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gl_rsurf.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.
*/
// r_surf.c: surface-related refresh code
#include "quakedef.h"
#include "gl_model.h"
#include "gl_local.h"
#include "rulesets.h"
#include "utils.h"
#define BLOCK_WIDTH 128
#define BLOCK_HEIGHT 128
#define MAX_LIGHTMAP_SIZE (32 * 32) // it was 4096 for quite long time
int lightmap_textures;
static unsigned blocklights[MAX_LIGHTMAP_SIZE * 3];
typedef struct glRect_s {
unsigned char l, t, w, h;
} glRect_t;
static glpoly_t *lightmap_polys[MAX_LIGHTMAPS];
static qbool lightmap_modified[MAX_LIGHTMAPS];
static glRect_t lightmap_rectchange[MAX_LIGHTMAPS];
static int allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
static int last_lightmap_updated;
// the lightmap texture data needs to be kept in
// main memory so texsubimage can update properly
byte lightmaps[3 * MAX_LIGHTMAPS * BLOCK_WIDTH * BLOCK_HEIGHT];
static qbool gl_invlightmaps = true;
msurface_t *skychain = NULL;
msurface_t **skychain_tail = &skychain;
msurface_t *waterchain = NULL;
msurface_t **waterchain_tail = &waterchain;
msurface_t *alphachain = NULL;
msurface_t **alphachain_tail = &alphachain;
#define CHAIN_SURF_F2B(surf, chain_tail) \
{ \
*(chain_tail) = (surf); \
(chain_tail) = &(surf)->texturechain; \
(surf)->texturechain = NULL; \
}
#define CHAIN_SURF_B2F(surf, chain) \
{ \
(surf)->texturechain = (chain); \
(chain) = (surf); \
}
glpoly_t *fullbright_polys[MAX_GLTEXTURES];
glpoly_t *luma_polys[MAX_GLTEXTURES];
qbool drawfullbrights = false, drawlumas = false;
glpoly_t *caustics_polys = NULL;
glpoly_t *detail_polys = NULL;
extern cvar_t gl_textureless; //Qrack
void DrawGLPoly (glpoly_t *p);
void R_DrawFlat (model_t *model);
// mark all surfaces so ALL light maps will reload in R_RenderDynamicLightmaps()
static void R_ForceReloadLightMaps(void)
{
model_t *m;
int i, j;
Com_DPrintf("forcing of reloading all light maps!\n");
for (j = 1; j < MAX_MODELS; j++)
{
if (!(m = cl.model_precache[j]))
break;
if (m->name[0] == '*')
continue;
for (i = 0; i < m->numsurfaces; i++)
{
m->surfaces[i].cached_dlight = true; // kinda hack, so we force reload light map
}
}
}
qbool R_FullBrightAllowed(void)
{
return r_fullbright.value && r_refdef2.allow_cheats;
}
void R_Check_R_FullBright(void)
{
static qbool allowed;
// not changed, nothing to do
if( allowed == R_FullBrightAllowed() )
return;
// ok, it changed, lets update all our light maps...
