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quakeforge/libs/video/renderer/gl/gl_rsurf.c

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/*
gl_rsurf.c
surface-related refresh code
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 2000 Joseph Carter <knghtbrd@debian.org>
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <math.h>
#include <stdio.h>
#include "QF/cvar.h"
#include "QF/render.h"
#include "QF/sys.h"
#include "QF/GL/defines.h"
#include "QF/GL/funcs.h"
#include "QF/GL/qf_rmain.h"
#include "QF/GL/qf_sky.h"
#include "QF/GL/qf_textures.h"
#include "QF/GL/qf_vid.h"
#include "compat.h"
#include "r_cvar.h"
#include "r_local.h"
#include "r_shared.h"
void EmitWaterPolys (msurface_t *fa);
int active_lightmaps;
int dlightdivtable[8192];
int gl_internalformat; // 1 or 3
int lightmap_bytes; // 1, 3, or 4
int lightmap_textures;
int skytexturenum;
// LordHavoc: since lightmaps are now allocated only as needed, allow a ridiculous number :)
#define MAX_LIGHTMAPS 1024
#define BLOCK_WIDTH 128 // 256
#define BLOCK_HEIGHT 128 // 256
// keep lightmap texture data in main memory so texsubimage can update properly
// LordHavoc: changed to be allocated at runtime (typically lower memory usage)
byte *lightmaps[MAX_LIGHTMAPS];
// unsigned int blocklights[BLOCK_WIDTH * BLOCK_HEIGHT * 3];
unsigned int blocklights[18 * 18 * 3];
int allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
typedef struct glRect_s {
unsigned short l, t, w, h;
} glRect_t;
glpoly_t *fullbright_polys[MAX_GLTEXTURES];
qboolean lightmap_modified[MAX_LIGHTMAPS];
glpoly_t *lightmap_polys[MAX_LIGHTMAPS];
glRect_t lightmap_rectchange[MAX_LIGHTMAPS];
msurface_t *waterchain = NULL;
msurface_t **waterchain_tail = &waterchain;
msurface_t *sky_chain;
msurface_t **sky_chain_tail;
#define CHAIN_SURF_F2B(surf,chain) \
do { \
*(chain##_tail) = (surf); \
(chain##_tail) = &(surf)->texturechain; \
*(chain##_tail) = 0; \
} while (0)
#define CHAIN_SURF_B2F(surf,chain) \
do { \
(surf)->texturechain = (chain); \
(chain) = (surf); \
} while (0)
#if 1
# define CHAIN_SURF CHAIN_SURF_F2B
#else
# define CHAIN_SURF CHAIN_SURF_B2F
#endif
void (*R_AddDynamicLights) (msurface_t *surf);
void (*R_BuildLightMap) (msurface_t *surf, byte *dest, int stride);
// LordHavoc: place for gl_rsurf setup code
void
glrsurf_init (void)
{
int s;
memset (&lightmaps, 0, sizeof (lightmaps));
dlightdivtable[0] = 1048576 >> 7;
for (s = 1; s < 8192; s++)
dlightdivtable[s] = 1048576 / (s << 7);
}
static void
R_RecursiveLightUpdate (mnode_t *node)
{
int c;
msurface_t *surf;
if (node->children[0]->contents >= 0)
R_RecursiveLightUpdate (node->children[0]);
if (node->children[1]->contents >= 0)
R_RecursiveLightUpdate (node->children[1]);
if ((c = node->numsurfaces))
for (surf = r_worldentity.model->surfaces + node->firstsurface; c;
c--, surf++) surf->cached_dlight = true;
}
static void
R_AddDynamicLights_1 (msurface_t *surf)
{
float dist;
int lnum, maxdist, maxdist2, maxdist3, smax, smax_bytes, tmax,
grey;
unsigned int td, i, j, s, t;
unsigned int sdtable[18];
unsigned int *bl;
vec3_t impact, local;
smax = (surf->extents[0] >> 4) + 1;
smax_bytes = smax * gl_internalformat;
tmax = (surf->extents[1] >> 4) + 1;
for (lnum = 0; lnum < r_maxdlights; lnum++) {
if (!(surf->dlightbits & (1 << lnum)))
continue; // not lit by this light
VectorSubtract (r_dlights[lnum].origin, currententity->origin, local);
dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
VectorMA (r_dlights[lnum].origin, -dist, surf->plane->normal, impact);
i = DotProduct (impact, surf->texinfo->vecs[0]) +
surf->texinfo->vecs[0][3] - surf->texturemins[0];
// reduce calculations
t = dist * dist;
for (s = 0; s < smax; s++, i -= 16)
