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ew-engine/mq engine src/gl_rsurf.c

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as packaged 2006-10-08
2006-10-08 00:00:00 +00:00
/*
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 "bsp_render.h"
extern qboolean gl_mtexable;
int lightmap_textures;
int lightmap_bytes = 4;
int lightmap_format = GL_RGBA;
unsigned blocklights[18*18*3]; // Tomaz - Lit Support
int active_lightmaps;
glpoly_t *lightmap_polys[MAX_LIGHTMAPS];
qboolean lightmap_modified[MAX_LIGHTMAPS];
glRect_t lightmap_rectchange[MAX_LIGHTMAPS];
byte lightmaps[4*MAX_LIGHTMAPS*BLOCK_WIDTH*BLOCK_HEIGHT];
int allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
msurface_t *skychain = NULL;
msurface_t *waterchain = NULL;
/*
===============
R_AddDynamicLights
===============
*/
void R_AddDynamicLights (msurface_t *surf)
{
int lnum;
int sd, td;
float dist, rad, minlight;
vec3_t impact, local;
int s, t;
int i;
int smax, tmax;
mtexinfo_t *tex;
// Tomaz - Lit Support Begin
int cred, cgreen, cblue, brightness;
unsigned *bl;
// Tomaz - Lit Support End
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
rad = cl_dlights[lnum].radius;
dist = PlaneDiff (cl_dlights[lnum].origin, surf->plane);
rad -= fabs(dist);
minlight = cl_dlights[lnum].minlight;
if (rad < minlight)
continue;
minlight = rad - minlight;
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];
local[1] = DotProduct (impact, tex->vecs[1]) + tex->vecs[1][3];
local[0] -= surf->texturemins[0];
local[1] -= surf->texturemins[1];
// Tomaz - Lit Support Begin
bl = blocklights;
cred = (int)(cl_dlights[lnum].color[0] * 256.0f);
cgreen = (int)(cl_dlights[lnum].color[1] * 256.0f);
cblue = (int)(cl_dlights[lnum].color[2] * 256.0f);
// Tomaz - Lit Support End
for (t = 0 ; t<tmax ; t++)
{
td = local[1] - t*16;
if (td < 0)
td = -td;
for (s=0 ; s<smax ; s++)
{
sd = local[0] - s*16;
if (sd < 0)
sd = -sd;
if (sd > td)
dist = sd + (td>>1);
else
dist = td + (sd>>1);
if (dist < minlight)
// Tomaz - Lit Support Begin
{
brightness = rad - dist;
bl[0] += brightness * cred;
bl[1] += brightness * cgreen;
bl[2] += brightness * cblue;
}
bl += 3;
// Tomaz - Lit Support End
}
}
}
}
/*
===============
R_BuildLightMap
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;
int t;
int i, j, size, blocksize;
byte *lightmap;
unsigned scale;
int maps;
unsigned *bl;
surf->cached_dlight = (surf->dlightframe == r_framecount);
smax = (surf->extents[0]>>4)+1;
tmax = (surf->extents[1]>>4)+1;
size = smax*tmax;
blocksize = size*3;
lightmap = surf->samples;
// set to full bright if no light data
if (!cl.worldmodel->lightdata)
{
// Tomaz - Lit Support Begin
memset (blocklights, 255, blocksize*sizeof(int));
// Tomaz - Lit Support End
goto store;
}
// clear to no light
// Tomaz - Lit Support Begin
memset (blocklights, 0, blocksize*sizeof(int));
// Tomaz - Lit Support End
// add all the lightmaps
if (lightmap)
for (maps = 0 ; maps < MAXLIGHTMAPS && surf->styles[maps] != 255 ;
maps++)
{
scale = d_lightstylevalue[surf->styles[maps]];
surf->cached_light[maps] = scale; // 8.8 fraction
// Tomaz - Lit Support Begin
bl = blocklights;
for (i=0 ; i<size ; i++)
{
bl[0] += lightmap[0] * scale;
bl[1] += lightmap[1] * scale;
bl[2] += lightmap[2] * scale;
bl += 3;
lightmap += 3;
}
// Tomaz - Lit Support End
}
// add all the dynamic lights
if (surf->dlightframe == r_framecount)
R_AddDynamicLights (surf);
// bound, invert, and shift
