model_alias.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.
 
*/
 
#include "quakedef.h"
#include "image.h"
#include "r_shadow.h"
#include "mod_skeletal_animatevertices_generic.h"
#ifdef SSE_POSSIBLE
#include "mod_skeletal_animatevertices_sse.h"
#endif
 
#ifdef SSE_POSSIBLE
static qbool r_skeletal_use_sse_defined = false;
cvar_t r_skeletal_use_sse = {CF_CLIENT, "r_skeletal_use_sse", "1", "use SSE for skeletal model animation"};
#endif
cvar_t r_skeletal_debugbone = {CF_CLIENT, "r_skeletal_debugbone", "-1", "development cvar for testing skeletal model code"};
cvar_t r_skeletal_debugbonecomponent = {CF_CLIENT, "r_skeletal_debugbonecomponent", "3", "development cvar for testing skeletal model code"};
cvar_t r_skeletal_debugbonevalue = {CF_CLIENT, "r_skeletal_debugbonevalue", "100", "development cvar for testing skeletal model code"};
cvar_t r_skeletal_debugtranslatex = {CF_CLIENT, "r_skeletal_debugtranslatex", "1", "development cvar for testing skeletal model code"};
cvar_t r_skeletal_debugtranslatey = {CF_CLIENT, "r_skeletal_debugtranslatey", "1", "development cvar for testing skeletal model code"};
cvar_t r_skeletal_debugtranslatez = {CF_CLIENT, "r_skeletal_debugtranslatez", "1", "development cvar for testing skeletal model code"};
cvar_t mod_alias_supporttagscale = {CF_CLIENT | CF_SERVER, "mod_alias_supporttagscale", "1", "support scaling factors in bone/tag attachment matrices as supported by MD3"};
cvar_t mod_alias_force_animated = {CF_CLIENT | CF_SERVER, "mod_alias_force_animated", "", "if set to an non-empty string, overrides the is-animated flag of any alias models (for benchmarking)"};
 
float mod_md3_sin[320];
 
static size_t Mod_Skeletal_AnimateVertices_maxbonepose = 0;
static void *Mod_Skeletal_AnimateVertices_bonepose = NULL;
void Mod_Skeletal_FreeBuffers(void)
{
    if(Mod_Skeletal_AnimateVertices_bonepose)
        Mem_Free(Mod_Skeletal_AnimateVertices_bonepose);
    Mod_Skeletal_AnimateVertices_maxbonepose = 0;
    Mod_Skeletal_AnimateVertices_bonepose = NULL;
}
void *Mod_Skeletal_AnimateVertices_AllocBuffers(size_t nbytes)
{
    if(Mod_Skeletal_AnimateVertices_maxbonepose < nbytes)
    {
        if(Mod_Skeletal_AnimateVertices_bonepose)
            Mem_Free(Mod_Skeletal_AnimateVertices_bonepose);
        Mod_Skeletal_AnimateVertices_bonepose = Z_Malloc(nbytes);
        Mod_Skeletal_AnimateVertices_maxbonepose = nbytes;
    }
    return Mod_Skeletal_AnimateVertices_bonepose;
}
 
void Mod_Skeletal_BuildTransforms(const model_t * RESTRICT model, const frameblend_t * RESTRICT frameblend, const skeleton_t *skeleton, float * RESTRICT bonepose, float * RESTRICT boneposerelative)
{
    int i, blends;
    float m[12];
 
    if (!bonepose)
        bonepose = (float * RESTRICT) Mod_Skeletal_AnimateVertices_AllocBuffers(sizeof(float[12]) * model->num_bones);
        
    if (skeleton && !skeleton->relativetransforms)
        skeleton = NULL;
 
    // interpolate matrices
    if (skeleton)
    {
        for (i = 0;i < model->num_bones;i++)
        {
            Matrix4x4_ToArray12FloatD3D(&skeleton->relativetransforms[i], m);
            if (model->data_bones[i].parent >= 0)
                R_ConcatTransforms(bonepose + model->data_bones[i].parent * 12, m, bonepose + i * 12);
            else
                memcpy(bonepose + i * 12, m, sizeof(m));
 
            // create a relative deformation matrix to describe displacement
            // from the base mesh, which is used by the actual weighting
            R_ConcatTransforms(bonepose + i * 12, model->data_baseboneposeinverse + i * 12, boneposerelative + i * 12);
        }
    }
    else
    {
        for (i = 0;i < model->num_bones;i++)
        {
            // blend by transform each quaternion/translation into a dual-quaternion first, then blending
            const short * RESTRICT firstpose7s = model->data_poses7s + 7 * (frameblend[0].subframe * model->num_bones + i);
            float firstlerp = frameblend[0].lerp,
                firsttx = firstpose7s[0], firstty = firstpose7s[1], firsttz = firstpose7s[2],
                rx = firstpose7s[3] * firstlerp,
                ry = firstpose7s[4] * firstlerp,
                rz = firstpose7s[5] * firstlerp,
                rw = firstpose7s[6] * firstlerp,
                dx = firsttx*rw + firstty*rz - firsttz*ry,
                dy = -firsttx*rz + firstty*rw + firsttz*rx,
                dz = firsttx*ry - firstty*rx + firsttz*rw,
                dw = -firsttx*rx - firstty*ry - firsttz*rz,
                scale, sx, sy, sz, sw;
            for (blends = 1;blends < MAX_FRAMEBLENDS && frameblend[blends].lerp > 0;blends++)
            {
                const short * RESTRICT blendpose7s = model->data_poses7s + 7 * (frameblend[blends].subframe * model->num_bones + i);
                float blendlerp = frameblend[blends].lerp,
                    blendtx = blendpose7s[0], blendty = blendpose7s[1], blendtz = blendpose7s[2],
                    qx = blendpose7s[3], qy = blendpose7s[4], qz = blendpose7s[5], qw = blendpose7s[6];
                if(rx*qx + ry*qy + rz*qz + rw*qw < 0) blendlerp = -blendlerp;
                qx *= blendlerp;
                qy *= blendlerp;
                qz *= blendlerp;
                qw *= blendlerp;
                rx += qx;
                ry += qy;
                rz += qz;
                rw += qw;
                dx += blendtx*qw + blendty*qz - blendtz*qy;
                dy += -blendtx*qz + blendty*qw + blendtz*qx;
                dz += blendtx*qy - blendty*qx + blendtz*qw;
                dw += -blendtx*qx - blendty*qy - blendtz*qz;
            }
            // generate a matrix from the dual-quaternion, implicitly normalizing it in the process
            scale = 1.0f / (rx*rx + ry*ry + rz*rz + rw*rw);
            sx = rx * scale;
            sy = ry * scale;
            sz = rz * scale;
            sw = rw * scale;
            m[0] = sw*rw + sx*rx - sy*ry - sz*rz;
            m[1] = 2*(sx*ry - sw*rz);
            m[2] = 2*(sx*rz + sw*ry);
            m[3] = model->num_posescale*(dx*sw - dy*sz + dz*sy - dw*sx);
            m[4] = 2*(sx*ry + sw*rz);
            m[5] = sw*rw + sy*ry - sx*rx - sz*rz;
            m[6] = 2*(sy*rz - sw*rx);
            m[7] = model->num_posescale*(dx*sz + dy*sw - dz*sx - dw*sy);
            m[8] = 2*(sx*rz - sw*ry);
            m[9] = 2*(sy*rz + sw*rx);
            m[10] = sw*rw + sz*rz - sx*rx - sy*ry;
            m[11] = model->num_posescale*(dy*sx + dz*sw - dx*sy - dw*sz);
            if (i == r_skeletal_debugbone.integer)
                m[r_skeletal_debugbonecomponent.integer % 12] += r_skeletal_debugbonevalue.value;
            m[3] *= r_skeletal_debugtranslatex.value;
            m[7] *= r_skeletal_debugtranslatey.value;
            m[11] *= r_skeletal_debugtranslatez.value;
            if (model->data_bones[i].parent >= 0)
                R_ConcatTransforms(bonepose + model->data_bones[i].parent * 12, m, bonepose + i * 12);
            else
                memcpy(bonepose + i * 12, m, sizeof(m));
            // create a relative deformation matrix to describe displacement
            // from the base mesh, which is used by the actual weighting
            R_ConcatTransforms(bonepose + i * 12, model->data_baseboneposeinverse + i * 12, boneposerelative + i * 12);
        }
    }
}
 
static void Mod_Skeletal_AnimateVertices(const model_t * RESTRICT model, const frameblend_t * RESTRICT frameblend, const skeleton_t *skeleton, float * RESTRICT vertex3f, float * RESTRICT normal3f, float * RESTRICT svector3f, float * RESTRICT tvector3f)
{
 
    if (!model->surfmesh.num_vertices)
        return;
 
    if (!model->num_bones)
    {
        if (vertex3f) memcpy(vertex3f, model->surfmesh.data_vertex3f, model->surfmesh.num_vertices*sizeof(float[3]));
        if (normal3f) memcpy(normal3f, model->surfmesh.data_normal3f, model->surfmesh.num_vertices*sizeof(float[3]));
        if (svector3f) memcpy(svector3f, model->surfmesh.data_svector3f, model->surfmesh.num_vertices*sizeof(float[3]));
        if (tvector3f) memcpy(tvector3f, model->surfmesh.data_tvector3f, model->surfmesh.num_vertices*sizeof(float[3]));
        return;
    }
 
#ifdef SSE_POSSIBLE
    if(r_skeletal_use_sse_defined)
        if(r_skeletal_use_sse.integer)
        {
            Mod_Skeletal_AnimateVertices_SSE(model, frameblend, skeleton, vertex3f, normal3f, svector3f, tvector3f);
            return;
        }
#endif
    Mod_Skeletal_AnimateVertices_Generic(model, frameblend, skeleton, vertex3f, normal3f, svector3f, tvector3f);
}
 
void Mod_AliasInit (void)
{
    int i;
    Cvar_RegisterVariable(&r_skeletal_debugbone);
    Cvar_RegisterVariable(&r_skeletal_debugbonecomponent);
    Cvar_RegisterVariable(&r_skeletal_debugbonevalue);
    Cvar_RegisterVariable(&r_skeletal_debugtranslatex);
    Cvar_RegisterVariable(&r_skeletal_debugtranslatey);
    Cvar_RegisterVariable(&r_skeletal_debugtranslatez);
    Cvar_RegisterVariable(&mod_alias_supporttagscale);
    Cvar_RegisterVariable(&mod_alias_force_animated);
    for (i = 0;i < 320;i++)
        mod_md3_sin[i] = sin(i * M_PI * 2.0f / 256.0);
#ifdef SSE_POSSIBLE
    if(Sys_HaveSSE())
    {
        Con_Printf("Skeletal animation uses SSE code path\n");
        r_skeletal_use_sse_defined = true;
        Cvar_RegisterVariable(&r_skeletal_use_sse);
    }
    else
        Con_Printf("Skeletal animation uses generic code path (SSE disabled or not detected)\n");
#else
    Con_Printf("Skeletal animation uses generic code path (SSE not compiled in)\n");
#endif
}
 
static int Mod_Skeletal_AddBlend(model_t *model, const blendweights_t *newweights)
{
    int i;
    blendweights_t *weights;
    if(!newweights->influence[1])
        return newweights->index[0];
    weights = model->surfmesh.data_blendweights;
    for (i = 0;i < model->surfmesh.num_blends;i++, weights++)
    {
        if (!memcmp(weights, newweights, sizeof(blendweights_t)))
            return model->num_bones + i;
    }
    model->surfmesh.num_blends++;
    memcpy(weights, newweights, sizeof(blendweights_t));
    return model->num_bones + i;
}
 
static int Mod_Skeletal_CompressBlend(model_t *model, const int *newindex, const float *newinfluence)
{
    int i, total;
    float scale;
    blendweights_t newweights;
    if(!newinfluence[1])
        return newindex[0];
    scale = 0;
    for (i = 0;i < 4;i++)
        scale += newinfluence[i];
    scale = 255.0f / scale;
    total = 0;
    for (i = 0;i < 4;i++)
    {
        newweights.index[i] = newindex[i];
        newweights.influence[i] = (unsigned char)(newinfluence[i] * scale);
        total += newweights.influence[i];
    }   
    while (total > 255)
    {
        for (i = 0;i < 4;i++)
        {
            if(newweights.influence[i] > 0 && total > 255) 
            { 
                newweights.influence[i]--;
                total--; 
            }
        }
    }
    while (total < 255)
    {
        for (i = 0; i < 4;i++)
        {
            if(newweights.influence[i] < 255 && total < 255) 
            { 
                newweights.influence[i]++; 
                total++; 
            }
        }
    }
    return Mod_Skeletal_AddBlend(model, &newweights);
}
 
static void Mod_MD3_AnimateVertices(const model_t * RESTRICT model, const frameblend_t * RESTRICT frameblend, const skeleton_t *skeleton, float * RESTRICT vertex3f, float * RESTRICT normal3f, float * RESTRICT svector3f, float * RESTRICT tvector3f)
{
    // vertex morph
    int i, numblends, blendnum;
    int numverts = model->surfmesh.num_vertices;
    numblends = 0;
    for (blendnum = 0;blendnum < MAX_FRAMEBLENDS;blendnum++)
    {
        //VectorMA(translate, model->surfmesh.num_morphmdlframetranslate, frameblend[blendnum].lerp, translate);
        if (frameblend[blendnum].lerp > 0)
            numblends = blendnum + 1;
    }
    // special case for the first blend because it avoids some adds and the need to memset the arrays first
    for (blendnum = 0;blendnum < numblends;blendnum++)
    {
        const md3vertex_t *verts = model->surfmesh.data_morphmd3vertex + numverts * frameblend[blendnum].subframe;
        if (vertex3f)
        {
            float scale = frameblend[blendnum].lerp * (1.0f / 64.0f);
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++)
                {
                    vertex3f[i * 3 + 0] = verts[i].origin[0] * scale;
                    vertex3f[i * 3 + 1] = verts[i].origin[1] * scale;
                    vertex3f[i * 3 + 2] = verts[i].origin[2] * scale;
                }
            }
            else
            {
                for (i = 0;i < numverts;i++)
                {
                    vertex3f[i * 3 + 0] += verts[i].origin[0] * scale;
                    vertex3f[i * 3 + 1] += verts[i].origin[1] * scale;
                    vertex3f[i * 3 + 2] += verts[i].origin[2] * scale;
                }
            }
        }
        // the yaw and pitch stored in md3 models are 8bit quantized angles
        // (0-255), and as such a lookup table is very well suited to
        // decoding them, and since cosine is equivalent to sine with an
        // extra 45 degree rotation, this uses one lookup table for both
        // sine and cosine with a +64 bias to get cosine.
        if (normal3f)
        {
            float lerp = frameblend[blendnum].lerp;
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++)
                {
                    normal3f[i * 3 + 0] = mod_md3_sin[verts[i].yaw + 64] * mod_md3_sin[verts[i].pitch     ] * lerp;
                    normal3f[i * 3 + 1] = mod_md3_sin[verts[i].yaw     ] * mod_md3_sin[verts[i].pitch     ] * lerp;
                    normal3f[i * 3 + 2] =                                  mod_md3_sin[verts[i].pitch + 64] * lerp;
                }
            }
            else
            {
                for (i = 0;i < numverts;i++)
                {
                    normal3f[i * 3 + 0] += mod_md3_sin[verts[i].yaw + 64] * mod_md3_sin[verts[i].pitch     ] * lerp;
                    normal3f[i * 3 + 1] += mod_md3_sin[verts[i].yaw     ] * mod_md3_sin[verts[i].pitch     ] * lerp;
                    normal3f[i * 3 + 2] +=                                  mod_md3_sin[verts[i].pitch + 64] * lerp;
                }
            }
        }
        if (svector3f)
        {
            const texvecvertex_t *texvecvert = model->surfmesh.data_morphtexvecvertex + numverts * frameblend[blendnum].subframe;
            float f = frameblend[blendnum].lerp * (1.0f / 127.0f);
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++, texvecvert++)
                {
                    VectorScale(texvecvert->svec, f, svector3f + i*3);
                    VectorScale(texvecvert->tvec, f, tvector3f + i*3);
                }
            }
            else
            {
                for (i = 0;i < numverts;i++, texvecvert++)
                {
                    VectorMA(svector3f + i*3, f, texvecvert->svec, svector3f + i*3);
                    VectorMA(tvector3f + i*3, f, texvecvert->tvec, tvector3f + i*3);
                }
            }
        }
    }
}
static void Mod_MDL_AnimateVertices(const model_t * RESTRICT model, const frameblend_t * RESTRICT frameblend, const skeleton_t *skeleton, float * RESTRICT vertex3f, float * RESTRICT normal3f, float * RESTRICT svector3f, float * RESTRICT tvector3f)
{
    // vertex morph
    int i, numblends, blendnum;
    int numverts = model->surfmesh.num_vertices;
    float translate[3];
    VectorClear(translate);
    numblends = 0;
    // blend the frame translates to avoid redundantly doing so on each vertex
    // (a bit of a brain twister but it works)
    for (blendnum = 0;blendnum < MAX_FRAMEBLENDS;blendnum++)
    {
        if (model->surfmesh.data_morphmd2framesize6f)
            VectorMA(translate, frameblend[blendnum].lerp, model->surfmesh.data_morphmd2framesize6f + frameblend[blendnum].subframe * 6 + 3, translate);
        else
            VectorMA(translate, frameblend[blendnum].lerp, model->surfmesh.num_morphmdlframetranslate, translate);
        if (frameblend[blendnum].lerp > 0)
            numblends = blendnum + 1;
    }
    // special case for the first blend because it avoids some adds and the need to memset the arrays first
    for (blendnum = 0;blendnum < numblends;blendnum++)
    {
        const trivertx_t *verts = model->surfmesh.data_morphmdlvertex + numverts * frameblend[blendnum].subframe;
        if (vertex3f)
        {
            float scale[3];
            if (model->surfmesh.data_morphmd2framesize6f)
                VectorScale(model->surfmesh.data_morphmd2framesize6f + frameblend[blendnum].subframe * 6, frameblend[blendnum].lerp, scale);
            else
                VectorScale(model->surfmesh.num_morphmdlframescale, frameblend[blendnum].lerp, scale);
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++)
                {
                    vertex3f[i * 3 + 0] = translate[0] + verts[i].v[0] * scale[0];
                    vertex3f[i * 3 + 1] = translate[1] + verts[i].v[1] * scale[1];
                    vertex3f[i * 3 + 2] = translate[2] + verts[i].v[2] * scale[2];
                }
            }
            else
            {
                for (i = 0;i < numverts;i++)
                {
                    vertex3f[i * 3 + 0] += verts[i].v[0] * scale[0];
                    vertex3f[i * 3 + 1] += verts[i].v[1] * scale[1];
                    vertex3f[i * 3 + 2] += verts[i].v[2] * scale[2];
                }
            }
        }
        // the vertex normals in mdl models are an index into a table of
        // 162 unique values, this very crude quantization reduces the
        // vertex normal to only one byte, which saves a lot of space but
        // also makes lighting pretty coarse
        if (normal3f)
        {
            float lerp = frameblend[blendnum].lerp;
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++)
                {
                    const float *vn = m_bytenormals[verts[i].lightnormalindex];
                    VectorScale(vn, lerp, normal3f + i*3);
                }
            }
            else
            {
                for (i = 0;i < numverts;i++)
                {
                    const float *vn = m_bytenormals[verts[i].lightnormalindex];
                    VectorMA(normal3f + i*3, lerp, vn, normal3f + i*3);
                }
            }
        }
        if (svector3f)
        {
            const texvecvertex_t *texvecvert = model->surfmesh.data_morphtexvecvertex + numverts * frameblend[blendnum].subframe;
            float f = frameblend[blendnum].lerp * (1.0f / 127.0f);
            if (blendnum == 0)
            {
                for (i = 0;i < numverts;i++, texvecvert++)
                {
                    VectorScale(texvecvert->svec, f, svector3f + i*3);
                    VectorScale(texvecvert->tvec, f, tvector3f + i*3);
                }
            }
            else
            {
                for (i = 0;i < numverts;i++, texvecvert++)
                {
                    VectorMA(svector3f + i*3, f, texvecvert->svec, svector3f + i*3);
                    VectorMA(tvector3f + i*3, f, texvecvert->tvec, tvector3f + i*3);
                }
            }
        }
    }
}
 
int Mod_Alias_GetTagMatrix(const model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, int tagindex, matrix4x4_t *outmatrix)
{
    matrix4x4_t temp;
    matrix4x4_t parentbonematrix;
    matrix4x4_t tempbonematrix;
    matrix4x4_t bonematrix;
    matrix4x4_t blendmatrix;
    int blendindex;
    int parenttagindex;
    int k;
    float lerp;
    const float *input;
    float blendtag[12];
    *outmatrix = identitymatrix;
    if (skeleton && skeleton->relativetransforms)
    {
        if (tagindex < 0 || tagindex >= skeleton->model->num_bones)
            return 4;
        *outmatrix = skeleton->relativetransforms[tagindex];
        while ((tagindex = model->data_bones[tagindex].parent) >= 0)
        {
            temp = *outmatrix;
            Matrix4x4_Concat(outmatrix, &skeleton->relativetransforms[tagindex], &temp);
        }
    }
    else if (model->num_bones)
    {
        if (tagindex < 0 || tagindex >= model->num_bones)
            return 4;
        Matrix4x4_Clear(&blendmatrix);
        for (blendindex = 0;blendindex < MAX_FRAMEBLENDS && frameblend[blendindex].lerp > 0;blendindex++)
        {
            lerp = frameblend[blendindex].lerp;
            Matrix4x4_FromBonePose7s(&bonematrix, model->num_posescale, model->data_poses7s + 7 * (frameblend[blendindex].subframe * model->num_bones + tagindex));
            parenttagindex = tagindex;
            while ((parenttagindex = model->data_bones[parenttagindex].parent) >= 0)
            {
                Matrix4x4_FromBonePose7s(&parentbonematrix, model->num_posescale, model->data_poses7s + 7 * (frameblend[blendindex].subframe * model->num_bones + parenttagindex));
                tempbonematrix = bonematrix;
                Matrix4x4_Concat(&bonematrix, &parentbonematrix, &tempbonematrix);
            }
            Matrix4x4_Accumulate(&blendmatrix, &bonematrix, lerp);
        }
        *outmatrix = blendmatrix;
    }
    else if (model->num_tags)
    {
        if (tagindex < 0 || tagindex >= model->num_tags)
            return 4;
        for (k = 0;k < 12;k++)
            blendtag[k] = 0;
        for (blendindex = 0;blendindex < MAX_FRAMEBLENDS && frameblend[blendindex].lerp > 0;blendindex++)
        {
            lerp = frameblend[blendindex].lerp;
            input = model->data_tags[frameblend[blendindex].subframe * model->num_tags + tagindex].matrixgl;
            for (k = 0;k < 12;k++)
                blendtag[k] += input[k] * lerp;
        }
        Matrix4x4_FromArray12FloatGL(outmatrix, blendtag);
    }
 
    if(!mod_alias_supporttagscale.integer)
        Matrix4x4_Normalize3(outmatrix, outmatrix);
 
    return 0;
}
 
int Mod_Alias_GetExtendedTagInfoForIndex(const model_t *model, unsigned int skin, const frameblend_t *frameblend, const skeleton_t *skeleton, int tagindex, int *parentindex, const char **tagname, matrix4x4_t *tag_localmatrix)
{
    int blendindex;
    int k;
    float lerp;
    matrix4x4_t bonematrix;
    matrix4x4_t blendmatrix;
    const float *input;
    float blendtag[12];
 