sdtable[s] = i * i + t;
i = DotProduct (impact, surf->texinfo->vecs[1]) +
surf->texinfo->vecs[1][3] - surf->texturemins[1];
// for comparisons to minimum acceptable light
maxdist = (int) ((r_dlights[lnum].radius * r_dlights[lnum].radius) *
0.75);
// clamp radius to avoid exceeding 8192 entry division table
if (maxdist > 1048576)
maxdist = 1048576;
maxdist3 = maxdist - t;
// convert to 8.8 blocklights format
grey = (r_dlights[lnum].color[0] + r_dlights[lnum].color[1] +
r_dlights[lnum].color[2]) * maxdist / 3.0;
bl = blocklights;
for (t = 0; t < tmax; t++, i -= 16) {
td = i * i;
if (td < maxdist3) { // ensure part is visible on this line
maxdist2 = maxdist - td;
for (s = 0; s < smax; s++) {
if (sdtable[s] < maxdist2) {
j = dlightdivtable[(sdtable[s] + td) >> 7];
*bl++ += (grey * j) >> 7;
} else
bl++;
}
} else
bl += smax_bytes; // skip line
}
}
}
static void
R_AddDynamicLights_3 (msurface_t *surf)
{
float dist;
int lnum, maxdist, maxdist2, maxdist3, smax, smax_bytes, tmax,
red, green, blue;
unsigned int td, i, j, s, t;
unsigned int sdtable[18];
unsigned int *bl;
vec3_t impact, local;
smax = (surf->extents[0] >> 4) + 1;
smax_bytes = smax * gl_internalformat;
tmax = (surf->extents[1] >> 4) + 1;
for (lnum = 0; lnum < r_maxdlights; lnum++) {
if (!(surf->dlightbits & (1 << lnum)))
continue; // not lit by this light
VectorSubtract (r_dlights[lnum].origin, currententity->origin, local);
dist = DotProduct (local, surf->plane->normal) - surf->plane->dist;
VectorMA (r_dlights[lnum].origin, -dist, surf->plane->normal, impact);
i = DotProduct (impact, surf->texinfo->vecs[0]) +
surf->texinfo->vecs[0][3] - surf->texturemins[0];
// reduce calculations
t = dist * dist;
for (s = 0; s < smax; s++, i -= 16)
sdtable[s] = i * i + t;
i = DotProduct (impact, surf->texinfo->vecs[1]) +
surf->texinfo->vecs[1][3] - surf->texturemins[1];
// for comparisons to minimum acceptable light
maxdist = (int) ((r_dlights[lnum].radius * r_dlights[lnum].radius) *
0.75);
// clamp radius to avoid exceeding 8192 entry division table
if (maxdist > 1048576)
maxdist = 1048576;
maxdist3 = maxdist - t;
// convert to 8.8 blocklights format
red = r_dlights[lnum].color[0] * maxdist;
green = r_dlights[lnum].color[1] * maxdist;
blue = r_dlights[lnum].color[2] * maxdist;
bl = blocklights;
for (t = 0; t < tmax; t++, i -= 16) {
td = i * i;
if (td < maxdist3) { // ensure part is visible on this line
maxdist2 = maxdist - td;
for (s = 0; s < smax; s++) {
if (sdtable[s] < maxdist2) {
j = dlightdivtable[(sdtable[s] + td) >> 7];
*bl++ += (red * j) >> 7;
*bl++ += (green * j) >> 7;
*bl++ += (blue * j) >> 7;
} else
bl += 3;
}
} else
bl += smax_bytes; // skip line
}
}
}
static void
R_BuildLightMap_1 (msurface_t *surf, byte *dest, int stride)
{
byte *lightmap;
int maps, shift, size, smax, tmax, i, j;
unsigned int scale;
unsigned int *bl;
surf->cached_dlight = (surf->dlightframe == r_framecount);
smax = (surf->extents[0] >> 4) + 1;
tmax = (surf->extents[1] >> 4) + 1;
size = smax * tmax;
lightmap = surf->samples;
// set to full bright if no light data
if (!r_worldentity.model->lightdata) {
memset (&blocklights[0], 0xff, gl_internalformat * size * sizeof(int));
goto store;
}
// clear to no light
memset (&blocklights[0], 0, gl_internalformat * size * sizeof(int));
// 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
bl = blocklights;
for (i = 0; i < (size * gl_internalformat); i++) {
*bl++ += *lightmap++ * scale;
}
}
}
// add all the dynamic lights
if (surf->dlightframe == r_framecount)
R_AddDynamicLights (surf);
store:
// bound and shift
stride -= smax * lightmap_bytes;
bl = blocklights;
#if 0
if (gl_mtex_active) {
shift = 7; // 0-1 lightmap range.