store:
bl = blocklights;
stride -= smax * lightmap_bytes;
for (i=0 ; i<tmax ; i++, dest += stride)
{
for (j=0 ; j<smax ; j++)
{
// Tomaz - Lit Support Begin
t = bl[0] >> 7;if (t > 255) t = 255;dest[0] = t;
t = bl[1] >> 7;if (t > 255) t = 255;dest[1] = t;
t = bl[2] >> 7;if (t > 255) t = 255;dest[2] = t;
if (lightmap_bytes > 3) dest[3] = 255;
bl += 3;
dest += lightmap_bytes;
// Tomaz - Lit Support End
}
}
}
/*
===============
R_TextureAnimation
Returns the proper texture for a given time and base texture
===============
*/
texture_t *R_TextureAnimation (texture_t *base)
{
int reletive;
int count;
if (currententity->frame)
{
if (base->alternate_anims)
base = base->alternate_anims;
}
if (!base->anim_total)
return base;
reletive = (int)(cl.time*10) % base->anim_total;
count = 0;
while (base->anim_min > reletive || base->anim_max <= reletive)
{
base = base->anim_next;
if (!base)
Sys_Error ("R_TextureAnimation: broken cycle");
if (++count > 100)
Sys_Error ("R_TextureAnimation: infinite cycle");
}
return base;
}
/*
=============================================================
BRUSH MODELS
=============================================================
*/
int oldtexture;
lpMTexFUNC qglMTexCoord2fSGIS_ARB = NULL;
lpSelTexFUNC qglSelectTextureSGIS_ARB = NULL;
#include "gl_rscript.h"
void R_DrawBrushMTexScript (msurface_t *s);
/*
====================
R_DrawBrushMTex
====================
*/
void R_DrawBrushMTex (msurface_t *s)
{
glpoly_t *p;
float *v;
int i;
texture_t *t;
glRect_t *theRect;
p = s->polys;
t = R_TextureAnimation (s->texinfo->texture);
if(t->rs)
{
R_DrawBrushMTexScript (s);
return;
}
glBindTexture (GL_TEXTURE_2D, t->gl_texturenum);
qglSelectTextureSGIS_ARB(TEXTURE1_SGIS_ARB);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable(GL_TEXTURE_2D);
glBindTexture (GL_TEXTURE_2D, lightmap_textures + s->lightmaptexturenum);
i = s->lightmaptexturenum;
if (lightmap_modified[i])
{
lightmap_modified[i] = false;
theRect = &lightmap_rectchange[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+(i* BLOCK_HEIGHT + theRect->t) *BLOCK_WIDTH*lightmap_bytes);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
glBegin(GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
qglMTexCoord2fSGIS_ARB (TEXTURE0_SGIS_ARB, v[3], v[4]);
qglMTexCoord2fSGIS_ARB (TEXTURE1_SGIS_ARB, v[5], v[6]);
glVertex3fv (v);
}
glEnd ();
glDisable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
qglSelectTextureSGIS_ARB(TEXTURE0_SGIS_ARB);
if (t->fullbrights != -1 && gl_fbr.value)
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture (GL_TEXTURE_2D, t->fullbrights);
p = s->polys;
v = p->verts[0];
glBegin (GL_POLYGON);
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
glTexCoord2f (v[3], v[4]);
glVertex3fv (v);
}
glEnd ();
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
}
int RS_AnimTexture(int rs);
/*
====================
R_DrawBrushMTexScript
====================
*/
void R_DrawBrushMTexScript (msurface_t *s)
{
glpoly_t *p;
float *v, vt[3], os, ot;
int i, rs;
texture_t *t;
glRect_t *theRect;
qboolean stage;
float txm, tym;
vec3_t nv;
p = s->polys;
t = R_TextureAnimation (s->texinfo->texture);
stage = true;
rs = t->rs;
while (stage)
{
if (!rscripts[rs].texexist)
glBindTexture (GL_TEXTURE_2D, t->gl_texturenum);
else if (!rscripts[rs].useanim)
glBindTexture (GL_TEXTURE_2D, rscripts[rs].texnum);
else
glBindTexture (GL_TEXTURE_2D, RS_AnimTexture(rs));