    if (skeleton && skeleton->relativetransforms)
    {
        if (tagindex < 0 || tagindex >= skeleton->model->num_bones)
            return 1;
        *parentindex = skeleton->model->data_bones[tagindex].parent;
        *tagname = skeleton->model->data_bones[tagindex].name;
        *tag_localmatrix = skeleton->relativetransforms[tagindex];
        return 0;
    }
    else if (model->num_bones)
    {
        if (tagindex < 0 || tagindex >= model->num_bones)
            return 1;
        *parentindex = model->data_bones[tagindex].parent;
        *tagname = model->data_bones[tagindex].name;
        Matrix4x4_Clear(&blendmatrix);
        for (blendindex = 0;blendindex < MAX_FRAMEBLENDS && frameblend[blendindex].lerp > 0;blendindex++)
        {
            lerp = frameblend[blendindex].lerp;
            Matrix4x4_FromBonePose7s(&bonematrix, model->num_posescale, model->data_poses7s + 7 * (frameblend[blendindex].subframe * model->num_bones + tagindex));
            Matrix4x4_Accumulate(&blendmatrix, &bonematrix, lerp);
        }
        *tag_localmatrix = blendmatrix;
        return 0;
    }
    else if (model->num_tags)
    {
        if (tagindex < 0 || tagindex >= model->num_tags)
            return 1;
        *parentindex = -1;
        *tagname = model->data_tags[tagindex].name;
        for (k = 0;k < 12;k++)
            blendtag[k] = 0;
        for (blendindex = 0;blendindex < MAX_FRAMEBLENDS && frameblend[blendindex].lerp > 0;blendindex++)
        {
            lerp = frameblend[blendindex].lerp;
            input = model->data_tags[frameblend[blendindex].subframe * model->num_tags + tagindex].matrixgl;
            for (k = 0;k < 12;k++)
                blendtag[k] += input[k] * lerp;
        }
        Matrix4x4_FromArray12FloatGL(tag_localmatrix, blendtag);
        return 0;
    }
 
    return 2;
}
 
int Mod_Alias_GetTagIndexForName(const model_t *model, unsigned int skin, const char *tagname)
{
    int i;
    if(skin >= (unsigned int)model->numskins)
        skin = 0;
    if (model->num_bones)
        for (i = 0;i < model->num_bones;i++)
            if (!strcasecmp(tagname, model->data_bones[i].name))
                return i + 1;
    if (model->num_tags)
        for (i = 0;i < model->num_tags;i++)
            if (!strcasecmp(tagname, model->data_tags[i].name))
                return i + 1;
    return 0;
}
 
static void Mod_BuildBaseBonePoses(void)
{
    int boneindex;
    matrix4x4_t *basebonepose;
    float *outinvmatrix = loadmodel->data_baseboneposeinverse;
    matrix4x4_t bonematrix;
    matrix4x4_t tempbonematrix;
    if (!loadmodel->num_bones)
        return;
    basebonepose = (matrix4x4_t *)Mem_Alloc(tempmempool, loadmodel->num_bones * sizeof(matrix4x4_t));
    for (boneindex = 0;boneindex < loadmodel->num_bones;boneindex++)
    {
        Matrix4x4_FromBonePose7s(&bonematrix, loadmodel->num_posescale, loadmodel->data_poses7s + 7 * boneindex);
        if (loadmodel->data_bones[boneindex].parent >= 0)
        {
            tempbonematrix = bonematrix;
            Matrix4x4_Concat(&bonematrix, basebonepose + loadmodel->data_bones[boneindex].parent, &tempbonematrix);
        }
        basebonepose[boneindex] = bonematrix;
        Matrix4x4_Invert_Simple(&tempbonematrix, basebonepose + boneindex);
        Matrix4x4_ToArray12FloatD3D(&tempbonematrix, outinvmatrix + 12*boneindex);
    }
    Mem_Free(basebonepose);
}
 
static qbool Mod_Alias_CalculateBoundingBox(void)
{
    int vnum;
    qbool firstvertex = true;
    float dist, yawradius, radius;
    float *v;
    qbool isanimated = false;
    VectorClear(loadmodel->normalmins);
    VectorClear(loadmodel->normalmaxs);
    yawradius = 0;
    radius = 0;
    if (loadmodel->AnimateVertices)
    {
        float *vertex3f, *refvertex3f;
        frameblend_t frameblend[MAX_FRAMEBLENDS];
        memset(frameblend, 0, sizeof(frameblend));
        frameblend[0].lerp = 1;
        vertex3f = (float *) Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(float[3]) * 2);
        refvertex3f = NULL;
        for (frameblend[0].subframe = 0;frameblend[0].subframe < loadmodel->num_poses;frameblend[0].subframe++)
        {
            loadmodel->AnimateVertices(loadmodel, frameblend, NULL, vertex3f, NULL, NULL, NULL);
            if (!refvertex3f)
            {
                // make a copy of the first frame for comparing all others
                refvertex3f = vertex3f + loadmodel->surfmesh.num_vertices * 3;
                memcpy(refvertex3f, vertex3f, loadmodel->surfmesh.num_vertices * sizeof(float[3]));
            }
            else
            {
                if (!isanimated && memcmp(refvertex3f, vertex3f, loadmodel->surfmesh.num_vertices * sizeof(float[3])))
                    isanimated = true;
            }
            for (vnum = 0, v = vertex3f;vnum < loadmodel->surfmesh.num_vertices;vnum++, v += 3)
            {
                if (firstvertex)
                {
                    firstvertex = false;
                    VectorCopy(v, loadmodel->normalmins);
                    VectorCopy(v, loadmodel->normalmaxs);
                }
                else
                {
                    if (loadmodel->normalmins[0] > v[0]) loadmodel->normalmins[0] = v[0];
                    if (loadmodel->normalmins[1] > v[1]) loadmodel->normalmins[1] = v[1];
                    if (loadmodel->normalmins[2] > v[2]) loadmodel->normalmins[2] = v[2];
                    if (loadmodel->normalmaxs[0] < v[0]) loadmodel->normalmaxs[0] = v[0];
                    if (loadmodel->normalmaxs[1] < v[1]) loadmodel->normalmaxs[1] = v[1];
                    if (loadmodel->normalmaxs[2] < v[2]) loadmodel->normalmaxs[2] = v[2];
                }
                dist = v[0] * v[0] + v[1] * v[1];
                if (yawradius < dist)
                    yawradius = dist;
                dist += v[2] * v[2];
                if (radius < dist)
                    radius = dist;
            }
        }
        if (vertex3f)
            Mem_Free(vertex3f);
    }
    else
    {
        for (vnum = 0, v = loadmodel->surfmesh.data_vertex3f;vnum < loadmodel->surfmesh.num_vertices;vnum++, v += 3)
        {
            if (firstvertex)
            {
                firstvertex = false;
                VectorCopy(v, loadmodel->normalmins);
                VectorCopy(v, loadmodel->normalmaxs);
            }
            else
            {
                if (loadmodel->normalmins[0] > v[0]) loadmodel->normalmins[0] = v[0];
                if (loadmodel->normalmins[1] > v[1]) loadmodel->normalmins[1] = v[1];
                if (loadmodel->normalmins[2] > v[2]) loadmodel->normalmins[2] = v[2];
                if (loadmodel->normalmaxs[0] < v[0]) loadmodel->normalmaxs[0] = v[0];
                if (loadmodel->normalmaxs[1] < v[1]) loadmodel->normalmaxs[1] = v[1];
                if (loadmodel->normalmaxs[2] < v[2]) loadmodel->normalmaxs[2] = v[2];
            }
            dist = v[0] * v[0] + v[1] * v[1];
            if (yawradius < dist)
                yawradius = dist;
            dist += v[2] * v[2];
            if (radius < dist)
                radius = dist;
        }
    }
    radius = sqrt(radius);
    yawradius = sqrt(yawradius);
    loadmodel->yawmins[0] = loadmodel->yawmins[1] = -yawradius;
    loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] = yawradius;
    loadmodel->yawmins[2] = loadmodel->normalmins[2];
    loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
    loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -radius;
    loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] = radius;
    loadmodel->radius = radius;
    loadmodel->radius2 = radius * radius;
    return isanimated;
}
 
static void Mod_Alias_MorphMesh_CompileFrames(void)
{
    int i, j;
    frameblend_t frameblend[MAX_FRAMEBLENDS];
    unsigned char *datapointer;
    memset(frameblend, 0, sizeof(frameblend));
    frameblend[0].lerp = 1;
    datapointer = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * (sizeof(float[3]) * 4 + loadmodel->surfmesh.num_morphframes * sizeof(texvecvertex_t)));
    loadmodel->surfmesh.data_vertex3f = (float *)datapointer;datapointer += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_svector3f = (float *)datapointer;datapointer += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_tvector3f = (float *)datapointer;datapointer += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_normal3f = (float *)datapointer;datapointer += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_morphtexvecvertex = (texvecvertex_t *)datapointer;datapointer += loadmodel->surfmesh.num_morphframes * loadmodel->surfmesh.num_vertices * sizeof(texvecvertex_t);
    // this counts down from the last frame to the first so that the final data in surfmesh is for frame zero (which is what the renderer expects to be there)
    for (i = loadmodel->surfmesh.num_morphframes-1;i >= 0;i--)
    {
        frameblend[0].subframe = i;
        loadmodel->AnimateVertices(loadmodel, frameblend, NULL, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_normal3f, NULL, NULL);
        Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
        // encode the svector and tvector in 3 byte format for permanent storage
        for (j = 0;j < loadmodel->surfmesh.num_vertices;j++)
        {
            VectorScaleCast(loadmodel->surfmesh.data_svector3f + j * 3, 127.0f, signed char, loadmodel->surfmesh.data_morphtexvecvertex[i*loadmodel->surfmesh.num_vertices+j].svec);
            VectorScaleCast(loadmodel->surfmesh.data_tvector3f + j * 3, 127.0f, signed char, loadmodel->surfmesh.data_morphtexvecvertex[i*loadmodel->surfmesh.num_vertices+j].tvec);
        }
    }
}
 
static void Mod_MDLMD2MD3_TraceLine(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
{
    int i;
    float segmentmins[3], segmentmaxs[3];
    msurface_t *surface;
    float vertex3fbuf[1024 * 3];
    float *vertex3f = vertex3fbuf;
    float *freevertex3f = NULL;
    // for static cases we can just call CollisionBIH which is much faster
    if ((frameblend == NULL || (frameblend[0].subframe == 0 && frameblend[1].lerp == 0)) && (skeleton == NULL || skeleton->relativetransforms == NULL))
    {
        Mod_CollisionBIH_TraceLine(model, frameblend, skeleton, trace, start, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        return;
    }
    memset(trace, 0, sizeof(*trace));
    trace->fraction = 1;
    trace->hitsupercontentsmask = hitsupercontentsmask;
    trace->skipsupercontentsmask = skipsupercontentsmask;
    trace->skipmaterialflagsmask = skipmaterialflagsmask;
    segmentmins[0] = min(start[0], end[0]) - 1;
    segmentmins[1] = min(start[1], end[1]) - 1;
    segmentmins[2] = min(start[2], end[2]) - 1;
    segmentmaxs[0] = max(start[0], end[0]) + 1;
    segmentmaxs[1] = max(start[1], end[1]) + 1;
    segmentmaxs[2] = max(start[2], end[2]) + 1;
    if (frameblend == NULL || frameblend[0].subframe != 0 || frameblend[0].lerp != 0 || skeleton != NULL)
    {
        if (model->surfmesh.num_vertices > 1024)
            vertex3f = freevertex3f = (float *)Mem_Alloc(tempmempool, model->surfmesh.num_vertices * sizeof(float[3]));
        model->AnimateVertices(model, frameblend, skeleton, vertex3f, NULL, NULL, NULL);
    }
    else
        vertex3f = model->surfmesh.data_vertex3f;
    for (i = 0, surface = model->data_surfaces;i < model->num_surfaces;i++, surface++)
        Collision_TraceLineTriangleMeshFloat(trace, start, end, surface->num_triangles, model->surfmesh.data_element3i + 3 * surface->num_firsttriangle, vertex3f, 0, NULL, SUPERCONTENTS_SOLID | (surface->texture->basematerialflags & MATERIALFLAGMASK_TRANSLUCENT ? 0 : SUPERCONTENTS_OPAQUE), 0, surface->texture, segmentmins, segmentmaxs);
    if (freevertex3f)
        Mem_Free(freevertex3f);
}
 
static void Mod_MDLMD2MD3_TraceBox(model_t *model, const frameblend_t *frameblend, const skeleton_t *skeleton, trace_t *trace, const vec3_t start, const vec3_t boxmins, const vec3_t boxmaxs, const vec3_t end, int hitsupercontentsmask, int skipsupercontentsmask, int skipmaterialflagsmask)
{
    int i;
    vec3_t shiftstart, shiftend;
    float segmentmins[3], segmentmaxs[3];
    msurface_t *surface;
    float vertex3fbuf[1024*3];
    float *vertex3f = vertex3fbuf;
    colboxbrushf_t thisbrush_start, thisbrush_end;
    vec3_t boxstartmins, boxstartmaxs, boxendmins, boxendmaxs;
 
    if (VectorCompare(boxmins, boxmaxs))
    {
        VectorAdd(start, boxmins, shiftstart);
        VectorAdd(end, boxmins, shiftend);
        Mod_MDLMD2MD3_TraceLine(model, frameblend, skeleton, trace, shiftstart, shiftend, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        VectorSubtract(trace->endpos, boxmins, trace->endpos);
        return;
    }
 
    // for static cases we can just call CollisionBIH which is much faster
    if ((frameblend == NULL || (frameblend[0].subframe == 0 && frameblend[1].lerp == 0)) && (skeleton == NULL || skeleton->relativetransforms == NULL))
    {
        Mod_CollisionBIH_TraceBox(model, frameblend, skeleton, trace, start, boxmins, boxmaxs, end, hitsupercontentsmask, skipsupercontentsmask, skipmaterialflagsmask);
        return;
    }
 
    // box trace, performed as brush trace
    memset(trace, 0, sizeof(*trace));
    trace->fraction = 1;
    trace->hitsupercontentsmask = hitsupercontentsmask;
    trace->skipsupercontentsmask = skipsupercontentsmask;
    trace->skipmaterialflagsmask = skipmaterialflagsmask;
    if (model->surfmesh.num_vertices > 1024)
        vertex3f = (float *)Mem_Alloc(tempmempool, model->surfmesh.num_vertices * sizeof(float[3]));
    segmentmins[0] = min(start[0], end[0]) + boxmins[0] - 1;
    segmentmins[1] = min(start[1], end[1]) + boxmins[1] - 1;
    segmentmins[2] = min(start[2], end[2]) + boxmins[2] - 1;
    segmentmaxs[0] = max(start[0], end[0]) + boxmaxs[0] + 1;
    segmentmaxs[1] = max(start[1], end[1]) + boxmaxs[1] + 1;
    segmentmaxs[2] = max(start[2], end[2]) + boxmaxs[2] + 1;
    VectorAdd(start, boxmins, boxstartmins);
    VectorAdd(start, boxmaxs, boxstartmaxs);
    VectorAdd(end, boxmins, boxendmins);
    VectorAdd(end, boxmaxs, boxendmaxs);
    Collision_BrushForBox(&thisbrush_start, boxstartmins, boxstartmaxs, 0, 0, NULL);
    Collision_BrushForBox(&thisbrush_end, boxendmins, boxendmaxs, 0, 0, NULL);
    model->AnimateVertices(model, frameblend, skeleton, vertex3f, NULL, NULL, NULL);
    for (i = 0, surface = model->data_surfaces;i < model->num_surfaces;i++, surface++)
        Collision_TraceBrushTriangleMeshFloat(trace, &thisbrush_start.brush, &thisbrush_end.brush, surface->num_triangles, model->surfmesh.data_element3i + 3 * surface->num_firsttriangle, vertex3f, 0, NULL, SUPERCONTENTS_SOLID | (surface->texture->basematerialflags & MATERIALFLAGMASK_TRANSLUCENT ? 0 : SUPERCONTENTS_OPAQUE), 0, surface->texture, segmentmins, segmentmaxs);
    if (vertex3f != vertex3fbuf)
        Mem_Free(vertex3f);
}
 
static void Mod_ConvertAliasVerts (int inverts, trivertx_t *v, trivertx_t *out, int *vertremap)
{
    int i, j;
    for (i = 0;i < inverts;i++)
    {
        if (vertremap[i] < 0 && vertremap[i+inverts] < 0) // only used vertices need apply...
            continue;
        j = vertremap[i]; // not onseam
        if (j >= 0)
            out[j] = v[i];
        j = vertremap[i+inverts]; // onseam
        if (j >= 0)
            out[j] = v[i];
    }
}
 
static void Mod_MDL_LoadFrames (unsigned char* datapointer, int inverts, int *vertremap)
{
    int i, f, pose, groupframes;
    float interval;
    daliasframetype_t *pframetype;
    daliasframe_t *pinframe;
    daliasgroup_t *group;
    daliasinterval_t *intervals;
    animscene_t *scene;
    pose = 0;
    scene = loadmodel->animscenes;
    for (f = 0;f < loadmodel->numframes;f++)
    {
        pframetype = (daliasframetype_t *)datapointer;
        datapointer += sizeof(daliasframetype_t);
        if (LittleLong (pframetype->type) == ALIAS_SINGLE)
        {
            // a single frame is still treated as a group
            interval = 0.1f;
            groupframes = 1;
        }
        else
        {
            // read group header
            group = (daliasgroup_t *)datapointer;
            datapointer += sizeof(daliasgroup_t);
            groupframes = LittleLong (group->numframes);
 
            // intervals (time per frame)
            intervals = (daliasinterval_t *)datapointer;
            datapointer += sizeof(daliasinterval_t) * groupframes;
 
            interval = LittleFloat (intervals->interval); // FIXME: support variable framerate groups
            if (interval < 0.01f)
            {
                Con_Printf("%s has an invalid interval %f, changing to 0.1\n", loadmodel->name, interval);
                interval = 0.1f;
            }
        }
 
        // get scene name from first frame
        pinframe = (daliasframe_t *)datapointer;
 
        dp_strlcpy(scene->name, pinframe->name, sizeof(scene->name));
        scene->firstframe = pose;
        scene->framecount = groupframes;
        scene->framerate = 1.0f / interval;
        scene->loop = true;
        scene++;
 
        // read frames
        for (i = 0;i < groupframes;i++)
        {
            datapointer += sizeof(daliasframe_t);
            Mod_ConvertAliasVerts(inverts, (trivertx_t *)datapointer, loadmodel->surfmesh.data_morphmdlvertex + pose * loadmodel->surfmesh.num_vertices, vertremap);
            datapointer += sizeof(trivertx_t) * inverts;
            pose++;
        }
    }
}
 
void Mod_BuildAliasSkinsFromSkinFiles(texture_t *skin, skinfile_t *skinfile, const char *meshname, const char *shadername)
{
    int i;
    char stripbuf[MAX_QPATH];
    skinfileitem_t *skinfileitem;
    if(developer_extra.integer)
        Con_DPrintf("Looking up texture for %s (default: %s)\n", meshname, shadername);
    if (skinfile)
    {
        // the skin += loadmodel->num_surfaces part of this is because data_textures on alias models is arranged as [numskins][numsurfaces]
        for (i = 0;skinfile;skinfile = skinfile->next, i++, skin += loadmodel->num_surfaces)
        {
            memset(skin, 0, sizeof(*skin));
            // see if a mesh
            for (skinfileitem = skinfile->items;skinfileitem;skinfileitem = skinfileitem->next)
            {
                // leave the skin unitialized (nodraw) if the replacement is "common/nodraw" or "textures/common/nodraw"
                if (!strcmp(skinfileitem->name, meshname))
                {
                    Image_StripImageExtension(skinfileitem->replacement, stripbuf, sizeof(stripbuf));
                    if(developer_extra.integer)
                        Con_DPrintf("--> got %s from skin file\n", stripbuf);
                    Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, skin, stripbuf, true, true, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
                    break;
                }
            }
            if (!skinfileitem)
            {
                // don't render unmentioned meshes
                Mod_LoadCustomMaterial(loadmodel->mempool, skin, meshname, SUPERCONTENTS_SOLID, MATERIALFLAG_WALL, R_SkinFrame_LoadMissing());
                if(developer_extra.integer)
                    Con_DPrintf("--> skipping\n");
                skin->basematerialflags = skin->currentmaterialflags = MATERIALFLAG_NOSHADOW | MATERIALFLAG_NODRAW;
            }
        }
    }
    else
    {
        if(developer_extra.integer)
            Con_DPrintf("--> using default\n");
        Image_StripImageExtension(shadername, stripbuf, sizeof(stripbuf));
        Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, skin, stripbuf, true, true, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
    }
}
extern cvar_t r_nolerp_list;
#define BOUNDI(VALUE,MIN,MAX) if (VALUE < MIN || VALUE >= MAX) Host_Error("model %s has an invalid ##VALUE (%d exceeds %d - %d)", loadmodel->name, VALUE, MIN, MAX);
#define BOUNDF(VALUE,MIN,MAX) if (VALUE < MIN || VALUE >= MAX) Host_Error("model %s has an invalid ##VALUE (%f exceeds %f - %f)", loadmodel->name, VALUE, MIN, MAX);
void Mod_IDP0_Load(model_t *mod, void *buffer, void *bufferend)
{
    int i, j, version, totalskins, skinwidth, skinheight, groupframes, groupskins, numverts;
    float scales, scalet, interval;
    msurface_t *surface;
    unsigned char *data;
    mdl_t *pinmodel;
    stvert_t *pinstverts;
    dtriangle_t *pintriangles;
    daliasskintype_t *pinskintype;
    daliasskingroup_t *pinskingroup;
    daliasskininterval_t *pinskinintervals;
    daliasframetype_t *pinframetype;
    daliasgroup_t *pinframegroup;
    unsigned char *datapointer, *startframes, *startskins;
    char name[MAX_QPATH];
    skinframe_t *tempskinframe;
    animscene_t *tempskinscenes;
    texture_t *tempaliasskins;
    float *vertst;
    int *vertonseam, *vertremap;
    skinfile_t *skinfiles;
 
    datapointer = (unsigned char *)buffer;
    pinmodel = (mdl_t *)datapointer;
    datapointer += sizeof(mdl_t);
 
    version = LittleLong (pinmodel->version);
    if (version != ALIAS_VERSION)
        Host_Error ("%s has wrong version number (%i should be %i)",
                 loadmodel->name, version, ALIAS_VERSION);
 
    loadmodel->modeldatatypestring = "MDL";
 
    loadmodel->type = mod_alias;
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    // FIXME add TraceBrush!
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_MDL_AnimateVertices;
 
    loadmodel->num_surfaces = 1;
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces;
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int));
    loadmodel->data_surfaces = (msurface_t *)data;data += loadmodel->num_surfaces * sizeof(msurface_t);
    loadmodel->modelsurfaces_sorted = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->modelsurfaces_sorted[0] = 0;
 
    loadmodel->numskins = LittleLong(pinmodel->numskins);
    BOUNDI(loadmodel->numskins,0,65536);
    skinwidth = LittleLong (pinmodel->skinwidth);
    BOUNDI(skinwidth,0,65536);
    skinheight = LittleLong (pinmodel->skinheight);
    BOUNDI(skinheight,0,65536);
    numverts = LittleLong(pinmodel->numverts);
    BOUNDI(numverts,0,65536);
    loadmodel->surfmesh.num_triangles = LittleLong(pinmodel->numtris);
    BOUNDI(loadmodel->surfmesh.num_triangles,0,65536);
    loadmodel->numframes = LittleLong(pinmodel->numframes);
    BOUNDI(loadmodel->numframes,0,65536);
    loadmodel->synctype = (synctype_t)LittleLong (pinmodel->synctype);
    BOUNDI((int)loadmodel->synctype,0,2);
    // convert model flags to EF flags (MF_ROCKET becomes EF_ROCKET, etc)
    i = LittleLong (pinmodel->flags);
    loadmodel->effects = (((unsigned)i & 255) << 24) | (i & 0x00FFFF00);
 
    if (strstr(r_nolerp_list.string, loadmodel->name))
        loadmodel->nolerp = true;
 
    for (i = 0;i < 3;i++)
    {
        loadmodel->surfmesh.num_morphmdlframescale[i] = LittleFloat (pinmodel->scale[i]);
        loadmodel->surfmesh.num_morphmdlframetranslate[i] = LittleFloat (pinmodel->scale_origin[i]);
    }
 
    startskins = datapointer;
    totalskins = 0;
    for (i = 0;i < loadmodel->numskins;i++)
    {
        pinskintype = (daliasskintype_t *)datapointer;
        datapointer += sizeof(daliasskintype_t);
        if (LittleLong(pinskintype->type) == ALIAS_SKIN_SINGLE)
            groupskins = 1;
        else
        {
            pinskingroup = (daliasskingroup_t *)datapointer;
            datapointer += sizeof(daliasskingroup_t);
            groupskins = LittleLong(pinskingroup->numskins);
            datapointer += sizeof(daliasskininterval_t) * groupskins;
        }
 
        for (j = 0;j < groupskins;j++)
        {
            datapointer += skinwidth * skinheight;
            totalskins++;
        }
    }
 
    pinstverts = (stvert_t *)datapointer;
    datapointer += sizeof(stvert_t) * numverts;
 
    pintriangles = (dtriangle_t *)datapointer;
    datapointer += sizeof(dtriangle_t) * loadmodel->surfmesh.num_triangles;
 
    startframes = datapointer;
    loadmodel->surfmesh.num_morphframes = 0;
    for (i = 0;i < loadmodel->numframes;i++)
    {
        pinframetype = (daliasframetype_t *)datapointer;
        datapointer += sizeof(daliasframetype_t);
        if (LittleLong (pinframetype->type) == ALIAS_SINGLE)
            groupframes = 1;
        else
        {
            pinframegroup = (daliasgroup_t *)datapointer;
            datapointer += sizeof(daliasgroup_t);
            groupframes = LittleLong(pinframegroup->numframes);
            datapointer += sizeof(daliasinterval_t) * groupframes;
        }
 
        for (j = 0;j < groupframes;j++)
        {
            datapointer += sizeof(daliasframe_t);
            datapointer += sizeof(trivertx_t) * numverts;
            loadmodel->surfmesh.num_morphframes++;
        }
    }
    loadmodel->num_poses = loadmodel->surfmesh.num_morphframes;
 