allowed = R_FullBrightAllowed();
R_ForceReloadLightMaps();
}
void R_RenderFullbrights (void) {
int i;
glpoly_t *p;
if (!drawfullbrights)
return;
glDepthMask (GL_FALSE); // don't bother writing Z
glEnable(GL_ALPHA_TEST);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
for (i = 1; i < MAX_GLTEXTURES; i++) {
if (!fullbright_polys[i])
continue;
GL_Bind (i);
for (p = fullbright_polys[i]; p; p = p->fb_chain)
DrawGLPoly (p);
fullbright_polys[i] = NULL;
}
glDisable(GL_ALPHA_TEST);
glDepthMask (GL_TRUE);
drawfullbrights = false;
}
void R_RenderLumas (void) {
int i;
glpoly_t *p;
if (!drawlumas)
return;
glDepthMask (GL_FALSE); // don't bother writing Z
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
for (i = 1; i < MAX_GLTEXTURES; i++) {
if (!luma_polys[i])
continue;
GL_Bind (i);
for (p = luma_polys[i]; p; p = p->luma_chain)
DrawGLPoly (p);
luma_polys[i] = NULL;
}
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask (GL_TRUE);
drawlumas = false;
}
void EmitDetailPolys (void) {
glpoly_t *p;
int i;
float *v;
if (!detail_polys)
return;
GL_Bind(detailtexture);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glBlendFunc(GL_DST_COLOR, GL_SRC_COLOR);
glEnable(GL_BLEND);
for (p = detail_polys; p; p = p->detail_chain) {
glBegin(GL_POLYGON);
v = p->verts[0];
for (i = 0; i < p->numverts; i++, v += VERTEXSIZE) {
glTexCoord2f (v[7] * 18, v[8] * 18);
glVertex3fv (v);
}
glEnd();
}
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_BLEND);
detail_polys = NULL;
}
typedef struct dlightinfo_s {
int local[2];
int rad;
int minlight; // rad - minlight
int lnum; // reference to cl_dlights[]
} dlightinfo_t;
static dlightinfo_t dlightlist[MAX_DLIGHTS];
static int numdlights;
void R_BuildDlightList (msurface_t *surf) {
float dist;
vec3_t impact;
mtexinfo_t *tex;
int lnum, i, smax, tmax, irad, iminlight, local[2], tdmin, sdmin, distmin;
dlightinfo_t *light;
numdlights = 0;
smax = (surf->extents[0]>>4)+1;
tmax = (surf->extents[1]>>4)+1;
tex = surf->texinfo;
for (lnum = 0; lnum < MAX_DLIGHTS; lnum++) {
if ( !(surf->dlightbits & (1 << lnum) ) )
continue; // not lit by this light
dist = PlaneDiff(cl_dlights[lnum].origin, surf->plane);
irad = (cl_dlights[lnum].radius - fabs(dist)) * 256;
iminlight = cl_dlights[lnum].minlight * 256;
if (irad < iminlight)
continue;
iminlight = irad - iminlight;
for (i = 0; i < 3; i++)
impact[i] = cl_dlights[lnum].origin[i] - surf->plane->normal[i] * dist;
local[0] = DotProduct (impact, tex->vecs[0]) + tex->vecs[0][3] - surf->texturemins[0];
local[1] = DotProduct (impact, tex->vecs[1]) + tex->vecs[1][3] - surf->texturemins[1];
// check if this dlight will touch the surface
if (local[1] > 0) {
tdmin = local[1] - (tmax << 4);
if (tdmin < 0)
tdmin = 0;
} else {
tdmin = -local[1];
}
if (local[0] > 0) {
sdmin = local[0] - (smax << 4);
if (sdmin < 0)
sdmin = 0;
} else {
sdmin = -local[0];
}
if (sdmin > tdmin)
distmin = (sdmin << 8) + (tdmin << 7);
else
distmin = (tdmin << 8) + (sdmin << 7);
if (distmin < iminlight) {
// save dlight info
light = &dlightlist[numdlights];
light->minlight = iminlight;
light->rad = irad;
light->local[0] = local[0];
light->local[1] = local[1];
light->lnum = lnum;
numdlights++;
}
}
}
// funny, but this colors differ from bubblecolor[NUM_DLIGHTTYPES][4]
int dlightcolor[NUM_DLIGHTTYPES][3] = {
{ 100, 90, 80 }, // dimlight or brightlight
{ 100, 50, 10 }, // muzzleflash
{ 100, 50, 10 }, // explosion
{ 90, 60, 7 }, // rocket
{ 128, 0, 0 }, // red
{ 0, 0, 128 }, // blue
{ 128, 0, 128 }, // red + blue
{ 0, 128, 0 }, // green
{ 128, 128, 0 }, // red + green
{ 0, 128, 128 }, // blue + green
{ 128, 128, 128 }, // white
{ 128, 128, 128 }, // custom
};
//R_BuildDlightList must be called first!