qglSelectTextureSGIS_ARB(TEXTURE1_SGIS_ARB);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glEnable(GL_TEXTURE_2D);
glBindTexture (GL_TEXTURE_2D, lightmap_textures + s->lightmaptexturenum);
i = s->lightmaptexturenum;
if (lightmap_modified[i])
{
lightmap_modified[i] = false;
theRect = &lightmap_rectchange[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+(i* BLOCK_HEIGHT + theRect->t) *BLOCK_WIDTH*lightmap_bytes);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBegin(GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
txm = 0;
tym = 0;
nv[0] = v[0];
nv[1] = v[1];
nv[2] = v[2];
vt[0] = v[3];
vt[1] = v[4];
if (rscripts[rs].usescroll)
{
txm = realtime*rscripts[rs].scroll.xspeed;
while (txm > 1 && (1-txm) > 0) txm=1-txm;
while (txm < 0 && (1+txm) > 1) txm=1+txm;
tym = realtime*rscripts[rs].scroll.yspeed;
while (tym > 1 && (1-tym) > 0) tym=1-tym;
while (tym < 0 && (1+tym) > 1) tym=1+tym;
}
if (rscripts[rs].useturb)
{
float power, movediv;
power = rscripts[rs].turb.power * 0.05; // Tomaz - Speed
movediv = rscripts[rs].turb.movediv;
os = v[3];
ot = v[4];
vt[0] = os + sin((os * 0.1 + realtime) * power) * sin((ot * 0.1 + realtime)) / movediv;
vt[1] = ot + sin((ot * 0.1 + realtime) * power) * sin((os * 0.1 + realtime)) / movediv;
}
if (rscripts[rs].usevturb)
{
float power;
power = rscripts[rs].vturb.power;
nv[0] = v[0] + sin(v[1] * 0.1 + realtime) * sin(v[2] * 0.1 + realtime) * power;
nv[1] = v[1] + sin(v[0] * 0.1 + realtime) * sin(v[2] * 0.1 + realtime) * power;
nv[2] = v[2];
}
qglMTexCoord2fSGIS_ARB (TEXTURE0_SGIS_ARB, vt[0]+txm, vt[1]+tym);
qglMTexCoord2fSGIS_ARB (TEXTURE1_SGIS_ARB, v[5], v[6]);
glVertex3fv (nv);
}
glEnd ();
glDisable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
qglSelectTextureSGIS_ARB(TEXTURE0_SGIS_ARB);
rs = rscripts[rs].nextstage;
if (!rs)
stage = false;
}
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
/*
================
R_DrawBrushNoMTex
================
*/
void R_DrawBrushNoMTex (msurface_t *s)
{
texture_t *t;
int i;
float *v;
glpoly_t *p;
int j;
glRect_t *theRect;
p = s->polys;
t = R_TextureAnimation (s->texinfo->texture);
glBindTexture (GL_TEXTURE_2D, t->gl_texturenum);
glBegin (GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
glTexCoord2f (v[3], v[4]);
glVertex3fv (v);
}
glEnd ();
glBindTexture (GL_TEXTURE_2D, lightmap_textures + s->lightmaptexturenum);
i = s->lightmaptexturenum;
if (lightmap_modified[i])
{
lightmap_modified[i] = false;
theRect = &lightmap_rectchange[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+(i* BLOCK_HEIGHT + theRect->t) *BLOCK_WIDTH*lightmap_bytes);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
glBlendFunc(GL_ZERO, GL_SRC_COLOR);
glBegin (GL_POLYGON);
v = p->verts[0];
for (j=0 ; j<p->numverts ; j++, v+= VERTEXSIZE)
{
glTexCoord2f (v[5], v[6]);
glVertex3fv (v);
}
glEnd ();
if (t->fullbrights != -1 && gl_fbr.value)
{
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR);
glBindTexture (GL_TEXTURE_2D, t->fullbrights);
p = s->polys;
v = p->verts[0];
glBegin (GL_POLYGON);
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
glTexCoord2f (v[3], v[4]);
glVertex3fv (v);
}
glEnd ();
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
/*
================
R_DrawBrushMTexTrans
================
*/
void R_DrawBrushMTexTrans (msurface_t *s, float alpha)
{
glpoly_t *p;
float *v;
int i;
texture_t *t;
glRect_t *theRect;
