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- /*
- Copyright (C) 1997-2001 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 <assert.h>
-
- #include "r_local.h"
-
- static vec3_t modelorg; // relative to viewpoint
-
- msurface_t *r_alpha_surfaces;
-
- #define DYNAMIC_LIGHT_WIDTH 128
- #define DYNAMIC_LIGHT_HEIGHT 128
-
- #define LIGHTMAP_BYTES 4
-
- #define BLOCK_WIDTH 128
- #define BLOCK_HEIGHT 128
-
- #define MAX_LIGHTMAPS 128
-
- int c_visible_lightmaps;
- int c_visible_textures;
-
- #define GL_LIGHTMAP_FORMAT GL_RGBA
-
- typedef struct
- {
- int internal_format;
- int current_lightmap_texture;
-
- msurface_t *lightmap_surfaces[MAX_LIGHTMAPS];
-
- int allocated[BLOCK_WIDTH];
-
- // the lightmap texture data needs to be kept in
- // main memory so texsubimage can update properly
- byte lightmap_buffer[4*BLOCK_WIDTH*BLOCK_HEIGHT];
- } gllightmapstate_t;
-
- static gllightmapstate_t gl_lms;
-
-
- static void LM_InitBlock( void );
- static void LM_UploadBlock( qboolean dynamic );
- static qboolean LM_AllocBlock (int w, int h, int *x, int *y);
-
- extern void R_SetCacheState( msurface_t *surf );
- extern void R_BuildLightMap (msurface_t *surf, byte *dest, int stride);
-
- /*
- =============================================================
-
- BRUSH MODELS
-
- =============================================================
- */
-
- /*
- ===============
- R_TextureAnimation
-
- Returns the proper texture for a given time and base texture
- ===============
- */
- image_t *R_TextureAnimation (mtexinfo_t *tex)
- {
- int c;
-
- if (!tex->next)
- return tex->image;
-
- c = currententity->frame % tex->numframes;
- while (c)
- {
- tex = tex->next;
- c--;
- }
-
- return tex->image;
- }
-
- /*
- ================
- DrawGLPoly
- ================
- */
- void DrawGLPoly (glpoly_t *p, int flags)
- {
- int i;
- float *v = p->verts[0];
- float scroll;
-
- scroll = 0;
- if (flags & SURF_FLOWING)
- {
- scroll = -64 * ( (r_newrefdef.time / 40.0) - (int)(r_newrefdef.time / 40.0) );
- if (scroll == 0.0)
- scroll = -64.0;
- }
-
- qglBegin (GL_POLYGON);
- for (i=0 ; i<p->numverts ; i++, v+= VERTEXSIZE)
- {
- qglTexCoord2f (v[3] + scroll, v[4]);
- qglVertex3fv (v);
- }
- qglEnd ();
- }
-
- /*
- ** R_DrawTriangleOutlines
- */
- void R_DrawTriangleOutlines (void)
- {
- int i, j;
- glpoly_t *p;
-
- if (!gl_showtris->value)
- return;
-
- qglDisable (GL_TEXTURE_2D);
- qglDisable (GL_DEPTH_TEST);
- qglColor4f (1,1,1,1);
-
- for (i=0 ; i<MAX_LIGHTMAPS ; i++)
- {
- msurface_t *surf;
-
- for ( surf = gl_lms.lightmap_surfaces[i]; surf != 0; surf = surf->lightmapchain )
- {
- p = surf->polys;
- for (j=2 ; j<p->numverts ; j++ )
- {
- qglBegin (GL_LINE_STRIP);
- qglVertex3fv (p->verts[0]);
- qglVertex3fv (p->verts[j-1]);
- qglVertex3fv (p->verts[j]);
- qglVertex3fv (p->verts[0]);
- qglEnd ();
- }
- }
- }
-
- qglEnable (GL_DEPTH_TEST);
- qglEnable (GL_TEXTURE_2D);
- }
-
- /*
- ** DrawGLPolyLightmap
- */
- void DrawGLPolyLightmap( glpoly_t *p, float soffset, float toffset )
- {
- float *v = p->verts[0];
- int j;
-
- qglBegin (GL_POLYGON);
- for (j=0 ; j<p->numverts ; j++, v+= VERTEXSIZE)
- {
- qglTexCoord2f (v[5] - soffset, v[6] - toffset );
- qglVertex3fv (v);
- }
- qglEnd ();
- }
-
- /*
- ** R_BlendLightMaps
- **
- ** This routine takes all the given light mapped surfaces in the world and
- ** blends them into the framebuffer.
