r_explosion.c File Reference

#include "quakedef.h"
#include "cl_collision.h"

Include dependency graph for r_explosion.c:

Go to the source code of this file.

Data Structures
struct	explosion_t

Macros
#define	EXPLOSIONGRID   8
#define	EXPLOSIONTRIS   (EXPLOSIONGRID*EXPLOSIONGRID*2)
#define	EXPLOSIONVERTS   ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))

Functions
static void	R_DrawExplosion_TransparentCallback (const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
void	R_DrawExplosions (void)
void	R_Explosion_Init (void)
static void	r_explosion_newmap (void)
static void	r_explosion_shutdown (void)
static void	r_explosion_start (void)
static int	R_ExplosionVert (int column, int row)
static void	R_MoveExplosion (explosion_t *e)
void	R_NewExplosion (const vec3_t org)

Variables
static explosion_t	explosion [MAX_EXPLOSIONS]
static int	explosionnoiseindex [EXPLOSIONVERTS]
static vec3_t	explosionpoint [EXPLOSIONVERTS]
static float	explosiontexcoord2f [EXPLOSIONVERTS][2]
static rtexture_t *	explosiontexture
static rtexturepool_t *	explosiontexturepool
static unsigned short	explosiontris [EXPLOSIONTRIS][3]
static int	numexplosions = 0
static cvar_t	r_drawexplosions = {CF_CLIENT, "r_drawexplosions", "1", "enables rendering of explosion shells (see also cl_particles_explosions_shell)"}
cvar_t	r_explosionclip = {CF_CLIENT | CF_ARCHIVE, "r_explosionclip", "1", "enables collision detection for explosion shell (so that it flattens against walls and floors)"}

Macro Definition Documentation

EXPLOSIONGRID

#define EXPLOSIONGRID   8

Definition at line 25 of file r_explosion.c.

Referenced by R_Explosion_Init(), R_ExplosionVert(), and R_NewExplosion().

EXPLOSIONTRIS

#define EXPLOSIONTRIS   (EXPLOSIONGRID*EXPLOSIONGRID*2)

Definition at line 27 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback().

EXPLOSIONVERTS

#define EXPLOSIONVERTS   ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))

Definition at line 26 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback(), R_MoveExplosion(), and R_NewExplosion().

Function Documentation

R_DrawExplosion_TransparentCallback()

static void R_DrawExplosion_TransparentCallback ( const entity_render_t * ent, const rtlight_t * rtlight, int numsurfaces, int * surfacelist )

static

Definition at line 203 of file r_explosion.c.

{
    int surfacelistindex = 0;
    const int numtriangles = EXPLOSIONTRIS, numverts = EXPLOSIONVERTS;
    GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
    GL_DepthMask(false);
    GL_DepthRange(0, 1);
    GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
    GL_DepthTest(true);
    GL_CullFace(r_refdef.view.cullface_back);
    R_EntityMatrix(&identitymatrix);
 
//  R_Mesh_ResetTextureState();
    R_SetupShader_Generic(explosiontexture, false, false, false);
    for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
    {
        const explosion_t *e = explosion + surfacelist[surfacelistindex];
        // FIXME: this can't properly handle r_refdef.view.colorscale > 1
        GL_Color(e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, 1);
        R_Mesh_PrepareVertices_Generic_Arrays(numverts, e->vert[0], NULL, explosiontexcoord2f[0]);
        R_Mesh_Draw(0, numverts, 0, numtriangles, NULL, NULL, 0, explosiontris[0], NULL, 0);
    }
}

References explosion_t::alpha, r_refdef_view_t::colorscale, r_refdef_view_t::cullface_back, explosion, explosiontexcoord2f, explosiontexture, EXPLOSIONTRIS, explosiontris, EXPLOSIONVERTS, GL_BlendFunc(), GL_Color(), GL_CullFace(), GL_DepthMask(), GL_DepthRange(), GL_DepthTest(), GL_ONE, GL_PolygonOffset(), GL_SRC_ALPHA, identitymatrix, NULL, r_refdef_t::polygonfactor, r_refdef_t::polygonoffset, R_EntityMatrix(), R_Mesh_Draw(), R_Mesh_PrepareVertices_Generic_Arrays(), r_refdef, R_SetupShader_Generic(), explosion_t::vert, and r_refdef_t::view.

Referenced by R_DrawExplosions().

R_DrawExplosions()

void R_DrawExplosions

(

void

)

Definition at line 264 of file r_explosion.c.