    // store texture coordinates into temporary array, they will be stored
    // after usage is determined (triangle data)
    vertst = (float *)Mem_Alloc(tempmempool, numverts * 2 * sizeof(float[2]));
    vertremap = (int *)Mem_Alloc(tempmempool, numverts * 3 * sizeof(int));
    vertonseam = vertremap + numverts * 2;
 
    scales = 1.0 / skinwidth;
    scalet = 1.0 / skinheight;
    for (i = 0;i < numverts;i++)
    {
        vertonseam[i] = LittleLong(pinstverts[i].onseam);
        vertst[i*2+0] = LittleLong(pinstverts[i].s) * scales;
        vertst[i*2+1] = LittleLong(pinstverts[i].t) * scalet;
        vertst[(i+numverts)*2+0] = vertst[i*2+0] + 0.5;
        vertst[(i+numverts)*2+1] = vertst[i*2+1];
    }
 
// load triangle data
    loadmodel->surfmesh.data_element3i = (int *)Mem_Alloc(loadmodel->mempool, sizeof(int[3]) * loadmodel->surfmesh.num_triangles);
 
    // read the triangle elements
    for (i = 0;i < loadmodel->surfmesh.num_triangles;i++)
        for (j = 0;j < 3;j++)
            loadmodel->surfmesh.data_element3i[i*3+j] = LittleLong(pintriangles[i].vertindex[j]);
    // validate (note numverts is used because this is the original data)
    Mod_ValidateElements(loadmodel->surfmesh.data_element3i, NULL, loadmodel->surfmesh.num_triangles, 0, numverts, __FILE__, __LINE__);
    // now butcher the elements according to vertonseam and tri->facesfront
    // and then compact the vertex set to remove duplicates
    for (i = 0;i < loadmodel->surfmesh.num_triangles;i++)
        if (!LittleLong(pintriangles[i].facesfront)) // backface
            for (j = 0;j < 3;j++)
                if (vertonseam[loadmodel->surfmesh.data_element3i[i*3+j]])
                    loadmodel->surfmesh.data_element3i[i*3+j] += numverts;
    // count the usage
    // (this uses vertremap to count usage to save some memory)
    for (i = 0;i < numverts*2;i++)
        vertremap[i] = 0;
    for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
        vertremap[loadmodel->surfmesh.data_element3i[i]]++;
    // build remapping table and compact array
    loadmodel->surfmesh.num_vertices = 0;
    for (i = 0;i < numverts*2;i++)
    {
        if (vertremap[i])
        {
            vertremap[i] = loadmodel->surfmesh.num_vertices;
            vertst[loadmodel->surfmesh.num_vertices*2+0] = vertst[i*2+0];
            vertst[loadmodel->surfmesh.num_vertices*2+1] = vertst[i*2+1];
            loadmodel->surfmesh.num_vertices++;
        }
        else
            vertremap[i] = -1; // not used at all
    }
    // remap the elements to the new vertex set
    for (i = 0;i < loadmodel->surfmesh.num_triangles * 3;i++)
        loadmodel->surfmesh.data_element3i[i] = vertremap[loadmodel->surfmesh.data_element3i[i]];
    // store the texture coordinates
    loadmodel->surfmesh.data_texcoordtexture2f = (float *)Mem_Alloc(loadmodel->mempool, sizeof(float[2]) * loadmodel->surfmesh.num_vertices);
    for (i = 0;i < loadmodel->surfmesh.num_vertices;i++)
    {
        loadmodel->surfmesh.data_texcoordtexture2f[i*2+0] = vertst[i*2+0];
        loadmodel->surfmesh.data_texcoordtexture2f[i*2+1] = vertst[i*2+1];
    }
 
    // generate ushort elements array if possible
    if (loadmodel->surfmesh.num_vertices <= 65536)
        loadmodel->surfmesh.data_element3s = (unsigned short *)Mem_Alloc(loadmodel->mempool, sizeof(unsigned short[3]) * loadmodel->surfmesh.num_triangles);
    if (loadmodel->surfmesh.data_element3s)
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
            loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
 
// load the frames
    loadmodel->animscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numframes);
    loadmodel->surfmesh.data_morphmdlvertex = (trivertx_t *)Mem_Alloc(loadmodel->mempool, sizeof(trivertx_t) * loadmodel->surfmesh.num_morphframes * loadmodel->surfmesh.num_vertices);
    Mod_MDL_LoadFrames (startframes, numverts, vertremap);
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    Mod_Alias_MorphMesh_CompileFrames();
 
    Mem_Free(vertst);
    Mem_Free(vertremap);
 
    // load the skins
    skinfiles = Mod_LoadSkinFiles();
    if (skinfiles)
    {
        loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, loadmodel->numskins * sizeof(animscene_t));
        loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
        loadmodel->num_texturesperskin = loadmodel->num_surfaces;
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures, skinfiles, "default", "");
        Mod_FreeSkinFiles(skinfiles);
        for (i = 0;i < loadmodel->numskins;i++)
        {
            loadmodel->skinscenes[i].firstframe = i;
            loadmodel->skinscenes[i].framecount = 1;
            loadmodel->skinscenes[i].loop = true;
            loadmodel->skinscenes[i].framerate = 10;
        }
    }
    else
    {
        loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, loadmodel->numskins * sizeof(animscene_t));
        loadmodel->num_textures = loadmodel->num_surfaces * totalskins;
        loadmodel->num_texturesperskin = loadmodel->num_surfaces;
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * totalskins * sizeof(texture_t));
        totalskins = 0;
        datapointer = startskins;
        for (i = 0;i < loadmodel->numskins;i++)
        {
            pinskintype = (daliasskintype_t *)datapointer;
            datapointer += sizeof(daliasskintype_t);
 
            if (pinskintype->type == ALIAS_SKIN_SINGLE)
            {
                groupskins = 1;
                interval = 0.1f;
            }
            else
            {
                pinskingroup = (daliasskingroup_t *)datapointer;
                datapointer += sizeof(daliasskingroup_t);
 
                groupskins = LittleLong (pinskingroup->numskins);
 
                pinskinintervals = (daliasskininterval_t *)datapointer;
                datapointer += sizeof(daliasskininterval_t) * groupskins;
 
                interval = LittleFloat(pinskinintervals[0].interval);
                if (interval < 0.01f)
                {
                    Con_Printf("%s has an invalid interval %f, changing to 0.1\n", loadmodel->name, interval);
                    interval = 0.1f;
                }
            }
 
            dpsnprintf(loadmodel->skinscenes[i].name, sizeof(loadmodel->skinscenes[i].name), "skin %i", i);
            loadmodel->skinscenes[i].firstframe = totalskins;
            loadmodel->skinscenes[i].framecount = groupskins;
            loadmodel->skinscenes[i].framerate = 1.0f / interval;
            loadmodel->skinscenes[i].loop = true;
 
            for (j = 0;j < groupskins;j++)
            {
                if (groupskins > 1)
                    dpsnprintf (name, sizeof(name), "%s_%i_%i", loadmodel->name, i, j);
                else
                    dpsnprintf (name, sizeof(name), "%s_%i", loadmodel->name, i);
                if (!Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, loadmodel->data_textures + totalskins * loadmodel->num_surfaces, name, false, false, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL))
                    Mod_LoadCustomMaterial(loadmodel->mempool, loadmodel->data_textures + totalskins * loadmodel->num_surfaces, name, SUPERCONTENTS_SOLID, MATERIALFLAG_WALL, R_SkinFrame_LoadInternalQuake(name, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_PICMIP, true, r_fullbrights.integer, (unsigned char *)datapointer, skinwidth, skinheight));
                datapointer += skinwidth * skinheight;
                totalskins++;
            }
        }
        // check for skins that don't exist in the model, but do exist as external images
        // (this was added because yummyluv kept pestering me about support for it)
        // TODO: support shaders here?
        for (;;)
        {
            dpsnprintf(name, sizeof(name), "%s_%i", loadmodel->name, loadmodel->numskins);
            tempskinframe = R_SkinFrame_LoadExternal(name, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS, false, false);
            if (!tempskinframe)
                break;
            // expand the arrays to make room
            tempskinscenes = loadmodel->skinscenes;
            loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, (loadmodel->numskins + 1) * sizeof(animscene_t));
            memcpy(loadmodel->skinscenes, tempskinscenes, loadmodel->numskins * sizeof(animscene_t));
            Mem_Free(tempskinscenes);
 
            tempaliasskins = loadmodel->data_textures;
            loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * (totalskins + 1) * sizeof(texture_t));
            memcpy(loadmodel->data_textures, tempaliasskins, loadmodel->num_surfaces * totalskins * sizeof(texture_t));
            Mem_Free(tempaliasskins);
 
            // store the info about the new skin
            Mod_LoadCustomMaterial(loadmodel->mempool, loadmodel->data_textures + totalskins * loadmodel->num_surfaces, name, SUPERCONTENTS_SOLID, MATERIALFLAG_WALL, tempskinframe);
            dp_strlcpy(loadmodel->skinscenes[loadmodel->numskins].name, name, sizeof(loadmodel->skinscenes[loadmodel->numskins].name));
            loadmodel->skinscenes[loadmodel->numskins].firstframe = totalskins;
            loadmodel->skinscenes[loadmodel->numskins].framecount = 1;
            loadmodel->skinscenes[loadmodel->numskins].framerate = 10.0f;
            loadmodel->skinscenes[loadmodel->numskins].loop = true;
 
            //increase skin counts
            loadmodel->num_textures++;
            loadmodel->numskins++;
            totalskins++;
 
            // fix up the pointers since they are pointing at the old textures array
            // FIXME: this is a hack!
            for (j = 0;j < loadmodel->numskins * loadmodel->num_surfaces;j++)
                loadmodel->data_textures[j].currentframe = &loadmodel->data_textures[j];
        }
    }
 
    surface = loadmodel->data_surfaces;
    surface->texture = loadmodel->data_textures;
    surface->num_firsttriangle = 0;
    surface->num_triangles = loadmodel->surfmesh.num_triangles;
    surface->num_firstvertex = 0;
    surface->num_vertices = loadmodel->surfmesh.num_vertices;
 
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
void Mod_IDP2_Load(model_t *mod, void *buffer, void *bufferend)
{
    int i, j, hashindex, numxyz, numst, xyz, st, skinwidth, skinheight, *vertremap, version, end;
    float iskinwidth, iskinheight;
    unsigned char *data;
    msurface_t *surface;
    md2_t *pinmodel;
    unsigned char *base, *datapointer;
    md2frame_t *pinframe;
    char *inskin;
    md2triangle_t *intri;
    unsigned short *inst;
    struct md2verthash_s
    {
        struct md2verthash_s *next;
        unsigned short xyz;
        unsigned short st;
    }
    *hash, **md2verthash, *md2verthashdata;
    skinfile_t *skinfiles;
 
    pinmodel = (md2_t *)buffer;
    base = (unsigned char *)buffer;
 
    version = LittleLong (pinmodel->version);
    if (version != MD2ALIAS_VERSION)
        Host_Error ("%s has wrong version number (%i should be %i)",
            loadmodel->name, version, MD2ALIAS_VERSION);
 
    loadmodel->modeldatatypestring = "MD2";
 
    loadmodel->type = mod_alias;
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_MDL_AnimateVertices;
 
    if (LittleLong(pinmodel->num_tris) < 1 || LittleLong(pinmodel->num_tris) > 65536)
        Host_Error ("%s has invalid number of triangles: %i", loadmodel->name, LittleLong(pinmodel->num_tris));
    if (LittleLong(pinmodel->num_xyz) < 1 || LittleLong(pinmodel->num_xyz) > 65536)
        Host_Error ("%s has invalid number of vertices: %i", loadmodel->name, LittleLong(pinmodel->num_xyz));
    if (LittleLong(pinmodel->num_frames) < 1 || LittleLong(pinmodel->num_frames) > 65536)
        Host_Error ("%s has invalid number of frames: %i", loadmodel->name, LittleLong(pinmodel->num_frames));
    if (LittleLong(pinmodel->num_skins) < 0 || LittleLong(pinmodel->num_skins) > 256)
        Host_Error ("%s has invalid number of skins: %i", loadmodel->name, LittleLong(pinmodel->num_skins));
 
    end = LittleLong(pinmodel->ofs_end);
    if (LittleLong(pinmodel->num_skins) >= 1 && (LittleLong(pinmodel->ofs_skins) <= 0 || LittleLong(pinmodel->ofs_skins) >= end))
        Host_Error ("%s is not a valid model", loadmodel->name);
    if (LittleLong(pinmodel->ofs_st) <= 0 || LittleLong(pinmodel->ofs_st) >= end)
        Host_Error ("%s is not a valid model", loadmodel->name);
    if (LittleLong(pinmodel->ofs_tris) <= 0 || LittleLong(pinmodel->ofs_tris) >= end)
        Host_Error ("%s is not a valid model", loadmodel->name);
    if (LittleLong(pinmodel->ofs_frames) <= 0 || LittleLong(pinmodel->ofs_frames) >= end)
        Host_Error ("%s is not a valid model", loadmodel->name);
    if (LittleLong(pinmodel->ofs_glcmds) <= 0 || LittleLong(pinmodel->ofs_glcmds) >= end)
        Host_Error ("%s is not a valid model", loadmodel->name);
 
    loadmodel->numskins = LittleLong(pinmodel->num_skins);
    numxyz = LittleLong(pinmodel->num_xyz);
    numst = LittleLong(pinmodel->num_st);
    loadmodel->surfmesh.num_triangles = LittleLong(pinmodel->num_tris);
    loadmodel->numframes = LittleLong(pinmodel->num_frames);
    loadmodel->surfmesh.num_morphframes = loadmodel->numframes;
    loadmodel->num_poses = loadmodel->surfmesh.num_morphframes;
    skinwidth = LittleLong(pinmodel->skinwidth);
    skinheight = LittleLong(pinmodel->skinheight);
    iskinwidth = 1.0f / skinwidth;
    iskinheight = 1.0f / skinheight;
 
    loadmodel->num_surfaces = 1;
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces;
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * sizeof(msurface_t) + loadmodel->num_surfaces * sizeof(int) + loadmodel->numframes * sizeof(animscene_t) + loadmodel->numframes * sizeof(float[6]) + loadmodel->surfmesh.num_triangles * sizeof(int[3]));
    loadmodel->data_surfaces = (msurface_t *)data;data += loadmodel->num_surfaces * sizeof(msurface_t);
    loadmodel->modelsurfaces_sorted = (int *)data;data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->modelsurfaces_sorted[0] = 0;
    loadmodel->animscenes = (animscene_t *)data;data += loadmodel->numframes * sizeof(animscene_t);
    loadmodel->surfmesh.data_morphmd2framesize6f = (float *)data;data += loadmodel->numframes * sizeof(float[6]);
    loadmodel->surfmesh.data_element3i = (int *)data;data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
 
    loadmodel->synctype = ST_RAND;
 
    // load the skins
    inskin = (char *)(base + LittleLong(pinmodel->ofs_skins));
    skinfiles = Mod_LoadSkinFiles();
    if (skinfiles)
    {
        loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
        loadmodel->num_texturesperskin = loadmodel->num_surfaces;
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures, skinfiles, "default", "");
        Mod_FreeSkinFiles(skinfiles);
    }
    else if (loadmodel->numskins)
    {
        // skins found (most likely not a player model)
        loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
        loadmodel->num_texturesperskin = loadmodel->num_surfaces;
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
        for (i = 0;i < loadmodel->numskins;i++, inskin += MD2_SKINNAME)
            Mod_LoadTextureFromQ3Shader(loadmodel->mempool, loadmodel->name, loadmodel->data_textures + i * loadmodel->num_surfaces, inskin, true, true, (r_mipskins.integer ? TEXF_MIPMAP : 0) | TEXF_ALPHA | TEXF_PICMIP | TEXF_COMPRESS, MATERIALFLAG_WALL);
    }
    else
    {
        // no skins (most likely a player model)
        loadmodel->numskins = 1;
        loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
        loadmodel->num_texturesperskin = loadmodel->num_surfaces;
        loadmodel->data_textures = (texture_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
        Mod_LoadCustomMaterial(loadmodel->mempool, loadmodel->data_textures, loadmodel->name, SUPERCONTENTS_SOLID, MATERIALFLAG_WALL, R_SkinFrame_LoadMissing());
    }
 
    loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // load the triangles and stvert data
    inst = (unsigned short *)(base + LittleLong(pinmodel->ofs_st));
    intri = (md2triangle_t *)(base + LittleLong(pinmodel->ofs_tris));
    md2verthash = (struct md2verthash_s **)Mem_Alloc(tempmempool, 65536 * sizeof(hash));
    md2verthashdata = (struct md2verthash_s *)Mem_Alloc(tempmempool, loadmodel->surfmesh.num_triangles * 3 * sizeof(*hash));
    // swap the triangle list
    loadmodel->surfmesh.num_vertices = 0;
    for (i = 0;i < loadmodel->surfmesh.num_triangles;i++)
    {
        for (j = 0;j < 3;j++)
        {
            xyz = (unsigned short) LittleShort (intri[i].index_xyz[j]);
            st = (unsigned short) LittleShort (intri[i].index_st[j]);
            if (xyz >= numxyz)
            {
                Con_Printf("%s has an invalid xyz index (%i) on triangle %i, resetting to 0\n", loadmodel->name, xyz, i);
                xyz = 0;
            }
            if (st >= numst)
            {
                Con_Printf("%s has an invalid st index (%i) on triangle %i, resetting to 0\n", loadmodel->name, st, i);
                st = 0;
            }
            hashindex = (xyz * 256 + st) & 65535;
            for (hash = md2verthash[hashindex];hash;hash = hash->next)
                if (hash->xyz == xyz && hash->st == st)
                    break;
            if (hash == NULL)
            {
                hash = md2verthashdata + loadmodel->surfmesh.num_vertices++;
                hash->xyz = xyz;
                hash->st = st;
                hash->next = md2verthash[hashindex];
                md2verthash[hashindex] = hash;
            }
            loadmodel->surfmesh.data_element3i[i*3+j] = (hash - md2verthashdata);
        }
    }
 
    vertremap = (int *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(int));
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool, loadmodel->surfmesh.num_vertices * sizeof(float[2]) + loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t));
    loadmodel->surfmesh.data_texcoordtexture2f = (float *)data;data += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
    loadmodel->surfmesh.data_morphmdlvertex = (trivertx_t *)data;data += loadmodel->surfmesh.num_vertices * loadmodel->surfmesh.num_morphframes * sizeof(trivertx_t);
    for (i = 0;i < loadmodel->surfmesh.num_vertices;i++)
    {
        int sts, stt;
        hash = md2verthashdata + i;
        vertremap[i] = hash->xyz;
        sts = LittleShort(inst[hash->st*2+0]);
        stt = LittleShort(inst[hash->st*2+1]);
        if (sts < 0 || sts >= skinwidth || stt < 0 || stt >= skinheight)
        {
            Con_Printf("%s has an invalid skin coordinate (%i %i) on vert %i, changing to 0 0\n", loadmodel->name, sts, stt, i);
            sts = 0;
            stt = 0;
        }
        loadmodel->surfmesh.data_texcoordtexture2f[i*2+0] = sts * iskinwidth;
        loadmodel->surfmesh.data_texcoordtexture2f[i*2+1] = stt * iskinheight;
    }
 
    Mem_Free(md2verthash);
    Mem_Free(md2verthashdata);
 
    // generate ushort elements array if possible
    if (loadmodel->surfmesh.num_vertices <= 65536)
        loadmodel->surfmesh.data_element3s = (unsigned short *)Mem_Alloc(loadmodel->mempool, sizeof(unsigned short[3]) * loadmodel->surfmesh.num_triangles);
    if (loadmodel->surfmesh.data_element3s)
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
            loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
 
    // load the frames
    datapointer = (base + LittleLong(pinmodel->ofs_frames));
    for (i = 0;i < loadmodel->surfmesh.num_morphframes;i++)
    {
        int k;
        trivertx_t *v;
        trivertx_t *out;
        pinframe = (md2frame_t *)datapointer;
        datapointer += sizeof(md2frame_t);
        // store the frame scale/translate into the appropriate array
        for (j = 0;j < 3;j++)
        {
            loadmodel->surfmesh.data_morphmd2framesize6f[i*6+j] = LittleFloat(pinframe->scale[j]);
            loadmodel->surfmesh.data_morphmd2framesize6f[i*6+3+j] = LittleFloat(pinframe->translate[j]);
        }
        // convert the vertices
        v = (trivertx_t *)datapointer;
        out = loadmodel->surfmesh.data_morphmdlvertex + i * loadmodel->surfmesh.num_vertices;
        for (k = 0;k < loadmodel->surfmesh.num_vertices;k++)
            out[k] = v[vertremap[k]];
        datapointer += numxyz * sizeof(trivertx_t);
 
        dp_strlcpy(loadmodel->animscenes[i].name, pinframe->name, sizeof(loadmodel->animscenes[i].name));
        loadmodel->animscenes[i].firstframe = i;
        loadmodel->animscenes[i].framecount = 1;
        loadmodel->animscenes[i].framerate = 10;
        loadmodel->animscenes[i].loop = true;
    }
 
    Mem_Free(vertremap);
 