} else {
#endif
shift = 8; // 0-2 lightmap range.
#if 0
}
#endif
for (i = 0; i < tmax; i++, dest += stride) {
for (j = 0; j < smax; j++) {
*dest++ = min (*bl >> shift, 255);
bl++;
}
}
}
static void
R_BuildLightMap_3 (msurface_t *surf, byte *dest, int stride)
{
byte *lightmap;
int maps, shift, size, smax, tmax, i, j;
unsigned int scale;
unsigned int *bl;
surf->cached_dlight = (surf->dlightframe == r_framecount);
smax = (surf->extents[0] >> 4) + 1;
tmax = (surf->extents[1] >> 4) + 1;
size = smax * tmax;
lightmap = surf->samples;
// set to full bright if no light data
if (!r_worldentity.model->lightdata) {
memset (&blocklights[0], 0xff, gl_internalformat * size * sizeof(int));
goto store;
}
// clear to no light
memset (&blocklights[0], 0, gl_internalformat * size * sizeof(int));
// 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
bl = blocklights;
for (i = 0; i < (size * gl_internalformat); i++) {
*bl++ += *lightmap++ * scale;
}
}
}
// add all the dynamic lights
if (surf->dlightframe == r_framecount)
R_AddDynamicLights (surf);
store:
// bound and shift
stride -= smax * lightmap_bytes;
bl = blocklights;
#if 0
if (gl_mtex_active) {
shift = 7; // 0-1 lightmap range.
} else {
#endif
shift = 8; // 0-2 lightmap range.
#if 0
}
#endif
for (i = 0; i < tmax; i++, dest += stride) {
for (j = 0; j < smax; j++) {
*dest++ = min (*bl >> shift, 255);
bl++;
*dest++ = min (*bl >> shift, 255);
bl++;
*dest++ = min (*bl >> shift, 255);
bl++;
}
}
}
static void
R_BuildLightMap_4 (msurface_t *surf, byte * dest, int stride)
{
byte *lightmap;
int maps, shift, size, smax, tmax, i, j;
unsigned int scale;
unsigned int *bl;
surf->cached_dlight = (surf->dlightframe == r_framecount);
smax = (surf->extents[0] >> 4) + 1;
tmax = (surf->extents[1] >> 4) + 1;
size = smax * tmax;
lightmap = surf->samples;
// set to full bright if no light data
if (!r_worldentity.model->lightdata) {
memset (&blocklights[0], 0xff, gl_internalformat * size * sizeof(int));
goto store;
}
// clear to no light
memset (&blocklights[0], 0, gl_internalformat * size * sizeof(int));
// 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
bl = blocklights;
for (i = 0; i < (size * gl_internalformat); i++) {
*bl++ += *lightmap++ * scale;
}
}
}
// add all the dynamic lights
if (surf->dlightframe == r_framecount)
R_AddDynamicLights (surf);
store:
// bound and shift
stride -= smax * lightmap_bytes;
bl = blocklights;
#if 0
if (gl_mtex_active) {
shift = 7; // 0-1 lightmap range.
