARM_POINTLIGHT;
                    else if (!strcasecmp(parameter[1], "antiportal"))
                        shader.surfaceparms |= Q3SURFACEPARM_ANTIPORTAL;
                    else if (!strcasecmp(parameter[1], "skip"))
                        ; // shader.surfaceparms |= Q3SURFACEPARM_SKIP; FIXME we don't have enough #defines for this any more, and the engine doesn't need this one anyway
                    else
                    {
                        // try custom surfaceparms
                        for (j = 0; j < numcustsurfaceflags; j++)
                        {
                            if (!strcasecmp(custsurfaceparmnames[j], parameter[1]))
                            {
                                shader.surfaceflags |= custsurfaceflags[j];
                                break;
                            }
                        }
                        // failed all
                        if (j == numcustsurfaceflags)
                            Con_DPrintf("%s parsing warning: unknown surfaceparm \"%s\"\n", search->filenames[fileindex], parameter[1]);
                    }
                }
                else if (!strcasecmp(parameter[0], "dpshadow"))
                    shader.dpshadow = true;
                else if (!strcasecmp(parameter[0], "dpnoshadow"))
                    shader.dpnoshadow = true;
                else if (!strcasecmp(parameter[0], "dpnortlight"))
                    shader.dpnortlight = true;
                else if (!strcasecmp(parameter[0], "dpreflectcube"))
                    dp_strlcpy(shader.dpreflectcube, parameter[1], sizeof(shader.dpreflectcube));
                else if (!strcasecmp(parameter[0], "dpmeshcollisions"))
                    shader.dpmeshcollisions = true;
                // this sets dpshaderkill to true if dpshaderkillifcvarzero was used, and to false if dpnoshaderkillifcvarzero was used
                else if (((dpshaderkill = !strcasecmp(parameter[0], "dpshaderkillifcvarzero")) || !strcasecmp(parameter[0], "dpnoshaderkillifcvarzero")) && numparameters >= 2)
                {
                    if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) == 0.0f)
                        shader.dpshaderkill = dpshaderkill;
                }
                // this sets dpshaderkill to true if dpshaderkillifcvar was used, and to false if dpnoshaderkillifcvar was used
                else if (((dpshaderkill = !strcasecmp(parameter[0], "dpshaderkillifcvar")) || !strcasecmp(parameter[0], "dpnoshaderkillifcvar")) && numparameters >= 2)
                {
                    const char *op = NULL;
                    if (numparameters >= 3)
                        op = parameter[2];
                    if(!op)
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) != 0.0f)
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, "=="))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) == atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, "!="))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) != atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, ">"))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) > atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, "<"))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) < atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, ">="))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) >= atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else if (numparameters >= 4 && !strcmp(op, "<="))
                    {
                        if (Cvar_VariableValue(&cvars_all, parameter[1], ~0) <= atof(parameter[3]))
                            shader.dpshaderkill = dpshaderkill;
                    }
                    else
                    {
                        Con_DPrintf("%s parsing warning: unknown dpshaderkillifcvar op \"%s\", or not enough arguments\n", search->filenames[fileindex], op);
                    }
                }
                else if (!strcasecmp(parameter[0], "sky") && numparameters >= 2)
                {
                    // some q3 skies don't have the sky parm set
                    shader.surfaceparms |= Q3SURFACEPARM_SKY;
                    dp_strlcpy(shader.skyboxname, parameter[1], sizeof(shader.skyboxname));
                }
                else if (!strcasecmp(parameter[0], "skyparms") && numparameters >= 2)
                {
                    // some q3 skies don't have the sky parm set
                    shader.surfaceparms |= Q3SURFACEPARM_SKY;
                    if (!atoi(parameter[1]) && strcasecmp(parameter[1], "-"))
                        dp_strlcpy(shader.skyboxname, parameter[1], sizeof(shader.skyboxname));
                }
                else if (!strcasecmp(parameter[0], "cull") && numparameters >= 2)
                {
                    if (!strcasecmp(parameter[1], "disable") || !strcasecmp(parameter[1], "none") || !strcasecmp(parameter[1], "twosided"))
                        shader.textureflags |= Q3TEXTUREFLAG_TWOSIDED;
                }
                else if (!strcasecmp(parameter[0], "nomipmaps"))
                    shader.surfaceparms |= Q3SURFACEPARM_NOMIPMAPS;
                else if (!strcasecmp(parameter[0], "nopicmip"))
                    shader.textureflags |= Q3TEXTUREFLAG_NOPICMIP;
                else if (!strcasecmp(parameter[0], "polygonoffset"))
                    shader.textureflags |= Q3TEXTUREFLAG_POLYGONOFFSET;
                else if (!strcasecmp(parameter[0], "dppolygonoffset"))
                {
                    shader.textureflags |= Q3TEXTUREFLAG_POLYGONOFFSET;
                    if(numparameters >= 2)
                    {
                        shader.biaspolygonfactor = atof(parameter[1]);
                        if(numparameters >= 3)
                            shader.biaspolygonoffset = atof(parameter[2]);
                        else
                            shader.biaspolygonoffset = 0;
                    }
                }
                else if (!strcasecmp(parameter[0], "dptransparentsort") && numparameters >= 2)
                {
                    shader.textureflags |= Q3TEXTUREFLAG_TRANSPARENTSORT;
                    if (!strcasecmp(parameter[1], "sky"))
                        shader.transparentsort = TRANSPARENTSORT_SKY;
                    else if (!strcasecmp(parameter[1], "distance"))
                        shader.transparentsort = TRANSPARENTSORT_DISTANCE;
                    else if (!strcasecmp(parameter[1], "hud"))
                        shader.transparentsort = TRANSPARENTSORT_HUD;
                    else
                        Con_DPrintf("%s parsing warning: unknown dptransparentsort category \"%s\", or not enough arguments\n", search->filenames[fileindex], parameter[1]);
                }
                else if (!strcasecmp(parameter[0], "dprefract") && numparameters >= 5)
                {
                    shader.textureflags |= Q3TEXTUREFLAG_REFRACTION;
                    shader.refractfactor = atof(parameter[1]);
                    Vector4Set(shader.refractcolor4f, atof(parameter[2]), atof(parameter[3]), atof(parameter[4]), 1);
                }
                else if (!strcasecmp(parameter[0], "dpreflect") && numparameters >= 6)
                {
                    shader.textureflags |= Q3TEXTUREFLAG_REFLECTION;
                    shader.reflectfactor = atof(parameter[1]);
                    Vector4Set(shader.reflectcolor4f, atof(parameter[2]), atof(parameter[3]), atof(parameter[4]), atof(parameter[5]));
                }
                else if (!strcasecmp(parameter[0], "dpcamera"))
                {
                    shader.textureflags |= Q3TEXTUREFLAG_CAMERA;
                }
                else if (!strcasecmp(parameter[0], "dpwater") && numparameters >= 12)
                {
                    shader.textureflags |= Q3TEXTUREFLAG_WATERSHADER;
                    shader.reflectmin = atof(parameter[1]);
                    shader.reflectmax = atof(parameter[2]);
                    shader.refractfactor = atof(parameter[3]);
                    shader.reflectfactor = atof(parameter[4]);
                    Vector4Set(shader.refractcolor4f, atof(parameter[5]), atof(parameter[6]), atof(parameter[7]), 1);
                    Vector4Set(shader.reflectcolor4f, atof(parameter[8]), atof(parameter[9]), atof(parameter[10]), 1);
                    shader.r_water_wateralpha = atof(parameter[11]);
                }
                else if (!strcasecmp(parameter[0], "dpwaterscroll") && numparameters >= 3)
                {
                    shader.r_water_waterscroll[0] = 1/atof(parameter[1]);
                    shader.r_water_waterscroll[1] = 1/atof(parameter[2]);
                }
                else if (!strcasecmp(parameter[0], "dpglossintensitymod") && numparameters >= 2)
                {
                    shader.specularscalemod = atof(parameter[1]);
                }
                else if (!strcasecmp(parameter[0], "dpglossexponentmod") && numparameters >= 2)
                {
                    shader.specularpowermod = atof(parameter[1]);
                }
                else if (!strcasecmp(parameter[0], "dprtlightambient") && numparameters >= 2)
                {
                    shader.rtlightambient = atof(parameter[1]);
                }
                else if (!strcasecmp(parameter[0], "dpoffsetmapping") && numparameters >= 2)
                {
                    if (!strcasecmp(parameter[1], "disable") || !strcasecmp(parameter[1], "none") || !strcasecmp(parameter[1], "off"))
                        shader.offsetmapping = OFFSETMAPPING_OFF;
                    else if (!strcasecmp(parameter[1], "default") || !strcasecmp(parameter[1], "normal"))
                        shader.offsetmapping = OFFSETMAPPING_DEFAULT;
                    else if (!strcasecmp(parameter[1], "linear"))
                        shader.offsetmapping = OFFSETMAPPING_LINEAR;
                    else if (!strcasecmp(parameter[1], "relief"))
                        shader.offsetmapping = OFFSETMAPPING_RELIEF;
                    if (numparameters >= 3)
                        shader.offsetscale = atof(parameter[2]);
                    if (numparameters >= 5)
                    {
                        if(!strcasecmp(parameter[3], "bias"))
                            shader.offsetbias = atof(parameter[4]);
                        else if(!strcasecmp(parameter[3], "match"))
                            shader.offsetbias = 1.0f - atof(parameter[4]);
                        else if(!strcasecmp(parameter[3], "match8"))
                            shader.offsetbias = 1.0f - atof(parameter[4]) / 255.0f;
                        else if(!strcasecmp(parameter[3], "match16"))
                            shader.offsetbias = 1.0f - atof(parameter[4]) / 65535.0f;
                    }
                }
                else if (!strcasecmp(parameter[0], "deformvertexes") && numparameters >= 2)
                {
                    int i, deformindex;
                    for (deformindex = 0;deformindex < Q3MAXDEFORMS;deformindex++)
                        if (!shader.deforms[deformindex].deform)
                            break;
                    if (deformindex < Q3MAXDEFORMS)
                    {
                        for (i = 0;i < numparameters - 2 && i < Q3DEFORM_MAXPARMS;i++)
                            shader.deforms[deformindex].parms[i] = atof(parameter[i+2]);
                             if (!strcasecmp(parameter[1], "projectionshadow")) shader.deforms[deformindex].deform = Q3DEFORM_PROJECTIONSHADOW;
                        else if (!strcasecmp(parameter[1], "autosprite"      )) shader.deforms[deformindex].deform = Q3DEFORM_AUTOSPRITE;
                        else if (!strcasecmp(parameter[1], "autosprite2"     )) shader.deforms[deformindex].deform = Q3DEFORM_AUTOSPRITE2;
                        else if (!strcasecmp(parameter[1], "text0"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT0;
                        else if (!strcasecmp(parameter[1], "text1"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT1;
                        else if (!strcasecmp(parameter[1], "text2"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT2;
                        else if (!strcasecmp(parameter[1], "text3"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT3;
                        else if (!strcasecmp(parameter[1], "text4"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT4;
                        else if (!strcasecmp(parameter[1], "text5"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT5;
                        else if (!strcasecmp(parameter[1], "text6"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT6;
                        else if (!strcasecmp(parameter[1], "text7"           )) shader.deforms[deformindex].deform = Q3DEFORM_TEXT7;
                        else if (!strcasecmp(parameter[1], "bulge"           )) shader.deforms[deformindex].deform = Q3DEFORM_BULGE;
                        else if (!strcasecmp(parameter[1], "normal"          )) shader.deforms[deformindex].deform = Q3DEFORM_NORMAL;
                        else if (!strcasecmp(parameter[1], "wave"            ))
                        {
                            shader.deforms[deformindex].deform = Q3DEFORM_WAVE;
                            shader.deforms[deformindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[3]);
                            for (i = 0;i < numparameters - 4 && i < Q3WAVEPARMS;i++)
                                shader.deforms[deformindex].waveparms[i] = atof(parameter[i+4]);
                        }
                        else if (!strcasecmp(parameter[1], "move"            ))
                        {
                            shader.deforms[deformindex].deform = Q3DEFORM_MOVE;
                            shader.deforms[deformindex].wavefunc = Mod_LoadQ3Shaders_EnumerateWaveFunc(parameter[5]);
                            for (i = 0;i < numparameters - 6 && i < Q3WAVEPARMS;i++)
                                shader.deforms[deformindex].waveparms[i] = atof(parameter[i+6]);
                        }
                    }
                }
            }
            // hide this shader if a cvar said it should be killed
            if (shader.dpshaderkill)
                shader.numlayers = 0;
            // fix up multiple reflection types
            if(shader.textureflags & Q3TEXTUREFLAG_WATERSHADER)
                shader.textureflags &= ~(Q3TEXTUREFLAG_REFRACTION | Q3TEXTUREFLAG_REFLECTION | Q3TEXTUREFLAG_CAMERA);
 
            Q3Shader_AddToHash (&shader);
        }
        Mem_Free(f);
    }
    FS_FreeSearch(search);
    // free custinfoparm values
    for (j = 0; j < numcustsurfaceflags; j++)
        Mem_Free(custsurfaceparmnames[j]);
}
 
shader_t *Mod_LookupQ3Shader(const char *name)
{
    unsigned short hash;
    q3shader_hash_entry_t* entry;
    if (!q3shaders_mem)
        Mod_LoadQ3Shaders();
    hash = CRC_Block_CaseInsensitive ((const unsigned char *)name, strlen (name));
    entry = q3shader_data->hash + (hash % Q3SHADER_HASH_SIZE);
    while (entry != NULL)
    {
        if (strcasecmp (entry->shader.name, name) == 0)
            return &entry->shader;
        entry = entry->chain;
    }
    return NULL;
}
 
texture_shaderpass_t *Mod_CreateShaderPass(mempool_t *mempool, skinframe_t *skinframe)
{
    texture_shaderpass_t *shaderpass = (texture_shaderpass_t *)Mem_Alloc(mempool, sizeof(*shaderpass));
    shaderpass->framerate = 0.0f;
    shaderpass->numframes = 1;
    shaderpass->blendfunc[0] = GL_ONE;
    shaderpass->blendfunc[1] = GL_ZERO;
    shaderpass->rgbgen.rgbgen = Q3RGBGEN_IDENTITY;
    shaderpass->alphagen.alphagen = Q3ALPHAGEN_IDENTITY;
    shaderpass->alphatest = false;
    shaderpass->tcgen.tcgen = Q3TCGEN_TEXTURE;
    shaderpass->skinframes[0] = skinframe;
    return shaderpass;
}
 
texture_shaderpass_t *Mod_CreateShaderPassFromQ3ShaderLayer(mempool_t *mempool, const char *modelname, q3shaderinfo_layer_t *layer, int layerindex, int texflags, const char *texturename)
{
    int j;
    texture_shaderpass_t *shaderpass = (texture_shaderpass_t *)Mem_Alloc(mempool, sizeof(*shaderpass));
    shaderpass->alphatest = layer->alphatest != 0;
    shaderpass->framerate = layer->framerate;
    shaderpass->numframes = layer->numframes;
    shaderpass->blendfunc[0] = layer->blendfunc[0];
    shaderpass->blendfunc[1] = layer->blendfunc[1];
    shaderpass->rgbgen = layer->rgbgen;
    shaderpass->alphagen = layer->alphagen;
    shaderpass->tcgen = layer->tcgen;
    for (j = 0; j < Q3MAXTCMODS && layer->tcmods[j].tcmod != Q3TCMOD_NONE; j++)
        shaderpass->tcmods[j] = layer->tcmods[j];
    for (j = 0; j < layer->numframes; j++)
        shaderpass->skinframes[j] = R_SkinFrame_LoadExternal(layer->texturename[j], texflags, false, true);
    return shaderpass;
}
 
qbool Mod_LoadTextureFromQ3Shader(mempool_t *mempool, const char *modelname, texture_t *texture, const char *name, qbool warnmissing, qbool fallback, int defaulttexflags, int defaultmaterialflags)
{
    int texflagsmask, texflagsor;
    qbool success = true;
    shader_t *shader;
    if (!name)
        name = "";
    dp_strlcpy(texture->name, name, sizeof(texture->name));
    texture->basealpha = 1.0f;
    shader = name[0] ? Mod_LookupQ3Shader(name) : NULL;
 
    // allow disabling of picmip or compression by defaulttexflags
    texflagsmask = ~0;
    if(!(defaulttexflags & TEXF_PICMIP))
        texflagsmask &= ~TEXF_PICMIP;
    if(!(defaulttexflags & TEXF_COMPRESS))
        texflagsmask &= ~TEXF_COMPRESS;
    texflagsor = 0;
    if(defaulttexflags & TEXF_ISWORLD)
        texflagsor |= TEXF_ISWORLD;
    if(defaulttexflags & TEXF_ISSPRITE)
        texflagsor |= TEXF_ISSPRITE;
    // unless later loaded from the shader
    texture->offsetmapping = (mod_noshader_default_offsetmapping.value) ? OFFSETMAPPING_DEFAULT : OFFSETMAPPING_OFF;
    texture->offsetscale = 1;
    texture->offsetbias = 0;
    texture->specularscalemod = 1;
    texture->specularpowermod = 1; 
    texture->rtlightambient = 0;
    texture->transparentsort = TRANSPARENTSORT_DISTANCE;
    // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
    // JUST GREP FOR "specularscalemod = 1".
 