void R_AddDynamicLights (msurface_t *surf) {
int i, smax, tmax, s, t, sd, td, _sd, _td, irad, idist, iminlight, color[3], tmp;
dlightinfo_t *light;
unsigned *dest;
smax = (surf->extents[0]>>4)+1;
tmax = (surf->extents[1]>>4)+1;
for (i = 0, light = dlightlist; i < numdlights; i++, light++) {
extern cvar_t gl_colorlights;
if (gl_colorlights.value) {
if (cl_dlights[light->lnum].type == lt_custom)
VectorCopy(cl_dlights[light->lnum].color, color);
else
VectorCopy(dlightcolor[cl_dlights[light->lnum].type], color);
} else {
VectorSet(color, 128, 128, 128);
}
irad = light->rad;
iminlight = light->minlight;
_td = light->local[1];
dest = blocklights;
for (t = 0; t < tmax; t++) {
td = _td;
if (td < 0) td = -td;
_td -= 16;
_sd = light->local[0];
for (s = 0; s < smax; s++) {
sd = _sd < 0 ? -_sd : _sd;
_sd -= 16;
if (sd > td)
idist = (sd << 8) + (td << 7);
else
idist = (td << 8) + (sd << 7);
if (idist < iminlight) {
tmp = (irad - idist) >> 7;
dest[0] += tmp * color[0];
dest[1] += tmp * color[1];
dest[2] += tmp * color[2];
}
dest += 3;
}
}
}
}
//Combine and scale multiple lightmaps into the 8.8 format in blocklights
void R_BuildLightMap (msurface_t *surf, byte *dest, int stride) {
int smax, tmax, i, j, size, blocksize, maps;
byte *lightmap;
unsigned scale, *bl;
qbool fullbright = false;
surf->cached_dlight = !!numdlights;
smax = (surf->extents[0] >> 4) + 1;
tmax = (surf->extents[1] >> 4) + 1;
size = smax * tmax;
blocksize = size * 3;
lightmap = surf->samples;
// check for full bright or no light data
fullbright = (R_FullBrightAllowed() || !cl.worldmodel->lightdata);
if (fullbright)
{ // set to full bright
for (i = 0; i < blocksize; i++)
blocklights[i] = 255 << 8;
}
else
{
// clear to no light
memset (blocklights, 0, blocksize * sizeof(int));
}
// add all the lightmaps
for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255; maps++)
{
scale = d_lightstylevalue[surf->styles[maps]];
surf->cached_light[maps] = scale; // 8.8 fraction
if (!fullbright && lightmap)
{
bl = blocklights;
for (i = 0; i < blocksize; i++)
*bl++ += lightmap[i] * scale;
lightmap += blocksize; // skip to next lightmap
}
}
// add all the dynamic lights
if (!fullbright)
{
if (numdlights)
R_AddDynamicLights (surf);
}
// bound, invert, and shift
bl = blocklights;
stride -= smax * 3;
for (i = 0; i < tmax; i++, dest += stride) {
scale = (lightmode == 2) ? (int)(256 * 1.5) : 256 * 2;
scale *= bound(0.5, gl_modulate.value, 3);
for (j = smax; j; j--) {
unsigned r, g, b, m;
r = bl[0] * scale;
g = bl[1] * scale;
b = bl[2] * scale;
m = max(r, g);
m = max(m, b);
if (m > ((255<<16) + (1<<15))) {
unsigned s = (((255<<16) + (1<<15)) << 8) / m;
r = (r >> 8) * s;
g = (g >> 8) * s;
b = (b >> 8) * s;
}
if (gl_invlightmaps) {
dest[0] = 255 - (r >> 16);
dest[1] = 255 - (g >> 16);
dest[2] = 255 - (b >> 16);
} else {
dest[0] = r >> 16;
dest[1] = g >> 16;
dest[2] = b >> 16;
}
bl += 3;
dest += 3;
}
}
}
void R_UploadLightMap (int lightmapnum) {
glRect_t *theRect;
lightmap_modified[lightmapnum] = false;
theRect = &lightmap_rectchange[lightmapnum];