{
#ifdef MAX_EXPLOSIONS
    int i;
 
    if (!r_drawexplosions.integer)
        return;
 
    for (i = 0;i < numexplosions;i++)
    {
        if (explosion[i].alpha)
        {
            R_MoveExplosion(&explosion[i]);
            if (explosion[i].alpha)
                R_MeshQueue_AddTransparent(TRANSPARENTSORT_DISTANCE, explosion[i].origin, R_DrawExplosion_TransparentCallback, NULL, i, NULL);
        }
    }
    while (numexplosions > 0 && explosion[i-1].alpha <= 0)
        numexplosions--;
#endif
}

References alpha, explosion, i, cvar_t::integer, NULL, numexplosions, origin, R_DrawExplosion_TransparentCallback(), r_drawexplosions, R_MeshQueue_AddTransparent(), R_MoveExplosion(), and TRANSPARENTSORT_DISTANCE.

Referenced by R_RenderScene().

R_Explosion_Init()

void R_Explosion_Init

(

void

)

Definition at line 131 of file r_explosion.c.

{
#ifdef MAX_EXPLOSIONS
    int i, x, y;
    i = 0;
    for (y = 0;y < EXPLOSIONGRID;y++)
    {
        for (x = 0;x < EXPLOSIONGRID;x++)
        {
            explosiontris[i][0] = R_ExplosionVert(x    , y    );
            explosiontris[i][1] = R_ExplosionVert(x + 1, y    );
            explosiontris[i][2] = R_ExplosionVert(x    , y + 1);
            i++;
            explosiontris[i][0] = R_ExplosionVert(x + 1, y    );
            explosiontris[i][1] = R_ExplosionVert(x + 1, y + 1);
            explosiontris[i][2] = R_ExplosionVert(x    , y + 1);
            i++;
        }
    }
 
#endif
    Cvar_RegisterVariable(&r_explosionclip);
#ifdef MAX_EXPLOSIONS
    Cvar_RegisterVariable(&r_drawexplosions);
 
    R_RegisterModule("R_Explosions", r_explosion_start, r_explosion_shutdown, r_explosion_newmap, NULL, NULL);
#endif
}

References Cvar_RegisterVariable(), EXPLOSIONGRID, explosiontris, i, NULL, r_drawexplosions, r_explosion_newmap(), r_explosion_shutdown(), r_explosion_start(), r_explosionclip, R_ExplosionVert(), R_RegisterModule(), x, and y.

Referenced by Render_Init().

r_explosion_newmap()

static void r_explosion_newmap ( void )

static

Definition at line 105 of file r_explosion.c.

{
    numexplosions = 0;
    memset(explosion, 0, sizeof(explosion));
}

References explosion, and numexplosions.

Referenced by R_Explosion_Init().

r_explosion_shutdown()

static void r_explosion_shutdown ( void )

static

Definition at line 100 of file r_explosion.c.

{
    R_FreeTexturePool(&explosiontexturepool);
}

References explosiontexturepool, and R_FreeTexturePool().

Referenced by R_Explosion_Init().

r_explosion_start()

static void r_explosion_start ( void )

static

Definition at line 63 of file r_explosion.c.

{
    int x, y;
    static unsigned char noise1[128][128], noise2[128][128], noise3[128][128], data[128][128][4];
    explosiontexturepool = R_AllocTexturePool();
    explosiontexture = NULL;
    //explosiontexturefog = NULL;
    fractalnoise(&noise1[0][0], 128, 32);
    fractalnoise(&noise2[0][0], 128, 4);
    fractalnoise(&noise3[0][0], 128, 4);
    for (y = 0;y < 128;y++)
    {
        for (x = 0;x < 128;x++)
        {
            int j, r, g, b, a;
            j = (noise1[y][x] * noise2[y][x]) * 3 / 256 - 128;
            r = (j * 512) / 256;
            g = (j * 256) / 256;
            b = (j * 128) / 256;
            a = noise3[y][x] * 3 - 128;
            data[y][x][2] = bound(0, r, 255);
            data[y][x][1] = bound(0, g, 255);
            data[y][x][0] = bound(0, b, 255);
            data[y][x][3] = bound(0, a, 255);
        }
    }
    explosiontexture = R_LoadTexture2D(explosiontexturepool, "explosiontexture", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, -1, NULL);
//  if (r_loadfog)
//  {
//      for (y = 0;y < 128;y++)
//          for (x = 0;x < 128;x++)
//              data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
//      explosiontexturefog = R_LoadTexture2D(explosiontexturepool, "explosiontexture_fog", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, NULL);
//  }
    // note that explosions survive the restart
}

References a, b, bound, data, explosiontexture, explosiontexturepool, fractalnoise(), g, noise1, noise2, noise3, NULL, r, R_AllocTexturePool(), R_LoadTexture2D(), TEXF_ALPHA, TEXF_FORCELINEAR, TEXF_MIPMAP, TEXTYPE_BGRA, x, and y.