    if (shader)
    {
        if (developer_loading.integer)
            Con_Printf("%s: loaded shader for %s\n", modelname, name);
 
        if (shader->surfaceparms & Q3SURFACEPARM_SKY)
        {
            texture->basematerialflags = MATERIALFLAG_SKY;
            if (shader->skyboxname[0] && loadmodel)
            {
                // quake3 seems to append a _ to the skybox name, so this must do so as well
                dpsnprintf(loadmodel->brush.skybox, sizeof(loadmodel->brush.skybox), "%s_", shader->skyboxname);
            }
        }
        else if ((texture->surfaceflags & Q3SURFACEFLAG_NODRAW) || shader->numlayers == 0)
            texture->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
        else
            texture->basematerialflags = MATERIALFLAG_WALL;
 
        if (shader->layers[0].alphatest)
            texture->basematerialflags |= MATERIALFLAG_ALPHATEST | MATERIALFLAG_NOSHADOW;
        if (shader->textureflags & Q3TEXTUREFLAG_TWOSIDED)
            texture->basematerialflags |= MATERIALFLAG_NOSHADOW | MATERIALFLAG_NOCULLFACE;
        if (shader->textureflags & Q3TEXTUREFLAG_POLYGONOFFSET)
        {
            texture->biaspolygonoffset += shader->biaspolygonoffset;
            texture->biaspolygonfactor += shader->biaspolygonfactor;
        }
        if (shader->textureflags & Q3TEXTUREFLAG_REFRACTION)
            texture->basematerialflags |= MATERIALFLAG_REFRACTION;
        if (shader->textureflags & Q3TEXTUREFLAG_REFLECTION)
            texture->basematerialflags |= MATERIALFLAG_REFLECTION;
        if (shader->textureflags & Q3TEXTUREFLAG_WATERSHADER)
            texture->basematerialflags |= MATERIALFLAG_WATERSHADER;
        if (shader->textureflags & Q3TEXTUREFLAG_CAMERA)
            texture->basematerialflags |= MATERIALFLAG_CAMERA;
        texture->customblendfunc[0] = GL_ONE;
        texture->customblendfunc[1] = GL_ZERO;
        texture->transparentsort = shader->transparentsort;
        if (shader->numlayers > 0)
        {
            texture->customblendfunc[0] = shader->layers[0].blendfunc[0];
            texture->customblendfunc[1] = shader->layers[0].blendfunc[1];
/*
Q3 shader blendfuncs actually used in the game (* = supported by DP)
* additive               GL_ONE GL_ONE
additive weird         GL_ONE GL_SRC_ALPHA
additive weird 2       GL_ONE GL_ONE_MINUS_SRC_ALPHA
* alpha                  GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA
alpha inverse          GL_ONE_MINUS_SRC_ALPHA GL_SRC_ALPHA
brighten               GL_DST_COLOR GL_ONE
brighten               GL_ONE GL_SRC_COLOR
brighten weird         GL_DST_COLOR GL_ONE_MINUS_DST_ALPHA
brighten weird 2       GL_DST_COLOR GL_SRC_ALPHA
* modulate               GL_DST_COLOR GL_ZERO
* modulate               GL_ZERO GL_SRC_COLOR
modulate inverse       GL_ZERO GL_ONE_MINUS_SRC_COLOR
modulate inverse alpha GL_ZERO GL_SRC_ALPHA
modulate weird inverse GL_ONE_MINUS_DST_COLOR GL_ZERO
* modulate x2            GL_DST_COLOR GL_SRC_COLOR
* no blend               GL_ONE GL_ZERO
nothing                GL_ZERO GL_ONE
*/
            // if not opaque, figure out what blendfunc to use
            if (shader->layers[0].blendfunc[0] != GL_ONE || shader->layers[0].blendfunc[1] != GL_ZERO)
            {
                if (shader->layers[0].blendfunc[0] == GL_ONE && shader->layers[0].blendfunc[1] == GL_ONE)
                    texture->basematerialflags |= MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                else if (shader->layers[0].blendfunc[0] == GL_SRC_ALPHA && shader->layers[0].blendfunc[1] == GL_ONE)
                    texture->basematerialflags |= MATERIALFLAG_ADD | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                else if (shader->layers[0].blendfunc[0] == GL_SRC_ALPHA && shader->layers[0].blendfunc[1] == GL_ONE_MINUS_SRC_ALPHA)
                    texture->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                else
                    texture->basematerialflags |= MATERIALFLAG_CUSTOMBLEND | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
            }
        }
        if (!shader->lighting)
            texture->basematerialflags |= MATERIALFLAG_FULLBRIGHT;
 
        // here be dragons: convert quake3 shaders to material
        if (shader->numlayers > 0)
        {
            int i;
            int terrainbackgroundlayer = -1;
            int lightmaplayer = -1;
            int alphagenspecularlayer = -1;
            int rgbgenvertexlayer = -1;
            int rgbgendiffuselayer = -1;
            int materiallayer = -1;
            int endofprelayers = 0;
            int firstpostlayer = 0;
            int shaderpassindex = 0;
            for (i = 0; i < shader->numlayers; i++)
            {
                if (shader->layers[i].texturename != NULL && !strcasecmp(shader->layers[i].texturename[0], "$lightmap"))
                    lightmaplayer = i;
                if (shader->layers[i].rgbgen.rgbgen == Q3RGBGEN_VERTEX)
                    rgbgenvertexlayer = i;
                if (shader->layers[i].rgbgen.rgbgen == Q3RGBGEN_LIGHTINGDIFFUSE)
                    rgbgendiffuselayer = i;
                if (shader->layers[i].alphagen.alphagen == Q3ALPHAGEN_LIGHTINGSPECULAR)
                    alphagenspecularlayer = i;
            }
            if (shader->numlayers >= 2
             && shader->layers[1].alphagen.alphagen == Q3ALPHAGEN_VERTEX
             && (shader->layers[0].blendfunc[0] == GL_ONE && shader->layers[0].blendfunc[1] == GL_ZERO && !shader->layers[0].alphatest)
             && ((shader->layers[1].blendfunc[0] == GL_SRC_ALPHA && shader->layers[1].blendfunc[1] == GL_ONE_MINUS_SRC_ALPHA)
                 || (shader->layers[1].blendfunc[0] == GL_ONE && shader->layers[1].blendfunc[1] == GL_ZERO && shader->layers[1].alphatest)))
            {
                // terrain blend or certain other effects involving alphatest over a regular layer
                terrainbackgroundlayer = 0;
                materiallayer = 1;
                // terrain may be vertex lit (in which case both layers are rgbGen vertex) or lightmapped (in which ase the third layer is lightmap)
                firstpostlayer = lightmaplayer >= 0 ? lightmaplayer + 1 : materiallayer + 1;
            }
            else if (lightmaplayer == 0)
            {
                // ordinary texture but with $lightmap before diffuse
                materiallayer = 1;
                firstpostlayer = lightmaplayer + 2;
            }
            else if (lightmaplayer >= 1)
            {
                // ordinary texture - we don't properly apply lighting to the prelayers, but oh well...
                endofprelayers = lightmaplayer - 1;
                materiallayer = lightmaplayer - 1;
                firstpostlayer = lightmaplayer + 1;
            }
            else if (rgbgenvertexlayer >= 0)
            {
                // map models with baked lighting
                materiallayer = rgbgenvertexlayer;
                endofprelayers = rgbgenvertexlayer;
                firstpostlayer = rgbgenvertexlayer + 1;
                // special case for rgbgen vertex if MATERIALFLAG_VERTEXCOLOR is expected on this material
                if (defaultmaterialflags & MATERIALFLAG_VERTEXCOLOR)
                    texture->basematerialflags |= MATERIALFLAG_VERTEXCOLOR | MATERIALFLAG_ALPHAGEN_VERTEX;
            }
            else if (rgbgendiffuselayer >= 0)
            {
                // entity models with dynamic lighting
                materiallayer = rgbgendiffuselayer;
                endofprelayers = rgbgendiffuselayer;
                firstpostlayer = rgbgendiffuselayer + 1;
                // player models often have specular as a pass after diffuse - we don't currently make use of that specular texture (would need to meld it into the skinframe)...
                if (alphagenspecularlayer >= 0)
                    firstpostlayer = alphagenspecularlayer + 1;
            }
            else
            {
                // special effects shaders - treat first as primary layer and do everything else as post
                endofprelayers = 0;
                materiallayer = 0;
                firstpostlayer = 1;
            }
            // convert the main material layer
            // FIXME: if alphagenspecularlayer is used, we should pass a specular texture name to R_SkinFrame_LoadExternal and have it load that texture instead of the assumed name for _gloss texture
            if (materiallayer >= 0)
                texture->materialshaderpass = texture->shaderpasses[shaderpassindex++] = Mod_CreateShaderPassFromQ3ShaderLayer(mempool, modelname, &shader->layers[materiallayer], materiallayer, (shader->layers[materiallayer].dptexflags & texflagsmask) | texflagsor, texture->name);
            // convert the terrain background blend layer (if any)
            if (terrainbackgroundlayer >= 0)
                texture->backgroundshaderpass = texture->shaderpasses[shaderpassindex++] = Mod_CreateShaderPassFromQ3ShaderLayer(mempool, modelname, &shader->layers[terrainbackgroundlayer], terrainbackgroundlayer, (shader->layers[terrainbackgroundlayer].dptexflags & texflagsmask) | texflagsor, texture->name);
            // convert the prepass layers (if any)
            texture->startpreshaderpass = shaderpassindex;
            for (i = 0; i < endofprelayers; i++)
                texture->shaderpasses[shaderpassindex++] = Mod_CreateShaderPassFromQ3ShaderLayer(mempool, modelname, &shader->layers[i], i, (shader->layers[i].dptexflags & texflagsmask) | texflagsor, texture->name);
            texture->endpreshaderpass = shaderpassindex;
            texture->startpostshaderpass = shaderpassindex;
            // convert the postpass layers (if any)
            for (i = firstpostlayer; i < shader->numlayers; i++)
                texture->shaderpasses[shaderpassindex++] = Mod_CreateShaderPassFromQ3ShaderLayer(mempool, modelname, &shader->layers[i], i, (shader->layers[i].dptexflags & texflagsmask) | texflagsor, texture->name);
            texture->startpostshaderpass = shaderpassindex;
        }
 
        if (shader->dpshadow)
            texture->basematerialflags &= ~MATERIALFLAG_NOSHADOW;
        if (shader->dpnoshadow)
            texture->basematerialflags |= MATERIALFLAG_NOSHADOW;
        if (shader->dpnortlight)
            texture->basematerialflags |= MATERIALFLAG_NORTLIGHT;
        if (shader->vertexalpha)
            texture->basematerialflags |= MATERIALFLAG_ALPHAGEN_VERTEX;
        memcpy(texture->deforms, shader->deforms, sizeof(texture->deforms));
        texture->reflectmin = shader->reflectmin;
        texture->reflectmax = shader->reflectmax;
        texture->refractfactor = shader->refractfactor;
        Vector4Copy(shader->refractcolor4f, texture->refractcolor4f);
        texture->reflectfactor = shader->reflectfactor;
        Vector4Copy(shader->reflectcolor4f, texture->reflectcolor4f);
        texture->r_water_wateralpha = shader->r_water_wateralpha;
        Vector2Copy(shader->r_water_waterscroll, texture->r_water_waterscroll);
        texture->offsetmapping = shader->offsetmapping;
        texture->offsetscale = shader->offsetscale;
        texture->offsetbias = shader->offsetbias;
        texture->specularscalemod = shader->specularscalemod;
        texture->specularpowermod = shader->specularpowermod;
        texture->rtlightambient = shader->rtlightambient;
        texture->refractive_index = mod_q3shader_default_refractive_index.value;
        if (shader->dpreflectcube[0])
            texture->reflectcubetexture = R_GetCubemap(shader->dpreflectcube);
 
        // set up default supercontents (on q3bsp this is overridden by the q3bsp loader)
        texture->supercontents = SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
        if (shader->surfaceparms & Q3SURFACEPARM_LAVA         ) texture->supercontents  = SUPERCONTENTS_LAVA         ;
        if (shader->surfaceparms & Q3SURFACEPARM_SLIME        ) texture->supercontents  = SUPERCONTENTS_SLIME        ;
        if (shader->surfaceparms & Q3SURFACEPARM_WATER        ) texture->supercontents  = SUPERCONTENTS_WATER        ;
        if (shader->surfaceparms & Q3SURFACEPARM_NONSOLID     ) texture->supercontents  = 0                          ;
        if (shader->surfaceparms & Q3SURFACEPARM_PLAYERCLIP   ) texture->supercontents  = SUPERCONTENTS_PLAYERCLIP   ;
        if (shader->surfaceparms & Q3SURFACEPARM_BOTCLIP      ) texture->supercontents  = SUPERCONTENTS_MONSTERCLIP  ;
        if (shader->surfaceparms & Q3SURFACEPARM_SKY          ) texture->supercontents  = SUPERCONTENTS_SKY          ;
 
    //  if (shader->surfaceparms & Q3SURFACEPARM_ALPHASHADOW  ) texture->supercontents |= SUPERCONTENTS_ALPHASHADOW  ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_AREAPORTAL   ) texture->supercontents |= SUPERCONTENTS_AREAPORTAL   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_CLUSTERPORTAL) texture->supercontents |= SUPERCONTENTS_CLUSTERPORTAL;
    //  if (shader->surfaceparms & Q3SURFACEPARM_DETAIL       ) texture->supercontents |= SUPERCONTENTS_DETAIL       ;
        if (shader->surfaceparms & Q3SURFACEPARM_DONOTENTER   ) texture->supercontents |= SUPERCONTENTS_DONOTENTER   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_FOG          ) texture->supercontents |= SUPERCONTENTS_FOG          ;
        if (shader->surfaceparms & Q3SURFACEPARM_LAVA         ) texture->supercontents |= SUPERCONTENTS_LAVA         ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_LIGHTFILTER  ) texture->supercontents |= SUPERCONTENTS_LIGHTFILTER  ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_METALSTEPS   ) texture->supercontents |= SUPERCONTENTS_METALSTEPS   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NODAMAGE     ) texture->supercontents |= SUPERCONTENTS_NODAMAGE     ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NODLIGHT     ) texture->supercontents |= SUPERCONTENTS_NODLIGHT     ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NODRAW       ) texture->supercontents |= SUPERCONTENTS_NODRAW       ;
        if (shader->surfaceparms & Q3SURFACEPARM_NODROP       ) texture->supercontents |= SUPERCONTENTS_NODROP       ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NOIMPACT     ) texture->supercontents |= SUPERCONTENTS_NOIMPACT     ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NOLIGHTMAP   ) texture->supercontents |= SUPERCONTENTS_NOLIGHTMAP   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NOMARKS      ) texture->supercontents |= SUPERCONTENTS_NOMARKS      ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NOMIPMAPS    ) texture->supercontents |= SUPERCONTENTS_NOMIPMAPS    ;
        if (shader->surfaceparms & Q3SURFACEPARM_NONSOLID     ) texture->supercontents &=~SUPERCONTENTS_SOLID        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_ORIGIN       ) texture->supercontents |= SUPERCONTENTS_ORIGIN       ;
        if (shader->surfaceparms & Q3SURFACEPARM_PLAYERCLIP   ) texture->supercontents |= SUPERCONTENTS_PLAYERCLIP   ;
        if (shader->surfaceparms & Q3SURFACEPARM_SKY          ) texture->supercontents |= SUPERCONTENTS_SKY          ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_SLICK        ) texture->supercontents |= SUPERCONTENTS_SLICK        ;
        if (shader->surfaceparms & Q3SURFACEPARM_SLIME        ) texture->supercontents |= SUPERCONTENTS_SLIME        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_STRUCTURAL   ) texture->supercontents |= SUPERCONTENTS_STRUCTURAL   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_TRANS        ) texture->supercontents |= SUPERCONTENTS_TRANS        ;
        if (shader->surfaceparms & Q3SURFACEPARM_WATER        ) texture->supercontents |= SUPERCONTENTS_WATER        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_POINTLIGHT   ) texture->supercontents |= SUPERCONTENTS_POINTLIGHT   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_HINT         ) texture->supercontents |= SUPERCONTENTS_HINT         ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_DUST         ) texture->supercontents |= SUPERCONTENTS_DUST         ;
        if (shader->surfaceparms & Q3SURFACEPARM_BOTCLIP      ) texture->supercontents |= SUPERCONTENTS_BOTCLIP      | SUPERCONTENTS_MONSTERCLIP;
    //  if (shader->surfaceparms & Q3SURFACEPARM_LIGHTGRID    ) texture->supercontents |= SUPERCONTENTS_LIGHTGRID    ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_ANTIPORTAL   ) texture->supercontents |= SUPERCONTENTS_ANTIPORTAL   ;
 
        texture->surfaceflags = shader->surfaceflags;
        if (shader->surfaceparms & Q3SURFACEPARM_ALPHASHADOW  ) texture->surfaceflags |= Q3SURFACEFLAG_ALPHASHADOW  ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_AREAPORTAL   ) texture->surfaceflags |= Q3SURFACEFLAG_AREAPORTAL   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_CLUSTERPORTAL) texture->surfaceflags |= Q3SURFACEFLAG_CLUSTERPORTAL;
    //  if (shader->surfaceparms & Q3SURFACEPARM_DETAIL       ) texture->surfaceflags |= Q3SURFACEFLAG_DETAIL       ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_DONOTENTER   ) texture->surfaceflags |= Q3SURFACEFLAG_DONOTENTER   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_FOG          ) texture->surfaceflags |= Q3SURFACEFLAG_FOG          ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_LAVA         ) texture->surfaceflags |= Q3SURFACEFLAG_LAVA         ;
        if (shader->surfaceparms & Q3SURFACEPARM_LIGHTFILTER  ) texture->surfaceflags |= Q3SURFACEFLAG_LIGHTFILTER  ;
        if (shader->surfaceparms & Q3SURFACEPARM_METALSTEPS   ) texture->surfaceflags |= Q3SURFACEFLAG_METALSTEPS   ;
        if (shader->surfaceparms & Q3SURFACEPARM_NODAMAGE     ) texture->surfaceflags |= Q3SURFACEFLAG_NODAMAGE     ;
        if (shader->surfaceparms & Q3SURFACEPARM_NODLIGHT     ) texture->surfaceflags |= Q3SURFACEFLAG_NODLIGHT     ;
        if (shader->surfaceparms & Q3SURFACEPARM_NODRAW       ) texture->surfaceflags |= Q3SURFACEFLAG_NODRAW       ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NODROP       ) texture->surfaceflags |= Q3SURFACEFLAG_NODROP       ;
        if (shader->surfaceparms & Q3SURFACEPARM_NOIMPACT     ) texture->surfaceflags |= Q3SURFACEFLAG_NOIMPACT     ;
        if (shader->surfaceparms & Q3SURFACEPARM_NOLIGHTMAP   ) texture->surfaceflags |= Q3SURFACEFLAG_NOLIGHTMAP   ;
        if (shader->surfaceparms & Q3SURFACEPARM_NOMARKS      ) texture->surfaceflags |= Q3SURFACEFLAG_NOMARKS      ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_NOMIPMAPS    ) texture->surfaceflags |= Q3SURFACEFLAG_NOMIPMAPS    ;
        if (shader->surfaceparms & Q3SURFACEPARM_NONSOLID     ) texture->surfaceflags |= Q3SURFACEFLAG_NONSOLID     ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_ORIGIN       ) texture->surfaceflags |= Q3SURFACEFLAG_ORIGIN       ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_PLAYERCLIP   ) texture->surfaceflags |= Q3SURFACEFLAG_PLAYERCLIP   ;
        if (shader->surfaceparms & Q3SURFACEPARM_SKY          ) texture->surfaceflags |= Q3SURFACEFLAG_SKY          ;
        if (shader->surfaceparms & Q3SURFACEPARM_SLICK        ) texture->surfaceflags |= Q3SURFACEFLAG_SLICK        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_SLIME        ) texture->surfaceflags |= Q3SURFACEFLAG_SLIME        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_STRUCTURAL   ) texture->surfaceflags |= Q3SURFACEFLAG_STRUCTURAL   ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_TRANS        ) texture->surfaceflags |= Q3SURFACEFLAG_TRANS        ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_WATER        ) texture->surfaceflags |= Q3SURFACEFLAG_WATER        ;
        if (shader->surfaceparms & Q3SURFACEPARM_POINTLIGHT   ) texture->surfaceflags |= Q3SURFACEFLAG_POINTLIGHT   ;
        if (shader->surfaceparms & Q3SURFACEPARM_HINT         ) texture->surfaceflags |= Q3SURFACEFLAG_HINT         ;
        if (shader->surfaceparms & Q3SURFACEPARM_DUST         ) texture->surfaceflags |= Q3SURFACEFLAG_DUST         ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_BOTCLIP      ) texture->surfaceflags |= Q3SURFACEFLAG_BOTCLIP      ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_LIGHTGRID    ) texture->surfaceflags |= Q3SURFACEFLAG_LIGHTGRID    ;
    //  if (shader->surfaceparms & Q3SURFACEPARM_ANTIPORTAL   ) texture->surfaceflags |= Q3SURFACEFLAG_ANTIPORTAL   ;
 