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    Mod_Alias_MorphMesh_CompileFrames();
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    surface = loadmodel->data_surfaces;
    surface->texture = loadmodel->data_textures;
    surface->num_firsttriangle = 0;
    surface->num_triangles = loadmodel->surfmesh.num_triangles;
    surface->num_firstvertex = 0;
    surface->num_vertices = loadmodel->surfmesh.num_vertices;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
void Mod_IDP3_Load(model_t *mod, void *buffer, void *bufferend)
{
    int i, j, k, version, meshvertices, meshtriangles;
    unsigned char *data;
    msurface_t *surface;
    md3modelheader_t *pinmodel;
    md3frameinfo_t *pinframe;
    md3mesh_t *pinmesh;
    md3tag_t *pintag;
    skinfile_t *skinfiles;
 
    pinmodel = (md3modelheader_t *)buffer;
 
    if (memcmp(pinmodel->identifier, "IDP3", 4))
        Host_Error ("%s is not a MD3 (IDP3) file", loadmodel->name);
    version = LittleLong (pinmodel->version);
    if (version != MD3VERSION)
        Host_Error ("%s has wrong version number (%i should be %i)",
            loadmodel->name, version, MD3VERSION);
 
    skinfiles = Mod_LoadSkinFiles();
    if (loadmodel->numskins < 1)
        loadmodel->numskins = 1;
 
    loadmodel->modeldatatypestring = "MD3";
 
    loadmodel->type = mod_alias;
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_MD3_AnimateVertices;
    loadmodel->synctype = ST_RAND;
    // convert model flags to EF flags (MF_ROCKET becomes EF_ROCKET, etc)
    i = LittleLong (pinmodel->flags);
    loadmodel->effects = (((unsigned)i & 255) << 24) | (i & 0x00FFFF00);
 
    // set up some global info about the model
    loadmodel->numframes = LittleLong(pinmodel->num_frames);
    loadmodel->num_surfaces = LittleLong(pinmodel->num_meshes);
 
    // make skinscenes for the skins (no groups)
    loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // load frameinfo
    loadmodel->animscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, loadmodel->numframes * sizeof(animscene_t));
    for (i = 0, pinframe = (md3frameinfo_t *)((unsigned char *)pinmodel + LittleLong(pinmodel->lump_frameinfo));i < loadmodel->numframes;i++, pinframe++)
    {
        dp_strlcpy(loadmodel->animscenes[i].name, pinframe->name, sizeof(loadmodel->animscenes[i].name));
        loadmodel->animscenes[i].firstframe = i;
        loadmodel->animscenes[i].framecount = 1;
        loadmodel->animscenes[i].framerate = 10;
        loadmodel->animscenes[i].loop = true;
    }
 
    // load tags
    loadmodel->num_tagframes = loadmodel->numframes;
    loadmodel->num_tags = LittleLong(pinmodel->num_tags);
    loadmodel->data_tags = (aliastag_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_tagframes * loadmodel->num_tags * sizeof(aliastag_t));
    for (i = 0, pintag = (md3tag_t *)((unsigned char *)pinmodel + LittleLong(pinmodel->lump_tags));i < loadmodel->num_tagframes * loadmodel->num_tags;i++, pintag++)
    {
        dp_strlcpy(loadmodel->data_tags[i].name, pintag->name, sizeof(loadmodel->data_tags[i].name));
        for (j = 0;j < 9;j++)
            loadmodel->data_tags[i].matrixgl[j] = LittleFloat(pintag->rotationmatrix[j]);
        for (j = 0;j < 3;j++)
            loadmodel->data_tags[i].matrixgl[9+j] = LittleFloat(pintag->origin[j]);
        //Con_Printf("model \"%s\" frame #%i tag #%i \"%s\"\n", loadmodel->name, i / loadmodel->num_tags, i % loadmodel->num_tags, loadmodel->data_tags[i].name);
    }
 
    // load meshes
    meshvertices = 0;
    meshtriangles = 0;
    for (i = 0, pinmesh = (md3mesh_t *)((unsigned char *)pinmodel + LittleLong(pinmodel->lump_meshes));i < loadmodel->num_surfaces;i++, pinmesh = (md3mesh_t *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_end)))
    {
        if (memcmp(pinmesh->identifier, "IDP3", 4))
            Host_Error("Mod_IDP3_Load: invalid mesh identifier (not IDP3)");
        if (LittleLong(pinmesh->num_frames) != loadmodel->numframes)
            Host_Error("Mod_IDP3_Load: mesh numframes differs from header");
        meshvertices += LittleLong(pinmesh->num_vertices);
        meshtriangles += LittleLong(pinmesh->num_triangles);
    }
 
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces;
    loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
    loadmodel->num_texturesperskin = loadmodel->num_surfaces;
    loadmodel->surfmesh.num_vertices = meshvertices;
    loadmodel->surfmesh.num_triangles = meshtriangles;
    loadmodel->surfmesh.num_morphframes = loadmodel->numframes; // TODO: remove?
    loadmodel->num_poses = loadmodel->surfmesh.num_morphframes;
 
    // do most allocations as one merged chunk
    // This is only robust for C standard types!
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool,
        meshvertices * sizeof(float[2])
        + loadmodel->num_surfaces * sizeof(int)
        + meshtriangles * sizeof(int[3])
        + (meshvertices <= 65536 ? meshtriangles * sizeof(unsigned short[3]) : 0));
    // Pointers must be taken in descending order of alignment requirement!
    loadmodel->surfmesh.data_texcoordtexture2f        = (float *)data; data += meshvertices * sizeof(float[2]);
    loadmodel->modelsurfaces_sorted                     = (int *)data; data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->surfmesh.data_element3i                  = (int *)data; data += meshtriangles * sizeof(int[3]);
    if (meshvertices <= 65536)
    {
        loadmodel->surfmesh.data_element3s = (unsigned short *)data; data += meshtriangles * sizeof(unsigned short[3]);
    }
    // Struct alignment requirements could change so we can't assume them here
    // otherwise a safe-looking commit could introduce undefined behaviour!
    loadmodel->data_surfaces = Mem_AllocType(loadmodel->mempool, msurface_t, loadmodel->num_surfaces * sizeof(msurface_t));
    loadmodel->data_textures = Mem_AllocType(loadmodel->mempool, texture_t, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
    loadmodel->surfmesh.data_morphmd3vertex = Mem_AllocType(loadmodel->mempool, md3vertex_t, meshvertices * loadmodel->numframes * sizeof(md3vertex_t));
 
    meshvertices = 0;
    meshtriangles = 0;
    for (i = 0, pinmesh = (md3mesh_t *)((unsigned char *)pinmodel + LittleLong(pinmodel->lump_meshes));i < loadmodel->num_surfaces;i++, pinmesh = (md3mesh_t *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_end)))
    {
        if (memcmp(pinmesh->identifier, "IDP3", 4))
            Host_Error("Mod_IDP3_Load: invalid mesh identifier (not IDP3)");
        loadmodel->modelsurfaces_sorted[i] = i;
        surface = loadmodel->data_surfaces + i;
        surface->texture = loadmodel->data_textures + i;
        surface->num_firsttriangle = meshtriangles;
        surface->num_triangles = LittleLong(pinmesh->num_triangles);
        surface->num_firstvertex = meshvertices;
        surface->num_vertices = LittleLong(pinmesh->num_vertices);
        meshvertices += surface->num_vertices;
        meshtriangles += surface->num_triangles;
 
        for (j = 0;j < surface->num_triangles * 3;j++)
        {
            int e = surface->num_firstvertex + LittleLong(((int *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_elements)))[j]);
            loadmodel->surfmesh.data_element3i[j + surface->num_firsttriangle * 3] = e;
            if (loadmodel->surfmesh.data_element3s)
                loadmodel->surfmesh.data_element3s[j + surface->num_firsttriangle * 3] = e;
        }
        for (j = 0;j < surface->num_vertices;j++)
        {
            loadmodel->surfmesh.data_texcoordtexture2f[(j + surface->num_firstvertex) * 2 + 0] = LittleFloat(((float *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_texcoords)))[j * 2 + 0]);
            loadmodel->surfmesh.data_texcoordtexture2f[(j + surface->num_firstvertex) * 2 + 1] = LittleFloat(((float *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_texcoords)))[j * 2 + 1]);
        }
        for (j = 0;j < loadmodel->numframes;j++)
        {
            const md3vertex_t *in = (md3vertex_t *)((unsigned char *)pinmesh + LittleLong(pinmesh->lump_framevertices)) + j * surface->num_vertices;
            md3vertex_t *out = loadmodel->surfmesh.data_morphmd3vertex + surface->num_firstvertex + j * loadmodel->surfmesh.num_vertices;
            for (k = 0;k < surface->num_vertices;k++, in++, out++)
            {
                out->origin[0] = LittleShort(in->origin[0]);
                out->origin[1] = LittleShort(in->origin[1]);
                out->origin[2] = LittleShort(in->origin[2]);
                out->pitch = in->pitch;
                out->yaw = in->yaw;
            }
        }
 
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + i, skinfiles, pinmesh->name, LittleLong(pinmesh->num_shaders) >= 1 ? ((md3shader_t *)((unsigned char *) pinmesh + LittleLong(pinmesh->lump_shaders)))->name : "");
 
        Mod_ValidateElements(loadmodel->surfmesh.data_element3i + surface->num_firsttriangle * 3, loadmodel->surfmesh.data_element3s + surface->num_firsttriangle * 3, surface->num_triangles, surface->num_firstvertex, surface->num_vertices, __FILE__, __LINE__);
    }
    Mod_Alias_MorphMesh_CompileFrames();
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    Mod_FreeSkinFiles(skinfiles);
    Mod_MakeSortedSurfaces(loadmodel);
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
void Mod_ZYMOTICMODEL_Load(model_t *mod, void *buffer, void *bufferend)
{
    zymtype1header_t *pinmodel, *pheader;
    unsigned char *pbase;
    int i, j, k, numposes, meshvertices, meshtriangles, *bonecount, *vertbonecounts, count, *renderlist, *renderlistend, *outelements;
    float modelradius, corner[2], *poses, *intexcoord2f, *outtexcoord2f, *bonepose, f, biggestorigin, tempvec[3], modelscale;
    zymvertex_t *verts, *vertdata;
    zymscene_t *scene;
    zymbone_t *bone;
    char *shadername;
    skinfile_t *skinfiles;
    unsigned char *data;
    msurface_t *surface;
 
    pinmodel = (zymtype1header_t *)buffer;
    pbase = (unsigned char *)buffer;
    if (memcmp(pinmodel->id, "ZYMOTICMODEL", 12))
        Host_Error ("Mod_ZYMOTICMODEL_Load: %s is not a zymotic model", loadmodel->name);
    if (BigLong(pinmodel->type) != 1)
        Host_Error ("Mod_ZYMOTICMODEL_Load: only type 1 (skeletal pose) models are currently supported (name = %s)", loadmodel->name);
 
    loadmodel->modeldatatypestring = "ZYM";
 
    loadmodel->type = mod_alias;
    loadmodel->synctype = ST_RAND;
 
    // byteswap header
    pheader = pinmodel;
    pheader->type = BigLong(pinmodel->type);
    pheader->filesize = BigLong(pinmodel->filesize);
    pheader->mins[0] = BigFloat(pinmodel->mins[0]);
    pheader->mins[1] = BigFloat(pinmodel->mins[1]);
    pheader->mins[2] = BigFloat(pinmodel->mins[2]);
    pheader->maxs[0] = BigFloat(pinmodel->maxs[0]);
    pheader->maxs[1] = BigFloat(pinmodel->maxs[1]);
    pheader->maxs[2] = BigFloat(pinmodel->maxs[2]);
    pheader->radius = BigFloat(pinmodel->radius);
    pheader->numverts = BigLong(pinmodel->numverts);
    pheader->numtris = BigLong(pinmodel->numtris);
    pheader->numshaders = BigLong(pinmodel->numshaders);
    pheader->numbones = BigLong(pinmodel->numbones);
    pheader->numscenes = BigLong(pinmodel->numscenes);
    pheader->lump_scenes.start = BigLong(pinmodel->lump_scenes.start);
    pheader->lump_scenes.length = BigLong(pinmodel->lump_scenes.length);
    pheader->lump_poses.start = BigLong(pinmodel->lump_poses.start);
    pheader->lump_poses.length = BigLong(pinmodel->lump_poses.length);
    pheader->lump_bones.start = BigLong(pinmodel->lump_bones.start);
    pheader->lump_bones.length = BigLong(pinmodel->lump_bones.length);
    pheader->lump_vertbonecounts.start = BigLong(pinmodel->lump_vertbonecounts.start);
    pheader->lump_vertbonecounts.length = BigLong(pinmodel->lump_vertbonecounts.length);
    pheader->lump_verts.start = BigLong(pinmodel->lump_verts.start);
    pheader->lump_verts.length = BigLong(pinmodel->lump_verts.length);
    pheader->lump_texcoords.start = BigLong(pinmodel->lump_texcoords.start);
    pheader->lump_texcoords.length = BigLong(pinmodel->lump_texcoords.length);
    pheader->lump_render.start = BigLong(pinmodel->lump_render.start);
    pheader->lump_render.length = BigLong(pinmodel->lump_render.length);
    pheader->lump_shaders.start = BigLong(pinmodel->lump_shaders.start);
    pheader->lump_shaders.length = BigLong(pinmodel->lump_shaders.length);
    pheader->lump_trizone.start = BigLong(pinmodel->lump_trizone.start);
    pheader->lump_trizone.length = BigLong(pinmodel->lump_trizone.length);
 
    if (pheader->numtris < 1 || pheader->numverts < 3 || pheader->numshaders < 1)
    {
        Con_Printf("%s has no geometry\n", loadmodel->name);
        return;
    }
    if (pheader->numscenes < 1 || pheader->lump_poses.length < (int)sizeof(float[3][4]))
    {
        Con_Printf("%s has no animations\n", loadmodel->name);
        return;
    }
 
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_Skeletal_AnimateVertices;
 
    loadmodel->numframes = pheader->numscenes;
    loadmodel->num_surfaces = pheader->numshaders;
 
    skinfiles = Mod_LoadSkinFiles();
    if (loadmodel->numskins < 1)
        loadmodel->numskins = 1;
 
    // make skinscenes for the skins (no groups)
    loadmodel->skinscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numskins);
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // model bbox
    // LadyHavoc: actually we blow this away later with Mod_Alias_CalculateBoundingBox()
    modelradius = pheader->radius;
    for (i = 0;i < 3;i++)
    {
        loadmodel->normalmins[i] = pheader->mins[i];
        loadmodel->normalmaxs[i] = pheader->maxs[i];
        loadmodel->rotatedmins[i] = -modelradius;
        loadmodel->rotatedmaxs[i] = modelradius;
    }
    corner[0] = max(fabs(loadmodel->normalmins[0]), fabs(loadmodel->normalmaxs[0]));
    corner[1] = max(fabs(loadmodel->normalmins[1]), fabs(loadmodel->normalmaxs[1]));
    loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] = sqrt(corner[0]*corner[0]+corner[1]*corner[1]);
    if (loadmodel->yawmaxs[0] > modelradius)
        loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] = modelradius;
    loadmodel->yawmins[0] = loadmodel->yawmins[1] = -loadmodel->yawmaxs[0];
    loadmodel->yawmins[2] = loadmodel->normalmins[2];
    loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
    loadmodel->radius = modelradius;
    loadmodel->radius2 = modelradius * modelradius;
 
    // go through the lumps, swapping things
 
    //zymlump_t lump_scenes; // zymscene_t scene[numscenes]; // name and other information for each scene (see zymscene struct)
    loadmodel->animscenes = (animscene_t *)Mem_Alloc(loadmodel->mempool, sizeof(animscene_t) * loadmodel->numframes);
    scene = (zymscene_t *) (pheader->lump_scenes.start + pbase);
    numposes = pheader->lump_poses.length / pheader->numbones / sizeof(float[3][4]);
    for (i = 0;i < pheader->numscenes;i++)
    {
        memcpy(loadmodel->animscenes[i].name, scene->name, 32);
        loadmodel->animscenes[i].firstframe = BigLong(scene->start);
        loadmodel->animscenes[i].framecount = BigLong(scene->length);
        loadmodel->animscenes[i].framerate = BigFloat(scene->framerate);
        loadmodel->animscenes[i].loop = (BigLong(scene->flags) & ZYMSCENEFLAG_NOLOOP) == 0;
        if ((unsigned int) loadmodel->animscenes[i].firstframe >= (unsigned int) numposes)
            Host_Error("%s scene->firstframe (%i) >= numposes (%i)", loadmodel->name, loadmodel->animscenes[i].firstframe, numposes);
        if ((unsigned int) loadmodel->animscenes[i].firstframe + (unsigned int) loadmodel->animscenes[i].framecount > (unsigned int) numposes)
            Host_Error("%s scene->firstframe (%i) + framecount (%i) >= numposes (%i)", loadmodel->name, loadmodel->animscenes[i].firstframe, loadmodel->animscenes[i].framecount, numposes);
        if (loadmodel->animscenes[i].framerate < 0)
            Host_Error("%s scene->framerate (%f) < 0", loadmodel->name, loadmodel->animscenes[i].framerate);
        scene++;
    }
 
    //zymlump_t lump_bones; // zymbone_t bone[numbones];
    loadmodel->num_bones = pheader->numbones;
    loadmodel->data_bones = (aliasbone_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_bones * sizeof(aliasbone_t));
    bone = (zymbone_t *) (pheader->lump_bones.start + pbase);
    for (i = 0;i < pheader->numbones;i++)
    {
        memcpy(loadmodel->data_bones[i].name, bone[i].name, sizeof(bone[i].name));
        loadmodel->data_bones[i].flags = BigLong(bone[i].flags);
        loadmodel->data_bones[i].parent = BigLong(bone[i].parent);
        if (loadmodel->data_bones[i].parent >= i)
            Host_Error("%s bone[%i].parent >= %i", loadmodel->name, i, i);
    }
 
    //zymlump_t lump_vertbonecounts; // int vertbonecounts[numvertices]; // how many bones influence each vertex (separate mainly to make this compress better)
    vertbonecounts = (int *)Mem_Alloc(loadmodel->mempool, pheader->numverts * sizeof(int));
    bonecount = (int *) (pheader->lump_vertbonecounts.start + pbase);
    for (i = 0;i < pheader->numverts;i++)
    {
        vertbonecounts[i] = BigLong(bonecount[i]);
        if (vertbonecounts[i] != 1)
            Host_Error("%s bonecount[%i] != 1 (vertex weight support is impossible in this format)", loadmodel->name, i);
    }
 
    loadmodel->num_poses = pheader->lump_poses.length / sizeof(float[3][4]) / loadmodel->num_bones;
 
    meshvertices = pheader->numverts;
    meshtriangles = pheader->numtris;
 
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces;
    loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
    loadmodel->num_texturesperskin = loadmodel->num_surfaces;
    loadmodel->surfmesh.num_vertices = meshvertices;
    loadmodel->surfmesh.num_triangles = meshtriangles;
    loadmodel->surfmesh.num_blends = 0;
    loadmodel->surfmesh.data_blendweights = NULL;
 
    // do most allocations as one merged chunk
    // This is only robust for C standard types!
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool,
        loadmodel->num_surfaces * sizeof(int)
        + meshtriangles * sizeof(int[3])
        + (meshvertices <= 65536 ? loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]) : 0)
        + meshvertices * (sizeof(float[14]) + sizeof(unsigned short) + sizeof(unsigned char[2][4]))
        + loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7])
        + loadmodel->num_bones * sizeof(float[12]));
    // Pointers must be taken in descending order of alignment requirement!
    loadmodel->surfmesh.data_vertex3f          = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_svector3f         = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_tvector3f         = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_normal3f          = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_texcoordtexture2f = (float *)data; data += meshvertices * sizeof(float[2]);
    loadmodel->data_baseboneposeinverse        = (float *)data; data += loadmodel->num_bones * sizeof(float[12]);
    loadmodel->modelsurfaces_sorted              = (int *)data; data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->surfmesh.data_element3i           = (int *)data; data += meshtriangles * sizeof(int[3]);
    loadmodel->surfmesh.blends        = (unsigned short *)data; data += meshvertices * sizeof(unsigned short);
    if (loadmodel->surfmesh.num_vertices <= 65536)
    {
        loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
    }
    loadmodel->data_poses7s                            = (short *)data; data += loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7]);
    loadmodel->surfmesh.data_skeletalindex4ub  = (unsigned char *)data; data += meshvertices * sizeof(unsigned char[4]);
    loadmodel->surfmesh.data_skeletalweight4ub = (unsigned char *)data; data += meshvertices * sizeof(unsigned char[4]);
    // Struct alignment requirements could change so we can't assume them here
    // otherwise a safe-looking commit could introduce undefined behaviour!
    loadmodel->data_surfaces = Mem_AllocType(loadmodel->mempool, msurface_t, loadmodel->num_surfaces * sizeof(msurface_t));
    loadmodel->data_textures = Mem_AllocType(loadmodel->mempool, texture_t, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
 
    //zymlump_t lump_poses; // float pose[numposes][numbones][3][4]; // animation data
    poses = (float *) (pheader->lump_poses.start + pbase);
    // figure out scale of model from root bone, for compatibility with old zmodel versions
    tempvec[0] = BigFloat(poses[0]);
    tempvec[1] = BigFloat(poses[1]);
    tempvec[2] = BigFloat(poses[2]);
    modelscale = VectorLength(tempvec);
    biggestorigin = 0;
    for (i = 0;i < loadmodel->num_bones * numposes * 12;i++)
    {
        f = fabs(BigFloat(poses[i]));
        biggestorigin = max(biggestorigin, f);
    }
    loadmodel->num_posescale = biggestorigin / 32767.0f;
    loadmodel->num_poseinvscale = 1.0f / loadmodel->num_posescale;
    for (i = 0;i < numposes;i++)
    {
        const float *frameposes = (float *) (pheader->lump_poses.start + pbase) + 12*i*loadmodel->num_bones;
        for (j = 0;j < loadmodel->num_bones;j++)
        {
            float pose[12];
            matrix4x4_t posematrix;
            for (k = 0;k < 12;k++)
                pose[k] = BigFloat(frameposes[j*12+k]);
            //if (j < loadmodel->num_bones)
            //  Con_Printf("%s: bone %i = %f %f %f %f : %f %f %f %f : %f %f %f %f : scale = %f\n", loadmodel->name, j, pose[0], pose[1], pose[2], pose[3], pose[4], pose[5], pose[6], pose[7], pose[8], pose[9], pose[10], pose[11], VectorLength(pose));
            // scale child bones to match the root scale
            if (loadmodel->data_bones[j].parent >= 0)
            {
                pose[3] *= modelscale;
                pose[7] *= modelscale;
                pose[11] *= modelscale;
            }
            // normalize rotation matrix
            VectorNormalize(pose + 0);
            VectorNormalize(pose + 4);
            VectorNormalize(pose + 8);
            Matrix4x4_FromArray12FloatD3D(&posematrix, pose);
            Matrix4x4_ToBonePose7s(&posematrix, loadmodel->num_poseinvscale, loadmodel->data_poses7s + 7*(i*loadmodel->num_bones+j));
        }
    }
 