- */
- void R_BlendLightmaps (void)
- {
- int i;
- msurface_t *surf, *newdrawsurf = 0;
-
- // don't bother if we're set to fullbright
- if (r_fullbright->value)
- return;
- if (!r_worldmodel->lightdata)
- return;
-
- // don't bother writing Z
- qglDepthMask( 0 );
-
- /*
- ** set the appropriate blending mode unless we're only looking at the
- ** lightmaps.
- */
- if (!gl_lightmap->value)
- {
- qglEnable (GL_BLEND);
-
- if ( gl_saturatelighting->value )
- {
- qglBlendFunc( GL_ONE, GL_ONE );
- }
- else
- {
- if ( gl_monolightmap->string[0] != '0' )
- {
- switch ( toupper( gl_monolightmap->string[0] ) )
- {
- case 'I':
- qglBlendFunc (GL_ZERO, GL_SRC_COLOR );
- break;
- case 'L':
- qglBlendFunc (GL_ZERO, GL_SRC_COLOR );
- break;
- case 'A':
- default:
- qglBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
- break;
- }
- }
- else
- {
- qglBlendFunc (GL_ZERO, GL_SRC_COLOR );
- }
- }
- }
-
- if ( currentmodel == r_worldmodel )
- c_visible_lightmaps = 0;
-
- /*
- ** render static lightmaps first
- */
- for ( i = 1; i < MAX_LIGHTMAPS; i++ )
- {
- if ( gl_lms.lightmap_surfaces[i] )
- {
- if (currentmodel == r_worldmodel)
- c_visible_lightmaps++;
- GL_Bind( gl_state.lightmap_textures + i);
-
- for ( surf = gl_lms.lightmap_surfaces[i]; surf != 0; surf = surf->lightmapchain )
- {
- if ( surf->polys )
- DrawGLPolyLightmap( surf->polys, 0, 0 );
- }
- }
- }
-
- /*
- ** render dynamic lightmaps
- */
- if ( gl_dynamic->value )
- {
- LM_InitBlock();
-
- GL_Bind( gl_state.lightmap_textures+0 );
-
- if (currentmodel == r_worldmodel)
- c_visible_lightmaps++;
-
- newdrawsurf = gl_lms.lightmap_surfaces[0];
-
- for ( surf = gl_lms.lightmap_surfaces[0]; surf != 0; surf = surf->lightmapchain )
- {
- int smax, tmax;
- byte *base;
-
- smax = (surf->extents[0]>>4)+1;
- tmax = (surf->extents[1]>>4)+1;
-
- if ( LM_AllocBlock( smax, tmax, &surf->dlight_s, &surf->dlight_t ) )
- {
- base = gl_lms.lightmap_buffer;
- base += ( surf->dlight_t * BLOCK_WIDTH + surf->dlight_s ) * LIGHTMAP_BYTES;
-
- R_BuildLightMap (surf, base, BLOCK_WIDTH*LIGHTMAP_BYTES);
- }
- else
- {
- msurface_t *drawsurf;
-
- // upload what we have so far
- LM_UploadBlock( true );
-
- // draw all surfaces that use this lightmap
- for ( drawsurf = newdrawsurf; drawsurf != surf; drawsurf = drawsurf->lightmapchain )
- {
- if ( drawsurf->polys )
- DrawGLPolyLightmap( drawsurf->polys,
- ( drawsurf->light_s - drawsurf->dlight_s ) * ( 1.0 / 128.0 ),
- ( drawsurf->light_t - drawsurf->dlight_t ) * ( 1.0 / 128.0 ) );
- }
-
- newdrawsurf = drawsurf;
-
- // clear the block
- LM_InitBlock();
-
- // try uploading the block now
- if ( !LM_AllocBlock( smax, tmax, &surf->dlight_s, &surf->dlight_t ) )
- {
- Com_Error( ERR_FATAL, "Consecutive calls to LM_AllocBlock(%d,%d) failed (dynamic)\n", smax, tmax );
- }
-
- base = gl_lms.lightmap_buffer;
- base += ( surf->dlight_t * BLOCK_WIDTH + surf->dlight_s ) * LIGHTMAP_BYTES;
-