} else {
#endif
shift = 8; // 0-2 lightmap range.
#if 0
}
#endif
for (i = 0; i < tmax; i++, dest += stride) {
for (j = 0; j < smax; j++) {
*dest++ = min (*bl >> shift, 255);
bl++;
*dest++ = min (*bl >> shift, 255);
bl++;
*dest++ = min (*bl >> shift, 255);
bl++;
dest++; // `*dest++ = 255;` for RGBA internal format
// instead of RGB
}
}
}
/*
R_TextureAnimation
Returns the proper texture for a given time and base texture
*/
texture_t *
R_TextureAnimation (msurface_t *surf)
{
texture_t *base = surf->texinfo->texture;
int count, relative;
if (currententity->frame) {
if (base->alternate_anims)
base = base->alternate_anims;
}
relative = (int) (r_realtime * 10) % base->anim_total;
count = 0;
while (base->anim_min > relative || base->anim_max <= relative) {
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 */
static void
GL_UploadLightmap (int i, int x, int y, int w, int h)
{
/* qfglTexSubImage2D (GL_TEXTURE_2D, 0, 0, y, BLOCK_WIDTH, h,
gl_lightmap_format, GL_UNSIGNED_BYTE,
lightmaps[i] + (y * BLOCK_WIDTH) * lightmap_bytes);
*/
switch (gl_lightmap_subimage->int_val) {
case 2:
qfglTexSubImage2D (GL_TEXTURE_2D, 0, x, y, w, h,
gl_lightmap_format, GL_UNSIGNED_BYTE,
lightmaps[i] + (y * BLOCK_WIDTH) * lightmap_bytes);
break;
case 1:
qfglTexSubImage2D (GL_TEXTURE_2D, 0, 0, y, BLOCK_WIDTH, h,
gl_lightmap_format, GL_UNSIGNED_BYTE,
lightmaps[i] + (y * BLOCK_WIDTH) * lightmap_bytes);
break;
default:
case 0:
qfglTexImage2D (GL_TEXTURE_2D, 0, gl_internalformat, BLOCK_WIDTH,
BLOCK_HEIGHT, 0, gl_lightmap_format, GL_UNSIGNED_BYTE,
lightmaps[i]);
break;
}
}
#if 0
static void
R_DrawMultitexturePoly (msurface_t *s)
{
float *v;
int maps, i;
texture_t *texture;
if (!s->texinfo->texture->anim_total)
texture = s->texinfo->texture;
else
texture = R_TextureAnimation (s);
if ( texture->gl_fb_texturenum > 0) {
s->polys->fb_chain = fullbright_polys[texture->gl_fb_texturenum];
fullbright_polys[texture->gl_fb_texturenum] = s->polys;
}
c_brush_polys++;
i = s->lightmaptexturenum;
// Binds world to texture env 0
qglActiveTexture (gl_mtex_enum + 0);
qfglBindTexture (GL_TEXTURE_2D, texture->gl_texturenum);
qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
qfglEnable (GL_TEXTURE_2D);
// Binds lightmap to texenv 1
qglActiveTexture (gl_mtex_enum + 1);
qfglBindTexture (GL_TEXTURE_2D, lightmap_textures + i);
qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
qfglEnable (GL_TEXTURE_2D);
// check for lightmap modification
if (r_dynamic->int_val) {
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) || s->cached_dlight) {
dynamic:
R_BuildLightMap (s,
lightmaps[s->lightmaptexturenum] +
(s->light_t * BLOCK_WIDTH +
s->light_s) * lightmap_bytes,
BLOCK_WIDTH * lightmap_bytes);
GL_UploadLightmap (i, s->light_s, s->light_t,
(s->extents[0] >> 4) + 1,
(s->extents[1] >> 4) + 1);
}
}
qfglBegin (GL_POLYGON);
v = s->polys->verts[0];
for (i = 0; i < s->polys->numverts; i++, v += VERTEXSIZE) {
qglMultiTexCoord2f (gl_mtex_enum + 0, v[3], v[4]);
qglMultiTexCoord2f (gl_mtex_enum + 1, v[5], v[6]);
qfglVertex3fv (v);
}
qfglEnd ();
qfglDisable (GL_TEXTURE_2D);