glColor4f (1,1,1,alpha);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
p = s->polys;
t = R_TextureAnimation (s->texinfo->texture);
glBindTexture (GL_TEXTURE_2D, t->gl_texturenum);
qglSelectTextureSGIS_ARB(TEXTURE1_SGIS_ARB);
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture (GL_TEXTURE_2D, lightmap_textures + s->lightmaptexturenum);
i = s->lightmaptexturenum;
if (lightmap_modified[i])
{
lightmap_modified[i] = false;
theRect = &lightmap_rectchange[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+(i* BLOCK_HEIGHT + theRect->t) *BLOCK_WIDTH*lightmap_bytes);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
glBegin(GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
qglMTexCoord2fSGIS_ARB (TEXTURE0_SGIS_ARB, v[3], v[4]);
qglMTexCoord2fSGIS_ARB (TEXTURE1_SGIS_ARB, v[5], v[6]);
glVertex3fv (v);
}
glEnd ();
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glDisable(GL_TEXTURE_2D);
qglSelectTextureSGIS_ARB(TEXTURE0_SGIS_ARB);
glColor4f (1,1,1,1);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
/*
================
R_DrawBrushNoMTexTrans
================
*/
void R_DrawBrushNoMTexTrans (msurface_t *s, float alpha)
{
texture_t *t;
int i;
float *v;
glpoly_t *p;
glRect_t *theRect;
glColor4f (1,1,1,alpha);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
p = s->polys;
t = R_TextureAnimation (s->texinfo->texture);
glBindTexture (GL_TEXTURE_2D, t->gl_texturenum);
glBegin (GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
glTexCoord2f (v[3], v[4]);
glVertex3fv (v);
}
glEnd ();
glBindTexture (GL_TEXTURE_2D, lightmap_textures + s->lightmaptexturenum);
i = s->lightmaptexturenum;
if (lightmap_modified[i])
{
lightmap_modified[i] = false;
theRect = &lightmap_rectchange[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, theRect->t, BLOCK_WIDTH, theRect->h, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+(i* BLOCK_HEIGHT + theRect->t) *BLOCK_WIDTH*lightmap_bytes);
theRect->l = BLOCK_WIDTH;
theRect->t = BLOCK_HEIGHT;
theRect->h = 0;
theRect->w = 0;
}
glBlendFunc(GL_ZERO, GL_SRC_COLOR);
glBegin (GL_POLYGON);
v = p->verts[0];
for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
{
glTexCoord2f (v[5], v[6]);
glVertex3fv (v);
}
glEnd ();
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f (1,1,1,1);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
/*
================
R_RenderDynamicLightmaps
Multitexture
================
*/
void R_RenderDynamicLightmaps (msurface_t *s)
{
byte *base;
int maps;
glRect_t *theRect;
int smax, tmax;
c_brush_polys++;
if (s->flags & (SURF_DRAWSKY | SURF_DRAWTURB ))
return;
s->polys->chain = lightmap_polys[s->lightmaptexturenum];
lightmap_polys[s->lightmaptexturenum] = s->polys;
// check for lightmap modification
for (maps = 0; maps < MAXLIGHTMAPS && s->styles[maps] != 255; maps++)
if (d_lightstylevalue[s->styles[maps]] != s->cached_light[maps])
goto dynamic;
if (s->dlightframe == r_framecount // dynamic this frame
|| s->cached_dlight) // dynamic previously
{
dynamic:
if (r_dynamic.value)
{
lightmap_modified[s->lightmaptexturenum] = true;
theRect = &lightmap_rectchange[s->lightmaptexturenum];
if (s->light_t < theRect->t)
{
if (theRect->h)
theRect->h += theRect->t - s->light_t;
theRect->t = s->light_t;
}
if (s->light_s < theRect->l)
{
if (theRect->w)
theRect->w += theRect->l - s->light_s;
theRect->l = s->light_s;
}
smax = (s->extents[0]>>4)+1;
tmax = (s->extents[1]>>4)+1;
if ((theRect->w + theRect->l) < (s->light_s + smax))