Referenced by R_Explosion_Init().

R_ExplosionVert()

static int R_ExplosionVert ( int column, int row )

static

Definition at line 111 of file r_explosion.c.

{
    int i;
    float yaw, pitch;
    // top and bottom rows are all one position...
    if (row == 0 || row == EXPLOSIONGRID)
        column = 0;
    i = row * (EXPLOSIONGRID + 1) + column;
    yaw = ((double) column / EXPLOSIONGRID) * M_PI * 2;
    pitch = (((double) row / EXPLOSIONGRID) - 0.5) * M_PI;
    explosionpoint[i][0] = cos(yaw) *  cos(pitch);
    explosionpoint[i][1] = sin(yaw) *  cos(pitch);
    explosionpoint[i][2] =        1 * -sin(pitch);
    explosiontexcoord2f[i][0] = (float) column / (float) EXPLOSIONGRID;
    explosiontexcoord2f[i][1] = (float) row / (float) EXPLOSIONGRID;
    explosionnoiseindex[i] = (row % EXPLOSIONGRID) * EXPLOSIONGRID + (column % EXPLOSIONGRID);
    return i;
}

References cos(), EXPLOSIONGRID, explosionnoiseindex, explosionpoint, explosiontexcoord2f, float, i, M_PI, and sin().

Referenced by R_Explosion_Init().

R_MoveExplosion()

static void R_MoveExplosion ( explosion_t * e )

static

Definition at line 227 of file r_explosion.c.

{
    int i;
    float dot, end[3], frametime;
    trace_t trace;
 
    frametime = cl.time - e->time;
    e->time = cl.time;
    e->alpha = e->alpha - (e->fade * frametime);
    if (e->alpha < 0 || cl.time > e->endtime)
    {
        e->alpha = 0;
        return;
    }
    for (i = 0;i < EXPLOSIONVERTS;i++)
    {
        if (e->vertvel[i][0] || e->vertvel[i][1] || e->vertvel[i][2])
        {
            VectorMA(e->vert[i], frametime, e->vertvel[i], end);
            if (e->clipping)
            {
                trace = CL_TraceLine(e->vert[i], end, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value, true, false, NULL, false, false);
                if (trace.fraction < 1)
                {
                    // clip velocity against the wall
                    dot = -DotProduct(e->vertvel[i], trace.plane.normal);
                    VectorMA(e->vertvel[i], dot, trace.plane.normal, e->vertvel[i]);
                }
                VectorCopy(trace.endpos, e->vert[i]);
            }
            else
                VectorCopy(end, e->vert[i]);
        }
    }
}

References explosion_t::alpha, cl, CL_TraceLine(), explosion_t::clipping, collision_extendmovelength, DotProduct, trace_t::endpos, explosion_t::endtime, EXPLOSIONVERTS, explosion_t::fade, trace_t::fraction, frametime, i, MOVE_NOMONSTERS, plane_t::normal, NULL, trace_t::plane, SUPERCONTENTS_SOLID, client_state_t::time, explosion_t::time, cvar_t::value, VectorCopy, VectorMA, explosion_t::vert, and explosion_t::vertvel.

Referenced by R_DrawExplosions().

R_NewExplosion()

void R_NewExplosion

(

const vec3_t

org

)

Definition at line 160 of file r_explosion.c.