- R_BuildLightMap (surf, base, BLOCK_WIDTH*LIGHTMAP_BYTES);
- }
- }
-
- /*
- ** draw remainder of dynamic lightmaps that haven't been uploaded yet
- */
- if ( newdrawsurf )
- LM_UploadBlock( true );
-
- for ( surf = newdrawsurf; surf != 0; surf = surf->lightmapchain )
- {
- if ( surf->polys )
- DrawGLPolyLightmap( surf->polys, ( surf->light_s - surf->dlight_s ) * ( 1.0 / 128.0 ), ( surf->light_t - surf->dlight_t ) * ( 1.0 / 128.0 ) );
- }
- }
-
- /*
- ** restore state
- */
- qglDisable (GL_BLEND);
- qglBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- qglDepthMask( 1 );
- }
-
- /*
- ================
- R_RenderBrushPoly
- ================
- */
- void R_RenderBrushPoly (msurface_t *fa)
- {
- int maps;
- image_t *image;
- qboolean is_dynamic = false;
-
- c_brush_polys++;
-
- image = R_TextureAnimation (fa->texinfo);
-
- if (fa->flags & SURF_DRAWTURB)
- {
- GL_Bind( image->texnum );
-
- // warp texture, no lightmaps
- GL_TexEnv( GL_MODULATE );
- qglColor4f( gl_state.inverse_intensity,
- gl_state.inverse_intensity,
- gl_state.inverse_intensity,
- 1.0F );
- EmitWaterPolys (fa);
- GL_TexEnv( GL_REPLACE );
-
- return;
- }
- else
- {
- GL_Bind( image->texnum );
-
- GL_TexEnv( GL_REPLACE );
- }
-
- if (SurfaceIsAlphaBlended(fa))
- qglEnable( GL_ALPHA_TEST );
-
- DrawGLPoly (fa->polys, fa->texinfo->flags);
-
- if (SurfaceIsAlphaBlended(fa))
- {
- qglDisable( GL_ALPHA_TEST );
- return;
- }//for now until Vic fixes problems with colored lightmaps on these surfaces
-
- /*
- ** check for lightmap modification
- */
- for ( maps = 0; maps < MAXLIGHTMAPS && fa->styles[maps] != 255; maps++ )
- {
- if ( r_newrefdef.lightstyles[fa->styles[maps]].white != fa->cached_light[maps] )
- goto dynamic;
- }
-
- // dynamic this frame or dynamic previously
- if ( ( fa->dlightframe == r_framecount ) )
- {
- dynamic:
- if ( gl_dynamic->value )
- {
- if ( !SurfaceHasNoLightmap( fa ) )
- {
- is_dynamic = true;
- }
- }
- }
-
- if ( is_dynamic )
- {
- if ( ( fa->styles[maps] >= 32 || fa->styles[maps] == 0 ) && ( fa->dlightframe != r_framecount ) )
- {
- unsigned temp[34*34];
- int smax, tmax;
-
- smax = (fa->extents[0]>>4)+1;
- tmax = (fa->extents[1]>>4)+1;
-
- R_BuildLightMap( fa, (void *)temp, smax*4 );
- R_SetCacheState( fa );
-
- GL_Bind( gl_state.lightmap_textures + fa->lightmaptexturenum );
-
- qglTexSubImage2D( GL_TEXTURE_2D, 0,
- fa->light_s, fa->light_t,
- smax, tmax,
- GL_LIGHTMAP_FORMAT,
- GL_UNSIGNED_BYTE, temp );
-
- fa->lightmapchain = gl_lms.lightmap_surfaces[fa->lightmaptexturenum];
- gl_lms.lightmap_surfaces[fa->lightmaptexturenum] = fa;
- }
- else
- {
- fa->lightmapchain = gl_lms.lightmap_surfaces[0];
- gl_lms.lightmap_surfaces[0] = fa;
- }
- }
- else
- {
- fa->lightmapchain = gl_lms.lightmap_surfaces[fa->lightmaptexturenum];
- gl_lms.lightmap_surfaces[fa->lightmaptexturenum] = fa;
- }
- }
-
-
- /*
- ================
- R_DrawAlphaSurfaces
-
- Draw water surfaces and windows.