theRect->w = (s->light_s-theRect->l)+smax;
if ((theRect->h + theRect->t) < (s->light_t + tmax))
theRect->h = (s->light_t-theRect->t)+tmax;
base = lightmaps + s->lightmaptexturenum*lightmap_bytes*BLOCK_WIDTH*BLOCK_HEIGHT;
base += s->light_t * BLOCK_WIDTH * lightmap_bytes + s->light_s * lightmap_bytes;
R_BuildLightMap (s, base, BLOCK_WIDTH*lightmap_bytes);
}
}
}
/*
================
R_DrawWaterSurfaces
================
*/
void R_DrawWaterSurfaces (void)
{
msurface_t *s;
if (!waterchain)
return;
glLoadMatrixf (r_world_matrix);
for ( s = waterchain ; s ; s=s->texturechain)
{
glBindTexture (GL_TEXTURE_2D, s->texinfo->texture->gl_texturenum);
EmitWaterPolys (s);
}
waterchain = NULL;
}
float r_world_matrix[16];
/*
=================
R_SetupBrushPolys
=================
*/
void R_SetupBrushPolys (entity_t *e)
{
int k;
vec3_t mins, maxs;
int i;
msurface_t *psurf;
float dot;
mplane_t *pplane;
model_t *clmodel;
qboolean rotated;
clmodel = e->model;
if (e->angles[0] || e->angles[1] || e->angles[2])
{
rotated = true;
for (i=0 ; i<3 ; i++)
{
mins[i] = e->origin[i] - clmodel->radius;
maxs[i] = e->origin[i] + clmodel->radius;
}
}
else
{
rotated = false;
VectorAdd (e->origin, clmodel->mins, mins);
VectorAdd (e->origin, clmodel->maxs, maxs);
}
if (R_CullBox (mins, maxs))
return;
memset (lightmap_polys, 0, sizeof(lightmap_polys));
VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
if (rotated)
{
vec3_t temp;
vec3_t forward, right, up;
VectorCopy (modelorg, temp);
AngleVectors (e->angles, forward, right, up);
modelorg[0] = DotProduct (temp, forward);
modelorg[1] = -DotProduct (temp, right);
modelorg[2] = DotProduct (temp, up);
}
psurf = &clmodel->surfaces[clmodel->firstmodelsurface];
// calculate dynamic lighting for bmodel if it's not an
// instanced model
if (clmodel->firstmodelsurface != 0)
{
for (k=0 ; k<MAX_DLIGHTS ; k++)
{
if ((cl_dlights[k].die < cl.time) ||
(!cl_dlights[k].radius))
continue;
R_MarkLightsNoVis (&cl_dlights[k], 1<<k, clmodel->nodes + clmodel->hulls[0].firstclipnode);
}
}
glPushMatrix ();
glTranslatef (e->origin[0], e->origin[1], e->origin[2]);
glRotatef (e->angles[1], 0, 0, 1);
glRotatef (e->angles[0], 0, 1, 0); // stupid quake bug
glRotatef (e->angles[2], 1, 0, 0);
//
// draw texture
//
for (i=0 ; i<clmodel->nummodelsurfaces ; i++, psurf++)
{
// find which side of the node we are on
pplane = psurf->plane;
dot = PlaneDiff (modelorg, pplane);
// draw the polygon
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
{
if (gl_mtexable)
{
if ((e->alpha != 1) || (psurf->texinfo->texture->transparent))
R_DrawBrushMTexTrans (psurf, e->alpha);
else
R_DrawBrushMTex (psurf);
}
else
{
if ((e->alpha != 1) || (psurf->texinfo->texture->transparent))
R_DrawBrushNoMTexTrans (psurf, e->alpha);
else
R_DrawBrushNoMTex (psurf);
}
R_RenderDynamicLightmaps(psurf);
}
}
glPopMatrix ();
}
/*
=============================================================
WORLD MODEL
=============================================================
*/
/*
================
R_RecursiveWorldNode
================
*/
void R_RecursiveWorldNode (mnode_t *node)
{
int c, side;
mplane_t *plane;
msurface_t *surf, **mark;
mleaf_t *pleaf;
double dot;
if (node->contents == CONTENTS_SOLID)
return;
if (node->visframe != r_visframecount)
return;
if (R_CullBox (node->mins, node->maxs))
return;
// if a leaf node, draw stuff
if (node->contents < 0)
{
pleaf = (mleaf_t *)node;