glTexSubImage2D (GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, GL_RGB, GL_UNSIGNED_BYTE,
lightmaps + (lightmapnum * BLOCK_HEIGHT + theRect->t) * BLOCK_WIDTH * 3);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
//Returns the proper texture for a given time and base texture
texture_t *R_TextureAnimation (texture_t *base) {
int relative, count;
if (currententity->frame) {
if (base->alternate_anims)
base = base->alternate_anims;
}
if (!base->anim_total)
return base;
relative = (int) (r_refdef2.time * 10) % base->anim_total;
count = 0;
while (base->anim_min > relative || base->anim_max <= relative) {
base = base->anim_next;
if (!base)
Host_Error ("R_TextureAnimation: broken cycle");
if (++count > 100)
Host_Error ("R_TextureAnimation: infinite cycle");
}
return base;
}
void DrawGLPoly (glpoly_t *p) {
int i;
float *v;
glBegin (GL_POLYGON);
v = p->verts[0];
for (i = 0; i < p->numverts; i++, v+= VERTEXSIZE) {
glTexCoord2f (v[3], v[4]);
glVertex3fv (v);
}
glEnd ();
}
void R_BlendLightmaps (void) {
int i, j;
glpoly_t *p;
float *v;
// if (R_FullBrightAllowed())
// return;
glDepthMask (GL_FALSE); // don't bother writing Z
if (gl_invlightmaps)
glBlendFunc (GL_ZERO, GL_ONE_MINUS_SRC_COLOR);
else
glBlendFunc (GL_ZERO, GL_SRC_COLOR);
if (!(r_lightmap.value && r_refdef2.allow_cheats))
glEnable (GL_BLEND);
for (i = 0; i < MAX_LIGHTMAPS; i++) {
if (!(p = lightmap_polys[i]))
continue;
GL_Bind(lightmap_textures + i);
if (lightmap_modified[i])
R_UploadLightMap (i);
for ( ; p; p = p->chain) {
glBegin (GL_POLYGON);
v = p->verts[0];
for (j = 0; j < p->numverts; j++, v+= VERTEXSIZE) {
glTexCoord2f (v[5], v[6]);
glVertex3fv (v);
}
glEnd ();
}
lightmap_polys[i] = NULL;
}
glDisable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask (GL_TRUE); // back to normal Z buffering
}
void R_RenderDynamicLightmaps (msurface_t *fa) {
byte *base;
int maps, smax, tmax;
glRect_t *theRect;
qbool lightstyle_modified = false;
c_brush_polys++;
if (!r_dynamic.value)
return;
// check for lightmap modification
for (maps = 0; maps < MAXLIGHTMAPS && fa->styles[maps] != 255; maps++) {
if (d_lightstylevalue[fa->styles[maps]] != fa->cached_light[maps]) {
lightstyle_modified = true;
break;
}
}
if (fa->dlightframe == r_framecount)
R_BuildDlightList (fa);
else
numdlights = 0;
if (numdlights == 0 && !fa->cached_dlight && !lightstyle_modified)
return;
lightmap_modified[fa->lightmaptexturenum] = true;
theRect = &lightmap_rectchange[fa->lightmaptexturenum];
if (fa->light_t < theRect->t) {
if (theRect->h)
theRect->h += theRect->t - fa->light_t;
theRect->t = fa->light_t;
}
if (fa->light_s < theRect->l) {
if (theRect->w)
theRect->w += theRect->l - fa->light_s;
theRect->l = fa->light_s;
}
smax = (fa->extents[0] >> 4) + 1;
tmax = (fa->extents[1] >> 4) + 1;
if (theRect->w + theRect->l < fa->light_s + smax)
theRect->w = fa->light_s - theRect->l + smax;
if (theRect->h + theRect->t < fa->light_t + tmax)
theRect->h = fa->light_t - theRect->t + tmax;
base = lightmaps + fa->lightmaptexturenum * BLOCK_WIDTH * BLOCK_HEIGHT * 3;
base += (fa->light_t * BLOCK_WIDTH + fa->light_s) * 3;