    //zymlump_t lump_verts; // zymvertex_t vert[numvertices]; // see vertex struct
    verts = (zymvertex_t *)Mem_Alloc(loadmodel->mempool, pheader->lump_verts.length);
    vertdata = (zymvertex_t *) (pheader->lump_verts.start + pbase);
    // reconstruct frame 0 matrices to allow reconstruction of the base mesh
    // (converting from weight-blending skeletal animation to
    //  deformation-based skeletal animation)
    bonepose = (float *)Z_Malloc(loadmodel->num_bones * sizeof(float[12]));
    for (i = 0;i < loadmodel->num_bones;i++)
    {
        float m[12];
        for (k = 0;k < 12;k++)
            m[k] = BigFloat(poses[i*12+k]);
        if (loadmodel->data_bones[i].parent >= 0)
            R_ConcatTransforms(bonepose + 12 * loadmodel->data_bones[i].parent, m, bonepose + 12 * i);
        else
            for (k = 0;k < 12;k++)
                bonepose[12*i+k] = m[k];
    }
    for (j = 0;j < pheader->numverts;j++)
    {
        // this format really should have had a per vertexweight weight value...
        // but since it does not, the weighting is completely ignored and
        // only one weight is allowed per vertex
        int boneindex = BigLong(vertdata[j].bonenum);
        const float *m = bonepose + 12 * boneindex;
        float relativeorigin[3];
        relativeorigin[0] = BigFloat(vertdata[j].origin[0]);
        relativeorigin[1] = BigFloat(vertdata[j].origin[1]);
        relativeorigin[2] = BigFloat(vertdata[j].origin[2]);
        // transform the vertex bone weight into the base mesh
        loadmodel->surfmesh.data_vertex3f[j*3+0] = relativeorigin[0] * m[0] + relativeorigin[1] * m[1] + relativeorigin[2] * m[ 2] + m[ 3];
        loadmodel->surfmesh.data_vertex3f[j*3+1] = relativeorigin[0] * m[4] + relativeorigin[1] * m[5] + relativeorigin[2] * m[ 6] + m[ 7];
        loadmodel->surfmesh.data_vertex3f[j*3+2] = relativeorigin[0] * m[8] + relativeorigin[1] * m[9] + relativeorigin[2] * m[10] + m[11];
        // store the weight as the primary weight on this vertex
        loadmodel->surfmesh.blends[j] = boneindex;
        loadmodel->surfmesh.data_skeletalindex4ub[j*4  ] = boneindex;
        loadmodel->surfmesh.data_skeletalindex4ub[j*4+1] = 0;
        loadmodel->surfmesh.data_skeletalindex4ub[j*4+2] = 0;
        loadmodel->surfmesh.data_skeletalindex4ub[j*4+3] = 0;
        loadmodel->surfmesh.data_skeletalweight4ub[j*4  ] = 255;
        loadmodel->surfmesh.data_skeletalweight4ub[j*4+1] = 0;
        loadmodel->surfmesh.data_skeletalweight4ub[j*4+2] = 0;
        loadmodel->surfmesh.data_skeletalweight4ub[j*4+3] = 0;
    }
    Z_Free(bonepose);
    // normals and tangents are calculated after elements are loaded
 
    //zymlump_t lump_texcoords; // float texcoords[numvertices][2];
    outtexcoord2f = loadmodel->surfmesh.data_texcoordtexture2f;
    intexcoord2f = (float *) (pheader->lump_texcoords.start + pbase);
    for (i = 0;i < pheader->numverts;i++)
    {
        outtexcoord2f[i*2+0] = BigFloat(intexcoord2f[i*2+0]);
        // flip T coordinate for OpenGL
        outtexcoord2f[i*2+1] = 1 - BigFloat(intexcoord2f[i*2+1]);
    }
 
    //zymlump_t lump_trizone; // byte trizone[numtris]; // see trizone explanation
    //loadmodel->alias.zymdata_trizone = Mem_Alloc(loadmodel->mempool, pheader->numtris);
    //memcpy(loadmodel->alias.zymdata_trizone, (void *) (pheader->lump_trizone.start + pbase), pheader->numtris);
 
    //zymlump_t lump_shaders; // char shadername[numshaders][32]; // shaders used on this model
    //zymlump_t lump_render; // int renderlist[rendersize]; // sorted by shader with run lengths (int count), shaders are sequentially used, each run can be used with glDrawElements (each triangle is 3 int indices)
    // byteswap, validate, and swap winding order of tris
    count = pheader->numshaders * sizeof(int) + pheader->numtris * sizeof(int[3]);
    if (pheader->lump_render.length != count)
        Host_Error("%s renderlist is wrong size (%i bytes, should be %i bytes)", loadmodel->name, pheader->lump_render.length, count);
    renderlist = (int *) (pheader->lump_render.start + pbase);
    renderlistend = (int *) ((unsigned char *) renderlist + pheader->lump_render.length);
    meshtriangles = 0;
    for (i = 0;i < loadmodel->num_surfaces;i++)
    {
        int firstvertex, lastvertex;
        if (renderlist >= renderlistend)
            Host_Error("%s corrupt renderlist (wrong size)", loadmodel->name);
        count = BigLong(*renderlist);renderlist++;
        if (renderlist + count * 3 > renderlistend || (i == pheader->numshaders - 1 && renderlist + count * 3 != renderlistend))
            Host_Error("%s corrupt renderlist (wrong size)", loadmodel->name);
 
        loadmodel->modelsurfaces_sorted[i] = i;
        surface = loadmodel->data_surfaces + i;
        surface->texture = loadmodel->data_textures + i;
        surface->num_firsttriangle = meshtriangles;
        surface->num_triangles = count;
        meshtriangles += surface->num_triangles;
 
        // load the elements
        outelements = loadmodel->surfmesh.data_element3i + surface->num_firsttriangle * 3;
        for (j = 0;j < surface->num_triangles;j++, renderlist += 3)
        {
            outelements[j*3+2] = BigLong(renderlist[0]);
            outelements[j*3+1] = BigLong(renderlist[1]);
            outelements[j*3+0] = BigLong(renderlist[2]);
        }
        // validate the elements and find the used vertex range
        firstvertex = meshvertices;
        lastvertex = 0;
        for (j = 0;j < surface->num_triangles * 3;j++)
        {
            if ((unsigned int)outelements[j] >= (unsigned int)meshvertices)
                Host_Error("%s corrupt renderlist (out of bounds index)", loadmodel->name);
            firstvertex = min(firstvertex, outelements[j]);
            lastvertex = max(lastvertex, outelements[j]);
        }
        surface->num_firstvertex = firstvertex;
        surface->num_vertices = lastvertex + 1 - firstvertex;
 
        // since zym models do not have named sections, reuse their shader
        // name as the section name
        shadername = (char *) (pheader->lump_shaders.start + pbase) + i * 32;
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + i, skinfiles, shadername, shadername);
    }
    Mod_FreeSkinFiles(skinfiles);
    Mem_Free(vertbonecounts);
    Mem_Free(verts);
    Mod_MakeSortedSurfaces(loadmodel);
 
    // compute all the mesh information that was not loaded from the file
    if (loadmodel->surfmesh.data_element3s)
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
            loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
    Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
    Mod_BuildBaseBonePoses();
    Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
    Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
void Mod_DARKPLACESMODEL_Load(model_t *mod, void *buffer, void *bufferend)
{
    dpmheader_t *pheader;
    dpmframe_t *frames;
    dpmbone_t *bone;
    dpmmesh_t *dpmmesh;
    unsigned char *pbase;
    int i, j, k, meshvertices, meshtriangles;
    skinfile_t *skinfiles;
    unsigned char *data;
    float *bonepose;
    float biggestorigin, tempvec[3], modelscale;
    float f;
    float *poses;
 
    pheader = (dpmheader_t *)buffer;
    pbase = (unsigned char *)buffer;
    if (memcmp(pheader->id, "DARKPLACESMODEL\0", 16))
        Host_Error ("Mod_DARKPLACESMODEL_Load: %s is not a darkplaces model", loadmodel->name);
    if (BigLong(pheader->type) != 2)
        Host_Error ("Mod_DARKPLACESMODEL_Load: only type 2 (hierarchical skeletal pose) models are currently supported (name = %s)", loadmodel->name);
 
    loadmodel->modeldatatypestring = "DPM";
 
    loadmodel->type = mod_alias;
    loadmodel->synctype = ST_RAND;
 
    // byteswap header
    pheader->type = BigLong(pheader->type);
    pheader->filesize = BigLong(pheader->filesize);
    pheader->mins[0] = BigFloat(pheader->mins[0]);
    pheader->mins[1] = BigFloat(pheader->mins[1]);
    pheader->mins[2] = BigFloat(pheader->mins[2]);
    pheader->maxs[0] = BigFloat(pheader->maxs[0]);
    pheader->maxs[1] = BigFloat(pheader->maxs[1]);
    pheader->maxs[2] = BigFloat(pheader->maxs[2]);
    pheader->yawradius = BigFloat(pheader->yawradius);
    pheader->allradius = BigFloat(pheader->allradius);
    pheader->num_bones = BigLong(pheader->num_bones);
    pheader->num_meshs = BigLong(pheader->num_meshs);
    pheader->num_frames = BigLong(pheader->num_frames);
    pheader->ofs_bones = BigLong(pheader->ofs_bones);
    pheader->ofs_meshs = BigLong(pheader->ofs_meshs);
    pheader->ofs_frames = BigLong(pheader->ofs_frames);
 
    if (pheader->num_bones < 1 || pheader->num_meshs < 1)
    {
        Con_Printf("%s has no geometry\n", loadmodel->name);
        return;
    }
    if (pheader->num_frames < 1)
    {
        Con_Printf("%s has no frames\n", loadmodel->name);
        return;
    }
 
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_Skeletal_AnimateVertices;
 
    // model bbox
    // LadyHavoc: actually we blow this away later with Mod_Alias_CalculateBoundingBox()
    for (i = 0;i < 3;i++)
    {
        loadmodel->normalmins[i] = pheader->mins[i];
        loadmodel->normalmaxs[i] = pheader->maxs[i];
        loadmodel->yawmins[i] = i != 2 ? -pheader->yawradius : pheader->mins[i];
        loadmodel->yawmaxs[i] = i != 2 ? pheader->yawradius : pheader->maxs[i];
        loadmodel->rotatedmins[i] = -pheader->allradius;
        loadmodel->rotatedmaxs[i] = pheader->allradius;
    }
    loadmodel->radius = pheader->allradius;
    loadmodel->radius2 = pheader->allradius * pheader->allradius;
 
    // load external .skin files if present
    skinfiles = Mod_LoadSkinFiles();
    if (loadmodel->numskins < 1)
        loadmodel->numskins = 1;
 
    meshvertices = 0;
    meshtriangles = 0;
 
    // gather combined statistics from the meshes
    dpmmesh = (dpmmesh_t *) (pbase + pheader->ofs_meshs);
    for (i = 0;i < (int)pheader->num_meshs;i++)
    {
        int numverts = BigLong(dpmmesh->num_verts);
        meshvertices += numverts;
        meshtriangles += BigLong(dpmmesh->num_tris);
        dpmmesh++;
    }
 
    loadmodel->numframes = pheader->num_frames;
    loadmodel->num_bones = pheader->num_bones;
    loadmodel->num_poses = loadmodel->numframes;
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces = pheader->num_meshs;
    loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
    loadmodel->num_texturesperskin = loadmodel->num_surfaces;
    loadmodel->surfmesh.num_vertices = meshvertices;
    loadmodel->surfmesh.num_triangles = meshtriangles;
    loadmodel->surfmesh.num_blends = 0;
 
    // do most allocations as one merged chunk
    // This is only robust for C standard types!
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool,
        loadmodel->num_surfaces * sizeof(int)
        + meshtriangles * sizeof(int[3])
        + (meshvertices <= 65536 ? meshtriangles * sizeof(unsigned short[3]) : 0)
        + meshvertices * (sizeof(float[14]) + sizeof(unsigned short) + sizeof(unsigned char[2][4]))
        + loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7])
        + loadmodel->num_bones * sizeof(float[12]));
    // Pointers must be taken in descending order of alignment requirement!
    loadmodel->surfmesh.data_vertex3f                  = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_svector3f                 = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_tvector3f                 = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_normal3f                  = (float *)data; data += meshvertices * sizeof(float[3]);
    loadmodel->surfmesh.data_texcoordtexture2f         = (float *)data; data += meshvertices * sizeof(float[2]);
    loadmodel->data_baseboneposeinverse                = (float *)data; data += loadmodel->num_bones * sizeof(float[12]);
    loadmodel->modelsurfaces_sorted                      = (int *)data; data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->surfmesh.data_element3i                   = (int *)data; data += meshtriangles * sizeof(int[3]);
    loadmodel->surfmesh.blends                = (unsigned short *)data; data += meshvertices * sizeof(unsigned short);
    if (meshvertices <= 65536)
    {
        loadmodel->surfmesh.data_element3s = (unsigned short *)data; data += meshtriangles * sizeof(unsigned short[3]);
    }
    loadmodel->data_poses7s                            = (short *)data; data += loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7]);
    loadmodel->surfmesh.data_skeletalindex4ub  = (unsigned char *)data; data += meshvertices * sizeof(unsigned char[4]);
    loadmodel->surfmesh.data_skeletalweight4ub = (unsigned char *)data; data += meshvertices * sizeof(unsigned char[4]);
    // Struct alignment requirements could change so we can't assume them here
    // otherwise a safe-looking commit could introduce undefined behaviour!
    loadmodel->data_surfaces = Mem_AllocType(loadmodel->mempool, msurface_t, loadmodel->num_surfaces * sizeof(msurface_t));
    loadmodel->data_textures = Mem_AllocType(loadmodel->mempool, texture_t, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
    loadmodel->skinscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numskins * sizeof(animscene_t));
    loadmodel->data_bones = Mem_AllocType(loadmodel->mempool, aliasbone_t, loadmodel->num_bones * sizeof(aliasbone_t));
    loadmodel->animscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numframes * sizeof(animscene_t));
    loadmodel->surfmesh.data_blendweights = Mem_AllocType(loadmodel->mempool, blendweights_t, meshvertices * sizeof(blendweights_t));
 
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // load the bone info
    bone = (dpmbone_t *) (pbase + pheader->ofs_bones);
    for (i = 0;i < loadmodel->num_bones;i++)
    {
        memcpy(loadmodel->data_bones[i].name, bone[i].name, sizeof(bone[i].name));
        loadmodel->data_bones[i].flags = BigLong(bone[i].flags);
        loadmodel->data_bones[i].parent = BigLong(bone[i].parent);
        if (loadmodel->data_bones[i].parent >= i)
            Host_Error("%s bone[%i].parent >= %i", loadmodel->name, i, i);
    }
 
    // load the frames
    frames = (dpmframe_t *) (pbase + pheader->ofs_frames);
    // figure out scale of model from root bone, for compatibility with old dpmodel versions
    poses = (float *) (pbase + BigLong(frames[0].ofs_bonepositions));
    tempvec[0] = BigFloat(poses[0]);
    tempvec[1] = BigFloat(poses[1]);
    tempvec[2] = BigFloat(poses[2]);
    modelscale = VectorLength(tempvec);
    biggestorigin = 0;
    for (i = 0;i < loadmodel->numframes;i++)
    {
        memcpy(loadmodel->animscenes[i].name, frames[i].name, sizeof(frames[i].name));
        loadmodel->animscenes[i].firstframe = i;
        loadmodel->animscenes[i].framecount = 1;
        loadmodel->animscenes[i].loop = true;
        loadmodel->animscenes[i].framerate = 10;
        // load the bone poses for this frame
        poses = (float *) (pbase + BigLong(frames[i].ofs_bonepositions));
        for (j = 0;j < loadmodel->num_bones*12;j++)
        {
            f = fabs(BigFloat(poses[j]));
            biggestorigin = max(biggestorigin, f);
        }
        // stuff not processed here: mins, maxs, yawradius, allradius
    }
    loadmodel->num_posescale = biggestorigin / 32767.0f;
    loadmodel->num_poseinvscale = 1.0f / loadmodel->num_posescale;
    for (i = 0;i < loadmodel->numframes;i++)
    {
        const float *frameposes = (float *) (pbase + BigLong(frames[i].ofs_bonepositions));
        for (j = 0;j < loadmodel->num_bones;j++)
        {
            float pose[12];
            matrix4x4_t posematrix;
            for (k = 0;k < 12;k++)
                pose[k] = BigFloat(frameposes[j*12+k]);
            // scale child bones to match the root scale
            if (loadmodel->data_bones[j].parent >= 0)
            {
                pose[3] *= modelscale;
                pose[7] *= modelscale;
                pose[11] *= modelscale;
            }
            // normalize rotation matrix
            VectorNormalize(pose + 0);
            VectorNormalize(pose + 4);
            VectorNormalize(pose + 8);
            Matrix4x4_FromArray12FloatD3D(&posematrix, pose);
            Matrix4x4_ToBonePose7s(&posematrix, loadmodel->num_poseinvscale, loadmodel->data_poses7s + 7*(i*loadmodel->num_bones+j));
        }
    }
 
    // load the meshes now
    dpmmesh = (dpmmesh_t *) (pbase + pheader->ofs_meshs);
    meshvertices = 0;
    meshtriangles = 0;
    // reconstruct frame 0 matrices to allow reconstruction of the base mesh
    // (converting from weight-blending skeletal animation to
    //  deformation-based skeletal animation)
    poses = (float *) (pbase + BigLong(frames[0].ofs_bonepositions));
    bonepose = (float *)Z_Malloc(loadmodel->num_bones * sizeof(float[12]));
    for (i = 0;i < loadmodel->num_bones;i++)
    {
        float m[12];
        for (k = 0;k < 12;k++)
            m[k] = BigFloat(poses[i*12+k]);
        if (loadmodel->data_bones[i].parent >= 0)
            R_ConcatTransforms(bonepose + 12 * loadmodel->data_bones[i].parent, m, bonepose + 12 * i);
        else
            for (k = 0;k < 12;k++)
                bonepose[12*i+k] = m[k];
    }
    for (i = 0;i < loadmodel->num_surfaces;i++, dpmmesh++)
    {
        const int *inelements;
        int *outelement3i;
        unsigned short *outelement3s;
        const float *intexcoord;
        msurface_t *surface;
 
        loadmodel->modelsurfaces_sorted[i] = i;
        surface = loadmodel->data_surfaces + i;
        surface->texture = loadmodel->data_textures + i;
        surface->num_firsttriangle = meshtriangles;
        surface->num_triangles = BigLong(dpmmesh->num_tris);
        surface->num_firstvertex = meshvertices;
        surface->num_vertices = BigLong(dpmmesh->num_verts);
        meshvertices += surface->num_vertices;
        meshtriangles += surface->num_triangles;
 
        inelements = (int *) (pbase + BigLong(dpmmesh->ofs_indices));
        outelement3i = loadmodel->surfmesh.data_element3i + surface->num_firsttriangle * 3;
        outelement3s = loadmodel->surfmesh.data_element3s ? loadmodel->surfmesh.data_element3s + surface->num_firsttriangle * 3 : NULL;
        for (j = 0;j < surface->num_triangles;j++)
        {
            // swap element order to flip triangles, because Quake uses clockwise (rare) and dpm uses counterclockwise (standard)
            outelement3i[j * 3 + 0] = surface->num_firstvertex + BigLong(inelements[j * 3 + 2]);
            outelement3i[j * 3 + 1] = surface->num_firstvertex + BigLong(inelements[j * 3 + 1]);
            outelement3i[j * 3 + 2] = surface->num_firstvertex + BigLong(inelements[j * 3 + 0]);
            if (outelement3s)
            {
                outelement3s[j * 3 + 0] = outelement3i[j * 3 + 0];
                outelement3s[j * 3 + 1] = outelement3i[j * 3 + 1];
                outelement3s[j * 3 + 2] = outelement3i[j * 3 + 2];
            }
        }
 
        intexcoord = (float *) (pbase + BigLong(dpmmesh->ofs_texcoords));
        for (j = 0;j < surface->num_vertices*2;j++)
            loadmodel->surfmesh.data_texcoordtexture2f[j + surface->num_firstvertex * 2] = BigFloat(intexcoord[j]);
 
        data = (unsigned char *) (pbase + BigLong(dpmmesh->ofs_verts));
        for (j = surface->num_firstvertex;j < surface->num_firstvertex + surface->num_vertices;j++)
        {
            int weightindex[4] = { 0, 0, 0, 0 };
            float weightinfluence[4] = { 0, 0, 0, 0 };
            int l;
            int numweights = BigLong(((dpmvertex_t *)data)->numbones);
            data += sizeof(dpmvertex_t);
            for (k = 0;k < numweights;k++)
            {
                const dpmbonevert_t *vert = (dpmbonevert_t *) data;
                int boneindex = BigLong(vert->bonenum);
                const float *m = bonepose + 12 * boneindex;
                float influence = BigFloat(vert->influence);
                float relativeorigin[3], relativenormal[3];
                relativeorigin[0] = BigFloat(vert->origin[0]);
                relativeorigin[1] = BigFloat(vert->origin[1]);
                relativeorigin[2] = BigFloat(vert->origin[2]);
                relativenormal[0] = BigFloat(vert->normal[0]);
                relativenormal[1] = BigFloat(vert->normal[1]);
                relativenormal[2] = BigFloat(vert->normal[2]);
                // blend the vertex bone weights into the base mesh
                loadmodel->surfmesh.data_vertex3f[j*3+0] += relativeorigin[0] * m[0] + relativeorigin[1] * m[1] + relativeorigin[2] * m[ 2] + influence * m[ 3];
                loadmodel->surfmesh.data_vertex3f[j*3+1] += relativeorigin[0] * m[4] + relativeorigin[1] * m[5] + relativeorigin[2] * m[ 6] + influence * m[ 7];
                loadmodel->surfmesh.data_vertex3f[j*3+2] += relativeorigin[0] * m[8] + relativeorigin[1] * m[9] + relativeorigin[2] * m[10] + influence * m[11];
                loadmodel->surfmesh.data_normal3f[j*3+0] += relativenormal[0] * m[0] + relativenormal[1] * m[1] + relativenormal[2] * m[ 2];
                loadmodel->surfmesh.data_normal3f[j*3+1] += relativenormal[0] * m[4] + relativenormal[1] * m[5] + relativenormal[2] * m[ 6];
                loadmodel->surfmesh.data_normal3f[j*3+2] += relativenormal[0] * m[8] + relativenormal[1] * m[9] + relativenormal[2] * m[10];
                if (!k)
                {
                    // store the first (and often only) weight
                    weightinfluence[0] = influence;
                    weightindex[0] = boneindex;
                }
                else
                {
                    // sort the new weight into this vertex's weight table
                    // (which only accepts up to 4 bones per vertex)
                    for (l = 0;l < 4;l++)
                    {
                        if (weightinfluence[l] < influence)
                        {
                            // move weaker influence weights out of the way first
                            int l2;
                            for (l2 = 3;l2 > l;l2--)
                            {
                                weightinfluence[l2] = weightinfluence[l2-1];
                                weightindex[l2] = weightindex[l2-1];
                            }
                            // store the new weight
                            weightinfluence[l] = influence;
                            weightindex[l] = boneindex;
                            break;
                        }
                    }
                }
                data += sizeof(dpmbonevert_t);
            }
            loadmodel->surfmesh.blends[j] = Mod_Skeletal_CompressBlend(loadmodel, weightindex, weightinfluence);
            loadmodel->surfmesh.data_skeletalindex4ub[j*4  ] = weightindex[0];
            loadmodel->surfmesh.data_skeletalindex4ub[j*4+1] = weightindex[1];
            loadmodel->surfmesh.data_skeletalindex4ub[j*4+2] = weightindex[2];
            loadmodel->surfmesh.data_skeletalindex4ub[j*4+3] = weightindex[3];
            loadmodel->surfmesh.data_skeletalweight4ub[j*4  ] = (unsigned char)(weightinfluence[0]*255.0f);
            loadmodel->surfmesh.data_skeletalweight4ub[j*4+1] = (unsigned char)(weightinfluence[1]*255.0f);
            loadmodel->surfmesh.data_skeletalweight4ub[j*4+2] = (unsigned char)(weightinfluence[2]*255.0f);
            loadmodel->surfmesh.data_skeletalweight4ub[j*4+3] = (unsigned char)(weightinfluence[3]*255.0f);
        }
 
        // since dpm models do not have named sections, reuse their shader name as the section name
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + i, skinfiles, dpmmesh->shadername, dpmmesh->shadername);
 