qglActiveTexture (gl_mtex_enum + 0);
qfglEnable (GL_TEXTURE_2D);
qfglTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}
#endif
static void
R_BlendLightmaps (void)
{
float *v;
int i, j;
glpoly_t *p;
qfglDepthMask (GL_FALSE); // don't bother writing Z
qfglBlendFunc (GL_DST_COLOR, GL_SRC_COLOR);
for (i = 0; i < MAX_LIGHTMAPS; i++) {
p = lightmap_polys[i];
if (!p)
continue;
qfglBindTexture (GL_TEXTURE_2D, lightmap_textures + i);
if (lightmap_modified[i]) {
GL_UploadLightmap (i, lightmap_rectchange[i].l,
lightmap_rectchange[i].t,
lightmap_rectchange[i].w,
lightmap_rectchange[i].h);
lightmap_modified[i] = false;
}
for (; p; p = p->chain) {
qfglBegin (GL_POLYGON);
v = p->verts[0];
for (j = 0; j < p->numverts; j++, v += VERTEXSIZE) {
qfglTexCoord2fv (&v[5]);
qfglVertex3fv (v);
}
qfglEnd ();
}
}
// Return to normal blending --KB
qfglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
qfglDepthMask (GL_TRUE); // back to normal Z buffering
}
static void
R_RenderFullbrights (void)
{
float *v;
int i, j;
glpoly_t *p;
qfglBlendFunc (GL_ONE, GL_ONE);
for (i = 1; i < MAX_GLTEXTURES; i++) {
if (!fullbright_polys[i])
continue;
qfglBindTexture (GL_TEXTURE_2D, i);
for (p = fullbright_polys[i]; p; p = p->fb_chain) {
qfglBegin (GL_POLYGON);
for (j = 0, v = p->verts[0]; j < p->numverts; j++, v += VERTEXSIZE)
{
qfglTexCoord2fv (&v[3]);
qfglVertex3fv (v);
}
qfglEnd ();
}
}
qfglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
void
R_RenderBrushPoly (msurface_t *fa)
{
byte *base;
float *v;
int maps, smax, tmax, i;
glRect_t *theRect;
c_brush_polys++;
qfglBegin (GL_POLYGON);
v = fa->polys->verts[0];
for (i = 0; i < fa->polys->numverts; i++, v += VERTEXSIZE) {
qfglTexCoord2fv (&v[3]);
qfglVertex3fv (v);
}
qfglEnd ();
// add the poly to the proper lightmap chain
fa->polys->chain = lightmap_polys[fa->lightmaptexturenum];
lightmap_polys[fa->lightmaptexturenum] = fa->polys;
// check for lightmap modification
for (maps = 0; maps < MAXLIGHTMAPS && fa->styles[maps] != 255; maps++)
if (d_lightstylevalue[fa->styles[maps]] != fa->cached_light[maps])
goto dynamic;
if ((fa->dlightframe == r_framecount) || fa->cached_dlight) {
dynamic:
if (r_dynamic->int_val) {
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] +
(fa->light_t * BLOCK_WIDTH + fa->light_s) * lightmap_bytes;
R_BuildLightMap (fa, base, BLOCK_WIDTH * lightmap_bytes);
}
}
}
static void
GL_WaterSurface (msurface_t *s)
{
qfglBindTexture (GL_TEXTURE_2D, s->texinfo->texture->gl_texturenum);
if (cl_wateralpha < 1.0) {
qfglDepthMask (GL_FALSE);
color_white[3] = cl_wateralpha * 255;
qfglColor4ubv (color_white);
EmitWaterPolys (s);
qfglColor3ubv (color_white);
qfglDepthMask (GL_TRUE);
} else
EmitWaterPolys (s);
}
void
R_DrawWaterSurfaces (void)
{
int i;
msurface_t *s;
if (!waterchain)
return;
// go back to the world matrix
qfglLoadMatrixf (r_world_matrix);
if (cl_wateralpha < 1.0) {
qfglDepthMask (GL_FALSE);
color_white[3] = cl_wateralpha * 255;
qfglColor4ubv (color_white);
}
i = -1;
for (s = waterchain; s; s = s->texturechain) {
if (i != s->texinfo->texture->gl_texturenum) {