R_BuildLightMap (fa, base, BLOCK_WIDTH * 3);
}
void R_DrawWaterSurfaces (void) {
msurface_t *s;
float wateralpha;
//Tei particle surf
#define ESHADER(eshadername) extern void eshadername (vec3_t org)
extern void EmitParticleEffect (msurface_t *fa, void (*fun)(vec3_t nv)) ;
extern cvar_t tei_lavafire, tei_slime;
ESHADER(FuelRodExplosion);//green mushroom explosion
ESHADER(ParticleFire);//torch fire
ESHADER(ParticleFirePool);//lavapool alike fire
ESHADER(VX_DeathEffect);//big white spark explosion
ESHADER(VX_GibEffect);//huge red blood cloud
ESHADER(VX_DetpackExplosion);//cool huge explosion
ESHADER(VX_Implosion);//TODO
ESHADER(VX_TeslaCharge);
ESHADER(ParticleSlime);
ESHADER(ParticleSlimeHarcore);
ESHADER(ParticleBloodPool);
ESHADER(ParticleSlimeBubbles); //HyperNewbie particles init
ESHADER(ParticleSlimeGlow);
ESHADER(ParticleSmallerFirePool);
ESHADER(ParticleLavaSmokePool);
if (!waterchain)
return;
wateralpha = bound((1 - r_refdef2.max_watervis), r_wateralpha.value, 1);
if (wateralpha < 1.0) {
glEnable (GL_BLEND);
glColor4f (1, 1, 1, wateralpha);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
if (wateralpha < 0.9)
glDepthMask (GL_FALSE);
}
GL_DisableMultitexture();
for (s = waterchain; s; s = s->texturechain) {
GL_Bind (s->texinfo->texture->gl_texturenum);
EmitWaterPolys (s);
//Tei "eshaders".
if (s &&s->texinfo && s->texinfo->texture && s->texinfo->texture->name )
{
switch(s->texinfo->texture->name[1])
{
//Lava
case 'l':
case 'L':
if (tei_lavafire.value == 1)
{
EmitParticleEffect(s,ParticleFire);//Tei lavafire, normal
}
else
if (tei_lavafire.value == 2)
{
EmitParticleEffect(s,ParticleFirePool);//Tei lavafire HARDCORE
EmitParticleEffect(s,ParticleBloodPool);//Tei redblood smoke
}
else
if(tei_lavafire.value == 3) //HyperNewbie's smokefire
{
EmitParticleEffect(s,ParticleSmallerFirePool);
EmitParticleEffect(s,ParticleLavaSmokePool);
}
else
if(tei_lavafire.value == 4) //HyperNewbie's super smokefire
{
EmitParticleEffect(s,ParticleSmallerFirePool);
EmitParticleEffect(s,ParticleLavaSmokePool);
EmitParticleEffect(s,ParticleLavaSmokePool);
EmitParticleEffect(s,ParticleLavaSmokePool);
}
//else, use wheater effect :)
break;
case 't':
//TODO: a cool implosion subtel fx
// EmitParticleEffect(s,VX_Implosion);//Teleport
break;
case 's':
if (tei_slime.value == 1)
EmitParticleEffect(s,ParticleSlime);
else
if (tei_slime.value == 2)
EmitParticleEffect(s,ParticleSlimeHarcore);
else
if (tei_slime.value == 3) {
if(!(rand() % 40)) EmitParticleEffect(s,ParticleSlimeGlow);
if(!(rand() % 40)) EmitParticleEffect(s,ParticleSlimeBubbles);
} else
if (tei_slime.value == 4) {
if(!(rand() % 10)) EmitParticleEffect(s,ParticleSlimeGlow);
if(!(rand() % 10)) EmitParticleEffect(s,ParticleSlimeBubbles);
}
break;
case 'w':
// EmitParticleEffect(s,VX_TeslaCharge);
break;
default:
break;
}
}
}
waterchain = NULL;
waterchain_tail = &waterchain;
if (wateralpha < 1.0) {
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glColor3ubv (color_white);
glDisable (GL_BLEND);
if (wateralpha < 0.9)
glDepthMask (GL_TRUE);
}
}