- The BSP tree is waled front to back, so unwinding the chain
- of alpha_surfaces will draw back to front, giving proper ordering.
- ================
- */
- void R_DrawAlphaSurfaces (void)
- {
- msurface_t *s;
- float intens;
-
- //
- // go back to the world matrix
- //
- qglLoadMatrixf (r_world_matrix);
-
- qglDepthMask ( GL_FALSE );
- qglEnable (GL_BLEND);
- GL_TexEnv( GL_MODULATE );
-
- // the textures are prescaled up for a better lighting range,
- // so scale it back down
- intens = gl_state.inverse_intensity;
-
- for (s=r_alpha_surfaces ; s ; s=s->texturechain)
- {
- GL_Bind(s->texinfo->image->texnum);
- c_brush_polys++;
-
- if (s->texinfo->flags & SURF_TRANS33)
- qglColor4f (intens, intens, intens, 0.33);
- else if (s->texinfo->flags & SURF_TRANS66)
- qglColor4f (intens, intens, intens, 0.66);
- else
- qglColor4f (intens, intens, intens, 1);
-
- if (s->flags & SURF_DRAWTURB)
- EmitWaterPolys (s);
- else
- DrawGLPoly (s->polys, s->texinfo->flags);
- }
-
- GL_TexEnv( GL_REPLACE );
- qglColor4f (1,1,1,1);
- qglDisable (GL_BLEND);
- qglDepthMask ( GL_TRUE );
-
- r_alpha_surfaces = NULL;
- }
-
- /*
- ================
- DrawTextureChains
- ================
- */
- void DrawTextureChains (void)
- {
- int i;
- msurface_t *s;
- image_t *image;
-
- c_visible_textures = 0;
-
- // GL_TexEnv( GL_REPLACE );
-
- if ( !qglSelectTextureSGIS && !qglActiveTextureARB )
- {
- for ( i = 0, image=gltextures ; i<numgltextures ; i++,image++)
- {
- if (!image->registration_sequence)
- continue;
- s = image->texturechain;
- if (!s)
- continue;
- c_visible_textures++;
-
- for ( ; s ; s=s->texturechain)
- R_RenderBrushPoly (s);
-
- image->texturechain = NULL;
- }
- }
- else
- {
- for ( i = 0, image=gltextures ; i<numgltextures ; i++,image++)
- {
- if (!image->registration_sequence)
- continue;
- if (!image->texturechain)
- continue;
- c_visible_textures++;
-
- for ( s = image->texturechain; s ; s=s->texturechain)
- {
- if ( !( s->flags & SURF_DRAWTURB ) )
- R_RenderBrushPoly (s);
- }
- }
-
- GL_EnableMultitexture( false );
- for ( i = 0, image=gltextures ; i<numgltextures ; i++,image++)
- {
- if (!image->registration_sequence)
- continue;
- s = image->texturechain;
- if (!s)
- continue;
-
- for ( ; s ; s=s->texturechain)
- {
- if ( s->flags & SURF_DRAWTURB )
- R_RenderBrushPoly (s);
- }
-
- image->texturechain = NULL;
- }
- // GL_EnableMultitexture( true );
- }
-
- GL_TexEnv( GL_REPLACE );
- }
-
-
- static void GL_RenderLightmappedPoly( msurface_t *surf )
- {
- int i, nv = surf->polys->numverts;
- int map;
- float scroll;
- float *v;
- image_t *image = R_TextureAnimation( surf->texinfo );
- qboolean is_dynamic = false;
- unsigned lmtex = surf->lightmaptexturenum;
-
- for ( map = 0; map < MAXLIGHTMAPS && surf->styles[map] != 255; map++ )