i = s->texinfo->texture->gl_texturenum;
qfglBindTexture (GL_TEXTURE_2D, i);
}
EmitWaterPolys (s);
}
waterchain = NULL;
waterchain_tail = &waterchain;
if (cl_wateralpha < 1.0) {
qfglDepthMask (GL_TRUE);
qfglColor3ubv (color_white);
}
}
static void
DrawTextureChains (void)
{
int i;
msurface_t *s;
qfglDisable (GL_BLEND);
for (i = 0; i < r_worldentity.model->numtextures; i++) {
texture_t *tex = r_worldentity.model->textures[i];
if (!tex)
continue;
qfglBindTexture (GL_TEXTURE_2D, tex->gl_texturenum);
for (s = tex->texturechain; s; s = s->texturechain)
R_RenderBrushPoly (s);
tex->texturechain = NULL;
tex->texturechain_tail = &tex->texturechain;
}
qfglEnable (GL_BLEND);
}
// FIXME: add modelalpha support?
void
R_DrawBrushModel (entity_t *e)
{
float dot;
int i, k;
model_t *clmodel;
mplane_t *pplane;
msurface_t *psurf;
qboolean rotated;
vec3_t mins, maxs;
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));
memset (fullbright_polys, 0, sizeof (fullbright_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 && r_dlight_lightmap->int_val) {
vec3_t lightorigin;
for (k = 0; k < r_maxdlights; k++) {
if ((r_dlights[k].die < r_realtime) || (!r_dlights[k].radius))
continue;
VectorSubtract (r_dlights[k].origin, e->origin, lightorigin);
R_RecursiveMarkLights (lightorigin, &r_dlights[k], 1 << k,
clmodel->nodes + clmodel->hulls[0].firstclipnode);
}
}
qfglPushMatrix ();
e->angles[0] = -e->angles[0]; // stupid quake bug
R_RotateForEntity (e);
e->angles[0] = -e->angles[0]; // stupid quake bug
// draw texture
for (i = 0; i < clmodel->nummodelsurfaces; i++, psurf++) {
// find which side of the node we are on
pplane = psurf->plane;
dot = DotProduct (modelorg, pplane->normal) - pplane->dist;
// draw the polygon
if (((psurf->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
(!(psurf->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON))) {
if (psurf->flags & SURF_DRAWTURB) {
GL_WaterSurface (psurf);
} else if (psurf->flags & SURF_DRAWSKY) {
CHAIN_SURF (psurf, sky_chain);
return;
#if 0
} else if (gl_mtex_active) {
R_DrawMultitexturePoly (psurf);
#endif
} else {
texture_t *tex;
if (!psurf->texinfo->texture->anim_total)
tex = psurf->texinfo->texture;
else
tex = R_TextureAnimation (psurf);
if ( tex->gl_fb_texturenum > 0) {
psurf->polys->fb_chain = fullbright_polys[tex->gl_fb_texturenum];
fullbright_polys[tex->gl_fb_texturenum] = psurf->polys;
}
qfglBindTexture (GL_TEXTURE_2D, tex->gl_texturenum);
R_RenderBrushPoly (psurf);
}
}
}
#if 0
if (!gl_mtex_active)
#endif
R_BlendLightmaps ();
if (gl_fb_bmodels->int_val)
R_RenderFullbrights ();
// if (gl_sky_clip->int_val)
// R_DrawSkyChain (sky_chain);
qfglPopMatrix ();
}
/* WORLD MODEL */
static void
R_RecursiveWorldNode (mnode_t *node)
{
double dot;
int c, side;
mleaf_t *pleaf;
mplane_t *plane;
msurface_t *surf;
if (node->contents == CONTENTS_SOLID)
return;
if (node->visframe != r_visframecount)
return;
if (R_CullBox (node->minmaxs, node->minmaxs + 3))
return;
// if a leaf node, draw stuff
if (node->contents < 0) {
pleaf = (mleaf_t *) node;