mark = pleaf->firstmarksurface;
c = pleaf->nummarksurfaces;
if (c)
{
do
{
(*mark)->visframe = r_framecount;
mark++;
} while (--c);
}
// deal with model fragments in this leaf
if (pleaf->efrags)
R_StoreEfrags (&pleaf->efrags);
return;
}
// node is just a decision point, so go down the apropriate sides
// find which side of the node we are on
plane = node->plane;
dot = PlaneDiff (modelorg, plane);
if (dot >= 0)
side = 0;
else
side = 1;
// recurse down the children, front side first
R_RecursiveWorldNode (node->children[side]);
// draw stuff
c = node->numsurfaces;
if (c)
{
surf = cl.worldmodel->surfaces + node->firstsurface;
if (dot < 0 -BACKFACE_EPSILON)
side = SURF_PLANEBACK;
else if (dot > BACKFACE_EPSILON)
side = 0;
{
for ( ; c ; c--, surf++)
{
if (surf->visframe != r_framecount)
continue;
// don't backface underwater surfaces, because they warp
if (!(surf->flags & SURF_UNDERWATER) && ( (dot < 0) ^ !!(surf->flags & SURF_PLANEBACK)) )
continue; // wrong side
if (surf->flags & SURF_DRAWSKY)
{
surf->texturechain = skychain;
skychain = surf;
}
else if (surf->flags & SURF_DRAWTURB)
{
surf->texturechain = waterchain;
waterchain = surf;
}
else if (gl_mtexable)
R_DrawBrushMTex (surf);
else
R_DrawBrushNoMTex (surf);
R_RenderDynamicLightmaps(surf);
}
}
}
// recurse down the back side
R_RecursiveWorldNode (node->children[!side]);
}
/*
=============
R_DrawWorld
=============
*/
void R_DrawWorld (void)
{
entity_t ent;
memset (&ent, 0, sizeof(ent));
ent.model = cl.worldmodel;
VectorCopy (r_refdef.vieworg, modelorg);
currententity = &ent;
memset (lightmap_polys, 0, sizeof(lightmap_polys));
R_RecursiveWorldNode (cl.worldmodel->nodes);
if (skychain)
{
R_DrawSkyBox ();
skychain = NULL;
}
}
/*
===============
R_MarkLeaves
===============
*/
void R_MarkLeaves (void)
{
byte *vis;
mnode_t *node;
int i;
byte solid[4096];
if (r_oldviewleaf == r_viewleaf && !r_novis.value)
return;
r_visframecount++;
r_oldviewleaf = r_viewleaf;
if (r_novis.value)
{
vis = solid;
memset (solid, 0xff, (cl.worldmodel->numleafs+7)>>3);
}
else
vis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
for (i=0 ; i<cl.worldmodel->numleafs ; i++)
{
if (vis[i>>3] & (1<<(i&7)))
{
node = (mnode_t *)&cl.worldmodel->leafs[i+1];
do
{
if (node->visframe == r_visframecount)
break;
node->visframe = r_visframecount;
node = node->parent;
} while (node);
}
}
}
/*
=============================================================================
LIGHTMAP ALLOCATION
=============================================================================
*/
// returns a texture number and the position inside it
int AllocBlock (int w, int h, int *x, int *y)
{
int i, j;
int best, best2;
int texnum;
for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
{
best = BLOCK_HEIGHT;
for (i=0 ; i<BLOCK_WIDTH-w ; i++)
{
best2 = 0;
for (j=0 ; j<w ; j++)
{
if (allocated[texnum][i+j] >= best)
break;
if (allocated[texnum][i+j] > best2)
best2 = allocated[texnum][i+j];
}
if (j == w)
{ // this is a valid spot
*x = i;
*y = best = best2;
}
}
if (best + h > BLOCK_HEIGHT)
continue;
for (i=0 ; i<w ; i++)
allocated[texnum][*x + i] = best + h;
return texnum;
}
Host_Error ("AllocBlock: full, %i unable to find room for %i by %i lightmap",texnum, w, h);
return 0;
}
mvertex_t *r_pcurrentvertbase;
model_t *currentmodel;
int nColinElim;
/*
================
BuildSurfaceDisplayList
================
*/
void BuildSurfaceDisplayList (msurface_t *fa)
{
int i, lindex, lnumverts;