- {
- if ( r_newrefdef.lightstyles[surf->styles[map]].white != surf->cached_light[map] )
- goto dynamic;
- }
-
- // dynamic this frame or dynamic previously
- if ( ( surf->dlightframe == r_framecount ) )
- {
- dynamic:
- if ( gl_dynamic->value )
- {
- if ( !SurfaceHasNoLightmap(surf) )
- is_dynamic = true;
- }
- }
-
- c_brush_polys++;
-
- if ( is_dynamic )
- {
- unsigned temp[128*128];
- int smax, tmax;
-
- smax = (surf->extents[0]>>4)+1;
- tmax = (surf->extents[1]>>4)+1;
-
- R_BuildLightMap( surf, (void *)temp, smax*4 );
-
- if ( ( surf->styles[map] >= 32 || surf->styles[map] == 0 ) && ( surf->dlightframe != r_framecount ) ) {
- R_SetCacheState( surf );
- } else {
- lmtex = 0;
- }
-
- GL_MBind( GL_TEXTURE1, gl_state.lightmap_textures + lmtex );
- qglTexSubImage2D( GL_TEXTURE_2D, 0,
- surf->light_s, surf->light_t,
- smax, tmax,
- GL_LIGHTMAP_FORMAT,
- GL_UNSIGNED_BYTE, temp );
- }
-
- if (SurfaceIsAlphaBlended(surf))
- qglEnable( GL_ALPHA_TEST );
-
- GL_MBind( GL_TEXTURE0, image->texnum );
- GL_MBind( GL_TEXTURE1, gl_state.lightmap_textures + lmtex );
-
- scroll = 0;
- if (surf->texinfo->flags & SURF_FLOWING)
- {
- scroll = -64 * ( (r_newrefdef.time / 40.0) - (int)(r_newrefdef.time / 40.0) );
- if (scroll == 0.0)
- scroll = -64.0;
- }
-
- v = surf->polys->verts[0];
- qglBegin (GL_POLYGON);
- for (i=0 ; i< nv; i++, v+= VERTEXSIZE)
- {
- qglMTexCoord2fSGIS( GL_TEXTURE0, v[3]+scroll, v[4]);
- qglMTexCoord2fSGIS( GL_TEXTURE1, v[5], v[6]);
- qglVertex3fv (v);
- }
- qglEnd ();
-
- if (SurfaceIsAlphaBlended(surf))
- qglDisable( GL_ALPHA_TEST);
- }
-
- /*
- =================
- R_DrawInlineBModel
- =================
- */
- void R_DrawInlineBModel (void)
- {
- int i;
- cplane_t *pplane;
- float dot;
- msurface_t *psurf;
-
- R_PushDlightsForBModel ( currententity );
-
- if ( currententity->flags & RF_TRANSLUCENT )
- {
- qglEnable (GL_BLEND);
- qglColor4f (1,1,1,0.25);
- GL_TexEnv( GL_MODULATE );
- }
-
- //
- // draw texture
- //
- psurf = ¤tmodel->surfaces[currentmodel->firstmodelsurface];
- for (i=0 ; i<currentmodel->nummodelsurfaces ; i++, psurf++)
- {
- // find which side of the plane 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 (SurfaceIsTranslucent(psurf) && !SurfaceIsAlphaBlended(psurf))
- { // add to the translucent chain
- psurf->texturechain = r_alpha_surfaces;
- r_alpha_surfaces = psurf;
- }
- else if ( qglMTexCoord2fSGIS && !( psurf->flags & SURF_DRAWTURB ) )
- {
- GL_RenderLightmappedPoly( psurf );
- }
- else
- {
- GL_EnableMultitexture( false );
- R_RenderBrushPoly( psurf );
- GL_EnableMultitexture( true );
- }
-
- psurf->visframe = r_framecount;
- }
- }
-
- if ( !(currententity->flags & RF_TRANSLUCENT) )
- {
- if ( !qglMTexCoord2fSGIS )
- R_BlendLightmaps ();
- }
- else
- {