// 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 appropriate sides
// find which side of the node we are on
plane = node->plane;
if (plane->type < 3)
dot = modelorg[plane->type] - plane->dist;
else
dot = DotProduct (modelorg, plane->normal) - plane->dist;
side = dot < 0;
// recurse down the children, front side first
R_RecursiveWorldNode (node->children[side]);
// sneaky hack for side = side ? SURF_PLANEBACK : 0;
side = (~side + 1) & SURF_PLANEBACK;
// draw stuff
if ((c = node->numsurfaces)) {
surf = r_worldentity.model->surfaces + node->firstsurface;
for (; c; c--, surf++) {
if (surf->visframe != r_visframecount)
continue;
// side is either 0 or SURF_PLANEBACK
if (side ^ (surf->flags & SURF_PLANEBACK))
continue; // wrong side
if (surf->flags & SURF_DRAWTURB) {
// if (cl_wateralpha < 1.0) // FIXME: DESPAIR
CHAIN_SURF_B2F (surf, waterchain);
// else
// CHAIN_SURF (surf, waterchain);
} else if (surf->flags & SURF_DRAWSKY) {
CHAIN_SURF (surf, sky_chain);
#if 0
} else if (gl_mtex_active) {
R_DrawMultitexturePoly (surf);
#endif
} else {
texture_t *tex;
if (!surf->texinfo->texture->anim_total)
tex = surf->texinfo->texture;
else
tex = R_TextureAnimation (surf);
if (tex->gl_fb_texturenum > 0) {
surf->polys->fb_chain = fullbright_polys[tex->gl_fb_texturenum];
fullbright_polys[tex->gl_fb_texturenum] = surf->polys;
}
CHAIN_SURF (surf, tex->texturechain);
}
}
}
// recurse down the back side
R_RecursiveWorldNode (node->children[!side]);
}
void
R_DrawWorld (void)
{
entity_t ent;
memset (&ent, 0, sizeof (ent));
ent.model = r_worldentity.model;
VectorCopy (r_refdef.vieworg, modelorg);
currententity = &ent;
memset (lightmap_polys, 0, sizeof (lightmap_polys));
memset (fullbright_polys, 0, sizeof (fullbright_polys));
sky_chain = 0;
sky_chain_tail = &sky_chain;
if (!gl_sky_clip->int_val) {
R_DrawSky ();
}
R_RecursiveWorldNode (r_worldentity.model->nodes);
R_DrawSkyChain (sky_chain);
DrawTextureChains ();
#if 0
if (!gl_mtex_active)
#endif
R_BlendLightmaps ();
if (gl_fb_bmodels->int_val)
R_RenderFullbrights ();
}
void
R_MarkLeaves (void)
{
byte solid[4096];
byte *vis;
int c;
unsigned int i;
mleaf_t *leaf;
mnode_t *node;
msurface_t **mark;
if (r_oldviewleaf == r_viewleaf && !r_novis->int_val)
return;
r_visframecount++;
r_oldviewleaf = r_viewleaf;
if (r_novis->int_val) {
vis = solid;
memset (solid, 0xff, (r_worldentity.model->numleafs + 7) >> 3);
} else
vis = Mod_LeafPVS (r_viewleaf, r_worldentity.model);
for (i = 0; i < r_worldentity.model->numleafs; i++) {
if (vis[i >> 3] & (1 << (i & 7))) {
leaf = &r_worldentity.model->leafs[i + 1];
if ((c = leaf->nummarksurfaces)) {
mark = leaf->firstmarksurface;
do {
(*mark)->visframe = r_visframecount;
mark++;
} while (--c);
}
node = (mnode_t *) leaf;
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
static int
AllocBlock (int w, int h, int *x, int *y)
{
int best, best2, texnum, i, j;
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;
// LordHavoc: allocate lightmaps only as needed
if (!lightmaps[texnum])
lightmaps[texnum] = calloc (BLOCK_WIDTH * BLOCK_HEIGHT,
lightmap_bytes);