        Mod_ValidateElements(loadmodel->surfmesh.data_element3i + surface->num_firsttriangle * 3, loadmodel->surfmesh.data_element3s + surface->num_firsttriangle * 3, surface->num_triangles, surface->num_firstvertex, surface->num_vertices, __FILE__, __LINE__);
    }
    if (loadmodel->surfmesh.num_blends < meshvertices)
        loadmodel->surfmesh.data_blendweights = Mem_ReallocType(loadmodel->mempool, loadmodel->surfmesh.data_blendweights, blendweights_t, loadmodel->surfmesh.num_blends * sizeof(blendweights_t));
    Z_Free(bonepose);
    Mod_FreeSkinFiles(skinfiles);
    Mod_MakeSortedSurfaces(loadmodel);
 
    // compute all the mesh information that was not loaded from the file
    Mod_BuildBaseBonePoses();
    Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
// no idea why PSK/PSA files contain weird quaternions but they do...
#define PSKQUATNEGATIONS
void Mod_PSKMODEL_Load(model_t *mod, void *buffer, void *bufferend)
{
    int i, j, index, version, recordsize, numrecords, meshvertices, meshtriangles;
    int numpnts, numvtxw, numfaces, nummatts, numbones, numrawweights, numanimbones, numanims, numanimkeys;
    fs_offset_t filesize;
    pskpnts_t *pnts;
    pskvtxw_t *vtxw;
    pskface_t *faces;
    pskmatt_t *matts;
    pskboneinfo_t *bones;
    pskrawweights_t *rawweights;
    //pskboneinfo_t *animbones;
    pskaniminfo_t *anims;
    pskanimkeys_t *animkeys;
    void *animfilebuffer, *animbuffer, *animbufferend;
    unsigned char *data;
    pskchunk_t *pchunk;
    skinfile_t *skinfiles;
    char animname[MAX_QPATH];
    float biggestorigin;
 
    pchunk = (pskchunk_t *)buffer;
    if (strcmp(pchunk->id, "ACTRHEAD"))
        Host_Error ("Mod_PSKMODEL_Load: %s is not an Unreal Engine ActorX (.psk + .psa) model", loadmodel->name);
 
    loadmodel->modeldatatypestring = "PSK";
 
    loadmodel->type = mod_alias;
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_Skeletal_AnimateVertices;
    loadmodel->synctype = ST_RAND;
 
    FS_StripExtension(loadmodel->name, animname, sizeof(animname));
    dp_strlcat(animname, ".psa", sizeof(animname));
    animbuffer = animfilebuffer = FS_LoadFile(animname, loadmodel->mempool, false, &filesize);
    animbufferend = (void *)((unsigned char*)animbuffer + (int)filesize);
    if (!animbuffer)
        animbufferend = animbuffer;
 
    numpnts = 0;
    pnts = NULL;
    numvtxw = 0;
    vtxw = NULL;
    numfaces = 0;
    faces = NULL;
    nummatts = 0;
    matts = NULL;
    numbones = 0;
    bones = NULL;
    numrawweights = 0;
    rawweights = NULL;
    numanims = 0;
    anims = NULL;
    numanimkeys = 0;
    animkeys = NULL;
 
    while (buffer < bufferend)
    {
        pchunk = (pskchunk_t *)buffer;
        buffer = (void *)((unsigned char *)buffer + sizeof(pskchunk_t));
        version = LittleLong(pchunk->version);
        recordsize = LittleLong(pchunk->recordsize);
        numrecords = LittleLong(pchunk->numrecords);
        if (developer_extra.integer)
            Con_DPrintf("%s: %s %x: %i * %i = %i\n", loadmodel->name, pchunk->id, version, recordsize, numrecords, recordsize * numrecords);
        if (version != 0x1e83b9 && version != 0x1e9179 && version != 0x2e && version != 0x12f2bc && version != 0x12f2f0)
            Con_Printf ("%s: chunk %s has unknown version %x (0x1e83b9, 0x1e9179, 0x2e, 0x12f2bc, 0x12f2f0 are currently supported), trying to load anyway!\n", loadmodel->name, pchunk->id, version);
        if (!strcmp(pchunk->id, "ACTRHEAD"))
        {
            // nothing to do
        }
        else if (!strcmp(pchunk->id, "PNTS0000"))
        {
            pskpnts_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            numpnts = numrecords;
            pnts = (pskpnts_t *)buffer;
            for (index = 0, p = (pskpnts_t *)buffer;index < numrecords;index++, p++)
            {
                p->origin[0] = LittleFloat(p->origin[0]);
                p->origin[1] = LittleFloat(p->origin[1]);
                p->origin[2] = LittleFloat(p->origin[2]);
            }
            buffer = p;
        }
        else if (!strcmp(pchunk->id, "VTXW0000"))
        {
            pskvtxw_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            numvtxw = numrecords;
            vtxw = (pskvtxw_t *)buffer;
            for (index = 0, p = (pskvtxw_t *)buffer;index < numrecords;index++, p++)
            {
                p->pntsindex = LittleShort(p->pntsindex);
                p->texcoord[0] = LittleFloat(p->texcoord[0]);
                p->texcoord[1] = LittleFloat(p->texcoord[1]);
                if (p->pntsindex >= numpnts)
                {
                    Con_Printf("%s: vtxw->pntsindex %i >= numpnts %i\n", loadmodel->name, p->pntsindex, numpnts);
                    p->pntsindex = 0;
                }
            }
            buffer = p;
        }
        else if (!strcmp(pchunk->id, "FACE0000"))
        {
            pskface_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            numfaces = numrecords;
            faces = (pskface_t *)buffer;
            for (index = 0, p = (pskface_t *)buffer;index < numrecords;index++, p++)
            {
                p->vtxwindex[0] = LittleShort(p->vtxwindex[0]);
                p->vtxwindex[1] = LittleShort(p->vtxwindex[1]);
                p->vtxwindex[2] = LittleShort(p->vtxwindex[2]);
                p->group = LittleLong(p->group);
                if (p->vtxwindex[0] >= numvtxw)
                {
                    Con_Printf("%s: face->vtxwindex[0] %i >= numvtxw %i\n", loadmodel->name, p->vtxwindex[0], numvtxw);
                    p->vtxwindex[0] = 0;
                }
                if (p->vtxwindex[1] >= numvtxw)
                {
                    Con_Printf("%s: face->vtxwindex[1] %i >= numvtxw %i\n", loadmodel->name, p->vtxwindex[1], numvtxw);
                    p->vtxwindex[1] = 0;
                }
                if (p->vtxwindex[2] >= numvtxw)
                {
                    Con_Printf("%s: face->vtxwindex[2] %i >= numvtxw %i\n", loadmodel->name, p->vtxwindex[2], numvtxw);
                    p->vtxwindex[2] = 0;
                }
            }
            buffer = p;
        }
        else if (!strcmp(pchunk->id, "MATT0000"))
        {
            pskmatt_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            nummatts = numrecords;
            matts = (pskmatt_t *)buffer;
            for (index = 0, p = (pskmatt_t *)buffer;index < numrecords;index++, p++)
            {
                // nothing to do
            }
            buffer = p;
        }
        else if (!strcmp(pchunk->id, "REFSKELT"))
        {
            pskboneinfo_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            numbones = numrecords;
            bones = (pskboneinfo_t *)buffer;
            for (index = 0, p = (pskboneinfo_t *)buffer;index < numrecords;index++, p++)
            {
                p->numchildren = LittleLong(p->numchildren);
                p->parent = LittleLong(p->parent);
                p->basepose.quat[0] = LittleFloat(p->basepose.quat[0]);
                p->basepose.quat[1] = LittleFloat(p->basepose.quat[1]);
                p->basepose.quat[2] = LittleFloat(p->basepose.quat[2]);
                p->basepose.quat[3] = LittleFloat(p->basepose.quat[3]);
                p->basepose.origin[0] = LittleFloat(p->basepose.origin[0]);
                p->basepose.origin[1] = LittleFloat(p->basepose.origin[1]);
                p->basepose.origin[2] = LittleFloat(p->basepose.origin[2]);
                p->basepose.unknown = LittleFloat(p->basepose.unknown);
                p->basepose.size[0] = LittleFloat(p->basepose.size[0]);
                p->basepose.size[1] = LittleFloat(p->basepose.size[1]);
                p->basepose.size[2] = LittleFloat(p->basepose.size[2]);
#ifdef PSKQUATNEGATIONS
                if (index)
                {
                    p->basepose.quat[0] *= -1;
                    p->basepose.quat[1] *= -1;
                    p->basepose.quat[2] *= -1;
                }
                else
                {
                    p->basepose.quat[0] *=  1;
                    p->basepose.quat[1] *= -1;
                    p->basepose.quat[2] *=  1;
                }
#endif
                if (p->parent < 0 || p->parent >= numbones)
                {
                    Con_Printf("%s: bone->parent %i >= numbones %i\n", loadmodel->name, p->parent, numbones);
                    p->parent = 0;
                }
            }
            buffer = p;
        }
        else if (!strcmp(pchunk->id, "RAWWEIGHTS"))
        {
            pskrawweights_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", loadmodel->name, pchunk->id);
            // byteswap in place and keep the pointer
            numrawweights = numrecords;
            rawweights = (pskrawweights_t *)buffer;
            for (index = 0, p = (pskrawweights_t *)buffer;index < numrecords;index++, p++)
            {
                p->weight = LittleFloat(p->weight);
                p->pntsindex = LittleLong(p->pntsindex);
                p->boneindex = LittleLong(p->boneindex);
                if (p->pntsindex < 0 || p->pntsindex >= numpnts)
                {
                    Con_Printf("%s: weight->pntsindex %i >= numpnts %i\n", loadmodel->name, p->pntsindex, numpnts);
                    p->pntsindex = 0;
                }
                if (p->boneindex < 0 || p->boneindex >= numbones)
                {
                    Con_Printf("%s: weight->boneindex %i >= numbones %i\n", loadmodel->name, p->boneindex, numbones);
                    p->boneindex = 0;
                }
            }
            buffer = p;
        }
    }
 
    while (animbuffer < animbufferend)
    {
        pchunk = (pskchunk_t *)animbuffer;
        animbuffer = (void *)((unsigned char *)animbuffer + sizeof(pskchunk_t));
        version = LittleLong(pchunk->version);
        recordsize = LittleLong(pchunk->recordsize);
        numrecords = LittleLong(pchunk->numrecords);
        if (developer_extra.integer)
            Con_DPrintf("%s: %s %x: %i * %i = %i\n", animname, pchunk->id, version, recordsize, numrecords, recordsize * numrecords);
        if (version != 0x1e83b9 && version != 0x1e9179 && version != 0x2e && version != 0x12f2bc && version != 0x12f2f0)
            Con_Printf ("%s: chunk %s has unknown version %x (0x1e83b9, 0x1e9179, 0x2e, 0x12f2bc, 0x12f2f0 are currently supported), trying to load anyway!\n", animname, pchunk->id, version);
        if (!strcmp(pchunk->id, "ANIMHEAD"))
        {
            // nothing to do
        }
        else if (!strcmp(pchunk->id, "BONENAMES"))
        {
            pskboneinfo_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", animname, pchunk->id);
            // byteswap in place and keep the pointer
            numanimbones = numrecords;
            //animbones = (pskboneinfo_t *)animbuffer;
            // NOTE: supposedly psa does not need to match the psk model, the
            // bones missing from the psa would simply use their base
            // positions from the psk, but this is hard for me to implement
            // and people can easily make animations that match.
            if (numanimbones != numbones)
                Host_Error("%s: this loader only supports animations with the same bones as the mesh", loadmodel->name);
            for (index = 0, p = (pskboneinfo_t *)animbuffer;index < numrecords;index++, p++)
            {
                p->numchildren = LittleLong(p->numchildren);
                p->parent = LittleLong(p->parent);
                p->basepose.quat[0] = LittleFloat(p->basepose.quat[0]);
                p->basepose.quat[1] = LittleFloat(p->basepose.quat[1]);
                p->basepose.quat[2] = LittleFloat(p->basepose.quat[2]);
                p->basepose.quat[3] = LittleFloat(p->basepose.quat[3]);
                p->basepose.origin[0] = LittleFloat(p->basepose.origin[0]);
                p->basepose.origin[1] = LittleFloat(p->basepose.origin[1]);
                p->basepose.origin[2] = LittleFloat(p->basepose.origin[2]);
                p->basepose.unknown = LittleFloat(p->basepose.unknown);
                p->basepose.size[0] = LittleFloat(p->basepose.size[0]);
                p->basepose.size[1] = LittleFloat(p->basepose.size[1]);
                p->basepose.size[2] = LittleFloat(p->basepose.size[2]);
#ifdef PSKQUATNEGATIONS
                if (index)
                {
                    p->basepose.quat[0] *= -1;
                    p->basepose.quat[1] *= -1;
                    p->basepose.quat[2] *= -1;
                }
                else
                {
                    p->basepose.quat[0] *=  1;
                    p->basepose.quat[1] *= -1;
                    p->basepose.quat[2] *=  1;
                }
#endif
                if (p->parent < 0 || p->parent >= numanimbones)
                {
                    Con_Printf("%s: bone->parent %i >= numanimbones %i\n", animname, p->parent, numanimbones);
                    p->parent = 0;
                }
                // check that bones are the same as in the base
                if (strcmp(p->name, bones[index].name) || p->parent != bones[index].parent)
                    Host_Error("%s: this loader only supports animations with the same bones as the mesh", animname);
            }
            animbuffer = p;
        }
        else if (!strcmp(pchunk->id, "ANIMINFO"))
        {
            pskaniminfo_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", animname, pchunk->id);
            // byteswap in place and keep the pointer
            numanims = numrecords;
            anims = (pskaniminfo_t *)animbuffer;
            for (index = 0, p = (pskaniminfo_t *)animbuffer;index < numrecords;index++, p++)
            {
                p->numbones = LittleLong(p->numbones);
                p->playtime = LittleFloat(p->playtime);
                p->fps = LittleFloat(p->fps);
                p->firstframe = LittleLong(p->firstframe);
                p->numframes = LittleLong(p->numframes);
                if (p->numbones != numbones)
                    Con_Printf("%s: animinfo->numbones != numbones, trying to load anyway!\n", animname);
            }
            animbuffer = p;
        }
        else if (!strcmp(pchunk->id, "ANIMKEYS"))
        {
            pskanimkeys_t *p;
            if (recordsize != sizeof(*p))
                Host_Error("%s: %s has unsupported recordsize", animname, pchunk->id);
            numanimkeys = numrecords;
            animkeys = (pskanimkeys_t *)animbuffer;
            for (index = 0, p = (pskanimkeys_t *)animbuffer;index < numrecords;index++, p++)
            {
                p->origin[0] = LittleFloat(p->origin[0]);
                p->origin[1] = LittleFloat(p->origin[1]);
                p->origin[2] = LittleFloat(p->origin[2]);
                p->quat[0] = LittleFloat(p->quat[0]);
                p->quat[1] = LittleFloat(p->quat[1]);
                p->quat[2] = LittleFloat(p->quat[2]);
                p->quat[3] = LittleFloat(p->quat[3]);
                p->frametime = LittleFloat(p->frametime);
#ifdef PSKQUATNEGATIONS
                if (index % numbones)
                {
                    p->quat[0] *= -1;
                    p->quat[1] *= -1;
                    p->quat[2] *= -1;
                }
                else
                {
                    p->quat[0] *=  1;
                    p->quat[1] *= -1;
                    p->quat[2] *=  1;
                }
#endif
            }
            animbuffer = p;
            // TODO: allocate bonepose stuff
        }
        else
            Con_Printf("%s: unknown chunk ID \"%s\"\n", animname, pchunk->id);
    }
 
    if (!numpnts || !pnts || !numvtxw || !vtxw || !numfaces || !faces || !nummatts || !matts || !numbones || !bones || !numrawweights || !rawweights)
        Host_Error("%s: missing required chunks", loadmodel->name);
 
    if (numanims)
    {
        loadmodel->numframes = 0;
        for (index = 0;index < numanims;index++)
            loadmodel->numframes += anims[index].numframes;
        if (numanimkeys != numbones * loadmodel->numframes)
            Host_Error("%s: %s has incorrect number of animation keys", animname, pchunk->id);
    }
    else
        loadmodel->numframes = loadmodel->num_poses = 1;
 
    meshvertices = numvtxw;
    meshtriangles = numfaces;
 
    // load external .skin files if present
    skinfiles = Mod_LoadSkinFiles();
    if (loadmodel->numskins < 1)
        loadmodel->numskins = 1;
    loadmodel->num_bones = numbones;
    loadmodel->num_poses = loadmodel->numframes;
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces = nummatts;
    loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
    loadmodel->num_texturesperskin = loadmodel->num_surfaces;
    loadmodel->surfmesh.num_vertices = meshvertices;
    loadmodel->surfmesh.num_triangles = meshtriangles;
 
    // do most allocations as one merged chunk
    // This is only robust for C standard types!
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool,
        loadmodel->surfmesh.num_vertices * sizeof(float[3])
        + loadmodel->surfmesh.num_vertices * sizeof(float[3])
        + loadmodel->surfmesh.num_vertices * sizeof(float[3])
        + loadmodel->surfmesh.num_vertices * sizeof(float[3])
        + loadmodel->surfmesh.num_vertices * sizeof(float[2])
        + loadmodel->num_bones * sizeof(float[12])
        + loadmodel->num_surfaces * sizeof(int)
        + loadmodel->surfmesh.num_triangles * sizeof(int[3])
        + loadmodel->surfmesh.num_vertices * sizeof(unsigned short)
        + ((loadmodel->surfmesh.num_vertices <= 65536) ? (loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3])) : 0)
        + loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7])
        + loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4])
        + loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]));
    // Pointers must be taken in descending order of alignment requirement!
    loadmodel->surfmesh.data_vertex3f          = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_svector3f         = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_tvector3f         = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_normal3f          = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_texcoordtexture2f = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
    loadmodel->data_baseboneposeinverse        = (float *)data; data += loadmodel->num_bones * sizeof(float[12]);
    loadmodel->modelsurfaces_sorted              = (int *)data; data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->surfmesh.data_element3i           = (int *)data; data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
    loadmodel->surfmesh.num_blends = 0;
    loadmodel->surfmesh.blends        = (unsigned short *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned short);
    if (loadmodel->surfmesh.num_vertices <= 65536)
    {
        loadmodel->surfmesh.data_element3s = (unsigned short *)data;data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
    }
    loadmodel->data_poses7s                            = (short *)data; data += loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7]);
    loadmodel->surfmesh.data_skeletalindex4ub  = (unsigned char *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
    loadmodel->surfmesh.data_skeletalweight4ub = (unsigned char *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
    // Struct alignment requirements could change so we can't assume them here
    // otherwise a safe-looking commit could introduce undefined behaviour!
    loadmodel->data_surfaces = Mem_AllocType(loadmodel->mempool, msurface_t, loadmodel->num_surfaces * sizeof(msurface_t));
    loadmodel->data_textures = Mem_AllocType(loadmodel->mempool, texture_t, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
    loadmodel->skinscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numskins * sizeof(animscene_t));
    loadmodel->data_bones = Mem_AllocType(loadmodel->mempool, aliasbone_t, loadmodel->num_bones * sizeof(aliasbone_t));
    loadmodel->animscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numframes * sizeof(animscene_t));
    loadmodel->surfmesh.data_blendweights = Mem_AllocType(loadmodel->mempool, blendweights_t, loadmodel->surfmesh.num_vertices * sizeof(blendweights_t));
 
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // create surfaces
    for (index = 0, i = 0;index < nummatts;index++)
    {
        // since psk models do not have named sections, reuse their shader name as the section name
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + index, skinfiles, matts[index].name, matts[index].name);
        loadmodel->modelsurfaces_sorted[index] = index;
        loadmodel->data_surfaces[index].texture = loadmodel->data_textures + index;
        loadmodel->data_surfaces[index].num_firstvertex = 0;
        loadmodel->data_surfaces[index].num_vertices = loadmodel->surfmesh.num_vertices;
    }
 
    // copy over the vertex locations and texcoords
    for (index = 0;index < numvtxw;index++)
    {
        loadmodel->surfmesh.data_vertex3f[index*3+0] = pnts[vtxw[index].pntsindex].origin[0];
        loadmodel->surfmesh.data_vertex3f[index*3+1] = pnts[vtxw[index].pntsindex].origin[1];
        loadmodel->surfmesh.data_vertex3f[index*3+2] = pnts[vtxw[index].pntsindex].origin[2];
        loadmodel->surfmesh.data_texcoordtexture2f[index*2+0] = vtxw[index].texcoord[0];
        loadmodel->surfmesh.data_texcoordtexture2f[index*2+1] = vtxw[index].texcoord[1];
    }
 
    // loading the faces is complicated because we need to sort them into surfaces by mattindex
    for (index = 0;index < numfaces;index++)
        loadmodel->data_surfaces[faces[index].mattindex].num_triangles++;
    for (index = 0, i = 0;index < nummatts;index++)
    {
        loadmodel->data_surfaces[index].num_firsttriangle = i;
        i += loadmodel->data_surfaces[index].num_triangles;
        loadmodel->data_surfaces[index].num_triangles = 0;
    }
    for (index = 0;index < numfaces;index++)
    {
        i = (loadmodel->data_surfaces[faces[index].mattindex].num_firsttriangle + loadmodel->data_surfaces[faces[index].mattindex].num_triangles++)*3;
        loadmodel->surfmesh.data_element3i[i+0] = faces[index].vtxwindex[0];
        loadmodel->surfmesh.data_element3i[i+1] = faces[index].vtxwindex[1];
        loadmodel->surfmesh.data_element3i[i+2] = faces[index].vtxwindex[2];
    }
 
    // copy over the bones
    for (index = 0;index < numbones;index++)
    {
        dp_strlcpy(loadmodel->data_bones[index].name, bones[index].name, sizeof(loadmodel->data_bones[index].name));
        loadmodel->data_bones[index].parent = (index || bones[index].parent > 0) ? bones[index].parent : -1;
        if (loadmodel->data_bones[index].parent >= index)
            Host_Error("%s bone[%i].parent >= %i", loadmodel->name, index, index);
    }
 
    // convert the basepose data
    if (loadmodel->num_bones)
    {
        int boneindex;
        matrix4x4_t *basebonepose;
        float *outinvmatrix = loadmodel->data_baseboneposeinverse;
        matrix4x4_t bonematrix;
        matrix4x4_t tempbonematrix;
        basebonepose = (matrix4x4_t *)Mem_Alloc(tempmempool, loadmodel->num_bones * sizeof(matrix4x4_t));
        for (boneindex = 0;boneindex < loadmodel->num_bones;boneindex++)
        {
            Matrix4x4_FromOriginQuat(&bonematrix, bones[boneindex].basepose.origin[0], bones[boneindex].basepose.origin[1], bones[boneindex].basepose.origin[2], bones[boneindex].basepose.quat[0], bones[boneindex].basepose.quat[1], bones[boneindex].basepose.quat[2], bones[boneindex].basepose.quat[3]);
            if (loadmodel->data_bones[boneindex].parent >= 0)
            {
                tempbonematrix = bonematrix;
                Matrix4x4_Concat(&bonematrix, basebonepose + loadmodel->data_bones[boneindex].parent, &tempbonematrix);
            }
            basebonepose[boneindex] = bonematrix;
            Matrix4x4_Invert_Simple(&tempbonematrix, basebonepose + boneindex);
            Matrix4x4_ToArray12FloatD3D(&tempbonematrix, outinvmatrix + 12*boneindex);
        }
        Mem_Free(basebonepose);
    }
 