- qglDisable (GL_BLEND);
- qglColor4f (1,1,1,1);
- GL_TexEnv( GL_REPLACE );
- }
- }
-
- /*
- =================
- R_DrawBrushModel
- =================
- */
- void R_DrawBrushModel (entity_t *e)
- {
- vec3_t mins, maxs;
- int i;
- qboolean rotated;
-
- if (currentmodel->nummodelsurfaces == 0)
- return;
-
- currententity = e;
- gl_state.currenttextures[0] = gl_state.currenttextures[1] = -1;
-
- if (e->angles[0] || e->angles[1] || e->angles[2])
- {
- rotated = true;
- for (i=0 ; i<3 ; i++)
- {
- mins[i] = e->origin[i] - currentmodel->radius;
- maxs[i] = e->origin[i] + currentmodel->radius;
- }
- }
- else
- {
- rotated = false;
- VectorAdd (e->origin, currentmodel->mins, mins);
- VectorAdd (e->origin, currentmodel->maxs, maxs);
- }
-
- R_PushStainsForBModel ( e );
-
- if (R_CullBox (mins, maxs)) {
- return;
- }
-
- qglColor3f (1,1,1);
- memset (gl_lms.lightmap_surfaces, 0, sizeof(gl_lms.lightmap_surfaces));
-
- VectorSubtract (r_newrefdef.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);
- }
-
- qglPushMatrix ();
- e->angles[0] = -e->angles[0]; // stupid quake bug
- e->angles[2] = -e->angles[2]; // stupid quake bug
- R_RotateForEntity (e);
- e->angles[0] = -e->angles[0]; // stupid quake bug
- e->angles[2] = -e->angles[2]; // stupid quake bug
-
- GL_EnableMultitexture( true );
- GL_SelectTexture( GL_TEXTURE0);
- GL_TexEnv( GL_REPLACE );
- GL_SelectTexture( GL_TEXTURE1);
- GL_TexEnv( GL_MODULATE );
-
- R_DrawInlineBModel ();
- GL_EnableMultitexture( false );
-
- qglPopMatrix ();
- }
-
- /*
- =============================================================
-
- WORLD MODEL
-
- =============================================================
- */
-
- /*
- ================
- R_RecursiveWorldNode
- ================
- */
- void R_RecursiveWorldNode (mnode_t *node)
- {
- int c, side, sidebit;
- cplane_t *plane;
- msurface_t *surf, **mark;
- mleaf_t *pleaf;
- float dot;
- image_t *image;
-
- if (node->contents == CONTENTS_SOLID)
- return; // solid
-
- if (node->visframe != r_visframecount)
- return;
- if (R_CullBox (node->minmaxs, node->minmaxs+3))
- return;
-
- // if a leaf node, draw stuff
- if (node->contents != -1)
- {
- pleaf = (mleaf_t *)node;
-
- // check for door connected areas
- if (r_newrefdef.areabits)
- {
- if (! (r_newrefdef.areabits[pleaf->area>>3] & (1<<(pleaf->area&7)) ) )
- return; // not visible
- }
-
- mark = pleaf->firstmarksurface;
- if (! (c = pleaf->nummarksurfaces) )
- return;
-
- do
- {
- (*mark++)->visframe = r_framecount;
- } while (--c);
-
- 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;
-
- switch (plane->type)
- {
- case PLANE_X:
- dot = modelorg[0] - plane->dist;
- break;
- case PLANE_Y:
- dot = modelorg[1] - plane->dist;
- break;
- case PLANE_Z:
- dot = modelorg[2] - plane->dist;
- break;