        if (shader->dpmeshcollisions)
            texture->basematerialflags |= MATERIALFLAG_MESHCOLLISIONS;
        if (shader->dpshaderkill && developer_extra.integer)
            Con_DPrintf("^1%s:^7 killing shader ^3\"%s\" because of cvar\n", modelname, name);
    }
    else if (!strcmp(texture->name, "noshader") || !texture->name[0])
    {
        if (developer_extra.integer)
            Con_DPrintf("^1%s:^7 using fallback noshader material for ^3\"%s\"\n", modelname, name);
        texture->basematerialflags = defaultmaterialflags;
        texture->supercontents = SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
    }
    else if (!strcmp(texture->name, "common/nodraw") || !strcmp(texture->name, "textures/common/nodraw"))
    {
        if (developer_extra.integer)
            Con_DPrintf("^1%s:^7 using fallback nodraw material for ^3\"%s\"\n", modelname, name);
        texture->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
        texture->supercontents = SUPERCONTENTS_SOLID;
    }
    else
    {
        if (developer_extra.integer)
            Con_DPrintf("^1%s:^7 No shader found for texture ^3\"%s\"\n", modelname, texture->name);
        if (texture->surfaceflags & Q3SURFACEFLAG_NODRAW)
        {
            texture->basematerialflags = MATERIALFLAG_NODRAW | MATERIALFLAG_NOSHADOW;
            texture->supercontents = SUPERCONTENTS_SOLID;
        }
        else if (texture->surfaceflags & Q3SURFACEFLAG_SKY)
        {
            texture->basematerialflags = MATERIALFLAG_SKY;
            texture->supercontents = SUPERCONTENTS_SKY;
        }
        else
        {
            texture->basematerialflags = defaultmaterialflags;
            texture->supercontents = SUPERCONTENTS_SOLID | SUPERCONTENTS_OPAQUE;
        }
        if(cls.state == ca_dedicated)
        {
            texture->materialshaderpass = NULL;
            success = false;
        }
        else
        {
            skinframe_t *skinframe = R_SkinFrame_LoadExternal(texture->name, defaulttexflags, false, fallback);
            if (skinframe)
            {
                texture->materialshaderpass = texture->shaderpasses[0] = Mod_CreateShaderPass(mempool, skinframe);
                if (texture->materialshaderpass->skinframes[0]->hasalpha)
                    texture->basematerialflags |= MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED | MATERIALFLAG_NOSHADOW;
                if (texture->q2contents)
                    texture->supercontents = Mod_Q2BSP_SuperContentsFromNativeContents(texture->q2contents);
            }
            else
                success = false;
            if (!success && warnmissing)
                Con_Printf("^1%s:^7 could not load texture ^3\"%s\"\n", modelname, texture->name);
        }
    }
    // init the animation variables
    texture->currentframe = texture;
    texture->currentmaterialflags = texture->basematerialflags;
    if (!texture->materialshaderpass)
        texture->materialshaderpass = texture->shaderpasses[0] = Mod_CreateShaderPass(mempool, R_SkinFrame_LoadMissing());
    if (!texture->materialshaderpass->skinframes[0])
        texture->materialshaderpass->skinframes[0] = R_SkinFrame_LoadMissing();
    texture->currentskinframe = texture->materialshaderpass ? texture->materialshaderpass->skinframes[0] : NULL;
    texture->backgroundcurrentskinframe = texture->backgroundshaderpass ? texture->backgroundshaderpass->skinframes[0] : NULL;
    return success;
}
 
void Mod_LoadCustomMaterial(mempool_t *mempool, texture_t *texture, const char *name, int supercontents, int materialflags, skinframe_t *skinframe)
{
    if (!(materialflags & (MATERIALFLAG_WALL | MATERIALFLAG_SKY)))
        Con_DPrintf("^1Custom texture ^3\"%s\" does not have MATERIALFLAG_WALL set\n", texture->name);
 
    dp_strlcpy(texture->name, name, sizeof(texture->name));
    texture->basealpha = 1.0f;
    texture->basematerialflags = materialflags;
    texture->supercontents = supercontents;
 
    texture->offsetmapping = (mod_noshader_default_offsetmapping.value) ? OFFSETMAPPING_DEFAULT : OFFSETMAPPING_OFF;
    texture->offsetscale = 1;
    texture->offsetbias = 0;
    texture->specularscalemod = 1;
    texture->specularpowermod = 1;
    texture->rtlightambient = 0;
    texture->transparentsort = TRANSPARENTSORT_DISTANCE;
    // WHEN ADDING DEFAULTS HERE, REMEMBER TO PUT DEFAULTS IN ALL LOADERS
    // JUST GREP FOR "specularscalemod = 1".
 
    if (developer_extra.integer)
        Con_DPrintf("^1Custom texture ^3\"%s\"\n", texture->name);
    if (skinframe)
        texture->materialshaderpass = texture->shaderpasses[0] = Mod_CreateShaderPass(mempool, skinframe);
 
    // init the animation variables
    texture->currentmaterialflags = texture->basematerialflags;
    texture->currentframe = texture;
    texture->currentskinframe = skinframe;
    texture->backgroundcurrentskinframe = NULL;
}
 
void Mod_UnloadCustomMaterial(texture_t *texture, qbool purgeskins)
{
    long unsigned int i, j;
    for (i = 0; i < sizeof(texture->shaderpasses) / sizeof(texture->shaderpasses[0]); i++)
    {
        if (texture->shaderpasses[i])
        {
            if (purgeskins)
                for (j = 0; j < sizeof(texture->shaderpasses[i]->skinframes) / sizeof(skinframe_t *);j++)
                    if (texture->shaderpasses[i]->skinframes[j] && texture->shaderpasses[i]->skinframes[j]->base)
                        R_SkinFrame_PurgeSkinFrame(texture->shaderpasses[i]->skinframes[j]);
            Mem_Free(texture->shaderpasses[i]);
            texture->shaderpasses[i] = NULL;
        }
    }
    texture->materialshaderpass = NULL;
    texture->currentskinframe = NULL;
    texture->backgroundcurrentskinframe = NULL;
}
 
skinfile_t *Mod_LoadSkinFiles(void)
{
    int i, words, line, wordsoverflow;
    char *text;
    const char *data;
    skinfile_t *skinfile = NULL, *first = NULL;
    skinfileitem_t *skinfileitem;
    char word[10][MAX_QPATH];
    char vabuf[1024];
 
/*
sample file:
U_bodyBox,models/players/Legoman/BikerA2.tga
U_RArm,models/players/Legoman/BikerA1.tga
U_LArm,models/players/Legoman/BikerA1.tga
U_armor,common/nodraw
U_sword,common/nodraw
U_shield,common/nodraw
U_homb,common/nodraw
U_backpack,common/nodraw
U_colcha,common/nodraw
tag_head,
tag_weapon,
tag_torso,
*/
    memset(word, 0, sizeof(word));
    for (i = 0;i < 256 && (data = text = (char *)FS_LoadFile(va(vabuf, sizeof(vabuf), "%s_%i.skin", loadmodel->name, i), tempmempool, true, NULL));i++)
    {
        // If it's the first file we parse
        if (skinfile == NULL)
        {
            skinfile = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
            first = skinfile;
        }
        else
        {
            skinfile->next = (skinfile_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfile_t));
            skinfile = skinfile->next;
        }
        skinfile->next = NULL;
 
        for(line = 0;;line++)
        {
            // parse line
            if (!COM_ParseToken_QuakeC(&data, true))
                break;
            if (!strcmp(com_token, "\n"))
                continue;
            words = 0;
            wordsoverflow = false;
            do
            {
                if (words < 10)
                    dp_strlcpy(word[words++], com_token, sizeof (word[0]));
                else
                    wordsoverflow = true;
            }
            while (COM_ParseToken_QuakeC(&data, true) && strcmp(com_token, "\n"));
            if (wordsoverflow)
            {
                Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: line with too many statements, skipping\n", loadmodel->name, i, line);
                continue;
            }
            // words is always >= 1
            if (!strcmp(word[0], "replace"))
            {
                if (words == 3)
                {
                    if (developer_loading.integer)
                        Con_Printf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[1], word[2]);
                    skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
                    skinfileitem->next = skinfile->items;
                    skinfile->items = skinfileitem;
                    dp_strlcpy (skinfileitem->name, word[1], sizeof (skinfileitem->name));
                    dp_strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
                }
                else
                    Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: wrong number of parameters to command \"%s\", see documentation in DP_GFX_SKINFILES extension in dpextensions.qc\n", loadmodel->name, i, line, word[0]);
            }
            else if (words >= 2 && !strncmp(word[0], "tag_", 4))
            {
                // tag name, like "tag_weapon,"
                // not used for anything (not even in Quake3)
            }
            else if (words >= 2 && !strcmp(word[1], ","))
            {
                // mesh shader name, like "U_RArm,models/players/Legoman/BikerA1.tga"
                if (developer_loading.integer)
                    Con_Printf("Mod_LoadSkinFiles: parsed mesh \"%s\" shader replacement \"%s\"\n", word[0], word[2]);
                skinfileitem = (skinfileitem_t *)Mem_Alloc(loadmodel->mempool, sizeof(skinfileitem_t));
                skinfileitem->next = skinfile->items;
                skinfile->items = skinfileitem;
                dp_strlcpy (skinfileitem->name, word[0], sizeof (skinfileitem->name));
                dp_strlcpy (skinfileitem->replacement, word[2], sizeof (skinfileitem->replacement));
            }
            else
                Con_Printf("Mod_LoadSkinFiles: parsing error in file \"%s_%i.skin\" on line #%i: does not look like tag or mesh specification, or replace command, see documentation in DP_GFX_SKINFILES extension in dpextensions.qc\n", loadmodel->name, i, line);
        }
        Mem_Free(text);
    }
    if (i)
        loadmodel->numskins = i;
    return first;
}
 
void Mod_FreeSkinFiles(skinfile_t *skinfile)
{
    skinfile_t *next;
    skinfileitem_t *skinfileitem, *nextitem;
    for (;skinfile;skinfile = next)
    {
        next = skinfile->next;
        for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = nextitem)
        {
            nextitem = skinfileitem->next;
            Mem_Free(skinfileitem);
        }
        Mem_Free(skinfile);
    }
}
 
int Mod_CountSkinFiles(skinfile_t *skinfile)
{
    int i;
    for (i = 0;skinfile;skinfile = skinfile->next, i++);
    return i;
}
 
void Mod_SnapVertices(int numcomponents, int numvertices, float *vertices, float snap)
{
    int i;
    double isnap = 1.0 / snap;
    for (i = 0;i < numvertices*numcomponents;i++)
        vertices[i] = floor(vertices[i]*isnap)*snap;
}
 
int Mod_RemoveDegenerateTriangles(int numtriangles, const int *inelement3i, int *outelement3i, const float *vertex3f)
{
    int i, outtriangles;
    float edgedir1[3], edgedir2[3], temp[3];
    // a degenerate triangle is one with no width (thickness, surface area)
    // these are characterized by having all 3 points colinear (along a line)
    // or having two points identical
    // the simplest check is to calculate the triangle's area
    for (i = 0, outtriangles = 0;i < numtriangles;i++, inelement3i += 3)
    {
        // calculate first edge
        VectorSubtract(vertex3f + inelement3i[1] * 3, vertex3f + inelement3i[0] * 3, edgedir1);
        VectorSubtract(vertex3f + inelement3i[2] * 3, vertex3f + inelement3i[0] * 3, edgedir2);
        CrossProduct(edgedir1, edgedir2, temp);
        if (VectorLength2(temp) < 0.001f)
            continue; // degenerate triangle (no area)
        // valid triangle (has area)
        VectorCopy(inelement3i, outelement3i);
        outelement3i += 3;
        outtriangles++;
    }
    return outtriangles;
}
 
void Mod_VertexRangeFromElements(int numelements, const int *elements, int *firstvertexpointer, int *lastvertexpointer)
{
    int i, e;
    int firstvertex, lastvertex;
    if (numelements > 0 && elements)
    {
        firstvertex = lastvertex = elements[0];
        for (i = 1;i < numelements;i++)
        {
            e = elements[i];
            firstvertex = min(firstvertex, e);
            lastvertex = max(lastvertex, e);
        }
    }
    else
        firstvertex = lastvertex = 0;
    if (firstvertexpointer)
        *firstvertexpointer = firstvertex;
    if (lastvertexpointer)
        *lastvertexpointer = lastvertex;
}
 
void Mod_SetDrawSkyAndWater(model_t* mod)
{
    int j;
    uint64_t basematerialflags = 0;
    // by default assume there is no sky or water used in this model
    mod->DrawSky = NULL;
    mod->DrawAddWaterPlanes = NULL;
    // combine all basematerialflags observed in the submodelsurfaces range, then check for special flags
    for (j = mod->submodelsurfaces_start; j < mod->submodelsurfaces_end; j++)
        if (mod->data_surfaces[j].texture)
            basematerialflags |= mod->data_surfaces[j].texture->basematerialflags;
    if (basematerialflags & MATERIALFLAG_SKY)
        mod->DrawSky = R_Mod_DrawSky;
    if (basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
        mod->DrawAddWaterPlanes = R_Mod_DrawAddWaterPlanes;
}
 
typedef struct Mod_MakeSortedSurfaces_qsortsurface_s
{
    int surfaceindex;
    q3deffect_t* effect;
    texture_t* texture;
    rtexture_t* lightmaptexture;
}
Mod_MakeSortedSurfaces_qsortsurface_t;
 
static int Mod_MakeSortedSurfaces_qsortfunc(const void *a, const void *b)
{
    const Mod_MakeSortedSurfaces_qsortsurface_t* l = (Mod_MakeSortedSurfaces_qsortsurface_t*)a;
    const Mod_MakeSortedSurfaces_qsortsurface_t* r = (Mod_MakeSortedSurfaces_qsortsurface_t*)b;
    if (l->effect < r->effect)
        return -1;
    if (l->effect > r->effect)
        return 1;
    if (l->texture < r->texture)
        return -1;
    if (l->texture > r->texture)
        return 1;
    if (l->lightmaptexture < r->lightmaptexture)
        return -1;
    if (l->lightmaptexture > r->lightmaptexture)
        return 1;
    if (l->surfaceindex < r->surfaceindex)
        return -1;
    if (l->surfaceindex > r->surfaceindex)
        return 1;
    return 0;
}
 
void Mod_MakeSortedSurfaces(model_t *mod)
{
    // make an optimal set of texture-sorted batches to draw...
    int j, k;
    Mod_MakeSortedSurfaces_qsortsurface_t *info;
 
    if(cls.state == ca_dedicated)
        return;
 
    info = (Mod_MakeSortedSurfaces_qsortsurface_t*)Mem_Alloc(loadmodel->mempool, mod->num_surfaces * sizeof(*info));
    if (!mod->modelsurfaces_sorted)
        mod->modelsurfaces_sorted = (int *) Mem_Alloc(loadmodel->mempool, mod->num_surfaces * sizeof(*mod->modelsurfaces_sorted));
    // the goal is to sort by submodel (can't change which submodel a surface belongs to), and then by effects and textures
    for (j = 0; j < mod->num_surfaces; j++)
    {
        info[j].surfaceindex = j;
        info[j].effect = mod->data_surfaces[j].effect;
        info[j].texture = mod->data_surfaces[j].texture;
        info[j].lightmaptexture = mod->data_surfaces[j].lightmaptexture;
    }
    for (k = 0; k < mod->brush.numsubmodels; k++)
        if (mod->brush.submodels[k]->submodelsurfaces_end > mod->brush.submodels[k]->submodelsurfaces_start + 1)
            qsort(info + mod->brush.submodels[k]->submodelsurfaces_start, (size_t)mod->brush.submodels[k]->submodelsurfaces_end - mod->brush.submodels[k]->submodelsurfaces_start, sizeof(*info), Mod_MakeSortedSurfaces_qsortfunc);
    for (j = 0; j < mod->num_surfaces; j++)
        mod->modelsurfaces_sorted[j] = info[j].surfaceindex;
    Mem_Free(info);
}
 
void Mod_BuildVBOs(void)
{
    if(cls.state == ca_dedicated)
        return;
 
    if (!loadmodel->surfmesh.num_vertices)
        return;
 
    if (gl_paranoid.integer && loadmodel->surfmesh.data_element3s && loadmodel->surfmesh.data_element3i)
    {
        int i;
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
        {
            if (loadmodel->surfmesh.data_element3s[i] != loadmodel->surfmesh.data_element3i[i])
            {
                Con_Printf(CON_WARN "Mod_BuildVBOs: element %u is incorrect (%u should be %u)\n", i, loadmodel->surfmesh.data_element3s[i], loadmodel->surfmesh.data_element3i[i]);
                loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
            }
        }
    }
 
    // upload short indices as a buffer
    if (loadmodel->surfmesh.data_element3s && !loadmodel->surfmesh.data_element3s_indexbuffer)
        loadmodel->surfmesh.data_element3s_indexbuffer = R_Mesh_CreateMeshBuffer(loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles * sizeof(short[3]), loadmodel->name, true, false, false, true);
 
    // upload int indices as a buffer
    if (loadmodel->surfmesh.data_element3i && !loadmodel->surfmesh.data_element3i_indexbuffer && !loadmodel->surfmesh.data_element3s)
        loadmodel->surfmesh.data_element3i_indexbuffer = R_Mesh_CreateMeshBuffer(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.num_triangles * sizeof(int[3]), loadmodel->name, true, false, false, false);
 