    // sort the psk point weights into the vertex weight tables
    // (which only accept up to 4 bones per vertex)
    for (index = 0;index < numvtxw;index++)
    {
        int weightindex[4] = { 0, 0, 0, 0 };
        float weightinfluence[4] = { 0, 0, 0, 0 };
        int l;
        for (j = 0;j < numrawweights;j++)
        {
            if (rawweights[j].pntsindex == vtxw[index].pntsindex)
            {
                int boneindex = rawweights[j].boneindex;
                float influence = rawweights[j].weight;
                for (l = 0;l < 4;l++)
                {
                    if (weightinfluence[l] < influence)
                    {
                        // move lower influence weights out of the way first
                        int l2;
                        for (l2 = 3;l2 > l;l2--)
                        {
                            weightinfluence[l2] = weightinfluence[l2-1];
                            weightindex[l2] = weightindex[l2-1];
                        }
                        // store the new weight
                        weightinfluence[l] = influence;
                        weightindex[l] = boneindex;
                        break;
                    }
                }
            }
        }
        loadmodel->surfmesh.blends[index] = Mod_Skeletal_CompressBlend(loadmodel, weightindex, weightinfluence);
        loadmodel->surfmesh.data_skeletalindex4ub[index*4  ] = weightindex[0];
        loadmodel->surfmesh.data_skeletalindex4ub[index*4+1] = weightindex[1];
        loadmodel->surfmesh.data_skeletalindex4ub[index*4+2] = weightindex[2];
        loadmodel->surfmesh.data_skeletalindex4ub[index*4+3] = weightindex[3];
        loadmodel->surfmesh.data_skeletalweight4ub[index*4  ] = (unsigned char)(weightinfluence[0]*255.0f);
        loadmodel->surfmesh.data_skeletalweight4ub[index*4+1] = (unsigned char)(weightinfluence[1]*255.0f);
        loadmodel->surfmesh.data_skeletalweight4ub[index*4+2] = (unsigned char)(weightinfluence[2]*255.0f);
        loadmodel->surfmesh.data_skeletalweight4ub[index*4+3] = (unsigned char)(weightinfluence[3]*255.0f);
    }
    if (loadmodel->surfmesh.num_blends < loadmodel->surfmesh.num_vertices)
        loadmodel->surfmesh.data_blendweights = Mem_ReallocType(loadmodel->mempool, loadmodel->surfmesh.data_blendweights, blendweights_t, loadmodel->surfmesh.num_blends * sizeof(blendweights_t));
 
    // set up the animscenes based on the anims
    if (numanims)
    {
        for (index = 0, i = 0;index < numanims;index++)
        {
            for (j = 0;j < anims[index].numframes;j++, i++)
            {
                dpsnprintf(loadmodel->animscenes[i].name, sizeof(loadmodel->animscenes[i].name), "%s_%d", anims[index].name, j);
                loadmodel->animscenes[i].firstframe = i;
                loadmodel->animscenes[i].framecount = 1;
                loadmodel->animscenes[i].loop = true;
                loadmodel->animscenes[i].framerate = anims[index].fps;
            }
        }
        // calculate the scaling value for bone origins so they can be compressed to short
        biggestorigin = 0;
        for (index = 0;index < numanimkeys;index++)
        {
            pskanimkeys_t *k = animkeys + index;
            biggestorigin = max(biggestorigin, fabs(k->origin[0]));
            biggestorigin = max(biggestorigin, fabs(k->origin[1]));
            biggestorigin = max(biggestorigin, fabs(k->origin[2]));
        }
        loadmodel->num_posescale = biggestorigin / 32767.0f;
        if (loadmodel->num_posescale == 0) // don't divide by zero
            loadmodel->num_posescale = 1.0;
        loadmodel->num_poseinvscale = 1.0f / loadmodel->num_posescale;
    
        // load the poses from the animkeys
        for (index = 0;index < numanimkeys;index++)
        {
            pskanimkeys_t *k = animkeys + index;
            float quat[4];
            Vector4Copy(k->quat, quat);
            if (quat[3] > 0)
                Vector4Negate(quat, quat);
            Vector4Normalize2(quat, quat);
            // compress poses to the short[7] format for longterm storage
            loadmodel->data_poses7s[index*7+0] = k->origin[0] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+1] = k->origin[1] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+2] = k->origin[2] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+3] = quat[0] * 32767.0f;
            loadmodel->data_poses7s[index*7+4] = quat[1] * 32767.0f;
            loadmodel->data_poses7s[index*7+5] = quat[2] * 32767.0f;
            loadmodel->data_poses7s[index*7+6] = quat[3] * 32767.0f;
        }
    }
    else
    {
        dp_strlcpy(loadmodel->animscenes[0].name, "base", sizeof(loadmodel->animscenes[0].name));
        loadmodel->animscenes[0].firstframe = 0;
        loadmodel->animscenes[0].framecount = 1;
        loadmodel->animscenes[0].loop = true;
        loadmodel->animscenes[0].framerate = 10;
 
        // calculate the scaling value for bone origins so they can be compressed to short
        biggestorigin = 0;
        for (index = 0;index < numbones;index++)
        {
            pskboneinfo_t *p = bones + index;
            biggestorigin = max(biggestorigin, fabs(p->basepose.origin[0]));
            biggestorigin = max(biggestorigin, fabs(p->basepose.origin[1]));
            biggestorigin = max(biggestorigin, fabs(p->basepose.origin[2]));
        }
        loadmodel->num_posescale = biggestorigin / 32767.0f;
        if (loadmodel->num_posescale == 0) // don't divide by zero
            loadmodel->num_posescale = 1.0;
        loadmodel->num_poseinvscale = 1.0f / loadmodel->num_posescale;
    
        // load the basepose as a frame
        for (index = 0;index < numbones;index++)
        {
            pskboneinfo_t *p = bones + index;
            float quat[4];
            Vector4Copy(p->basepose.quat, quat);
            if (quat[3] > 0)
                Vector4Negate(quat, quat);
            Vector4Normalize2(quat, quat);
            // compress poses to the short[7] format for longterm storage
            loadmodel->data_poses7s[index*7+0] = p->basepose.origin[0] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+1] = p->basepose.origin[1] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+2] = p->basepose.origin[2] * loadmodel->num_poseinvscale;
            loadmodel->data_poses7s[index*7+3] = quat[0] * 32767.0f;
            loadmodel->data_poses7s[index*7+4] = quat[1] * 32767.0f;
            loadmodel->data_poses7s[index*7+5] = quat[2] * 32767.0f;
            loadmodel->data_poses7s[index*7+6] = quat[3] * 32767.0f;
        }
    }
 
    Mod_FreeSkinFiles(skinfiles);
    if (animfilebuffer)
        Mem_Free(animfilebuffer);
    Mod_MakeSortedSurfaces(loadmodel);
 
    // compute all the mesh information that was not loaded from the file
    // TODO: honor smoothing groups somehow?
    if (loadmodel->surfmesh.data_element3s)
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
            loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
    Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, loadmodel->surfmesh.num_vertices, __FILE__, __LINE__);
    Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
    Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
    loadmodel->surfmesh.isanimated = Mod_Alias_CalculateBoundingBox();
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
}
 
void Mod_INTERQUAKEMODEL_Load(model_t *mod, void *buffer, void *bufferend)
{
    unsigned char *data;
    const char *text;
    const unsigned char *pbase, *pend;
    iqmheader_t header;
    skinfile_t *skinfiles;
    int i, j, k;
    float biggestorigin;
    const unsigned int *inelements;
    int *outelements;
    float *outvertex, *outnormal, *outtexcoord, *outsvector, *outtvector, *outcolor;
    // this pointers into the file data are read only through Little* functions so they can be unaligned memory
    const float *vnormal = NULL;
    const float *vposition = NULL;
    const float *vtangent = NULL;
    const float *vtexcoord = NULL;
    const float *vcolor4f = NULL;
    const unsigned char *vblendindexes = NULL;
    const unsigned char *vblendweights = NULL;
    const unsigned char *vcolor4ub = NULL;
    const unsigned short *framedata = NULL;
    // temporary memory allocations (because the data in the file may be misaligned)
    iqmanim_t *anims = NULL;
    iqmbounds_t *bounds = NULL;
    iqmjoint1_t *joint1 = NULL;
    iqmjoint_t *joint = NULL;
    iqmmesh_t *meshes = NULL;
    iqmpose1_t *pose1 = NULL;
    iqmpose_t *pose = NULL;
    iqmvertexarray_t *vas = NULL;
 
    pbase = (unsigned char *)buffer;
    pend = (unsigned char *)bufferend;
 
    if (pbase + sizeof(iqmheader_t) > pend)
        Host_Error ("Mod_INTERQUAKEMODEL_Load: %s is not an Inter-Quake Model %d", loadmodel->name, (int)(pend - pbase));
 
    // copy struct (otherwise it may be misaligned)
    // LadyHavoc: okay it's definitely not misaligned here, but for consistency...
    memcpy(&header, pbase, sizeof(iqmheader_t));
 
    if (memcmp(header.id, "INTERQUAKEMODEL", 16))
        Host_Error ("Mod_INTERQUAKEMODEL_Load: %s is not an Inter-Quake Model", loadmodel->name);
    if (LittleLong(header.version) != 1 && LittleLong(header.version) != 2)
        Host_Error ("Mod_INTERQUAKEMODEL_Load: only version 1 and 2 models are currently supported (name = %s)", loadmodel->name);
 
    loadmodel->modeldatatypestring = "IQM";
 
    loadmodel->type = mod_alias;
    loadmodel->synctype = ST_RAND;
 
    // byteswap header
    header.version = LittleLong(header.version);
    header.filesize = LittleLong(header.filesize);
    header.flags = LittleLong(header.flags);
    header.num_text = LittleLong(header.num_text);
    header.ofs_text = LittleLong(header.ofs_text);
    header.num_meshes = LittleLong(header.num_meshes);
    header.ofs_meshes = LittleLong(header.ofs_meshes);
    header.num_vertexarrays = LittleLong(header.num_vertexarrays);
    header.num_vertexes = LittleLong(header.num_vertexes);
    header.ofs_vertexarrays = LittleLong(header.ofs_vertexarrays);
    header.num_triangles = LittleLong(header.num_triangles);
    header.ofs_triangles = LittleLong(header.ofs_triangles);
    header.ofs_neighbors = LittleLong(header.ofs_neighbors);
    header.num_joints = LittleLong(header.num_joints);
    header.ofs_joints = LittleLong(header.ofs_joints);
    header.num_poses = LittleLong(header.num_poses);
    header.ofs_poses = LittleLong(header.ofs_poses);
    header.num_anims = LittleLong(header.num_anims);
    header.ofs_anims = LittleLong(header.ofs_anims);
    header.num_frames = LittleLong(header.num_frames);
    header.num_framechannels = LittleLong(header.num_framechannels);
    header.ofs_frames = LittleLong(header.ofs_frames);
    header.ofs_bounds = LittleLong(header.ofs_bounds);
    header.num_comment = LittleLong(header.num_comment);
    header.ofs_comment = LittleLong(header.ofs_comment);
    header.num_extensions = LittleLong(header.num_extensions);
    header.ofs_extensions = LittleLong(header.ofs_extensions);
 
    if (header.version == 1)
    {
        if (pbase + header.ofs_joints + header.num_joints*sizeof(iqmjoint1_t) > pend ||
            pbase + header.ofs_poses + header.num_poses*sizeof(iqmpose1_t) > pend)
        {
            Con_Printf("%s has invalid size or offset information\n", loadmodel->name);
            return;
        }
    }
    else
    {
        if (pbase + header.ofs_joints + header.num_joints*sizeof(iqmjoint_t) > pend ||
            pbase + header.ofs_poses + header.num_poses*sizeof(iqmpose_t) > pend)
        {
            Con_Printf("%s has invalid size or offset information\n", loadmodel->name);
            return;
        }
    }
    if (pbase + header.ofs_text + header.num_text > pend ||
        pbase + header.ofs_meshes + header.num_meshes*sizeof(iqmmesh_t) > pend ||
        pbase + header.ofs_vertexarrays + header.num_vertexarrays*sizeof(iqmvertexarray_t) > pend ||
        pbase + header.ofs_triangles + header.num_triangles*sizeof(int[3]) > pend ||
        (header.ofs_neighbors && pbase + header.ofs_neighbors + header.num_triangles*sizeof(int[3]) > pend) ||
        pbase + header.ofs_anims + header.num_anims*sizeof(iqmanim_t) > pend ||
        pbase + header.ofs_frames + header.num_frames*header.num_framechannels*sizeof(unsigned short) > pend ||
        (header.ofs_bounds && pbase + header.ofs_bounds + header.num_frames*sizeof(iqmbounds_t) > pend) ||
        pbase + header.ofs_comment + header.num_comment > pend)
    {
        Con_Printf("%s has invalid size or offset information\n", loadmodel->name);
        return;
    }
 
    // Structs will be copied for alignment in memory, otherwise we crash on Sparc, PowerPC and others
    // and get big spam from UBSan, because these offsets may not be aligned.
    if (header.num_vertexarrays)
        vas = (iqmvertexarray_t *)(pbase + header.ofs_vertexarrays);
    if (header.num_anims)
        anims = (iqmanim_t *)(pbase + header.ofs_anims);
    if (header.ofs_bounds)
        bounds = (iqmbounds_t *)(pbase + header.ofs_bounds);
    if (header.num_meshes)
        meshes = (iqmmesh_t *)(pbase + header.ofs_meshes);
 
    for (i = 0;i < (int)header.num_vertexarrays;i++)
    {
        iqmvertexarray_t va;
        size_t vsize;
 
        memcpy(&va, &vas[i], sizeof(iqmvertexarray_t));
        va.type = LittleLong(va.type);
        va.flags = LittleLong(va.flags);
        va.format = LittleLong(va.format);
        va.size = LittleLong(va.size);
        va.offset = LittleLong(va.offset);
        vsize = header.num_vertexes*va.size;
        switch (va.format)
        { 
        case IQM_FLOAT: vsize *= sizeof(float); break;
        case IQM_UBYTE: vsize *= sizeof(unsigned char); break;
        default: continue;
        }
        if (pbase + va.offset + vsize > pend)
            continue;
        // no need to copy the vertex data for alignment because LittleLong/LittleShort will be invoked on reading them, and the destination is aligned
        switch (va.type)
        {
        case IQM_POSITION:
            if (va.format == IQM_FLOAT && va.size == 3)
                vposition = (const float *)(pbase + va.offset);
            break;
        case IQM_TEXCOORD:
            if (va.format == IQM_FLOAT && va.size == 2)
                vtexcoord = (const float *)(pbase + va.offset);
            break;
        case IQM_NORMAL:
            if (va.format == IQM_FLOAT && va.size == 3)
                vnormal = (const float *)(pbase + va.offset);
            break;
        case IQM_TANGENT:
            if (va.format == IQM_FLOAT && va.size == 4)
                vtangent = (const float *)(pbase + va.offset);
            break;
        case IQM_BLENDINDEXES:
            if (va.format == IQM_UBYTE && va.size == 4)
                vblendindexes = (const unsigned char *)(pbase + va.offset);
            break;
        case IQM_BLENDWEIGHTS:
            if (va.format == IQM_UBYTE && va.size == 4)
                vblendweights = (const unsigned char *)(pbase + va.offset);
            break;
        case IQM_COLOR:
            if (va.format == IQM_FLOAT && va.size == 4)
                vcolor4f = (const float *)(pbase + va.offset);
            if (va.format == IQM_UBYTE && va.size == 4)
                vcolor4ub = (const unsigned char *)(pbase + va.offset);
            break;
        }
    }
    if (header.num_vertexes > 0 && (!vposition || !vtexcoord || ((header.num_frames > 0 || header.num_anims > 0) && (!vblendindexes || !vblendweights))))
    {
        Con_Printf("%s is missing vertex array data\n", loadmodel->name);
        return;
    }
 
    text = header.num_text && header.ofs_text ? (const char *)(pbase + header.ofs_text) : "";
 
    loadmodel->Draw = R_Mod_Draw;
    loadmodel->DrawDepth = R_Mod_DrawDepth;
    loadmodel->DrawDebug = R_Mod_DrawDebug;
    loadmodel->DrawPrepass = R_Mod_DrawPrepass;
    loadmodel->CompileShadowMap = R_Mod_CompileShadowMap;
    loadmodel->DrawShadowMap = R_Mod_DrawShadowMap;
    loadmodel->DrawLight = R_Mod_DrawLight;
    loadmodel->TraceBox = Mod_MDLMD2MD3_TraceBox;
    loadmodel->TraceLine = Mod_MDLMD2MD3_TraceLine;
    loadmodel->PointSuperContents = NULL;
    loadmodel->AnimateVertices = Mod_Skeletal_AnimateVertices;
 
    // load external .skin files if present
    skinfiles = Mod_LoadSkinFiles();
    if (loadmodel->numskins < 1)
        loadmodel->numskins = 1;
 
    loadmodel->numframes = max(header.num_anims, 1);
    loadmodel->num_bones = header.num_joints;
    loadmodel->num_poses = max(header.num_frames, 1);
    loadmodel->submodelsurfaces_start = 0;
    loadmodel->submodelsurfaces_end = loadmodel->num_surfaces = header.num_meshes;
    loadmodel->num_textures = loadmodel->num_surfaces * loadmodel->numskins;
    loadmodel->num_texturesperskin = loadmodel->num_surfaces;
    loadmodel->surfmesh.num_vertices = header.num_vertexes;
    loadmodel->surfmesh.num_triangles = header.num_triangles;
 
    // do most allocations as one merged chunk
    // This is only robust for C standard types!
    data = (unsigned char *)Mem_Alloc(loadmodel->mempool,
        loadmodel->surfmesh.num_vertices * (sizeof(float[14]) + (vcolor4f || vcolor4ub ? sizeof(float[4]) : 0))
        + loadmodel->num_bones * sizeof(float[12])
        + loadmodel->num_surfaces * sizeof(int)
        + loadmodel->surfmesh.num_triangles * sizeof(int[3])
        + (loadmodel->surfmesh.num_vertices <= 65536 ? loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]) : 0)
        + loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7])
        + (vblendindexes && vblendweights ? loadmodel->surfmesh.num_vertices * (sizeof(unsigned short) + sizeof(unsigned char[2][4])) : 0));
    // Pointers must be taken in descending order of alignment requirement!
    loadmodel->surfmesh.data_vertex3f          = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_svector3f         = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_tvector3f         = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_normal3f          = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[3]);
    loadmodel->surfmesh.data_texcoordtexture2f = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[2]);
    if (vcolor4f || vcolor4ub)
    {
        loadmodel->surfmesh.data_lightmapcolor4f = (float *)data; data += loadmodel->surfmesh.num_vertices * sizeof(float[4]);
    }
    loadmodel->data_baseboneposeinverse = (float *)data; data += loadmodel->num_bones * sizeof(float[12]);
    loadmodel->modelsurfaces_sorted       = (int *)data; data += loadmodel->num_surfaces * sizeof(int);
    loadmodel->surfmesh.data_element3i    = (int *)data; data += loadmodel->surfmesh.num_triangles * sizeof(int[3]);
    loadmodel->data_poses7s             = (short *)data; data += loadmodel->num_poses * loadmodel->num_bones * sizeof(short[7]);
    if (loadmodel->surfmesh.num_vertices <= 65536)
    {
        loadmodel->surfmesh.data_element3s = (unsigned short *)data; data += loadmodel->surfmesh.num_triangles * sizeof(unsigned short[3]);
    }
    if (vblendindexes && vblendweights)
    {
        loadmodel->surfmesh.num_blends = 0;
        loadmodel->surfmesh.blends                = (unsigned short *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned short);
        loadmodel->surfmesh.data_skeletalindex4ub  = (unsigned char *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
        loadmodel->surfmesh.data_skeletalweight4ub = (unsigned char *)data; data += loadmodel->surfmesh.num_vertices * sizeof(unsigned char[4]);
    }
    // Struct alignment requirements could change so we can't assume them here
    // otherwise a safe-looking commit could introduce undefined behaviour!
    loadmodel->data_surfaces = Mem_AllocType(loadmodel->mempool, msurface_t, loadmodel->num_surfaces * sizeof(msurface_t));
    loadmodel->data_textures = Mem_AllocType(loadmodel->mempool, texture_t, loadmodel->num_surfaces * loadmodel->numskins * sizeof(texture_t));
    loadmodel->skinscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numskins * sizeof(animscene_t));
    loadmodel->data_bones = Mem_AllocType(loadmodel->mempool, aliasbone_t, loadmodel->num_bones * sizeof(aliasbone_t));
    loadmodel->animscenes = Mem_AllocType(loadmodel->mempool, animscene_t, loadmodel->numframes * sizeof(animscene_t));
    if (vblendindexes && vblendweights)
        loadmodel->surfmesh.data_blendweights = Mem_AllocType(loadmodel->mempool, blendweights_t, loadmodel->surfmesh.num_vertices * sizeof(blendweights_t));
 
    for (i = 0;i < loadmodel->numskins;i++)
    {
        loadmodel->skinscenes[i].firstframe = i;
        loadmodel->skinscenes[i].framecount = 1;
        loadmodel->skinscenes[i].loop = true;
        loadmodel->skinscenes[i].framerate = 10;
    }
 
    // load the bone info
    if (header.version == 1)
    {
        iqmjoint1_t *injoints1 = (iqmjoint1_t *)(pbase + header.ofs_joints);
 
        if (loadmodel->num_bones)
            joint1 = (iqmjoint1_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_bones * sizeof(iqmjoint1_t));
        for (i = 0;i < loadmodel->num_bones;i++)
        {
            matrix4x4_t relbase, relinvbase, pinvbase, invbase;
            iqmjoint1_t injoint1;
 
            memcpy(&injoint1, &injoints1[i], sizeof(iqmjoint1_t));
            joint1[i].name = LittleLong(injoint1.name);
            joint1[i].parent = LittleLong(injoint1.parent);
            for (j = 0;j < 3;j++)
            {
                joint1[i].origin[j] = LittleFloat(injoint1.origin[j]);
                joint1[i].rotation[j] = LittleFloat(injoint1.rotation[j]);
                joint1[i].scale[j] = LittleFloat(injoint1.scale[j]);
            }
            dp_strlcpy(loadmodel->data_bones[i].name, &text[joint1[i].name], sizeof(loadmodel->data_bones[i].name));
            loadmodel->data_bones[i].parent = joint1[i].parent;
            if (loadmodel->data_bones[i].parent >= i)
                Host_Error("%s bone[%i].parent >= %i", loadmodel->name, i, i);
            Matrix4x4_FromDoom3Joint(&relbase, joint1[i].origin[0], joint1[i].origin[1], joint1[i].origin[2], joint1[i].rotation[0], joint1[i].rotation[1], joint1[i].rotation[2]);
            Matrix4x4_Invert_Simple(&relinvbase, &relbase);
            if (loadmodel->data_bones[i].parent >= 0)
            {
                Matrix4x4_FromArray12FloatD3D(&pinvbase, loadmodel->data_baseboneposeinverse + 12*loadmodel->data_bones[i].parent);
                Matrix4x4_Concat(&invbase, &relinvbase, &pinvbase);
                Matrix4x4_ToArray12FloatD3D(&invbase, loadmodel->data_baseboneposeinverse + 12*i);
            }
            else Matrix4x4_ToArray12FloatD3D(&relinvbase, loadmodel->data_baseboneposeinverse + 12*i);
        }
    }
    else
    {
        iqmjoint_t *injoints = (iqmjoint_t *)(pbase + header.ofs_joints);
 
        if (header.num_joints)
            joint = (iqmjoint_t *)Mem_Alloc(loadmodel->mempool, loadmodel->num_bones * sizeof(iqmjoint_t));
        for (i = 0;i < loadmodel->num_bones;i++)
        {
            matrix4x4_t relbase, relinvbase, pinvbase, invbase;
            iqmjoint_t injoint;
 
            memcpy(&injoint, &injoints[i], sizeof(iqmjoint_t));
            joint[i].name = LittleLong(injoint.name);
            joint[i].parent = LittleLong(injoint.parent);
            for (j = 0;j < 3;j++)
            {
                joint[i].origin[j] = LittleFloat(injoint.origin[j]);
                joint[i].rotation[j] = LittleFloat(injoint.rotation[j]);
                joint[i].scale[j] = LittleFloat(injoint.scale[j]);
            }
            joint[i].rotation[3] = LittleFloat(injoint.rotation[3]);
            dp_strlcpy(loadmodel->data_bones[i].name, &text[joint[i].name], sizeof(loadmodel->data_bones[i].name));
            loadmodel->data_bones[i].parent = joint[i].parent;
            if (loadmodel->data_bones[i].parent >= i)
                Host_Error("%s bone[%i].parent >= %i", loadmodel->name, i, i);
            if (joint[i].rotation[3] > 0)
                Vector4Negate(joint[i].rotation, joint[i].rotation);
            Vector4Normalize2(joint[i].rotation, joint[i].rotation);
            Matrix4x4_FromDoom3Joint(&relbase, joint[i].origin[0], joint[i].origin[1], joint[i].origin[2], joint[i].rotation[0], joint[i].rotation[1], joint[i].rotation[2]);
            Matrix4x4_Invert_Simple(&relinvbase, &relbase);
            if (loadmodel->data_bones[i].parent >= 0)
            {
                Matrix4x4_FromArray12FloatD3D(&pinvbase, loadmodel->data_baseboneposeinverse + 12*loadmodel->data_bones[i].parent);
                Matrix4x4_Concat(&invbase, &relinvbase, &pinvbase);
                Matrix4x4_ToArray12FloatD3D(&invbase, loadmodel->data_baseboneposeinverse + 12*i);
            }   
            else Matrix4x4_ToArray12FloatD3D(&relinvbase, loadmodel->data_baseboneposeinverse + 12*i);
        }
    }
 