for (i = 0; i < w; i++)
allocated[texnum][*x + i] = best + h;
return texnum;
}
Sys_Error ("AllocBlock: full");
return 0;
}
int nColinElim;
model_t *currentmodel;
mvertex_t *r_pcurrentvertbase;
static void
BuildSurfaceDisplayList (msurface_t *fa)
{
float s, t;
float *vec;
int lindex, lnumverts, vertpage, i;
glpoly_t *poly;
medge_t *pedges, *r_pedge;
// reconstruct the polygon
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;
}
// remove co-linear points - Ed
if (!gl_keeptjunctions->int_val && !(fa->flags & SURF_UNDERWATER)) {
for (i = 0; i < lnumverts; ++i) {
vec3_t v1, v2;
float *prev, *this, *next;
prev = poly->verts[(i + lnumverts - 1) % lnumverts];
this = poly->verts[i];
next = poly->verts[(i + 1) % lnumverts];
VectorSubtract (this, prev, v1);
VectorNormalize (v1);
VectorSubtract (next, prev, v2);
VectorNormalize (v2);
// skip co-linear points
# define COLINEAR_EPSILON 0.001
if ((fabs (v1[0] - v2[0]) <= COLINEAR_EPSILON) &&
(fabs (v1[1] - v2[1]) <= COLINEAR_EPSILON) &&
(fabs (v1[2] - v2[2]) <= COLINEAR_EPSILON)) {
int j;
for (j = i + 1; j < lnumverts; ++j) {
int k;
for (k = 0; k < VERTEXSIZE; ++k)
poly->verts[j - 1][k] = poly->verts[j][k];
}
--lnumverts;
++nColinElim;
// retry next vertex next time, which is now current vertex
--i;
}
}
}
poly->numverts = lnumverts;
}
static void
GL_CreateSurfaceLightmap (msurface_t *surf)
{
byte *base;
int smax, tmax;
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] +
(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 (model_t **models, int num_models)
{
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;
}
switch (r_lightmap_components->int_val) {
case 1:
gl_internalformat = 1;
gl_lightmap_format = GL_LUMINANCE;
lightmap_bytes = 1;
R_AddDynamicLights = R_AddDynamicLights_1;
R_BuildLightMap = R_BuildLightMap_1;
break;
case 3:
gl_internalformat = 3;
gl_lightmap_format = GL_RGB;
lightmap_bytes = 3;
R_AddDynamicLights = R_AddDynamicLights_3;
R_BuildLightMap = R_BuildLightMap_3;
break;
case 4:
default:
gl_internalformat = 3;
gl_lightmap_format = GL_RGBA;
lightmap_bytes = 4;
R_AddDynamicLights = R_AddDynamicLights_3;
R_BuildLightMap = R_BuildLightMap_4;
break;
}
for (j = 1; j < num_models; j++) {
m = models[j];
if (!m)
break;
if (m->name[0] == '*')
continue;
r_pcurrentvertbase = m->vertexes;
currentmodel = m;
for (i = 0; i < m->numsurfaces; i++) {
if (m->surfaces[i].flags & SURF_DRAWTURB)
continue;
if (gl_sky_divide->int_val && (m->surfaces[i].flags &
SURF_DRAWSKY))
continue;
GL_CreateSurfaceLightmap (m->surfaces + i);
BuildSurfaceDisplayList (m->surfaces + i);
}
}
#if 0
if (gl_mtex_active)
qglActiveTexture (gl_mtex_enum + 1);
#endif
// 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;
qfglBindTexture (GL_TEXTURE_2D, lightmap_textures + i);
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
qfglTexImage2D (GL_TEXTURE_2D, 0, lightmap_bytes, BLOCK_WIDTH,
BLOCK_HEIGHT, 0, gl_lightmap_format,
GL_UNSIGNED_BYTE, lightmaps[i]);
}
#if 0
if (gl_mtex_active)
qglActiveTexture (gl_mtex_enum + 0);
#endif
}
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