//draws transparent textures for HL world and nonworld models
void R_DrawAlphaChain (void) {
int k;
msurface_t *s;
texture_t *t;
float *v;
if (!alphachain)
return;
glEnable(GL_ALPHA_TEST);
for (s = alphachain; s; s = s->texturechain) {
t = s->texinfo->texture;
R_RenderDynamicLightmaps (s);
//bind the world texture
GL_DisableMultitexture();
GL_Bind (t->gl_texturenum);
if (gl_mtexable) {
//bind the lightmap texture
GL_EnableMultitexture();
GL_Bind (lightmap_textures + s->lightmaptexturenum);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, gl_invlightmaps ? GL_BLEND : GL_MODULATE);
//update lightmap if its modified by dynamic lights
k = s->lightmaptexturenum;
if (lightmap_modified[k])
R_UploadLightMap(k);
}
glBegin(GL_POLYGON);
v = s->polys->verts[0];
for (k = 0; k < s->polys->numverts; k++, v += VERTEXSIZE) {
if (gl_mtexable) {
qglMultiTexCoord2f (GL_TEXTURE0_ARB, v[3], v[4]);
qglMultiTexCoord2f (GL_TEXTURE1_ARB, v[5], v[6]);
} else {
glTexCoord2f (v[3], v[4]);
}
glVertex3fv (v);
}
glEnd ();
}
alphachain = NULL;
glDisable(GL_ALPHA_TEST);
GL_DisableMultitexture();
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
#define CHAIN_RESET(chain) \
{ \
chain = NULL; \
chain##_tail = &chain; \
}
static void R_ClearTextureChains(model_t *clmodel) {
int i, waterline;
texture_t *texture;
memset (lightmap_polys, 0, sizeof(lightmap_polys));
memset (fullbright_polys, 0, sizeof(fullbright_polys));
memset (luma_polys, 0, sizeof(luma_polys));
for (i = 0; i < clmodel->numtextures; i++) {
for (waterline = 0; waterline < 2; waterline++) {
if ((texture = clmodel->textures[i])) {
texture->texturechain[waterline] = NULL;
texture->texturechain_tail[waterline] = &texture->texturechain[waterline];
}
}
}
r_notexture_mip->texturechain[0] = NULL;
r_notexture_mip->texturechain_tail[0] = &r_notexture_mip->texturechain[0];
r_notexture_mip->texturechain[1] = NULL;
r_notexture_mip->texturechain_tail[1] = &r_notexture_mip->texturechain[1];
CHAIN_RESET(skychain);
if (clmodel == cl.worldmodel)
CHAIN_RESET(waterchain);
CHAIN_RESET(alphachain);
}
void DrawTextureChains (model_t *model, int contents)
{
extern cvar_t gl_lumaTextures;
int waterline, i, k, GL_LIGHTMAP_TEXTURE = 0, GL_FB_TEXTURE = 0, fb_texturenum;
msurface_t *s;
texture_t *t;
float *v;
qbool render_lightmaps = false;
qbool doMtex1, doMtex2;
qbool isLumaTexture;
qbool draw_fbs, draw_caustics, draw_details;
qbool can_mtex_lightmaps, can_mtex_fbs;
qbool draw_mtex_fbs;
qbool mtex_lightmaps, mtex_fbs;
draw_caustics = underwatertexture && gl_caustics.value;
draw_details = detailtexture && gl_detail.value;
if (gl_fb_bmodels.value)
{
can_mtex_lightmaps = gl_mtexable;
can_mtex_fbs = gl_textureunits >= 3;
}
else
{
can_mtex_lightmaps = gl_textureunits >= 3;
can_mtex_fbs = gl_textureunits >= 3 && gl_add_ext;
}
GL_DisableMultitexture();
if (gl_fogenable.value)
glEnable(GL_FOG);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
for (i = 0; i < model->numtextures; i++)
{
if (!model->textures[i] || (!model->textures[i]->texturechain[0] && !model->textures[i]->texturechain[1]))
continue;
t = R_TextureAnimation (model->textures[i]);