    // set up the animscenes based on the anims
    for (i = 0;i < (int)header.num_anims;i++)
    {
        iqmanim_t anim;
 
        memcpy(&anim, &anims[i], sizeof(iqmanim_t));
        anim.name = LittleLong(anim.name);
        anim.first_frame = LittleLong(anim.first_frame);
        anim.num_frames = LittleLong(anim.num_frames);
        anim.framerate = LittleFloat(anim.framerate);
        anim.flags = LittleLong(anim.flags);
        dp_strlcpy(loadmodel->animscenes[i].name, &text[anim.name], sizeof(loadmodel->animscenes[i].name));
        loadmodel->animscenes[i].firstframe = anim.first_frame;
        loadmodel->animscenes[i].framecount = anim.num_frames;
        loadmodel->animscenes[i].loop = ((anim.flags & IQM_LOOP) != 0);
        loadmodel->animscenes[i].framerate = anim.framerate;
    }
    if (header.num_anims <= 0)
    {
        dp_strlcpy(loadmodel->animscenes[0].name, "static", sizeof(loadmodel->animscenes[0].name));
        loadmodel->animscenes[0].firstframe = 0;
        loadmodel->animscenes[0].framecount = 1;
        loadmodel->animscenes[0].loop = true;
        loadmodel->animscenes[0].framerate = 10;
    }
 
    loadmodel->surfmesh.isanimated = loadmodel->num_bones > 1 || loadmodel->numframes > 1 || (loadmodel->animscenes && loadmodel->animscenes[0].framecount > 1);
    if(mod_alias_force_animated.string[0])
        loadmodel->surfmesh.isanimated = mod_alias_force_animated.integer != 0;
 
    biggestorigin = 0;
    if (header.version == 1)
    {
        iqmpose1_t *inposes1 = (iqmpose1_t *)(pbase + header.ofs_poses);
 
        if (header.num_poses)
            pose1 = (iqmpose1_t *)Mem_Alloc(loadmodel->mempool, header.num_poses * sizeof(iqmpose1_t));
        for (i = 0;i < (int)header.num_poses;i++)
        {
            float f;
            iqmpose1_t inpose;
 
            memcpy(&inpose, &inposes1[i], sizeof(iqmpose1_t));
            pose1[i].parent = LittleLong(inpose.parent);
            pose1[i].channelmask = LittleLong(inpose.channelmask);
            for (j = 0;j < 9;j++)
            {
                pose1[i].channeloffset[j] = LittleFloat(inpose.channeloffset[j]);
                pose1[i].channelscale[j] = LittleFloat(inpose.channelscale[j]);
            }
            f = fabs(pose1[i].channeloffset[0]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose1[i].channeloffset[1]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose1[i].channeloffset[2]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose1[i].channeloffset[0] + 0xFFFF*pose1[i].channelscale[0]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose1[i].channeloffset[1] + 0xFFFF*pose1[i].channelscale[1]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose1[i].channeloffset[2] + 0xFFFF*pose1[i].channelscale[2]); biggestorigin = max(biggestorigin, f);
        }
        if (header.num_frames <= 0)
        {
            for (i = 0;i < loadmodel->num_bones;i++)
            {
                float f;
                f = fabs(joint1[i].origin[0]); biggestorigin = max(biggestorigin, f);
                f = fabs(joint1[i].origin[1]); biggestorigin = max(biggestorigin, f);
                f = fabs(joint1[i].origin[2]); biggestorigin = max(biggestorigin, f);
            }
        }
    }
    else
    {
        iqmpose_t *inposes = (iqmpose_t *)(pbase + header.ofs_poses);
 
        if (header.num_poses)
            pose = (iqmpose_t *)Mem_Alloc(loadmodel->mempool, header.num_poses * sizeof(iqmpose_t));
        for (i = 0;i < (int)header.num_poses;i++)
        {
            float f;
            iqmpose_t inpose;
 
            memcpy(&inpose, &inposes[i], sizeof(iqmpose_t));
            pose[i].parent = LittleLong(inpose.parent);
            pose[i].channelmask = LittleLong(inpose.channelmask);
            for (j = 0;j < 10;j++)
            {
                pose[i].channeloffset[j] = LittleFloat(inpose.channeloffset[j]);
                pose[i].channelscale[j] = LittleFloat(inpose.channelscale[j]);
            }
            f = fabs(pose[i].channeloffset[0]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose[i].channeloffset[1]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose[i].channeloffset[2]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose[i].channeloffset[0] + 0xFFFF*pose[i].channelscale[0]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose[i].channeloffset[1] + 0xFFFF*pose[i].channelscale[1]); biggestorigin = max(biggestorigin, f);
            f = fabs(pose[i].channeloffset[2] + 0xFFFF*pose[i].channelscale[2]); biggestorigin = max(biggestorigin, f);
        }
        if (header.num_frames <= 0)
        {
            for (i = 0;i < loadmodel->num_bones;i++)
            {
                float f;
                f = fabs(joint[i].origin[0]); biggestorigin = max(biggestorigin, f);
                f = fabs(joint[i].origin[1]); biggestorigin = max(biggestorigin, f);
                f = fabs(joint[i].origin[2]); biggestorigin = max(biggestorigin, f);
            }
        }
    }
    loadmodel->num_posescale = biggestorigin / 32767.0f;
    loadmodel->num_poseinvscale = 1.0f / loadmodel->num_posescale;
 
    // load the pose data
    // this unaligned memory access is safe (LittleShort reads as bytes)
    framedata = (const unsigned short *)(pbase + header.ofs_frames);
    if (header.version == 1)
    {
        for (i = 0, k = 0;i < (int)header.num_frames;i++)
        {
            for (j = 0;j < (int)header.num_poses;j++, k++)
            {
                float qx, qy, qz, qw;
                loadmodel->data_poses7s[k*7 + 0] = loadmodel->num_poseinvscale * (pose1[j].channeloffset[0] + (pose1[j].channelmask&1 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[0] : 0));
                loadmodel->data_poses7s[k*7 + 1] = loadmodel->num_poseinvscale * (pose1[j].channeloffset[1] + (pose1[j].channelmask&2 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[1] : 0));
                loadmodel->data_poses7s[k*7 + 2] = loadmodel->num_poseinvscale * (pose1[j].channeloffset[2] + (pose1[j].channelmask&4 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[2] : 0));
                qx = pose1[j].channeloffset[3] + (pose1[j].channelmask&8 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[3] : 0);
                qy = pose1[j].channeloffset[4] + (pose1[j].channelmask&16 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[4] : 0);
                qz = pose1[j].channeloffset[5] + (pose1[j].channelmask&32 ? (unsigned short)LittleShort(*framedata++) * pose1[j].channelscale[5] : 0);
                qw = 1.0f - (qx*qx + qy*qy + qz*qz);
                qw = qw > 0.0f ? -sqrt(qw) : 0.0f;
                loadmodel->data_poses7s[k*7 + 3] = 32767.0f * qx;
                loadmodel->data_poses7s[k*7 + 4] = 32767.0f * qy;
                loadmodel->data_poses7s[k*7 + 5] = 32767.0f * qz;
                loadmodel->data_poses7s[k*7 + 6] = 32767.0f * qw;
                // skip scale data for now
                if(pose1[j].channelmask&64) framedata++;
                if(pose1[j].channelmask&128) framedata++;
                if(pose1[j].channelmask&256) framedata++;
            }
        }
        if (header.num_frames <= 0)
        {
            for (i = 0;i < loadmodel->num_bones;i++)
            {
                float qx, qy, qz, qw;
                loadmodel->data_poses7s[i*7 + 0] = loadmodel->num_poseinvscale * joint1[i].origin[0];
                loadmodel->data_poses7s[i*7 + 1] = loadmodel->num_poseinvscale * joint1[i].origin[1];
                loadmodel->data_poses7s[i*7 + 2] = loadmodel->num_poseinvscale * joint1[i].origin[2];
                qx = joint1[i].rotation[0];
                qy = joint1[i].rotation[1];
                qz = joint1[i].rotation[2];
                qw = 1.0f - (qx*qx + qy*qy + qz*qz);
                qw = qw > 0.0f ? -sqrt(qw) : 0.0f;
                loadmodel->data_poses7s[i*7 + 3] = 32767.0f * qx;
                loadmodel->data_poses7s[i*7 + 4] = 32767.0f * qy;
                loadmodel->data_poses7s[i*7 + 5] = 32767.0f * qz;
                loadmodel->data_poses7s[i*7 + 6] = 32767.0f * qw;
            }
        }
    }
    else
    {
        for (i = 0, k = 0;i < (int)header.num_frames;i++)   
        {
            for (j = 0;j < (int)header.num_poses;j++, k++)
            {
                float rot[4];
                loadmodel->data_poses7s[k*7 + 0] = loadmodel->num_poseinvscale * (pose[j].channeloffset[0] + (pose[j].channelmask&1 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[0] : 0));
                loadmodel->data_poses7s[k*7 + 1] = loadmodel->num_poseinvscale * (pose[j].channeloffset[1] + (pose[j].channelmask&2 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[1] : 0));
                loadmodel->data_poses7s[k*7 + 2] = loadmodel->num_poseinvscale * (pose[j].channeloffset[2] + (pose[j].channelmask&4 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[2] : 0));
                rot[0] = pose[j].channeloffset[3] + (pose[j].channelmask&8 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[3] : 0);
                rot[1] = pose[j].channeloffset[4] + (pose[j].channelmask&16 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[4] : 0);
                rot[2] = pose[j].channeloffset[5] + (pose[j].channelmask&32 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[5] : 0);
                rot[3] = pose[j].channeloffset[6] + (pose[j].channelmask&64 ? (unsigned short)LittleShort(*framedata++) * pose[j].channelscale[6] : 0);
                if (rot[3] > 0)
                    Vector4Negate(rot, rot);
                Vector4Normalize2(rot, rot);
                loadmodel->data_poses7s[k*7 + 3] = 32767.0f * rot[0];
                loadmodel->data_poses7s[k*7 + 4] = 32767.0f * rot[1];
                loadmodel->data_poses7s[k*7 + 5] = 32767.0f * rot[2];
                loadmodel->data_poses7s[k*7 + 6] = 32767.0f * rot[3];
                // skip scale data for now
                if(pose[j].channelmask&128) framedata++;
                if(pose[j].channelmask&256) framedata++;
                if(pose[j].channelmask&512) framedata++;
            }
        }
        if (header.num_frames <= 0)
        {
            for (i = 0;i < loadmodel->num_bones;i++)
            {
                loadmodel->data_poses7s[i*7 + 0] = loadmodel->num_poseinvscale * joint[i].origin[0];
                loadmodel->data_poses7s[i*7 + 1] = loadmodel->num_poseinvscale * joint[i].origin[1];
                loadmodel->data_poses7s[i*7 + 2] = loadmodel->num_poseinvscale * joint[i].origin[2];
                loadmodel->data_poses7s[i*7 + 3] = 32767.0f * joint[i].rotation[0];
                loadmodel->data_poses7s[i*7 + 4] = 32767.0f * joint[i].rotation[1];
                loadmodel->data_poses7s[i*7 + 5] = 32767.0f * joint[i].rotation[2];
                loadmodel->data_poses7s[i*7 + 6] = 32767.0f * joint[i].rotation[3];
            }
        }
    }
 
    // load bounding box data
    if (header.ofs_bounds)
    {
        float xyradius = 0, radius = 0;
        VectorClear(loadmodel->normalmins);
        VectorClear(loadmodel->normalmaxs);
        for (i = 0; i < (int)header.num_frames;i++)
        {
            iqmbounds_t bound;
            bound.mins[0] = LittleFloat(bounds[i].mins[0]);
            bound.mins[1] = LittleFloat(bounds[i].mins[1]);
            bound.mins[2] = LittleFloat(bounds[i].mins[2]);
            bound.maxs[0] = LittleFloat(bounds[i].maxs[0]);         
            bound.maxs[1] = LittleFloat(bounds[i].maxs[1]); 
            bound.maxs[2] = LittleFloat(bounds[i].maxs[2]); 
            bound.xyradius = LittleFloat(bounds[i].xyradius);
            bound.radius = LittleFloat(bounds[i].radius);
            if (!i)
            {
                VectorCopy(bound.mins, loadmodel->normalmins);
                VectorCopy(bound.maxs, loadmodel->normalmaxs);
            }
            else
            {
                if (loadmodel->normalmins[0] > bound.mins[0]) loadmodel->normalmins[0] = bound.mins[0];
                if (loadmodel->normalmins[1] > bound.mins[1]) loadmodel->normalmins[1] = bound.mins[1];
                if (loadmodel->normalmins[2] > bound.mins[2]) loadmodel->normalmins[2] = bound.mins[2];
                if (loadmodel->normalmaxs[0] < bound.maxs[0]) loadmodel->normalmaxs[0] = bound.maxs[0];
                if (loadmodel->normalmaxs[1] < bound.maxs[1]) loadmodel->normalmaxs[1] = bound.maxs[1];
                if (loadmodel->normalmaxs[2] < bound.maxs[2]) loadmodel->normalmaxs[2] = bound.maxs[2];
            }
            if (bound.xyradius > xyradius)
                xyradius = bound.xyradius;
            if (bound.radius > radius)
                radius = bound.radius;
        }
        loadmodel->yawmins[0] = loadmodel->yawmins[1] = -xyradius;
        loadmodel->yawmaxs[0] = loadmodel->yawmaxs[1] = xyradius;
        loadmodel->yawmins[2] = loadmodel->normalmins[2];
        loadmodel->yawmaxs[2] = loadmodel->normalmaxs[2];
        loadmodel->rotatedmins[0] = loadmodel->rotatedmins[1] = loadmodel->rotatedmins[2] = -radius;
        loadmodel->rotatedmaxs[0] = loadmodel->rotatedmaxs[1] = loadmodel->rotatedmaxs[2] = radius;
        loadmodel->radius = radius;
        loadmodel->radius2 = radius * radius;
    }
 
    // load triangle data
    // this unaligned memory access is safe (LittleLong reads as bytes)
    inelements = (const unsigned int *)(pbase + header.ofs_triangles);
    outelements = loadmodel->surfmesh.data_element3i;
    for (i = 0;i < (int)header.num_triangles;i++)
    {
        outelements[0] = LittleLong(inelements[0]);
        outelements[1] = LittleLong(inelements[1]);
        outelements[2] = LittleLong(inelements[2]);
        outelements += 3;
        inelements += 3;
    }
    if (loadmodel->surfmesh.data_element3s)
        for (i = 0;i < loadmodel->surfmesh.num_triangles*3;i++)
            loadmodel->surfmesh.data_element3s[i] = loadmodel->surfmesh.data_element3i[i];
    Mod_ValidateElements(loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_element3s, loadmodel->surfmesh.num_triangles, 0, header.num_vertexes, __FILE__, __LINE__);
 
    // load vertex data
    // this unaligned memory access is safe (LittleFloat reads as bytes)
    outvertex = loadmodel->surfmesh.data_vertex3f;
    for (i = 0;i < (int)header.num_vertexes;i++)
    {
        outvertex[0] = LittleFloat(vposition[0]);
        outvertex[1] = LittleFloat(vposition[1]);
        outvertex[2] = LittleFloat(vposition[2]);
        vposition += 3;
        outvertex += 3;
    }
 
    outtexcoord = loadmodel->surfmesh.data_texcoordtexture2f;
    // this unaligned memory access is safe (LittleFloat reads as bytes)
    for (i = 0;i < (int)header.num_vertexes;i++)
    {
        outtexcoord[0] = LittleFloat(vtexcoord[0]);
        outtexcoord[1] = LittleFloat(vtexcoord[1]);
        vtexcoord += 2;
        outtexcoord += 2;
    }
 
    // this unaligned memory access is safe (LittleFloat reads as bytes)
    if(vnormal)
    {
        outnormal = loadmodel->surfmesh.data_normal3f;
        for (i = 0;i < (int)header.num_vertexes;i++)
        {
            outnormal[0] = LittleFloat(vnormal[0]);
            outnormal[1] = LittleFloat(vnormal[1]);
            outnormal[2] = LittleFloat(vnormal[2]);
            vnormal += 3;
            outnormal += 3;
        }
    }
 
    // this unaligned memory access is safe (LittleFloat reads as bytes)
    if(vnormal && vtangent)
    {
        outnormal = loadmodel->surfmesh.data_normal3f;
        outsvector = loadmodel->surfmesh.data_svector3f;
        outtvector = loadmodel->surfmesh.data_tvector3f;
        for (i = 0;i < (int)header.num_vertexes;i++)
        {
            outsvector[0] = LittleFloat(vtangent[0]);
            outsvector[1] = LittleFloat(vtangent[1]);
            outsvector[2] = LittleFloat(vtangent[2]);
            if(LittleFloat(vtangent[3]) < 0)
                CrossProduct(outsvector, outnormal, outtvector);
            else
                CrossProduct(outnormal, outsvector, outtvector);
            vtangent += 4;
            outnormal += 3;
            outsvector += 3;
            outtvector += 3;
        }
    }
 
    // this unaligned memory access is safe (all bytes)
    if (vblendindexes && vblendweights)
    {
        for (i = 0; i < (int)header.num_vertexes;i++)
        {
            blendweights_t weights;
            memcpy(weights.index, vblendindexes + i*4, 4);
            memcpy(weights.influence, vblendweights + i*4, 4);
            loadmodel->surfmesh.blends[i] = Mod_Skeletal_AddBlend(loadmodel, &weights);
            loadmodel->surfmesh.data_skeletalindex4ub[i*4  ] = weights.index[0];
            loadmodel->surfmesh.data_skeletalindex4ub[i*4+1] = weights.index[1];
            loadmodel->surfmesh.data_skeletalindex4ub[i*4+2] = weights.index[2];
            loadmodel->surfmesh.data_skeletalindex4ub[i*4+3] = weights.index[3];
            loadmodel->surfmesh.data_skeletalweight4ub[i*4  ] = weights.influence[0];
            loadmodel->surfmesh.data_skeletalweight4ub[i*4+1] = weights.influence[1];
            loadmodel->surfmesh.data_skeletalweight4ub[i*4+2] = weights.influence[2];
            loadmodel->surfmesh.data_skeletalweight4ub[i*4+3] = weights.influence[3];
        }
    }
 
    if (vcolor4f)
    {
        outcolor = loadmodel->surfmesh.data_lightmapcolor4f;
        // this unaligned memory access is safe (LittleFloat reads as bytes)
        for (i = 0;i < (int)header.num_vertexes;i++)
        {
            outcolor[0] = LittleFloat(vcolor4f[0]);
            outcolor[1] = LittleFloat(vcolor4f[1]);
            outcolor[2] = LittleFloat(vcolor4f[2]);
            outcolor[3] = LittleFloat(vcolor4f[3]);
            vcolor4f += 4;
            outcolor += 4;
        }
    }
    else if (vcolor4ub)
    {
        outcolor = loadmodel->surfmesh.data_lightmapcolor4f;
        // this unaligned memory access is safe (all bytes)
        for (i = 0;i < (int)header.num_vertexes;i++)
        {
            outcolor[0] = vcolor4ub[0] * (1.0f / 255.0f);
            outcolor[1] = vcolor4ub[1] * (1.0f / 255.0f);
            outcolor[2] = vcolor4ub[2] * (1.0f / 255.0f);
            outcolor[3] = vcolor4ub[3] * (1.0f / 255.0f);
            vcolor4ub += 4;
            outcolor += 4;
        }
    }
 
    // load meshes
    for (i = 0;i < (int)header.num_meshes;i++)
    {
        iqmmesh_t mesh;
        msurface_t *surface;
 
        memcpy(&mesh, &meshes[i], sizeof(iqmmesh_t));
        mesh.name = LittleLong(mesh.name);
        mesh.material = LittleLong(mesh.material);
        mesh.first_vertex = LittleLong(mesh.first_vertex);
        mesh.num_vertexes = LittleLong(mesh.num_vertexes);
        mesh.first_triangle = LittleLong(mesh.first_triangle);
        mesh.num_triangles = LittleLong(mesh.num_triangles);
 
        loadmodel->modelsurfaces_sorted[i] = i;
        surface = loadmodel->data_surfaces + i;
        surface->texture = loadmodel->data_textures + i;
        surface->num_firsttriangle = mesh.first_triangle;
        surface->num_triangles = mesh.num_triangles;
        surface->num_firstvertex = mesh.first_vertex;
        surface->num_vertices = mesh.num_vertexes;
 
        Mod_BuildAliasSkinsFromSkinFiles(loadmodel->data_textures + i, skinfiles, &text[mesh.name], &text[mesh.material]);
    }
 
    Mod_FreeSkinFiles(skinfiles);
    Mod_MakeSortedSurfaces(loadmodel);
 
    // compute all the mesh information that was not loaded from the file
    if (!vnormal)
        Mod_BuildNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_normal3f, r_smoothnormals_areaweighting.integer != 0);
    if (!vnormal || !vtangent)
        Mod_BuildTextureVectorsFromNormals(0, loadmodel->surfmesh.num_vertices, loadmodel->surfmesh.num_triangles, loadmodel->surfmesh.data_vertex3f, loadmodel->surfmesh.data_texcoordtexture2f, loadmodel->surfmesh.data_normal3f, loadmodel->surfmesh.data_element3i, loadmodel->surfmesh.data_svector3f, loadmodel->surfmesh.data_tvector3f, r_smoothnormals_areaweighting.integer != 0);
    if (!header.ofs_bounds)
        Mod_Alias_CalculateBoundingBox();
 
    // Always make a BIH for the first frame, we can use it where possible.
    Mod_MakeCollisionBIH(loadmodel, true, &loadmodel->collision_bih);
    if (!loadmodel->surfmesh.isanimated)
    {
        loadmodel->TraceBox = Mod_CollisionBIH_TraceBox;
        loadmodel->TraceBrush = Mod_CollisionBIH_TraceBrush;
        loadmodel->TraceLine = Mod_CollisionBIH_TraceLine;
        loadmodel->TracePoint = Mod_CollisionBIH_TracePoint_Mesh;
        loadmodel->PointSuperContents = Mod_CollisionBIH_PointSuperContents_Mesh;
    }
 
    if (joint)  { Mem_Free(joint);  joint  = NULL; }
    if (joint1) { Mem_Free(joint1); joint1 = NULL; }
    if (pose)   { Mem_Free(pose);   pose   = NULL; }
    if (pose1)  { Mem_Free(pose1);  pose1  = NULL; }
}