- default:
- dot = DotProduct (modelorg, plane->normal) - plane->dist;
- break;
- }
-
- if (dot >= 0)
- {
- side = 0;
- sidebit = 0;
- }
- else
- {
- side = 1;
- sidebit = SURF_PLANEBACK;
- }
-
- // recurse down the children, front side first
- R_RecursiveWorldNode (node->children[side]);
-
- // draw stuff
- for ( c = node->numsurfaces, surf = r_worldmodel->surfaces + node->firstsurface; c ; c--, surf++)
- {
- if (surf->visframe != r_framecount)
- continue;
-
- if ( (surf->flags & SURF_PLANEBACK) != sidebit )
- continue; // wrong side
- if (surf->texinfo->flags & SURF_SKY)
- { // just adds to visible sky bounds
- R_AddSkySurface (surf);
- }
- else if (SurfaceIsTranslucent(surf) && !SurfaceIsAlphaBlended(surf))
- { // add to the translucent chain
- surf->texturechain = r_alpha_surfaces;
- r_alpha_surfaces = surf;
- }
- else
- {
- if ( qglMTexCoord2fSGIS && !( surf->flags & SURF_DRAWTURB ) )
- {
- GL_RenderLightmappedPoly( surf );
- }
- else
- {
- // the polygon is visible, so add it to the texture
- // sorted chain
- // FIXME: this is a hack for animation
- image = R_TextureAnimation (surf->texinfo);
- surf->texturechain = image->texturechain;
- image->texturechain = surf;
- }
- }
- }
-
- // recurse down the back side
- R_RecursiveWorldNode (node->children[!side]);
- }
-
-
- /*
- =============
- R_DrawWorld
- =============
- */
- void R_DrawWorld (void)
- {
- entity_t ent;
-
- if (!r_drawworld->value)
- return;
-
- if ( r_newrefdef.rdflags & RDF_NOWORLDMODEL )
- return;
-
- currentmodel = r_worldmodel;
-
- VectorCopy (r_newrefdef.vieworg, modelorg);
-
- // auto cycle the world frame for texture animation
- memset (&ent, 0, sizeof(ent));
- ent.frame = (int)(r_newrefdef.time*2);
- currententity = &ent;
-
- gl_state.currenttextures[0] = gl_state.currenttextures[1] = -1;
-
- qglColor3f (1,1,1);
- memset (gl_lms.lightmap_surfaces, 0, sizeof(gl_lms.lightmap_surfaces));
-
- R_ClearSkyBox ();
-
- if ( qglMTexCoord2fSGIS )
- {
- GL_EnableMultitexture( true );
-
- GL_SelectTexture( GL_TEXTURE0);
- GL_TexEnv( GL_REPLACE );
- GL_SelectTexture( GL_TEXTURE1);
-
- if ( gl_lightmap->value )
- GL_TexEnv( GL_REPLACE );
- else
- GL_TexEnv( GL_MODULATE );
-
- R_RecursiveWorldNode (r_worldmodel->nodes);
-
- GL_EnableMultitexture( false );
- }
- else
- {
- R_RecursiveWorldNode (r_worldmodel->nodes);
- }
-
- /*
- ** theoretically nothing should happen in the next two functions
- ** if multitexture is enabled
- */
- DrawTextureChains ();
- R_BlendLightmaps ();
-
- R_DrawSkyBox ();
-
- R_DrawTriangleOutlines ();
- }
-
-
- /*
- ===============
- R_MarkLeaves
-
- Mark the leaves and nodes that are in the PVS for the current
- cluster
- ===============
- */
- void R_MarkLeaves (void)
- {
- byte *vis;
- byte fatvis[MAX_MAP_LEAFS/8];