{
#ifdef MAX_EXPLOSIONS
    int i, j;
    float dist, n;
    explosion_t *e;
    trace_t trace;
    unsigned char noise[EXPLOSIONGRID*EXPLOSIONGRID];
    fractalnoisequick(noise, EXPLOSIONGRID, 4); // adjust noise grid size according to explosion
    for (i = 0, e = explosion;i < MAX_EXPLOSIONS;i++, e++)
    {
        if (!e->alpha)
        {
            numexplosions = max(numexplosions, i + 1);
            e->starttime = cl.time;
            e->endtime = cl.time + cl_explosions_lifetime.value;
            e->time = e->starttime;
            e->alpha = cl_explosions_alpha_start.value;
            e->fade = (cl_explosions_alpha_start.value - cl_explosions_alpha_end.value) / cl_explosions_lifetime.value;
            e->clipping = r_explosionclip.integer != 0;
            VectorCopy(org, e->origin);
            for (j = 0;j < EXPLOSIONVERTS;j++)
            {
                // calculate start origin and velocity
                n = noise[explosionnoiseindex[j]] * (1.0f / 255.0f) + 0.5;
                dist = n * cl_explosions_size_start.value;
                VectorMA(e->origin, dist, explosionpoint[j], e->vert[j]);
                dist = n * (cl_explosions_size_end.value - cl_explosions_size_start.value) / cl_explosions_lifetime.value;
                VectorScale(explosionpoint[j], dist, e->vertvel[j]);
                // clip start origin
                if (e->clipping)
                {
                    trace = CL_TraceLine(e->origin, e->vert[j], MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value, true, false, NULL, false, false);
                    VectorCopy(trace.endpos, e->vert[i]);
                }
            }
            break;
        }
    }
#endif
}

References explosion_t::alpha, cl, cl_explosions_alpha_end, cl_explosions_alpha_start, cl_explosions_lifetime, cl_explosions_size_end, cl_explosions_size_start, CL_TraceLine(), explosion_t::clipping, collision_extendmovelength, trace_t::endpos, explosion_t::endtime, explosion, EXPLOSIONGRID, explosionnoiseindex, explosionpoint, EXPLOSIONVERTS, explosion_t::fade, fractalnoisequick(), i, cvar_t::integer, max, MAX_EXPLOSIONS, MOVE_NOMONSTERS, n, noise, NULL, numexplosions, explosion_t::origin, r_explosionclip, explosion_t::starttime, SUPERCONTENTS_SOLID, client_state_t::time, explosion_t::time, cvar_t::value, VectorCopy, VectorMA, VectorScale, explosion_t::vert, and explosion_t::vertvel.

Referenced by CL_ParticleExplosion().

Variable Documentation

explosion

explosion_t explosion[MAX_EXPLOSIONS]

static

Definition at line 50 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback(), R_DrawExplosions(), r_explosion_newmap(), and R_NewExplosion().

explosionnoiseindex

int explosionnoiseindex[EXPLOSIONVERTS]

static

Definition at line 33 of file r_explosion.c.

Referenced by R_ExplosionVert(), and R_NewExplosion().

explosionpoint

vec3_t explosionpoint[EXPLOSIONVERTS]

static

Definition at line 34 of file r_explosion.c.

Referenced by R_ExplosionVert(), and R_NewExplosion().

explosiontexcoord2f

float explosiontexcoord2f[EXPLOSIONVERTS][2]

static

Definition at line 31 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback(), and R_ExplosionVert().

explosiontexture

rtexture_t* explosiontexture

static

Definition at line 52 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback(), and r_explosion_start().

explosiontexturepool

rtexturepool_t* explosiontexturepool

static

Definition at line 55 of file r_explosion.c.

Referenced by r_explosion_shutdown(), and r_explosion_start().

explosiontris

unsigned short explosiontris[EXPLOSIONTRIS][3]

static

Definition at line 32 of file r_explosion.c.

Referenced by R_DrawExplosion_TransparentCallback(), and R_Explosion_Init().

numexplosions

int numexplosions = 0

static

Definition at line 29 of file r_explosion.c.

Referenced by R_DrawExplosions(), r_explosion_newmap(), and R_NewExplosion().

r_drawexplosions

cvar_t r_drawexplosions = {CF_CLIENT, "r_drawexplosions", "1", "enables rendering of explosion shells (see also cl_particles_explosions_shell)"}

static

Definition at line 60 of file r_explosion.c.

{CF_CLIENT, "r_drawexplosions", "1", "enables rendering of explosion shells (see also cl_particles_explosions_shell)"};

Referenced by R_DrawExplosions(), and R_Explosion_Init().

r_explosionclip

cvar_t r_explosionclip = {CF_CLIENT | CF_ARCHIVE, "r_explosionclip", "1", "enables collision detection for explosion shell (so that it flattens against walls and floors)"}

Definition at line 58 of file r_explosion.c.

{CF_CLIENT | CF_ARCHIVE, "r_explosionclip", "1", "enables collision detection for explosion shell (so that it flattens against walls and floors)"};

Referenced by M_Menu_Options_Effects_AdjustSliders(), M_Options_Effects_Draw(), R_Explosion_Init(), and R_NewExplosion().