    // only build a vbo if one has not already been created (this is important for brush models which load specially)
    // we put several vertex data streams in the same buffer
    if (!loadmodel->surfmesh.data_vertex3f_vertexbuffer)
    {
        int size;
        unsigned char *mem;
        size = 0;
        loadmodel->surfmesh.data_vertex3f_bufferoffset           = size;if (loadmodel->surfmesh.data_vertex3f          ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
        loadmodel->surfmesh.data_svector3f_bufferoffset          = size;if (loadmodel->surfmesh.data_svector3f         ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
        loadmodel->surfmesh.data_tvector3f_bufferoffset          = size;if (loadmodel->surfmesh.data_tvector3f         ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
        loadmodel->surfmesh.data_normal3f_bufferoffset           = size;if (loadmodel->surfmesh.data_normal3f          ) size += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
        loadmodel->surfmesh.data_texcoordtexture2f_bufferoffset  = size;if (loadmodel->surfmesh.data_texcoordtexture2f ) size += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
        loadmodel->surfmesh.data_texcoordlightmap2f_bufferoffset = size;if (loadmodel->surfmesh.data_texcoordlightmap2f) size += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
        loadmodel->surfmesh.data_lightmapcolor4f_bufferoffset    = size;if (loadmodel->surfmesh.data_lightmapcolor4f   ) size += loadmodel->surfmesh.num_vertices * sizeof(float[4]);
        loadmodel->surfmesh.data_skeletalindex4ub_bufferoffset   = size;if (loadmodel->surfmesh.data_skeletalindex4ub  ) size += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
        loadmodel->surfmesh.data_skeletalweight4ub_bufferoffset  = size;if (loadmodel->surfmesh.data_skeletalweight4ub ) size += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
        mem = (unsigned char *)Mem_Alloc(tempmempool, size);
        if (loadmodel->surfmesh.data_vertex3f          ) memcpy(mem + loadmodel->surfmesh.data_vertex3f_bufferoffset          , loadmodel->surfmesh.data_vertex3f          , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
        if (loadmodel->surfmesh.data_svector3f         ) memcpy(mem + loadmodel->surfmesh.data_svector3f_bufferoffset         , loadmodel->surfmesh.data_svector3f         , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
        if (loadmodel->surfmesh.data_tvector3f         ) memcpy(mem + loadmodel->surfmesh.data_tvector3f_bufferoffset         , loadmodel->surfmesh.data_tvector3f         , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
        if (loadmodel->surfmesh.data_normal3f          ) memcpy(mem + loadmodel->surfmesh.data_normal3f_bufferoffset          , loadmodel->surfmesh.data_normal3f          , loadmodel->surfmesh.num_vertices * sizeof(float[3]));
        if (loadmodel->surfmesh.data_texcoordtexture2f ) memcpy(mem + loadmodel->surfmesh.data_texcoordtexture2f_bufferoffset , loadmodel->surfmesh.data_texcoordtexture2f , loadmodel->surfmesh.num_vertices * sizeof(float[2]));
        if (loadmodel->surfmesh.data_texcoordlightmap2f) memcpy(mem + loadmodel->surfmesh.data_texcoordlightmap2f_bufferoffset, loadmodel->surfmesh.data_texcoordlightmap2f, loadmodel->surfmesh.num_vertices * sizeof(float[2]));
        if (loadmodel->surfmesh.data_lightmapcolor4f   ) memcpy(mem + loadmodel->surfmesh.data_lightmapcolor4f_bufferoffset   , loadmodel->surfmesh.data_lightmapcolor4f   , loadmodel->surfmesh.num_vertices * sizeof(float[4]));
        if (loadmodel->surfmesh.data_skeletalindex4ub  ) memcpy(mem + loadmodel->surfmesh.data_skeletalindex4ub_bufferoffset  , loadmodel->surfmesh.data_skeletalindex4ub  , loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]));
        if (loadmodel->surfmesh.data_skeletalweight4ub ) memcpy(mem + loadmodel->surfmesh.data_skeletalweight4ub_bufferoffset , loadmodel->surfmesh.data_skeletalweight4ub , loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]));
        loadmodel->surfmesh.data_vertex3f_vertexbuffer = R_Mesh_CreateMeshBuffer(mem, size, loadmodel->name, false, false, false, false);
        loadmodel->surfmesh.data_svector3f_vertexbuffer = loadmodel->surfmesh.data_svector3f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_tvector3f_vertexbuffer = loadmodel->surfmesh.data_tvector3f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_normal3f_vertexbuffer = loadmodel->surfmesh.data_normal3f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_texcoordtexture2f_vertexbuffer = loadmodel->surfmesh.data_texcoordtexture2f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_texcoordlightmap2f_vertexbuffer = loadmodel->surfmesh.data_texcoordlightmap2f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_lightmapcolor4f_vertexbuffer = loadmodel->surfmesh.data_lightmapcolor4f ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_skeletalindex4ub_vertexbuffer = loadmodel->surfmesh.data_skeletalindex4ub ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        loadmodel->surfmesh.data_skeletalweight4ub_vertexbuffer = loadmodel->surfmesh.data_skeletalweight4ub ? loadmodel->surfmesh.data_vertex3f_vertexbuffer : NULL;
        Mem_Free(mem);
    }
}
 
extern cvar_t mod_obj_orientation;
static void Mod_Decompile_OBJ(model_t *model, const char *filename, const char *mtlfilename, const char *originalfilename)
{
    int submodelindex, vertexindex, surfaceindex, triangleindex, textureindex, countvertices = 0, countsurfaces = 0, countfaces = 0, counttextures = 0;
    int a, b, c;
    const char *texname;
    const int *e;
    const float *v, *vn, *vt;
    size_t l;
    size_t outbufferpos = 0;
    size_t outbuffermax = 0x100000;
    char *outbuffer = (char *) Z_Malloc(outbuffermax), *oldbuffer;
    const msurface_t *surface;
    const int maxtextures = 256;
    char *texturenames = (char *) Z_Malloc(maxtextures * MAX_QPATH);
    model_t *submodel;
 
    // construct the mtllib file
    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "# mtllib for %s exported by darkplaces engine\n", originalfilename);
    if (l > 0)
        outbufferpos += l;
    for (surfaceindex = 0, surface = model->data_surfaces;surfaceindex < model->num_surfaces;surfaceindex++, surface++)
    {
        countsurfaces++;
        countvertices += surface->num_vertices;
        countfaces += surface->num_triangles;
        texname = (surface->texture && surface->texture->name[0]) ? surface->texture->name : "default";
        for (textureindex = 0;textureindex < counttextures;textureindex++)
            if (!strcmp(texturenames + textureindex * MAX_QPATH, texname))
                break;
        if (textureindex < counttextures)
            continue; // already wrote this material entry
        if (textureindex >= maxtextures)
            continue; // just a precaution
        textureindex = counttextures++;
        dp_strlcpy(texturenames + textureindex * MAX_QPATH, texname, MAX_QPATH);
        if (outbufferpos >= outbuffermax >> 1)
        {
            outbuffermax *= 2;
            oldbuffer = outbuffer;
            outbuffer = (char *) Z_Malloc(outbuffermax);
            memcpy(outbuffer, oldbuffer, outbufferpos);
            Z_Free(oldbuffer);
        }
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "newmtl %s\nNs 96.078431\nKa 0 0 0\nKd 0.64 0.64 0.64\nKs 0.5 0.5 0.5\nNi 1\nd 1\nillum 2\nmap_Kd %s%s\n\n", texname, texname, strstr(texname, ".tga") ? "" : ".tga");
        if (l > 0)
            outbufferpos += l;
    }
 
    // write the mtllib file
    FS_WriteFile(mtlfilename, outbuffer, outbufferpos);
 
    // construct the obj file
    outbufferpos = 0;
    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "# model exported from %s by darkplaces engine\n# %i vertices, %i faces, %i surfaces\nmtllib %s\n", originalfilename, countvertices, countfaces, countsurfaces, mtlfilename);
    if (l > 0)
        outbufferpos += l;
 
    for (vertexindex = 0, v = model->surfmesh.data_vertex3f, vn = model->surfmesh.data_normal3f, vt = model->surfmesh.data_texcoordtexture2f;vertexindex < model->surfmesh.num_vertices;vertexindex++, v += 3, vn += 3, vt += 2)
    {
        if (outbufferpos >= outbuffermax >> 1)
        {
            outbuffermax *= 2;
            oldbuffer = outbuffer;
            outbuffer = (char *) Z_Malloc(outbuffermax);
            memcpy(outbuffer, oldbuffer, outbufferpos);
            Z_Free(oldbuffer);
        }
        if(mod_obj_orientation.integer)
            l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "v %f %f %f\nvn %f %f %f\nvt %f %f\n", v[0], v[2], v[1], vn[0], vn[2], vn[1], vt[0], 1-vt[1]);
        else
            l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "v %f %f %f\nvn %f %f %f\nvt %f %f\n", v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1-vt[1]);
        if (l > 0)
            outbufferpos += l;
    }
 
    for (submodelindex = 0;submodelindex < max(1, model->brush.numsubmodels);submodelindex++)
    {
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "o %i\n", submodelindex);
        if (l > 0)
            outbufferpos += l;
        submodel = model->brush.numsubmodels ? model->brush.submodels[submodelindex] : model;
        for (surfaceindex = submodel->submodelsurfaces_start;surfaceindex < submodel->submodelsurfaces_end;surfaceindex++)
        {
            surface = model->data_surfaces + surfaceindex;
            l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "usemtl %s\n", (surface->texture && surface->texture->name[0]) ? surface->texture->name : "default");
            if (l > 0)
                outbufferpos += l;
            for (triangleindex = 0, e = model->surfmesh.data_element3i + surface->num_firsttriangle * 3;triangleindex < surface->num_triangles;triangleindex++, e += 3)
            {
                if (outbufferpos >= outbuffermax >> 1)
                {
                    outbuffermax *= 2;
                    oldbuffer = outbuffer;
                    outbuffer = (char *) Z_Malloc(outbuffermax);
                    memcpy(outbuffer, oldbuffer, outbufferpos);
                    Z_Free(oldbuffer);
                }
                a = e[0]+1;
                b = e[1]+1;
                c = e[2]+1;
                if(mod_obj_orientation.integer)
                    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", a,a,a,b,b,b,c,c,c);
                else
                    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "f %i/%i/%i %i/%i/%i %i/%i/%i\n", a,a,a,c,c,c,b,b,b);
                if (l > 0)
                    outbufferpos += l;
            }
        }
    }
 
    // write the obj file
    FS_WriteFile(filename, outbuffer, outbufferpos);
 
    // clean up
    Z_Free(outbuffer);
    Z_Free(texturenames);
 
    // print some stats
    Con_Printf("Wrote %s (%i bytes, %i vertices, %i faces, %i surfaces with %i distinct textures)\n", filename, (int)outbufferpos, countvertices, countfaces, countsurfaces, counttextures);
}
 
static void Mod_Decompile_SMD(model_t *model, const char *filename, int firstpose, int numposes, qbool writetriangles)
{
    int countnodes = 0, counttriangles = 0, countframes = 0;
    int surfaceindex;
    int triangleindex;
    int transformindex;
    int poseindex;
    int cornerindex;
    const int *e;
    size_t l;
    size_t outbufferpos = 0;
    size_t outbuffermax = 0x100000;
    char *outbuffer = (char *) Z_Malloc(outbuffermax), *oldbuffer;
    const msurface_t *surface;
    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "version 1\nnodes\n");
    if (l > 0)
        outbufferpos += l;
    for (transformindex = 0;transformindex < model->num_bones;transformindex++)
    {
        if (outbufferpos >= outbuffermax >> 1)
        {
            outbuffermax *= 2;
            oldbuffer = outbuffer;
            outbuffer = (char *) Z_Malloc(outbuffermax);
            memcpy(outbuffer, oldbuffer, outbufferpos);
            Z_Free(oldbuffer);
        }
        countnodes++;
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i \"%s\" %3i\n", transformindex, model->data_bones[transformindex].name, model->data_bones[transformindex].parent);
        if (l > 0)
            outbufferpos += l;
    }
    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "end\nskeleton\n");
    if (l > 0)
        outbufferpos += l;
    for (poseindex = 0;poseindex < numposes;poseindex++)
    {
        countframes++;
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "time %i\n", poseindex);
        if (l > 0)
            outbufferpos += l;
        for (transformindex = 0;transformindex < model->num_bones;transformindex++)
        {
            float angles[3];
            float mtest[4][3];
            matrix4x4_t posematrix;
            if (outbufferpos >= outbuffermax >> 1)
            {
                outbuffermax *= 2;
                oldbuffer = outbuffer;
                outbuffer = (char *) Z_Malloc(outbuffermax);
                memcpy(outbuffer, oldbuffer, outbufferpos);
                Z_Free(oldbuffer);
            }
 
            // strangely the smd angles are for a transposed matrix, so we
            // have to generate a transposed matrix, then convert that...
            Matrix4x4_FromBonePose7s(&posematrix, model->num_posescale, model->data_poses7s + 7*(model->num_bones * poseindex + transformindex));
            Matrix4x4_ToArray12FloatGL(&posematrix, mtest);
            AnglesFromVectors(angles, mtest[0], mtest[2], false);
            if (angles[0] >= 180) angles[0] -= 360;
            if (angles[1] >= 180) angles[1] -= 360;
            if (angles[2] >= 180) angles[2] -= 360;
 
#if 0
{
            float a = DEG2RAD(angles[ROLL]);
            float b = DEG2RAD(angles[PITCH]);
            float c = DEG2RAD(angles[YAW]);
            float cy, sy, cp, sp, cr, sr;
            float test[4][3];
            // smd matrix construction, for comparing
            sy = sin(c);
            cy = cos(c);
            sp = sin(b);
            cp = cos(b);
            sr = sin(a);
            cr = cos(a);
 
            test[0][0] = cp*cy;
            test[0][1] = cp*sy;
            test[0][2] = -sp;
            test[1][0] = sr*sp*cy+cr*-sy;
            test[1][1] = sr*sp*sy+cr*cy;
            test[1][2] = sr*cp;
            test[2][0] = (cr*sp*cy+-sr*-sy);
            test[2][1] = (cr*sp*sy+-sr*cy);
            test[2][2] = cr*cp;
            test[3][0] = pose[9];
            test[3][1] = pose[10];
            test[3][2] = pose[11];
}
#endif
            l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f\n", transformindex, mtest[3][0], mtest[3][1], mtest[3][2], DEG2RAD(angles[ROLL]), DEG2RAD(angles[PITCH]), DEG2RAD(angles[YAW]));
            if (l > 0)
                outbufferpos += l;
        }
    }
    l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "end\n");
    if (l > 0)
        outbufferpos += l;
    if (writetriangles)
    {
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "triangles\n");
        if (l > 0)
            outbufferpos += l;
        for (surfaceindex = 0, surface = model->data_surfaces;surfaceindex < model->num_surfaces;surfaceindex++, surface++)
        {
            for (triangleindex = 0, e = model->surfmesh.data_element3i + surface->num_firsttriangle * 3;triangleindex < surface->num_triangles;triangleindex++, e += 3)
            {
                counttriangles++;
                if (outbufferpos >= outbuffermax >> 1)
                {
                    outbuffermax *= 2;
                    oldbuffer = outbuffer;
                    outbuffer = (char *) Z_Malloc(outbuffermax);
                    memcpy(outbuffer, oldbuffer, outbufferpos);
                    Z_Free(oldbuffer);
                }
                l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%s\n", surface->texture && surface->texture->name[0] ? surface->texture->name : "default.bmp");
                if (l > 0)
                    outbufferpos += l;
                for (cornerindex = 0;cornerindex < 3;cornerindex++)
                {
                    const int index = e[2-cornerindex];
                    const float *v = model->surfmesh.data_vertex3f + index * 3;
                    const float *vn = model->surfmesh.data_normal3f + index * 3;
                    const float *vt = model->surfmesh.data_texcoordtexture2f + index * 2;
                    const int b = model->surfmesh.blends[index];
                    if (b < model->num_bones)
                        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f %f %f\n"                          , b, v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1 - vt[1]);
                    else
                    {
                        const blendweights_t *w = model->surfmesh.data_blendweights + b - model->num_bones;
                        const unsigned char *wi = w->index;
                        const unsigned char *wf = w->influence;
                        if (wf[3]) l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f %f %f 4 %i %f %i %f %i %f %i %f\n", wi[0], v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1 - vt[1], wi[0], wf[0]/255.0f, wi[1], wf[1]/255.0f, wi[2], wf[2]/255.0f, wi[3], wf[3]/255.0f);
                        else if (wf[2]) l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f %f %f 3 %i %f %i %f %i %f\n"      , wi[0], v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1 - vt[1], wi[0], wf[0]/255.0f, wi[1], wf[1]/255.0f, wi[2], wf[2]/255.0f);
                        else if (wf[1]) l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f %f %f 2 %i %f %i %f\n"            , wi[0], v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1 - vt[1], wi[0], wf[0]/255.0f, wi[1], wf[1]/255.0f);
                        else            l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "%3i %f %f %f %f %f %f %f %f\n"                          , wi[0], v[0], v[1], v[2], vn[0], vn[1], vn[2], vt[0], 1 - vt[1]);
                    }
                    if (l > 0)
                        outbufferpos += l;
                }
            }
        }
        l = dpsnprintf(outbuffer + outbufferpos, outbuffermax - outbufferpos, "end\n");
        if (l > 0)
            outbufferpos += l;
    }
 
    FS_WriteFile(filename, outbuffer, outbufferpos);
    Z_Free(outbuffer);
 
    Con_Printf("Wrote %s (%i bytes, %i nodes, %i frames, %i triangles)\n", filename, (int)outbufferpos, countnodes, countframes, counttriangles);
}
 
/*
================
Mod_Decompile_f
 
decompiles a model to editable files
================
*/
static void Mod_Decompile_f(cmd_state_t *cmd)
{
    int i, j, k, l, first, count;
    model_t *mod;
    char inname[MAX_QPATH];
    char outname[MAX_QPATH];
    char mtlname[MAX_QPATH];
    char basename[MAX_QPATH];
    char animname[MAX_QPATH];
    char animname2[MAX_QPATH];
    char zymtextbuffer[16384];
    char dpmtextbuffer[16384];
    char framegroupstextbuffer[16384];
    int zymtextsize = 0;
    int dpmtextsize = 0;
    int framegroupstextsize = 0;
    char vabuf[1024];
 
    if (Cmd_Argc(cmd) != 2)
    {
        Con_Print("usage: modeldecompile <filename>\n");
        return;
    }
 
    dp_strlcpy(inname, Cmd_Argv(cmd, 1), sizeof(inname));
    FS_StripExtension(inname, basename, sizeof(basename));
 
    mod = Mod_ForName(inname, false, true, inname[0] == '*' ? cl.model_name[1] : NULL);
    if (!mod)
    {
        Con_Print("No such model\n");
        return;
    }
    if (mod->brush.submodel)
    {
        // if we're decompiling a submodel, be sure to give it a proper name based on its parent
        FS_StripExtension(cl.model_name[1], outname, sizeof(outname));
        dpsnprintf(basename, sizeof(basename), "%s/%s", outname, mod->name);
        outname[0] = 0;
    }
    if (!mod->surfmesh.num_triangles)
    {
        Con_Print("Empty model (or sprite)\n");
        return;
    }
 