medge_t *pedges, *r_pedge;
int vertpage;
float *vec;
float s, t;
glpoly_t *poly;
// reconstruct the polygon
fa->visframe = 0;
pedges = currentmodel->edges;
lnumverts = fa->numedges;
vertpage = 0;
//
// draw texture
//
poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
poly->next = fa->polys;
poly->flags = fa->flags;
fa->polys = poly;
poly->numverts = lnumverts;
for (i=0 ; i<lnumverts ; i++)
{
lindex = currentmodel->surfedges[fa->firstedge + i];
if (lindex > 0)
{
r_pedge = &pedges[lindex];
vec = r_pcurrentvertbase[r_pedge->v[0]].position;
}
else
{
r_pedge = &pedges[-lindex];
vec = r_pcurrentvertbase[r_pedge->v[1]].position;
}
s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
s /= fa->texinfo->texture->width;
t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
t /= fa->texinfo->texture->height;
VectorCopy (vec, poly->verts[i]);
poly->verts[i][3] = s;
poly->verts[i][4] = t;
//
// lightmap texture coordinates
//
s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
s -= fa->texturemins[0];
s += fa->light_s*16;
s += 8;
s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
t -= fa->texturemins[1];
t += fa->light_t*16;
t += 8;
t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
poly->verts[i][5] = s;
poly->verts[i][6] = t;
}
poly->numverts = lnumverts;
}
/*
========================
GL_CreateSurfaceLightmap
========================
*/
void GL_CreateSurfaceLightmap (msurface_t *surf)
{
int smax, tmax;
byte *base;
if (surf->flags & (SURF_DRAWSKY|SURF_DRAWTURB))
return;
smax = (surf->extents[0]>>4)+1;
tmax = (surf->extents[1]>>4)+1;
surf->lightmaptexturenum = AllocBlock (smax, tmax, &surf->light_s, &surf->light_t);
base = lightmaps + surf->lightmaptexturenum*lightmap_bytes*BLOCK_WIDTH*BLOCK_HEIGHT;
base += (surf->light_t * BLOCK_WIDTH + surf->light_s) * lightmap_bytes;
R_BuildLightMap (surf, base, BLOCK_WIDTH*lightmap_bytes);
}
/*
==================
GL_BuildLightmaps
Builds the lightmap texture
with all the surfaces from all brush models
==================
*/
void GL_BuildLightmaps (void)
{
int i, j;
model_t *m;
memset (allocated, 0, sizeof(allocated));
r_framecount = 1; // no dlightcache
if (!lightmap_textures)
{
lightmap_textures = texture_extension_number;
texture_extension_number += MAX_LIGHTMAPS;
}
for (j=1 ; j<MAX_MODELS ; j++)
{
m = cl.model_precache[j];
if (!m)
break;
if (m->name[0] == '*')
continue;
r_pcurrentvertbase = m->vertexes;
currentmodel = m;
for (i=0 ; i<m->numsurfaces ; i++)
{
GL_CreateSurfaceLightmap (m->surfaces + i);
if ( m->surfaces[i].flags & SURF_DRAWTURB )
continue;
if ( m->surfaces[i].flags & SURF_DRAWSKY )
continue;
BuildSurfaceDisplayList (m->surfaces + i);
}
}
if (gl_mtexable)
qglSelectTextureSGIS_ARB(TEXTURE1_SGIS_ARB);
//
// upload all lightmaps that were filled
//
for (i=0 ; i<MAX_LIGHTMAPS ; i++)
{
if (!allocated[i][0])
break; // no more used
lightmap_modified[i] = false;
lightmap_rectchange[i].l = BLOCK_WIDTH;
lightmap_rectchange[i].t = BLOCK_HEIGHT;
lightmap_rectchange[i].w = 0;
lightmap_rectchange[i].h = 0;
glBindTexture (GL_TEXTURE_2D, lightmap_textures + i);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D (GL_TEXTURE_2D, 0, lightmap_bytes
, BLOCK_WIDTH, BLOCK_HEIGHT, 0, lightmap_format, GL_UNSIGNED_BYTE, lightmaps+i*BLOCK_WIDTH*BLOCK_HEIGHT*lightmap_bytes);
}
if (gl_mtexable)
qglSelectTextureSGIS_ARB(TEXTURE0_SGIS_ARB);
}
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