if (t->isLumaTexture)
{
isLumaTexture = gl_lumaTextures.value && r_refdef2.allow_lumas;
fb_texturenum = isLumaTexture ? t->fb_texturenum : 0;
}
else
{
isLumaTexture = false;
fb_texturenum = t->fb_texturenum;
}
//bind the world texture
GL_SelectTexture(GL_TEXTURE0_ARB);
GL_Bind (t->gl_texturenum);
draw_fbs = gl_fb_bmodels.value /* || isLumaTexture */;
draw_mtex_fbs = draw_fbs && can_mtex_fbs;
if (gl_mtexable)
{
if (isLumaTexture && !gl_fb_bmodels.value)
{
if (gl_add_ext)
{
doMtex1 = true;
GL_EnableTMU(GL_TEXTURE1_ARB);
GL_FB_TEXTURE = GL_TEXTURE1_ARB;
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
GL_Bind (fb_texturenum);
mtex_lightmaps = can_mtex_lightmaps;
mtex_fbs = true;
if (mtex_lightmaps)
{
doMtex2 = true;
GL_LIGHTMAP_TEXTURE = GL_TEXTURE2_ARB;
GL_EnableTMU(GL_LIGHTMAP_TEXTURE);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, gl_invlightmaps ? GL_BLEND : GL_MODULATE);
}
else
{
doMtex2 = false;
render_lightmaps = true;
}
}
else
{
GL_DisableTMU(GL_TEXTURE1_ARB);
render_lightmaps = true;
doMtex1 = doMtex2 = mtex_lightmaps = mtex_fbs = false;
}
}
else
{
doMtex1 = true;
GL_EnableTMU(GL_TEXTURE1_ARB);
GL_LIGHTMAP_TEXTURE = GL_TEXTURE1_ARB;
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, gl_invlightmaps ? GL_BLEND : GL_MODULATE);
mtex_lightmaps = true;
mtex_fbs = fb_texturenum && draw_mtex_fbs;
if (mtex_fbs)
{
doMtex2 = true;
GL_FB_TEXTURE = GL_TEXTURE2_ARB;
GL_EnableTMU(GL_FB_TEXTURE);
GL_Bind (fb_texturenum);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, isLumaTexture ? GL_ADD : GL_DECAL);
}
else
{
doMtex2 = false;
}
}
}
else
{
render_lightmaps = true;
doMtex1 = doMtex2 = mtex_lightmaps = mtex_fbs = false;
}
for (waterline = 0; waterline < 2; waterline++)
{
if (!(s = model->textures[i]->texturechain[waterline]))
continue;
for ( ; s; s = s->texturechain)
{
if (mtex_lightmaps)
{
//bind the lightmap texture
GL_SelectTexture(GL_LIGHTMAP_TEXTURE);
GL_Bind (lightmap_textures + s->lightmaptexturenum);
//update lightmap if its modified by dynamic lights
R_RenderDynamicLightmaps (s);
k = s->lightmaptexturenum;
if (lightmap_modified[k])
R_UploadLightMap(k);
}
else
{
s->polys->chain = lightmap_polys[s->lightmaptexturenum];
lightmap_polys[s->lightmaptexturenum] = s->polys;
R_RenderDynamicLightmaps (s);
}
glBegin (GL_POLYGON);
v = s->polys->verts[0];
if (!s->texinfo->flags & TEX_SPECIAL)
{
for (k = 0 ; k < s->polys->numverts ; k++, v += VERTEXSIZE)
{
if (doMtex1)
{
//Tei: textureless for the world brush models
if(gl_textureless.value && model->isworldmodel)
{ //Qrack
qglMultiTexCoord2f (GL_TEXTURE0_ARB, 0, 0);
if (mtex_lightmaps)
qglMultiTexCoord2f (GL_LIGHTMAP_TEXTURE, v[5], v[6]);
if (mtex_fbs)
qglMultiTexCoord2f (GL_TEXTURE2_ARB, 0, 0);
}
else
{
qglMultiTexCoord2f (GL_TEXTURE0_ARB, v[3], v[4]);
if (mtex_lightmaps)
qglMultiTexCoord2f (GL_LIGHTMAP_TEXTURE, v[5], v[6]);
if (mtex_fbs)
qglMultiTexCoord2f (GL_FB_TEXTURE, v[3], v[4]);
}
}
else
{
if(gl_textureless.value && model->isworldmodel) //Qrack
glTexCoord2f (0, 0);
else
glTexCoord2f (v[3], v[4]);
}
glVertex3fv (v);
}
}