    // export OBJ if possible (not on sprites)
    if (mod->surfmesh.num_triangles)
    {
        dpsnprintf(outname, sizeof(outname), "%s_decompiled.obj", basename);
        dpsnprintf(mtlname, sizeof(mtlname), "%s_decompiled.mtl", basename);
        Mod_Decompile_OBJ(mod, outname, mtlname, inname);
    }
 
    // export SMD if possible (only for skeletal models)
    if (mod->surfmesh.num_triangles && mod->num_bones)
    {
        dpsnprintf(outname, sizeof(outname), "%s_decompiled/ref1.smd", basename);
        Mod_Decompile_SMD(mod, outname, 0, 1, true);
        l = dpsnprintf(zymtextbuffer + zymtextsize, sizeof(zymtextbuffer) - zymtextsize, "output out.zym\nscale 1\norigin 0 0 0\nmesh ref1.smd\n");
        if (l > 0) zymtextsize += l;
        l = dpsnprintf(dpmtextbuffer + dpmtextsize, sizeof(dpmtextbuffer) - dpmtextsize, "outputdir .\nmodel out\nscale 1\norigin 0 0 0\nscene ref1.smd\n");
        if (l > 0) dpmtextsize += l;
        for (i = 0;i < mod->numframes;i = j)
        {
            dp_strlcpy(animname, mod->animscenes[i].name, sizeof(animname));
            first = mod->animscenes[i].firstframe;
            if (mod->animscenes[i].framecount > 1)
            {
                // framegroup anim
                count = mod->animscenes[i].framecount;
                j = i + 1;
            }
            else
            {
                // individual frame
                // check for additional frames with same name
                for (l = 0, k = (int)strlen(animname);animname[l];l++)
                    if(animname[l] < '0' || animname[l] > '9')
                        k = l + 1;
                if(k > 0 && animname[k-1] == '_')
                    --k;
                animname[k] = 0;
                count = mod->num_poses - first;
                for (j = i + 1;j < mod->numframes;j++)
                {
                    dp_strlcpy(animname2, mod->animscenes[j].name, sizeof(animname2));
                    for (l = 0, k = (int)strlen(animname2);animname2[l];l++)
                        if(animname2[l] < '0' || animname2[l] > '9')
                            k = l + 1;
                    if(k > 0 && animname[k-1] == '_')
                        --k;
                    animname2[k] = 0;
                    if (strcmp(animname2, animname) || mod->animscenes[j].framecount > 1)
                    {
                        count = mod->animscenes[j].firstframe - first;
                        break;
                    }
                }
                // if it's only one frame, use the original frame name
                if (j == i + 1)
                    dp_strlcpy(animname, mod->animscenes[i].name, sizeof(animname));
                
            }
            dpsnprintf(outname, sizeof(outname), "%s_decompiled/%s.smd", basename, animname);
            Mod_Decompile_SMD(mod, outname, first, count, false);
            if (zymtextsize < (int)sizeof(zymtextbuffer) - 100)
            {
                l = dpsnprintf(zymtextbuffer + zymtextsize, sizeof(zymtextbuffer) - zymtextsize, "scene %s.smd fps %g %s\n", animname, mod->animscenes[i].framerate, mod->animscenes[i].loop ? "" : " noloop");
                if (l > 0) zymtextsize += l;
            }
            if (dpmtextsize < (int)sizeof(dpmtextbuffer) - 100)
            {
                l = dpsnprintf(dpmtextbuffer + dpmtextsize, sizeof(dpmtextbuffer) - dpmtextsize, "scene %s.smd fps %g %s\n", animname, mod->animscenes[i].framerate, mod->animscenes[i].loop ? "" : " noloop");
                if (l > 0) dpmtextsize += l;
            }
            if (framegroupstextsize < (int)sizeof(framegroupstextbuffer) - 100)
            {
                l = dpsnprintf(framegroupstextbuffer + framegroupstextsize, sizeof(framegroupstextbuffer) - framegroupstextsize, "%d %d %f %d // %s\n", first, count, mod->animscenes[i].framerate, mod->animscenes[i].loop, animname);
                if (l > 0) framegroupstextsize += l;
            }
        }
        if (zymtextsize)
            FS_WriteFile(va(vabuf, sizeof(vabuf), "%s_decompiled/out_zym.txt", basename), zymtextbuffer, (fs_offset_t)zymtextsize);
        if (dpmtextsize)
            FS_WriteFile(va(vabuf, sizeof(vabuf), "%s_decompiled/out_dpm.txt", basename), dpmtextbuffer, (fs_offset_t)dpmtextsize);
        if (framegroupstextsize)
            FS_WriteFile(va(vabuf, sizeof(vabuf), "%s_decompiled.framegroups", basename), framegroupstextbuffer, (fs_offset_t)framegroupstextsize);
    }
}
 
void Mod_AllocLightmap_Init(mod_alloclightmap_state_t *state, mempool_t *mempool, int width, int height)
{
    int y;
    memset(state, 0, sizeof(*state));
    state->width = width;
    state->height = height;
    state->currentY = 0;
    state->rows = (mod_alloclightmap_row_t *)Mem_Alloc(mempool, state->height * sizeof(*state->rows));
    for (y = 0;y < state->height;y++)
    {
        state->rows[y].currentX = 0;
        state->rows[y].rowY = -1;
    }
}
 
void Mod_AllocLightmap_Reset(mod_alloclightmap_state_t *state)
{
    int y;
    state->currentY = 0;
    for (y = 0;y < state->height;y++)
    {
        state->rows[y].currentX = 0;
        state->rows[y].rowY = -1;
    }
}
 
void Mod_AllocLightmap_Free(mod_alloclightmap_state_t *state)
{
    if (state->rows)
        Mem_Free(state->rows);
    memset(state, 0, sizeof(*state));
}
 
qbool Mod_AllocLightmap_Block(mod_alloclightmap_state_t *state, int blockwidth, int blockheight, int *outx, int *outy)
{
    mod_alloclightmap_row_t *row;
    int y;
 
    row = state->rows + blockheight;
    if ((row->rowY < 0) || (row->currentX + blockwidth > state->width))
    {
        if (state->currentY + blockheight <= state->height)
        {
            // use the current allocation position
            row->rowY = state->currentY;
            row->currentX = 0;
            state->currentY += blockheight;
        }
        else
        {
            // find another position
            for (y = blockheight;y < state->height;y++)
            {
                if ((state->rows[y].rowY >= 0) && (state->rows[y].currentX + blockwidth <= state->width))
                {
                    row = state->rows + y;
                    break;
                }
            }
            if (y == state->height)
                return false;
        }
    }
    *outy = row->rowY;
    *outx = row->currentX;
    row->currentX += blockwidth;
 
    return true;
}
 
typedef struct lightmapsample_s
{
    float pos[3];
    float sh1[4][3];
    float *vertex_color;
    unsigned char *lm_bgr;
    unsigned char *lm_dir;
}
lightmapsample_t;
 
typedef struct lightmapvertex_s
{
    int index;
    float pos[3];
    float normal[3];
    float texcoordbase[2];
    float texcoordlightmap[2];
    float lightcolor[4];
}
lightmapvertex_t;
 
typedef struct lightmaptriangle_s
{
    int triangleindex;
    int surfaceindex;
    int lightmapindex;
    int axis;
    int lmoffset[2];
    int lmsize[2];
    // 2D modelspace coordinates of min corner
    // snapped to lightmap grid but not in grid coordinates
    float lmbase[2];
    // 2D modelspace to lightmap coordinate scale
    float lmscale[2];
    float vertex[3][3];
    float mins[3];
    float maxs[3];
}
lightmaptriangle_t;
 
typedef struct lightmaplight_s
{
    float origin[3];
    float radius;
    float iradius;
    float radius2;
    float color[3];
    svbsp_t svbsp;
}
lightmaplight_t;
 
lightmaptriangle_t *mod_generatelightmaps_lightmaptriangles;
 
#define MAX_LIGHTMAPSAMPLES 64
static int mod_generatelightmaps_numoffsets[3];
static float mod_generatelightmaps_offsets[3][MAX_LIGHTMAPSAMPLES][3];
 
static int mod_generatelightmaps_numlights;
static lightmaplight_t *mod_generatelightmaps_lightinfo;
 
extern cvar_t r_shadow_lightattenuationdividebias;
extern cvar_t r_shadow_lightattenuationlinearscale;
 
static void Mod_GenerateLightmaps_LightPoint(model_t *model, const vec3_t pos, vec3_t ambient, vec3_t diffuse, vec3_t lightdir)
{
    int i;
    int index;
    int result;
    float relativepoint[3];
    float color[3];
    float dir[3];
    float dist;
    float dist2;
    float intensity;
    float sample[5*3];
    float lightorigin[3];
    float lightradius;
    float lightradius2;
    float lightiradius;
    float lightcolor[3];
    trace_t trace;
    for (i = 0;i < 5*3;i++)
        sample[i] = 0.0f;
    for (index = 0;;index++)
    {
        result = R_Shadow_GetRTLightInfo(index, lightorigin, &lightradius, lightcolor);
        if (result < 0)
            break;
        if (result == 0)
            continue;
        lightradius2 = lightradius * lightradius;
        VectorSubtract(lightorigin, pos, relativepoint);
        dist2 = VectorLength2(relativepoint);
        if (dist2 >= lightradius2)
            continue;
        lightiradius = 1.0f / lightradius;
        dist = sqrt(dist2) * lightiradius;
        intensity = (1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist);
        if (intensity <= 0.0f)
            continue;
        if (model && model->TraceLine)
        {
            model->TraceLine(model, NULL, NULL, &trace, pos, lightorigin, SUPERCONTENTS_SOLID, 0, MATERIALFLAGMASK_TRANSLUCENT | MATERIALFLAG_NOSHADOW);
            if (trace.fraction < 1)
                continue;
        }
        // scale down intensity to add to both ambient and diffuse
        //intensity *= 0.5f;
        VectorNormalize(relativepoint);
        VectorScale(lightcolor, intensity, color);
        VectorMA(sample    , 0.5f            , color, sample    );
        VectorMA(sample + 3, relativepoint[0], color, sample + 3);
        VectorMA(sample + 6, relativepoint[1], color, sample + 6);
        VectorMA(sample + 9, relativepoint[2], color, sample + 9);
        // calculate a weighted average light direction as well
        intensity *= VectorLength(color);
        VectorMA(sample + 12, intensity, relativepoint, sample + 12);
    }
    // calculate the direction we'll use to reduce the sample to a directional light source
    VectorCopy(sample + 12, dir);
    //VectorSet(dir, sample[3] + sample[4] + sample[5], sample[6] + sample[7] + sample[8], sample[9] + sample[10] + sample[11]);
    VectorNormalize(dir);
    // extract the diffuse color along the chosen direction and scale it
    diffuse[0] = (dir[0]*sample[3] + dir[1]*sample[6] + dir[2]*sample[ 9] + sample[ 0]);
    diffuse[1] = (dir[0]*sample[4] + dir[1]*sample[7] + dir[2]*sample[10] + sample[ 1]);
    diffuse[2] = (dir[0]*sample[5] + dir[1]*sample[8] + dir[2]*sample[11] + sample[ 2]);
    // subtract some of diffuse from ambient
    VectorMA(sample, -0.333f, diffuse, ambient);
    // store the normalized lightdir
    VectorCopy(dir, lightdir);
}
 
static void Mod_GenerateLightmaps_CreateLights_ComputeSVBSP_InsertSurfaces(const model_t *model, svbsp_t *svbsp, const float *mins, const float *maxs)
{
    int surfaceindex;
    int triangleindex;
    const msurface_t *surface;
    const float *vertex3f = model->surfmesh.data_vertex3f;
    const int *element3i = model->surfmesh.data_element3i;
    const int *e;
    float v2[3][3];
    for (surfaceindex = model->submodelsurfaces_start;surfaceindex < model->submodelsurfaces_end;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        if (!BoxesOverlap(surface->mins, surface->maxs, mins, maxs))
            continue;
        if (surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW)
            continue;
        for (triangleindex = 0, e = element3i + 3*surface->num_firsttriangle;triangleindex < surface->num_triangles;triangleindex++, e += 3)
        {
            VectorCopy(vertex3f + 3*e[0], v2[0]);
            VectorCopy(vertex3f + 3*e[1], v2[1]);
            VectorCopy(vertex3f + 3*e[2], v2[2]);
            SVBSP_AddPolygon(svbsp, 3, v2[0], true, NULL, NULL, 0);
        }
    }
}
 
static void Mod_GenerateLightmaps_CreateLights_ComputeSVBSP(model_t *model, lightmaplight_t *lightinfo)
{
    int maxnodes = 1<<14;
    svbsp_node_t *nodes;
    float origin[3];
    float mins[3];
    float maxs[3];
    svbsp_t svbsp;
    VectorSet(mins, lightinfo->origin[0] - lightinfo->radius, lightinfo->origin[1] - lightinfo->radius, lightinfo->origin[2] - lightinfo->radius);
    VectorSet(maxs, lightinfo->origin[0] + lightinfo->radius, lightinfo->origin[1] + lightinfo->radius, lightinfo->origin[2] + lightinfo->radius);
    VectorCopy(lightinfo->origin, origin);
    nodes = (svbsp_node_t *)Mem_Alloc(tempmempool, maxnodes * sizeof(*nodes));
    for (;;)
    {
        SVBSP_Init(&svbsp, origin, maxnodes, nodes);
        Mod_GenerateLightmaps_CreateLights_ComputeSVBSP_InsertSurfaces(model, &svbsp, mins, maxs);
        if (svbsp.ranoutofnodes)
        {
            maxnodes *= 16;
            if (maxnodes > 1<<22)
            {
                Mem_Free(nodes);
                return;
            }
            Mem_Free(nodes);
            nodes = (svbsp_node_t *)Mem_Alloc(tempmempool, maxnodes * sizeof(*nodes));
        }
        else
            break;
    }
    if (svbsp.numnodes > 0)
    {
        svbsp.nodes = (svbsp_node_t *)Mem_Alloc(tempmempool, svbsp.numnodes * sizeof(*nodes));
        memcpy(svbsp.nodes, nodes, svbsp.numnodes * sizeof(*nodes));
        lightinfo->svbsp = svbsp;
    }
    Mem_Free(nodes);
}
 
static void Mod_GenerateLightmaps_CreateLights(model_t *model)
{
    int index;
    int result;
    lightmaplight_t *lightinfo;
    float origin[3];
    float radius;
    float color[3];
    mod_generatelightmaps_numlights = 0;
    for (index = 0;;index++)
    {
        result = R_Shadow_GetRTLightInfo(index, origin, &radius, color);
        if (result < 0)
            break;
        if (result > 0)
            mod_generatelightmaps_numlights++;
    }
    if (mod_generatelightmaps_numlights > 0)
    {
        mod_generatelightmaps_lightinfo = (lightmaplight_t *)Mem_Alloc(tempmempool, mod_generatelightmaps_numlights * sizeof(*mod_generatelightmaps_lightinfo));
        lightinfo = mod_generatelightmaps_lightinfo;
        for (index = 0;;index++)
        {
            result = R_Shadow_GetRTLightInfo(index, lightinfo->origin, &lightinfo->radius, lightinfo->color);
            if (result < 0)
                break;
            if (result > 0)
                lightinfo++;
        }
    }
    for (index = 0, lightinfo = mod_generatelightmaps_lightinfo;index < mod_generatelightmaps_numlights;index++, lightinfo++)
    {
        lightinfo->iradius = 1.0f / lightinfo->radius;
        lightinfo->radius2 = lightinfo->radius * lightinfo->radius;
        // TODO: compute svbsp
        Mod_GenerateLightmaps_CreateLights_ComputeSVBSP(model, lightinfo);
    }
}
 
static void Mod_GenerateLightmaps_DestroyLights(model_t *model)
{
    int i;
    if (mod_generatelightmaps_lightinfo)
    {
        for (i = 0;i < mod_generatelightmaps_numlights;i++)
            if (mod_generatelightmaps_lightinfo[i].svbsp.nodes)
                Mem_Free(mod_generatelightmaps_lightinfo[i].svbsp.nodes);
        Mem_Free(mod_generatelightmaps_lightinfo);
    }
    mod_generatelightmaps_lightinfo = NULL;
    mod_generatelightmaps_numlights = 0;
}
 
static qbool Mod_GenerateLightmaps_SamplePoint_SVBSP(const svbsp_t *svbsp, const float *pos)
{
    const svbsp_node_t *node;
    const svbsp_node_t *nodes = svbsp->nodes;
    int num = 0;
    while (num >= 0)
    {
        node = nodes + num;
        num = node->children[DotProduct(node->plane, pos) < node->plane[3]];
    }
    return num == -1; // true if empty, false if solid (shadowed)
}
 
static void Mod_GenerateLightmaps_SamplePoint(const float *pos, const float *normal, float *sample, int numoffsets, const float *offsets)
{
    int i;
    float relativepoint[3];
    float color[3];
    float offsetpos[3];
    float dist;
    float dist2;
    float intensity;
    int offsetindex;
    int hits;
    int tests;
    const lightmaplight_t *lightinfo;
    trace_t trace;
    for (i = 0;i < 5*3;i++)
        sample[i] = 0.0f;
    for (i = 0, lightinfo = mod_generatelightmaps_lightinfo;i < mod_generatelightmaps_numlights;i++, lightinfo++)
    {
        //R_SampleRTLights(pos, sample, numoffsets, offsets);
        VectorSubtract(lightinfo->origin, pos, relativepoint);
        // don't accept light from behind a surface, it causes bad shading
        if (normal && DotProduct(relativepoint, normal) <= 0)
            continue;
        dist2 = VectorLength2(relativepoint);
        if (dist2 >= lightinfo->radius2)
            continue;
        dist = sqrt(dist2) * lightinfo->iradius;
        intensity = dist < 1 ? ((1.0f - dist) * r_shadow_lightattenuationlinearscale.value / (r_shadow_lightattenuationdividebias.value + dist*dist)) : 0;
        if (intensity <= 0)
            continue;
        if (cl.worldmodel && cl.worldmodel->TraceLine && numoffsets > 0)
        {
            hits = 0;
            tests = 1;
            if (Mod_GenerateLightmaps_SamplePoint_SVBSP(&lightinfo->svbsp, pos))
                hits++;
            for (offsetindex = 1;offsetindex < numoffsets;offsetindex++)
            {
                VectorAdd(pos, offsets + 3*offsetindex, offsetpos);
                if (!normal)
                {
                    // for light grid we'd better check visibility of the offset point
                    cl.worldmodel->TraceLine(cl.worldmodel, NULL, NULL, &trace, pos, offsetpos, SUPERCONTENTS_SOLID, 0, MATERIALFLAGMASK_TRANSLUCENT | MATERIALFLAG_NOSHADOW);
                    if (trace.fraction < 1)
                        VectorLerp(pos, trace.fraction, offsetpos, offsetpos);
                }
                tests++;
                if (Mod_GenerateLightmaps_SamplePoint_SVBSP(&lightinfo->svbsp, offsetpos))
                    hits++;
            }
            if (!hits)
                continue;
            // scale intensity according to how many rays succeeded
            // we know one test is valid, half of the rest will fail...
            //if (normal && tests > 1)
            //  intensity *= (tests - 1.0f) / tests;
            intensity *= (float)hits / tests;
        }
        // scale down intensity to add to both ambient and diffuse
        //intensity *= 0.5f;
        VectorNormalize(relativepoint);
        VectorScale(lightinfo->color, intensity, color);
        VectorMA(sample    , 0.5f            , color, sample    );
        VectorMA(sample + 3, relativepoint[0], color, sample + 3);
        VectorMA(sample + 6, relativepoint[1], color, sample + 6);
        VectorMA(sample + 9, relativepoint[2], color, sample + 9);
        // calculate a weighted average light direction as well
        intensity *= VectorLength(color);
        VectorMA(sample + 12, intensity, relativepoint, sample + 12);
    }
}
 
static void Mod_GenerateLightmaps_LightmapSample(const float *pos, const float *normal, unsigned char *lm_bgr, unsigned char *lm_dir)
{
    float sample[5*3];
    float color[3];
    float dir[3];
    float f;
    Mod_GenerateLightmaps_SamplePoint(pos, normal, sample, mod_generatelightmaps_numoffsets[0], mod_generatelightmaps_offsets[0][0]);
    //VectorSet(dir, sample[3] + sample[4] + sample[5], sample[6] + sample[7] + sample[8], sample[9] + sample[10] + sample[11]);
    VectorCopy(sample + 12, dir);
    VectorNormalize(dir);
    //VectorAdd(dir, normal, dir);
    //VectorNormalize(dir);
    f = DotProduct(dir, normal);
    f = max(0, f) * 255.0f;
    VectorScale(sample, f, color);
    //VectorCopy(normal, dir);
    VectorSet(dir, (dir[0]+1.0f)*127.5f, (dir[1]+1.0f)*127.5f, (dir[2]+1.0f)*127.5f);
    lm_bgr[0] = (unsigned char)bound(0.0f, color[2], 255.0f);
    lm_bgr[1] = (unsigned char)bound(0.0f, color[1], 255.0f);
    lm_bgr[2] = (unsigned char)bound(0.0f, color[0], 255.0f);
    lm_bgr[3] = 255;
    lm_dir[0] = (unsigned char)dir[2];
    lm_dir[1] = (unsigned char)dir[1];
    lm_dir[2] = (unsigned char)dir[0];
    lm_dir[3] = 255;
}
 
static void Mod_GenerateLightmaps_VertexSample(const float *pos, const float *normal, float *vertex_color)
{
    float sample[5*3];
    Mod_GenerateLightmaps_SamplePoint(pos, normal, sample, mod_generatelightmaps_numoffsets[1], mod_generatelightmaps_offsets[1][0]);
    VectorCopy(sample, vertex_color);
}
 
static void Mod_GenerateLightmaps_GridSample(const float *pos, q3dlightgrid_t *s)
{
    float sample[5*3];
    float ambient[3];
    float diffuse[3];
    float dir[3];
    Mod_GenerateLightmaps_SamplePoint(pos, NULL, sample, mod_generatelightmaps_numoffsets[2], mod_generatelightmaps_offsets[2][0]);
    // calculate the direction we'll use to reduce the sample to a directional light source
    VectorCopy(sample + 12, dir);
    //VectorSet(dir, sample[3] + sample[4] + sample[5], sample[6] + sample[7] + sample[8], sample[9] + sample[10] + sample[11]);
    VectorNormalize(dir);
    // extract the diffuse color along the chosen direction and scale it
    diffuse[0] = (dir[0]*sample[3] + dir[1]*sample[6] + dir[2]*sample[ 9] + sample[ 0]) * 127.5f;
    diffuse[1] = (dir[0]*sample[4] + dir[1]*sample[7] + dir[2]*sample[10] + sample[ 1]) * 127.5f;
    diffuse[2] = (dir[0]*sample[5] + dir[1]*sample[8] + dir[2]*sample[11] + sample[ 2]) * 127.5f;
    // scale the ambient from 0-2 to 0-255 and subtract some of diffuse
    VectorScale(sample, 127.5f, ambient);
    VectorMA(ambient, -0.333f, diffuse, ambient);
    // encode to the grid format
    s->ambientrgb[0] = (unsigned char)bound(0.0f, ambient[0], 255.0f);
    s->ambientrgb[1] = (unsigned char)bound(0.0f, ambient[1], 255.0f);
    s->ambientrgb[2] = (unsigned char)bound(0.0f, ambient[2], 255.0f);
    s->diffusergb[0] = (unsigned char)bound(0.0f, diffuse[0], 255.0f);
    s->diffusergb[1] = (unsigned char)bound(0.0f, diffuse[1], 255.0f);
    s->diffusergb[2] = (unsigned char)bound(0.0f, diffuse[2], 255.0f);
    if (dir[2] >= 0.99f) {s->diffusepitch = 0;s->diffuseyaw = 0;}
    else if (dir[2] <= -0.99f) {s->diffusepitch = 128;s->diffuseyaw = 0;}
    else {s->diffusepitch = (unsigned char)(acos(dir[2]) * (127.5f/M_PI));s->diffuseyaw = (unsigned char)(atan2(dir[1], dir[0]) * (127.5f/M_PI));}
}
 
static void Mod_GenerateLightmaps_InitSampleOffsets(model_t *model)
{
    float radius[3];
    float temp[3];
    int i, j;
    memset(mod_generatelightmaps_offsets, 0, sizeof(mod_generatelightmaps_offsets));
    mod_generatelightmaps_numoffsets[0] = min(MAX_LIGHTMAPSAMPLES, mod_generatelightmaps_lightmapsamples.integer);
    mod_generatelightmaps_numoffsets[1] = min(MAX_LIGHTMAPSAMPLES, mod_generatelightmaps_vertexsamples.integer);
    mod_generatelightmaps_numoffsets[2] = min(MAX_LIGHTMAPSAMPLES, mod_generatelightmaps_gridsamples.integer);
    radius[0] = mod_generatelightmaps_lightmapradius.value;
    radius[1] = mod_generatelightmaps_vertexradius.value;
    radius[2] = mod_generatelightmaps_gridradius.value;
    for (i = 0;i < 3;i++)
    {
        for (j = 1;j < mod_generatelightmaps_numoffsets[i];j++)
        {
            VectorRandom(temp);
            VectorScale(temp, radius[i], mod_generatelightmaps_offsets[i][j]);
        }
    }
}
 
static void Mod_GenerateLightmaps_DestroyLightmaps(model_t *model)
{
    msurface_t *surface;
    int surfaceindex;
    int i;
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        surface->lightmaptexture = NULL;
        surface->deluxemaptexture = NULL;
    }
    if (model->brushq3.data_lightmaps)
    {
        for (i = 0;i < model->brushq3.num_mergedlightmaps;i++)
            if (model->brushq3.data_lightmaps[i])
                R_FreeTexture(model->brushq3.data_lightmaps[i]);
        Mem_Free(model->brushq3.data_lightmaps);
        model->brushq3.data_lightmaps = NULL;
    }
    if (model->brushq3.data_deluxemaps)
    {
        for (i = 0;i < model->brushq3.num_mergedlightmaps;i++)
            if (model->brushq3.data_deluxemaps[i])
                R_FreeTexture(model->brushq3.data_deluxemaps[i]);
        Mem_Free(model->brushq3.data_deluxemaps);
        model->brushq3.data_deluxemaps = NULL;
    }
}
 
static void Mod_GenerateLightmaps_UnweldTriangles(model_t *model)
{
    msurface_t *surface;
    int surfaceindex;
    int vertexindex;
    int outvertexindex;
    int i;
    const int *e;
    surfmesh_t oldsurfmesh;
    size_t size;
    unsigned char *data;
    oldsurfmesh = model->surfmesh;
    model->surfmesh.num_triangles = oldsurfmesh.num_triangles;
    model->surfmesh.num_vertices = oldsurfmesh.num_triangles * 3;
    size = 0;
    size += model->surfmesh.num_vertices * sizeof(float[3]);
    size += model->surfmesh.num_vertices * sizeof(float[3]);
    size += model->surfmesh.num_vertices * sizeof(float[3]);
    size += model->surfmesh.num_vertices * sizeof(float[3]);
    size += model->surfmesh.num_vertices * sizeof(float[2]);
    size += model->surfmesh.num_vertices * sizeof(float[2]);
    size += model->surfmesh.num_vertices * sizeof(float[4]);
    data = (unsigned char *)Mem_Alloc(model->mempool, size);
    model->surfmesh.data_vertex3f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[3]);
    model->surfmesh.data_normal3f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[3]);
    model->surfmesh.data_svector3f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[3]);
    model->surfmesh.data_tvector3f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[3]);
    model->surfmesh.data_texcoordtexture2f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[2]);
    model->surfmesh.data_texcoordlightmap2f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[2]);
    model->surfmesh.data_lightmapcolor4f = (float *)data;data += model->surfmesh.num_vertices * sizeof(float[4]);
    if (model->surfmesh.num_vertices > 65536)
        model->surfmesh.data_element3s = NULL;
 
    if (model->surfmesh.data_element3i_indexbuffer && !model->surfmesh.data_element3i_indexbuffer->isdynamic)
        R_Mesh_DestroyMeshBuffer(model->surfmesh.data_element3i_indexbuffer);
    model->surfmesh.data_element3i_indexbuffer = NULL;
    if (model->surfmesh.data_element3s_indexbuffer && !model->surfmesh.data_element3s_indexbuffer->isdynamic)
        R_Mesh_DestroyMeshBuffer(model->surfmesh.data_element3s_indexbuffer);
    model->surfmesh.data_element3s_indexbuffer = NULL;
    if (model->surfmesh.data_vertex3f_vertexbuffer && !model->surfmesh.data_vertex3f_vertexbuffer->isdynamic)
        R_Mesh_DestroyMeshBuffer(model->surfmesh.data_vertex3f_vertexbuffer);
    model->surfmesh.data_vertex3f_vertexbuffer = NULL;
    model->surfmesh.data_svector3f_vertexbuffer = NULL;
    model->surfmesh.data_tvector3f_vertexbuffer = NULL;
    model->surfmesh.data_normal3f_vertexbuffer = NULL;
    model->surfmesh.data_texcoordtexture2f_vertexbuffer = NULL;
    model->surfmesh.data_texcoordlightmap2f_vertexbuffer = NULL;
    model->surfmesh.data_lightmapcolor4f_vertexbuffer = NULL;
    model->surfmesh.data_skeletalindex4ub_vertexbuffer = NULL;
    model->surfmesh.data_skeletalweight4ub_vertexbuffer = NULL;
 
    // convert all triangles to unique vertex data
    outvertexindex = 0;
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        surface->num_firstvertex = outvertexindex;
        surface->num_vertices = surface->num_triangles*3;
        e = oldsurfmesh.data_element3i + surface->num_firsttriangle*3;
        for (i = 0;i < surface->num_triangles*3;i++)
        {
            vertexindex = e[i];
            model->surfmesh.data_vertex3f[outvertexindex*3+0] = oldsurfmesh.data_vertex3f[vertexindex*3+0];
            model->surfmesh.data_vertex3f[outvertexindex*3+1] = oldsurfmesh.data_vertex3f[vertexindex*3+1];
            model->surfmesh.data_vertex3f[outvertexindex*3+2] = oldsurfmesh.data_vertex3f[vertexindex*3+2];
            model->surfmesh.data_normal3f[outvertexindex*3+0] = oldsurfmesh.data_normal3f[vertexindex*3+0];
            model->surfmesh.data_normal3f[outvertexindex*3+1] = oldsurfmesh.data_normal3f[vertexindex*3+1];
            model->surfmesh.data_normal3f[outvertexindex*3+2] = oldsurfmesh.data_normal3f[vertexindex*3+2];
            model->surfmesh.data_svector3f[outvertexindex*3+0] = oldsurfmesh.data_svector3f[vertexindex*3+0];
            model->surfmesh.data_svector3f[outvertexindex*3+1] = oldsurfmesh.data_svector3f[vertexindex*3+1];
            model->surfmesh.data_svector3f[outvertexindex*3+2] = oldsurfmesh.data_svector3f[vertexindex*3+2];
            model->surfmesh.data_tvector3f[outvertexindex*3+0] = oldsurfmesh.data_tvector3f[vertexindex*3+0];
            model->surfmesh.data_tvector3f[outvertexindex*3+1] = oldsurfmesh.data_tvector3f[vertexindex*3+1];
            model->surfmesh.data_tvector3f[outvertexindex*3+2] = oldsurfmesh.data_tvector3f[vertexindex*3+2];
            model->surfmesh.data_texcoordtexture2f[outvertexindex*2+0] = oldsurfmesh.data_texcoordtexture2f[vertexindex*2+0];
            model->surfmesh.data_texcoordtexture2f[outvertexindex*2+1] = oldsurfmesh.data_texcoordtexture2f[vertexindex*2+1];
            if (oldsurfmesh.data_texcoordlightmap2f)
            {
                model->surfmesh.data_texcoordlightmap2f[outvertexindex*2+0] = oldsurfmesh.data_texcoordlightmap2f[vertexindex*2+0];
                model->surfmesh.data_texcoordlightmap2f[outvertexindex*2+1] = oldsurfmesh.data_texcoordlightmap2f[vertexindex*2+1];
            }
            if (oldsurfmesh.data_lightmapcolor4f)
            {
                model->surfmesh.data_lightmapcolor4f[outvertexindex*4+0] = oldsurfmesh.data_lightmapcolor4f[vertexindex*4+0];
                model->surfmesh.data_lightmapcolor4f[outvertexindex*4+1] = oldsurfmesh.data_lightmapcolor4f[vertexindex*4+1];
                model->surfmesh.data_lightmapcolor4f[outvertexindex*4+2] = oldsurfmesh.data_lightmapcolor4f[vertexindex*4+2];
                model->surfmesh.data_lightmapcolor4f[outvertexindex*4+3] = oldsurfmesh.data_lightmapcolor4f[vertexindex*4+3];
            }
            else
                Vector4Set(model->surfmesh.data_lightmapcolor4f + 4*outvertexindex, 1, 1, 1, 1);
            model->surfmesh.data_element3i[surface->num_firsttriangle*3+i] = outvertexindex;
            outvertexindex++;
        }
    }
    if (model->surfmesh.data_element3s)
        for (i = 0;i < model->surfmesh.num_triangles*3;i++)
            model->surfmesh.data_element3s[i] = model->surfmesh.data_element3i[i];
 
    // find and update all submodels to use this new surfmesh data
    for (i = 0;i < model->brush.numsubmodels;i++)
        model->brush.submodels[i]->surfmesh = model->surfmesh;
}
 
static void Mod_GenerateLightmaps_CreateTriangleInformation(model_t *model)
{
    msurface_t *surface;
    int surfaceindex;
    int i;
    int axis;
    float normal[3];
    const int *e;
    lightmaptriangle_t *triangle;
    // generate lightmap triangle structs
    mod_generatelightmaps_lightmaptriangles = (lightmaptriangle_t *)Mem_Alloc(model->mempool, model->surfmesh.num_triangles * sizeof(lightmaptriangle_t));
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        e = model->surfmesh.data_element3i + surface->num_firsttriangle*3;
        for (i = 0;i < surface->num_triangles;i++)
        {
            triangle = &mod_generatelightmaps_lightmaptriangles[surface->num_firsttriangle+i];
            triangle->triangleindex = surface->num_firsttriangle+i;
            triangle->surfaceindex = surfaceindex;
            VectorCopy(model->surfmesh.data_vertex3f + 3*e[i*3+0], triangle->vertex[0]);
            VectorCopy(model->surfmesh.data_vertex3f + 3*e[i*3+1], triangle->vertex[1]);
            VectorCopy(model->surfmesh.data_vertex3f + 3*e[i*3+2], triangle->vertex[2]);
            // calculate bounds of triangle
            triangle->mins[0] = min(triangle->vertex[0][0], min(triangle->vertex[1][0], triangle->vertex[2][0]));
            triangle->mins[1] = min(triangle->vertex[0][1], min(triangle->vertex[1][1], triangle->vertex[2][1]));
            triangle->mins[2] = min(triangle->vertex[0][2], min(triangle->vertex[1][2], triangle->vertex[2][2]));
            triangle->maxs[0] = max(triangle->vertex[0][0], max(triangle->vertex[1][0], triangle->vertex[2][0]));
            triangle->maxs[1] = max(triangle->vertex[0][1], max(triangle->vertex[1][1], triangle->vertex[2][1]));
            triangle->maxs[2] = max(triangle->vertex[0][2], max(triangle->vertex[1][2], triangle->vertex[2][2]));
            // pick an axial projection based on the triangle normal
            TriangleNormal(triangle->vertex[0], triangle->vertex[1], triangle->vertex[2], normal);
            axis = 0;
            if (fabs(normal[1]) > fabs(normal[axis]))
                axis = 1;
            if (fabs(normal[2]) > fabs(normal[axis]))
                axis = 2;
            triangle->axis = axis;
        }
    }
}
 
static void Mod_GenerateLightmaps_DestroyTriangleInformation(model_t *model)
{
    if (mod_generatelightmaps_lightmaptriangles)
        Mem_Free(mod_generatelightmaps_lightmaptriangles);
    mod_generatelightmaps_lightmaptriangles = NULL;
}
 
float lmaxis[3][3] = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}};
 
static void Mod_GenerateLightmaps_CreateLightmaps(model_t *model)
{
    msurface_t *surface;
    int surfaceindex;
    int lightmapindex;
    int lightmapnumber;
    int i;
    int j;
    int k;
    int x;
    int y;
    int axis;
    int axis1;
    int axis2;
    int retry;
    int pixeloffset;
    float trianglenormal[3];
    float samplecenter[3];
    float samplenormal[3];
    float temp[3];
    float lmiscale[2];
    float slopex;
    float slopey;
    float slopebase;
    float lmscalepixels;
    float lmmins;
    float lmmaxs;
    float lm_basescalepixels;
    int lm_borderpixels;
    int lm_texturesize;
    //int lm_maxpixels;
    const int *e;
    lightmaptriangle_t *triangle;
    unsigned char *lightmappixels;
    unsigned char *deluxemappixels;
    mod_alloclightmap_state_t lmstate;
    char vabuf[1024];
 
    // generate lightmap projection information for all triangles
    if (model->texturepool == NULL)
        model->texturepool = R_AllocTexturePool();
    lm_basescalepixels = 1.0f / max(0.0001f, mod_generatelightmaps_unitspersample.value);
    lm_borderpixels = mod_generatelightmaps_borderpixels.integer;
    lm_texturesize = bound(lm_borderpixels*2+1, 64, (int)vid.maxtexturesize_2d);
    //lm_maxpixels = lm_texturesize-(lm_borderpixels*2+1);
    Mod_AllocLightmap_Init(&lmstate, loadmodel->mempool, lm_texturesize, lm_texturesize);
    lightmapnumber = 0;
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        e = model->surfmesh.data_element3i + surface->num_firsttriangle*3;
        lmscalepixels = lm_basescalepixels;
        for (retry = 0;retry < 30;retry++)
        {
            // after a couple failed attempts, degrade quality to make it fit
            if (retry > 1)
                lmscalepixels *= 0.5f;
            for (i = 0;i < surface->num_triangles;i++)
            {
                triangle = &mod_generatelightmaps_lightmaptriangles[surface->num_firsttriangle+i];
                triangle->lightmapindex = lightmapnumber;
                // calculate lightmap bounds in 3D pixel coordinates, limit size,
                // pick two planar axes for projection
                // lightmap coordinates here are in pixels
                // lightmap projections are snapped to pixel grid explicitly, such
                // that two neighboring triangles sharing an edge and projection
                // axis will have identical sample spacing along their shared edge
                k = 0;
                for (j = 0;j < 3;j++)
                {
                    if (j == triangle->axis)
                        continue;
                    lmmins = floor(triangle->mins[j]*lmscalepixels)-lm_borderpixels;
                    lmmaxs = floor(triangle->maxs[j]*lmscalepixels)+lm_borderpixels;
                    triangle->lmsize[k] = (int)(lmmaxs-lmmins);
                    triangle->lmbase[k] = lmmins/lmscalepixels;
                    triangle->lmscale[k] = lmscalepixels;
                    k++;
                }
                if (!Mod_AllocLightmap_Block(&lmstate, triangle->lmsize[0], triangle->lmsize[1], &triangle->lmoffset[0], &triangle->lmoffset[1]))
                    break;
            }
            // if all fit in this texture, we're done with this surface
            if (i == surface->num_triangles)
                break;
            // if we haven't maxed out the lightmap size yet, we retry the
            // entire surface batch...
            if (lm_texturesize * 2 <= min(mod_generatelightmaps_texturesize.integer, (int)vid.maxtexturesize_2d))
            {
                lm_texturesize *= 2;
                surfaceindex = -1;
                lightmapnumber = 0;
                Mod_AllocLightmap_Free(&lmstate);
                Mod_AllocLightmap_Init(&lmstate, loadmodel->mempool, lm_texturesize, lm_texturesize);
                break;
            }
            // if we have maxed out the lightmap size, and this triangle does
            // not fit in the same texture as the rest of the surface, we have
            // to retry the entire surface in a new texture (can only use one)
            // with multiple retries, the lightmap quality degrades until it
            // fits (or gives up)
            if (surfaceindex > 0)
                lightmapnumber++;
            Mod_AllocLightmap_Reset(&lmstate);
        }
    }
    lightmapnumber++;
    Mod_AllocLightmap_Free(&lmstate);
 
    // now put triangles together into lightmap textures, and do not allow
    // triangles of a surface to go into different textures (as that would
    // require rewriting the surface list)
    model->brushq3.deluxemapping_modelspace = true;
    model->brushq3.deluxemapping = true;
    model->brushq3.num_mergedlightmaps = lightmapnumber;
    model->brushq3.data_lightmaps = (rtexture_t **)Mem_Alloc(model->mempool, model->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
    model->brushq3.data_deluxemaps = (rtexture_t **)Mem_Alloc(model->mempool, model->brushq3.num_mergedlightmaps * sizeof(rtexture_t *));
    lightmappixels = (unsigned char *)Mem_Alloc(tempmempool, model->brushq3.num_mergedlightmaps * lm_texturesize * lm_texturesize * 4);
    deluxemappixels = (unsigned char *)Mem_Alloc(tempmempool, model->brushq3.num_mergedlightmaps * lm_texturesize * lm_texturesize * 4);
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        e = model->surfmesh.data_element3i + surface->num_firsttriangle*3;
        for (i = 0;i < surface->num_triangles;i++)
        {
            triangle = &mod_generatelightmaps_lightmaptriangles[surface->num_firsttriangle+i];
            TriangleNormal(triangle->vertex[0], triangle->vertex[1], triangle->vertex[2], trianglenormal);
            VectorNormalize(trianglenormal);
            VectorCopy(trianglenormal, samplenormal); // FIXME: this is supposed to be interpolated per pixel from vertices
            axis = triangle->axis;
            axis1 = axis == 0 ? 1 : 0;
            axis2 = axis == 2 ? 1 : 2;
            lmiscale[0] = 1.0f / triangle->lmscale[0];
            lmiscale[1] = 1.0f / triangle->lmscale[1];
            if (trianglenormal[axis] < 0)
                VectorNegate(trianglenormal, trianglenormal);
            CrossProduct(lmaxis[axis2], trianglenormal, temp);slopex = temp[axis] / temp[axis1];
            CrossProduct(lmaxis[axis1], trianglenormal, temp);slopey = temp[axis] / temp[axis2];
            slopebase = triangle->vertex[0][axis] - triangle->vertex[0][axis1]*slopex - triangle->vertex[0][axis2]*slopey;
            for (j = 0;j < 3;j++)
            {
                float *t2f = model->surfmesh.data_texcoordlightmap2f + e[i*3+j]*2;
                t2f[0] = ((triangle->vertex[j][axis1] - triangle->lmbase[0]) * triangle->lmscale[0] + triangle->lmoffset[0]) / lm_texturesize;
                t2f[1] = ((triangle->vertex[j][axis2] - triangle->lmbase[1]) * triangle->lmscale[1] + triangle->lmoffset[1]) / lm_texturesize;
#if 0
                samplecenter[axis1] = (t2f[0]*lm_texturesize-triangle->lmoffset[0])*lmiscale[0] + triangle->lmbase[0];
                samplecenter[axis2] = (t2f[1]*lm_texturesize-triangle->lmoffset[1])*lmiscale[1] + triangle->lmbase[1];
                samplecenter[axis] = samplecenter[axis1]*slopex + samplecenter[axis2]*slopey + slopebase;
                Con_Printf("%f:%f %f:%f %f:%f = %f %f\n", triangle->vertex[j][axis1], samplecenter[axis1], triangle->vertex[j][axis2], samplecenter[axis2], triangle->vertex[j][axis], samplecenter[axis], t2f[0], t2f[1]);
#endif
            }
 
#if 0
            switch (axis)
            {
            default:
            case 0:
                forward[0] = 0;
                forward[1] = 1.0f / triangle->lmscale[0];
                forward[2] = 0;
                left[0] = 0;
                left[1] = 0;
                left[2] = 1.0f / triangle->lmscale[1];
                up[0] = 1.0f;
                up[1] = 0;
                up[2] = 0;
                origin[0] = 0;
                origin[1] = triangle->lmbase[0];
                origin[2] = triangle->lmbase[1];
                break;
            case 1:
                forward[0] = 1.0f / triangle->lmscale[0];
                forward[1] = 0;
                forward[2] = 0;
                left[0] = 0;
                left[1] = 0;
                left[2] = 1.0f / triangle->lmscale[1];
                up[0] = 0;
                up[1] = 1.0f;
                up[2] = 0;
                origin[0] = triangle->lmbase[0];
                origin[1] = 0;
                origin[2] = triangle->lmbase[1];
                break;
            case 2:
                forward[0] = 1.0f / triangle->lmscale[0];
                forward[1] = 0;
                forward[2] = 0;
                left[0] = 0;
                left[1] = 1.0f / triangle->lmscale[1];
                left[2] = 0;
                up[0] = 0;
                up[1] = 0;
                up[2] = 1.0f;
                origin[0] = triangle->lmbase[0];
                origin[1] = triangle->lmbase[1];
                origin[2] = 0;
                break;
            }
            Matrix4x4_FromVectors(&backmatrix, forward, left, up, origin);
#endif
#define LM_DIST_EPSILON (1.0f / 32.0f)
            for (y = 0;y < triangle->lmsize[1];y++)
            {
                pixeloffset = ((triangle->lightmapindex * lm_texturesize + y + triangle->lmoffset[1]) * lm_texturesize + triangle->lmoffset[0]) * 4;
                for (x = 0;x < triangle->lmsize[0];x++, pixeloffset += 4)
                {
                    samplecenter[axis1] = (x+0.5f)*lmiscale[0] + triangle->lmbase[0];
                    samplecenter[axis2] = (y+0.5f)*lmiscale[1] + triangle->lmbase[1];
                    samplecenter[axis] = samplecenter[axis1]*slopex + samplecenter[axis2]*slopey + slopebase;
                    VectorMA(samplecenter, 0.125f, samplenormal, samplecenter);
                    Mod_GenerateLightmaps_LightmapSample(samplecenter, samplenormal, lightmappixels + pixeloffset, deluxemappixels + pixeloffset);
                }
            }
        }
    }
 
    for (lightmapindex = 0;lightmapindex < model->brushq3.num_mergedlightmaps;lightmapindex++)
    {
        model->brushq3.data_lightmaps[lightmapindex] = R_LoadTexture2D(model->texturepool, va(vabuf, sizeof(vabuf), "lightmap%i", lightmapindex), lm_texturesize, lm_texturesize, lightmappixels + lightmapindex * lm_texturesize * lm_texturesize * 4, TEXTYPE_BGRA, TEXF_FORCELINEAR, -1, NULL);
        model->brushq3.data_deluxemaps[lightmapindex] = R_LoadTexture2D(model->texturepool, va(vabuf, sizeof(vabuf), "deluxemap%i", lightmapindex), lm_texturesize, lm_texturesize, deluxemappixels + lightmapindex * lm_texturesize * lm_texturesize * 4, TEXTYPE_BGRA, TEXF_FORCELINEAR, -1, NULL);
    }
 
    if (lightmappixels)
        Mem_Free(lightmappixels);
    if (deluxemappixels)
        Mem_Free(deluxemappixels);
 
    for (surfaceindex = 0;surfaceindex < model->num_surfaces;surfaceindex++)
    {
        surface = model->data_surfaces + surfaceindex;
        if (!surface->num_triangles)
            continue;
        lightmapindex = mod_generatelightmaps_lightmaptriangles[surface->num_firsttriangle].lightmapindex;
        surface->lightmaptexture = model->brushq3.data_lightmaps[lightmapindex];
        surface->deluxemaptexture = model->brushq3.data_deluxemaps[lightmapindex];
        surface->lightmapinfo = NULL;
    }
 
    model->brush.LightPoint = Mod_GenerateLightmaps_LightPoint;
    model->brushq1.lightdata = NULL;
    model->brushq1.lightmapupdateflags = NULL;
    model->brushq1.firstrender = false;
    model->brushq1.num_lightstyles = 0;
    model->brushq1.data_lightstyleinfo = NULL;
    for (i = 0;i < model->brush.numsubmodels;i++)
    {
        model->brush.submodels[i]->brushq1.lightmapupdateflags = NULL;
        model->brush.submodels[i]->brushq1.firstrender = false;
        model->brush.submodels[i]->brushq1.num_lightstyles = 0;
        model->brush.submodels[i]->brushq1.data_lightstyleinfo = NULL;
    }
}
 
static void Mod_GenerateLightmaps_UpdateVertexColors(model_t *model)
{
    int i;
    for (i = 0;i < model->surfmesh.num_vertices;i++)
        Mod_GenerateLightmaps_VertexSample(model->surfmesh.data_vertex3f + 3*i, model->surfmesh.data_normal3f + 3*i, model->surfmesh.data_lightmapcolor4f + 4*i);
}
 
static void Mod_GenerateLightmaps_UpdateLightGrid(model_t *model)
{
    int x;
    int y;
    int z;
    int index = 0;
    float pos[3];
    for (z = 0;z < model->brushq3.num_lightgrid_isize[2];z++)
    {
        pos[2] = (model->brushq3.num_lightgrid_imins[2] + z + 0.5f) * model->brushq3.num_lightgrid_cellsize[2];
        for (y = 0;y < model->brushq3.num_lightgrid_isize[1];y++)
        {
            pos[1] = (model->brushq3.num_lightgrid_imins[1] + y + 0.5f) * model->brushq3.num_lightgrid_cellsize[1];
            for (x = 0;x < model->brushq3.num_lightgrid_isize[0];x++, index++)
            {
                pos[0] = (model->brushq3.num_lightgrid_imins[0] + x + 0.5f) * model->brushq3.num_lightgrid_cellsize[0];
                Mod_GenerateLightmaps_GridSample(pos, model->brushq3.data_lightgrid + index);
            }
        }
    }
}
 
extern cvar_t mod_q3bsp_nolightmaps;
static void Mod_GenerateLightmaps(model_t *model)
{
    //lightmaptriangle_t *lightmaptriangles = Mem_Alloc(model->mempool, model->surfmesh.num_triangles * sizeof(lightmaptriangle_t));
    model_t *oldloadmodel = loadmodel;
    loadmodel = model;
 
    Mod_GenerateLightmaps_InitSampleOffsets(model);
    Mod_GenerateLightmaps_DestroyLightmaps(model);
    Mod_GenerateLightmaps_UnweldTriangles(model);
    Mod_GenerateLightmaps_CreateTriangleInformation(model);
    Mod_GenerateLightmaps_CreateLights(model);
    if(!mod_q3bsp_nolightmaps.integer)
        Mod_GenerateLightmaps_CreateLightmaps(model);
    Mod_GenerateLightmaps_UpdateVertexColors(model);
    Mod_GenerateLightmaps_UpdateLightGrid(model);
    Mod_GenerateLightmaps_DestroyLights(model);
    Mod_GenerateLightmaps_DestroyTriangleInformation(model);
 
    loadmodel = oldloadmodel;
}
 
static void Mod_GenerateLightmaps_f(cmd_state_t *cmd)
{
    if (Cmd_Argc(cmd) != 1)
    {
        Con_Printf("usage: mod_generatelightmaps\n");
        return;
    }
    if (!cl.worldmodel)
    {
        Con_Printf("no worldmodel loaded\n");
        return;
    }
    Mod_GenerateLightmaps(cl.worldmodel);
}
 
void Mod_Mesh_Create(model_t *mod, const char *name)
{
    memset(mod, 0, sizeof(*mod));
    dp_strlcpy(mod->name, name, sizeof(mod->name));
    mod->mempool = Mem_AllocPool(name, 0, NULL);
    mod->texturepool = R_AllocTexturePool();
    mod->Draw = R_Mod_Draw;
    mod->DrawDepth = R_Mod_DrawDepth;
    mod->DrawDebug = R_Mod_DrawDebug;
    mod->DrawPrepass = R_Mod_DrawPrepass;
    mod->GetLightInfo = R_Mod_GetLightInfo;
    mod->DrawShadowMap = R_Mod_DrawShadowMap;
    mod->DrawLight = R_Mod_DrawLight;
}
 
void Mod_Mesh_Destroy(model_t *mod)
{
    Mod_UnloadModel(mod);
}
 
// resets the mesh model to have no geometry to render, ready for a new frame -
// the mesh will be prepared for rendering later using Mod_Mesh_Finalize
void Mod_Mesh_Reset(model_t *mod)
{
    mod->num_surfaces = 0;
    mod->surfmesh.num_vertices = 0;
    mod->surfmesh.num_triangles = 0;
    if (mod->surfmesh.data_vertexhash) // UBSan: memset arg 1 isn't allowed to be null, but sometimes this is NULL.
        memset(mod->surfmesh.data_vertexhash, -1, mod->surfmesh.num_vertexhashsize * sizeof(*mod->surfmesh.data_vertexhash));
    mod->DrawSky = NULL; // will be set if a texture needs it
    mod->DrawAddWaterPlanes = NULL; // will be set if a texture needs it
}
 
texture_t *Mod_Mesh_GetTexture(model_t *mod, const char *name, int defaultdrawflags, int defaulttexflags, int defaultmaterialflags)
{
    int i;
    texture_t *t;
    int drawflag = defaultdrawflags & DRAWFLAG_MASK;
    for (i = 0, t = mod->data_textures; i < mod->num_textures; i++, t++)
        if (!strcmp(t->name, name) && t->mesh_drawflag == drawflag && t->mesh_defaulttexflags == defaulttexflags && t->mesh_defaultmaterialflags == defaultmaterialflags)
            return t;
    if (mod->max_textures <= mod->num_textures)
    {
        texture_t *oldtextures = mod->data_textures;
        mod->max_textures = max(mod->max_textures * 2, 1024);
        mod->data_textures = (texture_t *)Mem_Realloc(mod->mempool, mod->data_textures, mod->max_textures * sizeof(*mod->data_textures));
        // update the pointers
        for (i = 0; i < mod->num_surfaces; i++)
            mod->data_surfaces[i].texture = mod->data_textures + (mod->data_surfaces[i].texture - oldtextures);
    }
    t = &mod->data_textures[mod->num_textures++];
    Mod_LoadTextureFromQ3Shader(mod->mempool, mod->name, t, name, true, true, defaulttexflags, defaultmaterialflags);
    t->mesh_drawflag = drawflag;
    t->mesh_defaulttexflags = defaulttexflags;
    t->mesh_defaultmaterialflags = defaultmaterialflags;
    switch (defaultdrawflags & DRAWFLAG_MASK)
    {
    case DRAWFLAG_ADDITIVE:
        t->basematerialflags |= MATERIALFLAG_ADD | MATERIALFLAG_BLENDED;
        t->currentmaterialflags = t->basematerialflags;
        break;
    case DRAWFLAG_MODULATE:
        t->basematerialflags |= MATERIALFLAG_CUSTOMBLEND | MATERIALFLAG_BLENDED;
        t->currentmaterialflags = t->basematerialflags;
        t->customblendfunc[0] = GL_DST_COLOR;
        t->customblendfunc[1] = GL_ZERO;
        break;
    case DRAWFLAG_2XMODULATE:
        t->basematerialflags |= MATERIALFLAG_CUSTOMBLEND | MATERIALFLAG_BLENDED;
        t->currentmaterialflags = t->basematerialflags;
        t->customblendfunc[0] = GL_DST_COLOR;
        t->customblendfunc[1] = GL_SRC_COLOR;
        break;
    case DRAWFLAG_SCREEN:
        t->basematerialflags |= MATERIALFLAG_CUSTOMBLEND | MATERIALFLAG_BLENDED;
        t->currentmaterialflags = t->basematerialflags;
        t->customblendfunc[0] = GL_ONE_MINUS_DST_COLOR;
        t->customblendfunc[1] = GL_ONE;
        break;
    default:
        break;
    }
    return t;
}
 
msurface_t *Mod_Mesh_AddSurface(model_t *mod, texture_t *tex, qbool batchwithprevioussurface)
{
    msurface_t *surf;
    // batch if possible; primarily useful for UI rendering where bounding boxes don't matter
    if (batchwithprevioussurface && mod->num_surfaces > 0 && mod->data_surfaces[mod->num_surfaces - 1].texture == tex)
        return mod->data_surfaces + mod->num_surfaces - 1;
    // create new surface
    if (mod->max_surfaces == mod->num_surfaces)
    {
        mod->max_surfaces = 2 * max(mod->num_surfaces, 64);
        mod->data_surfaces = (msurface_t *)Mem_Realloc(mod->mempool, mod->data_surfaces, mod->max_surfaces * sizeof(*mod->data_surfaces));
        mod->modelsurfaces_sorted = (int *)Mem_Realloc(mod->mempool, mod->modelsurfaces_sorted, mod->max_surfaces * sizeof(*mod->modelsurfaces_sorted));
    }
    surf = mod->data_surfaces + mod->num_surfaces;
    mod->num_surfaces++;
    memset(surf, 0, sizeof(*surf));
    surf->texture = tex;
    surf->num_firsttriangle = mod->surfmesh.num_triangles;
    surf->num_firstvertex = mod->surfmesh.num_vertices;
    if (tex->basematerialflags & (MATERIALFLAG_SKY))
        mod->DrawSky = R_Mod_DrawSky;
    if (tex->basematerialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION | MATERIALFLAG_CAMERA))
        mod->DrawAddWaterPlanes = R_Mod_DrawAddWaterPlanes;
    return surf;
}
 
int Mod_Mesh_IndexForVertex(model_t *mod, msurface_t *surf, float x, float y, float z, float nx, float ny, float nz, float s, float t, float u, float v, float r, float g, float b, float a)
{
    int hashindex, h, vnum, mask;
    surfmesh_t *mesh = &mod->surfmesh;
    if (mesh->max_vertices == mesh->num_vertices)
    {
        mesh->max_vertices = max(mesh->num_vertices * 2, 256);
        mesh->data_vertex3f = (float *)Mem_Realloc(mod->mempool, mesh->data_vertex3f, mesh->max_vertices * sizeof(float[3]));
        mesh->data_svector3f = (float *)Mem_Realloc(mod->mempool, mesh->data_svector3f, mesh->max_vertices * sizeof(float[3]));
        mesh->data_tvector3f = (float *)Mem_Realloc(mod->mempool, mesh->data_tvector3f, mesh->max_vertices * sizeof(float[3]));
        mesh->data_normal3f = (float *)Mem_Realloc(mod->mempool, mesh->data_normal3f, mesh->max_vertices * sizeof(float[3]));
        mesh->data_texcoordtexture2f = (float *)Mem_Realloc(mod->mempool, mesh->data_texcoordtexture2f, mesh->max_vertices * sizeof(float[2]));
        mesh->data_texcoordlightmap2f = (float *)Mem_Realloc(mod->mempool, mesh->data_texcoordlightmap2f, mesh->max_vertices * sizeof(float[2]));
        mesh->data_lightmapcolor4f = (float *)Mem_Realloc(mod->mempool, mesh->data_lightmapcolor4f, mesh->max_vertices * sizeof(float[4]));
        // rebuild the hash table
        mesh->num_vertexhashsize = 4 * mesh->max_vertices;
        mesh->num_vertexhashsize &= ~(mesh->num_vertexhashsize - 1); // round down to pow2
        mesh->data_vertexhash = (int *)Mem_Realloc(mod->mempool, mesh->data_vertexhash, mesh->num_vertexhashsize * sizeof(*mesh->data_vertexhash));
        memset(mesh->data_vertexhash, -1, mesh->num_vertexhashsize * sizeof(*mesh->data_vertexhash));
        mask = mod->surfmesh.num_vertexhashsize - 1;
        // no need to hash the vertices for the entire model, the latest surface will suffice.
        for (vnum = surf ? surf->num_firstvertex : 0; vnum < mesh->num_vertices; vnum++)
        {
            // this uses prime numbers intentionally for computing the hash
            hashindex = (unsigned int)(mesh->data_vertex3f[vnum * 3 + 0] * 2003 + mesh->data_vertex3f[vnum * 3 + 1] * 4001 + mesh->data_vertex3f[vnum * 3 + 2] * 7919 + mesh->data_normal3f[vnum * 3 + 0] * 4097 + mesh->data_normal3f[vnum * 3 + 1] * 257 + mesh->data_normal3f[vnum * 3 + 2] * 17) & mask;
            for (h = hashindex; mesh->data_vertexhash[h] >= 0; h = (h + 1) & mask)
                ; // just iterate until we find the terminator
            mesh->data_vertexhash[h] = vnum;
        }
    }
    mask = mod->surfmesh.num_vertexhashsize - 1;
    // this uses prime numbers intentionally for computing the hash
    hashindex = (unsigned int)(x * 2003 + y * 4001 + z * 7919 + nx * 4097 + ny * 257 + nz * 17) & mask;
    // when possible find an identical vertex within the same surface and return it
    for(h = hashindex;(vnum = mesh->data_vertexhash[h]) >= 0;h = (h + 1) & mask)
    {
        if (vnum >= surf->num_firstvertex
         && mesh->data_vertex3f[vnum * 3 + 0] == x && mesh->data_vertex3f[vnum * 3 + 1] == y && mesh->data_vertex3f[vnum * 3 + 2] == z
         && mesh->data_normal3f[vnum * 3 + 0] == nx && mesh->data_normal3f[vnum * 3 + 1] == ny && mesh->data_normal3f[vnum * 3 + 2] == nz
         && mesh->data_texcoordtexture2f[vnum * 2 + 0] == s && mesh->data_texcoordtexture2f[vnum * 2 + 1] == t
         && mesh->data_texcoordlightmap2f[vnum * 2 + 0] == u && mesh->data_texcoordlightmap2f[vnum * 2 + 1] == v
         && mesh->data_lightmapcolor4f[vnum * 4 + 0] == r && mesh->data_lightmapcolor4f[vnum * 4 + 1] == g && mesh->data_lightmapcolor4f[vnum * 4 + 2] == b && mesh->data_lightmapcolor4f[vnum * 4 + 3] == a)
            return vnum;
    }
    // add the new vertex
    vnum = mesh->num_vertices++;
    if (surf->num_vertices > 0)
    {
        if (surf->mins[0] > x) surf->mins[0] = x;
        if (surf->mins[1] > y) surf->mins[1] = y;
        if (surf->mins[2] > z) surf->mins[2] = z;
        if (surf->maxs[0] < x) surf->maxs[0] = x;
        if (surf->maxs[1] < y) surf->maxs[1] = y;
        if (surf->maxs[2] < z) surf->maxs[2] = z;
    }
    else
    {
        VectorSet(surf->mins, x, y, z);
        VectorSet(surf->maxs, x, y, z);
    }
    surf->num_vertices = mesh->num_vertices - surf->num_firstvertex;
    mesh->data_vertexhash[h] = vnum;
    mesh->data_vertex3f[vnum * 3 + 0] = x;
    mesh->data_vertex3f[vnum * 3 + 1] = y;
    mesh->data_vertex3f[vnum * 3 + 2] = z;
    mesh->data_normal3f[vnum * 3 + 0] = nx;
    mesh->data_normal3f[vnum * 3 + 1] = ny;
    mesh->data_normal3f[vnum * 3 + 2] = nz;
    mesh->data_texcoordtexture2f[vnum * 2 + 0] = s;
    mesh->data_texcoordtexture2f[vnum * 2 + 1] = t;
    mesh->data_texcoordlightmap2f[vnum * 2 + 0] = u;
    mesh->data_texcoordlightmap2f[vnum * 2 + 1] = v;
    mesh->data_lightmapcolor4f[vnum * 4 + 0] = r;
    mesh->data_lightmapcolor4f[vnum * 4 + 1] = g;
    mesh->data_lightmapcolor4f[vnum * 4 + 2] = b;
    mesh->data_lightmapcolor4f[vnum * 4 + 3] = a;
    return vnum;
}
 
void Mod_Mesh_AddTriangle(model_t *mod, msurface_t *surf, int e0, int e1, int e2)
{
    surfmesh_t *mesh = &mod->surfmesh;
    if (mesh->max_triangles == mesh->num_triangles)
    {
        mesh->max_triangles = 2 * max(mesh->num_triangles, 128);
        mesh->data_element3s = (unsigned short *)Mem_Realloc(mod->mempool, mesh->data_element3s, mesh->max_triangles * sizeof(unsigned short[3]));
        mesh->data_element3i = (int *)Mem_Realloc(mod->mempool, mesh->data_element3i, mesh->max_triangles * sizeof(int[3]));
    }
    mesh->data_element3s[mesh->num_triangles * 3 + 0] = e0;
    mesh->data_element3s[mesh->num_triangles * 3 + 1] = e1;
    mesh->data_element3s[mesh->num_triangles * 3 + 2] = e2;
    mesh->data_element3i[mesh->num_triangles * 3 + 0] = e0;
    mesh->data_element3i[mesh->num_triangles * 3 + 1] = e1;
    mesh->data_element3i[mesh->num_triangles * 3 + 2] = e2;
    mesh->num_triangles++;
    surf->num_triangles++;
}
 
static void Mod_Mesh_MakeSortedSurfaces(model_t *mod)
{
    int i, j;
    texture_t *tex;
 
    // build the sorted surfaces list properly to reduce material setup
    // this is easy because we're just sorting on texture and don't care about the order of textures
    mod->submodelsurfaces_start = 0;
    mod->submodelsurfaces_end = 0;
    for (i = 0; i < mod->num_surfaces; i++)
        mod->data_surfaces[i].included = false;
    for (i = 0; i < mod->num_surfaces; i++)
    {
        if (mod->data_surfaces[i].included)
            continue;
        tex = mod->data_surfaces[i].texture;
        // j = i is intentional
        for (j = i; j < mod->num_surfaces; j++)
        {
            if (!mod->data_surfaces[j].included && mod->data_surfaces[j].texture == tex)
            {
                mod->data_surfaces[j].included = 1;
                mod->modelsurfaces_sorted[mod->submodelsurfaces_end++] = j;
            }
        }
    }
}
 
static void Mod_Mesh_ComputeBounds(model_t *mod)
{
    int i;
    vec_t x2a, x2b, y2a, y2b, z2a, z2b, x2, y2, z2, yawradius, rotatedradius;
 
    if (mod->surfmesh.num_vertices > 0)
    {
        // calculate normalmins/normalmaxs
        VectorCopy(mod->surfmesh.data_vertex3f, mod->normalmins);
        VectorCopy(mod->surfmesh.data_vertex3f, mod->normalmaxs);
        for (i = 1; i < mod->surfmesh.num_vertices; i++)
        {
            float x = mod->surfmesh.data_vertex3f[i * 3 + 0];
            float y = mod->surfmesh.data_vertex3f[i * 3 + 1];
            float z = mod->surfmesh.data_vertex3f[i * 3 + 2];
            // expand bounds to include this vertex
            if (mod->normalmins[0] > x) mod->normalmins[0] = x;
            if (mod->normalmins[1] > y) mod->normalmins[1] = y;
            if (mod->normalmins[2] > z) mod->normalmins[2] = z;
            if (mod->normalmaxs[0] < x) mod->normalmaxs[0] = x;
            if (mod->normalmaxs[1] < y) mod->normalmaxs[1] = y;
            if (mod->normalmaxs[2] < z) mod->normalmaxs[2] = z;
        }
        // calculate yawmins/yawmaxs, rotatedmins/maxs from normalmins/maxs
        // (fast but less accurate than doing it per vertex)
        x2a = mod->normalmins[0] * mod->normalmins[0];
        x2b = mod->normalmaxs[0] * mod->normalmaxs[0];
        y2a = mod->normalmins[1] * mod->normalmins[1];
        y2b = mod->normalmaxs[1] * mod->normalmaxs[1];
        z2a = mod->normalmins[2] * mod->normalmins[2];
        z2b = mod->normalmaxs[2] * mod->normalmaxs[2];
        x2 = max(x2a, x2b);
        y2 = max(y2a, y2b);
        z2 = max(z2a, z2b);
        yawradius = sqrt(x2 + y2);
        rotatedradius = sqrt(x2 + y2 + z2);
        VectorSet(mod->yawmins, -yawradius, -yawradius, mod->normalmins[2]);
        VectorSet(mod->yawmaxs, yawradius, yawradius, mod->normalmaxs[2]);
        VectorSet(mod->rotatedmins, -rotatedradius, -rotatedradius, -rotatedradius);
        VectorSet(mod->rotatedmaxs, rotatedradius, rotatedradius, rotatedradius);
        mod->radius = rotatedradius;
        mod->radius2 = x2 + y2 + z2;
    }
    else
    {
        VectorClear(mod->normalmins);
        VectorClear(mod->normalmaxs);
        VectorClear(mod->yawmins);
        VectorClear(mod->yawmaxs);
        VectorClear(mod->rotatedmins);
        VectorClear(mod->rotatedmaxs);
        mod->radius = 0;
        mod->radius2 = 0;
    }
}
 
void Mod_Mesh_Validate(model_t *mod)
{
    int i;
    qbool warned = false;
    for (i = 0; i < mod->num_surfaces; i++)
    {
        msurface_t *surf = mod->data_surfaces + i;
        int *e = mod->surfmesh.data_element3i + surf->num_firsttriangle * 3;
        int first = surf->num_firstvertex;
        int end = surf->num_firstvertex + surf->num_vertices;
        int j;
        for (j = 0;j < surf->num_triangles * 3;j++)
        {
            if (e[j] < first || e[j] >= end)
            {
                if (!warned)
                    Con_DPrintf(CON_WARN "Mod_Mesh_Validate: detected corrupt surface - debug me!\n");
                warned = true;
                e[j] = first;
            }
        }
    }
}
 
static void Mod_Mesh_UploadDynamicBuffers(model_t *mod)
{
    mod->surfmesh.data_element3s_indexbuffer = mod->surfmesh.data_element3s ? R_BufferData_Store(mod->surfmesh.num_triangles * sizeof(short[3]), mod->surfmesh.data_element3s, R_BUFFERDATA_INDEX16, &mod->surfmesh.data_element3s_bufferoffset) : NULL;
    mod->surfmesh.data_element3i_indexbuffer = mod->surfmesh.data_element3i ? R_BufferData_Store(mod->surfmesh.num_triangles * sizeof(int[3]), mod->surfmesh.data_element3i, R_BUFFERDATA_INDEX32, &mod->surfmesh.data_element3i_bufferoffset) : NULL;
    mod->surfmesh.data_vertex3f_vertexbuffer = mod->surfmesh.data_vertex3f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[3]), mod->surfmesh.data_vertex3f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_vertex3f_bufferoffset) : NULL;
    mod->surfmesh.data_svector3f_vertexbuffer = mod->surfmesh.data_svector3f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[3]), mod->surfmesh.data_svector3f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_svector3f_bufferoffset) : NULL;
    mod->surfmesh.data_tvector3f_vertexbuffer = mod->surfmesh.data_tvector3f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[3]), mod->surfmesh.data_tvector3f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_tvector3f_bufferoffset) : NULL;
    mod->surfmesh.data_normal3f_vertexbuffer = mod->surfmesh.data_normal3f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[3]), mod->surfmesh.data_normal3f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_normal3f_bufferoffset) : NULL;
    mod->surfmesh.data_texcoordtexture2f_vertexbuffer = mod->surfmesh.data_texcoordtexture2f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[2]), mod->surfmesh.data_texcoordtexture2f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_texcoordtexture2f_bufferoffset) : NULL;
    mod->surfmesh.data_texcoordlightmap2f_vertexbuffer = mod->surfmesh.data_texcoordlightmap2f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[2]), mod->surfmesh.data_texcoordlightmap2f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_texcoordlightmap2f_bufferoffset) : NULL;
    mod->surfmesh.data_lightmapcolor4f_vertexbuffer = mod->surfmesh.data_lightmapcolor4f ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(float[4]), mod->surfmesh.data_lightmapcolor4f, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_lightmapcolor4f_bufferoffset) : NULL;
    mod->surfmesh.data_skeletalindex4ub_vertexbuffer = mod->surfmesh.data_skeletalindex4ub ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(unsigned char[4]), mod->surfmesh.data_skeletalindex4ub, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_skeletalindex4ub_bufferoffset) : NULL;
    mod->surfmesh.data_skeletalweight4ub_vertexbuffer = mod->surfmesh.data_skeletalweight4ub ? R_BufferData_Store(mod->surfmesh.num_vertices * sizeof(unsigned char[4]), mod->surfmesh.data_skeletalweight4ub, R_BUFFERDATA_VERTEX, &mod->surfmesh.data_skeletalweight4ub_bufferoffset) : NULL;
}
 
void Mod_Mesh_Finalize(model_t *mod)
{
    if (gl_paranoid.integer)
        Mod_Mesh_Validate(mod);
    Mod_Mesh_ComputeBounds(mod);
    Mod_Mesh_MakeSortedSurfaces(mod);
    if(!r_refdef.draw2dstage)
        Mod_BuildTextureVectorsFromNormals(0, mod->surfmesh.num_vertices, mod->surfmesh.num_triangles, mod->surfmesh.data_vertex3f, mod->surfmesh.data_texcoordtexture2f, mod->surfmesh.data_normal3f, mod->surfmesh.data_element3i, mod->surfmesh.data_svector3f, mod->surfmesh.data_tvector3f, true);
    Mod_Mesh_UploadDynamicBuffers(mod);
}