- mnode_t *node;
- int i, c;
- mleaf_t *leaf;
- int cluster;
-
- if (r_oldviewcluster == r_viewcluster && r_oldviewcluster2 == r_viewcluster2 && !r_novis->value && r_viewcluster != -1)
- return;
-
- // development aid to let you run around and see exactly where
- // the pvs ends
- if (gl_lockpvs->value)
- return;
-
- r_visframecount++;
- r_oldviewcluster = r_viewcluster;
- r_oldviewcluster2 = r_viewcluster2;
-
- if (r_novis->value || r_viewcluster == -1 || !r_worldmodel->vis)
- {
- // mark everything
- for (i=0 ; i<r_worldmodel->numleafs ; i++)
- r_worldmodel->leafs[i].visframe = r_visframecount;
- for (i=0 ; i<r_worldmodel->numnodes ; i++)
- r_worldmodel->nodes[i].visframe = r_visframecount;
- return;
- }
-
- vis = Mod_ClusterPVS (r_viewcluster, r_worldmodel);
- // may have to combine two clusters because of solid water boundaries
- if (r_viewcluster2 != r_viewcluster)
- {
- memcpy (fatvis, vis, (r_worldmodel->numleafs+7)/8);
- vis = Mod_ClusterPVS (r_viewcluster2, r_worldmodel);
- c = (r_worldmodel->numleafs+31)/32;
- for (i=0 ; i<c ; i++)
- ((int *)fatvis)[i] |= ((int *)vis)[i];
- vis = fatvis;
- }
-
- for (i=0,leaf=r_worldmodel->leafs ; i<r_worldmodel->numleafs ; i++, leaf++)
- {
- cluster = leaf->cluster;
- if (cluster == -1)
- continue;
- if (vis[cluster>>3] & (1<<(cluster&7)))
- {
- node = (mnode_t *)leaf;
- do
- {
- if (node->visframe == r_visframecount)
- break;
- node->visframe = r_visframecount;
- node = node->parent;
- } while (node);
- }
- }
- }
-
-
-
- /*
- =============================================================================
-
- LIGHTMAP ALLOCATION
-
- =============================================================================
- */
-
- static void LM_InitBlock( void )
- {
- memset( gl_lms.allocated, 0, sizeof( gl_lms.allocated ) );
- }
-
- static void LM_UploadBlock( qboolean dynamic )
- {
- int texture;
- int height = 0;
-
- if ( dynamic )
- {
- texture = 0;
- }
- else
- {
- texture = gl_lms.current_lightmap_texture;
- }
-
- GL_Bind( gl_state.lightmap_textures + texture );
- qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- if ( dynamic )
- {
- int i;
-
- for ( i = 0; i < BLOCK_WIDTH; i++ )
- {
- if ( gl_lms.allocated[i] > height )
- height = gl_lms.allocated[i];
- }
-
- qglTexSubImage2D( GL_TEXTURE_2D,
- 0,
- 0, 0,
- BLOCK_WIDTH, height,
- GL_LIGHTMAP_FORMAT,
- GL_UNSIGNED_BYTE,
- gl_lms.lightmap_buffer );
- }
- else
- {
- qglTexImage2D( GL_TEXTURE_2D,
- 0,
- gl_lms.internal_format,
- BLOCK_WIDTH, BLOCK_HEIGHT,
- 0,
- GL_LIGHTMAP_FORMAT,
- GL_UNSIGNED_BYTE,
- gl_lms.lightmap_buffer );
- if ( ++gl_lms.current_lightmap_texture == MAX_LIGHTMAPS )
- Com_Error( ERR_DROP, "LM_UploadBlock() - MAX_LIGHTMAPS exceeded\n" );
- }
- }
-
- // returns a texture number and the position inside it
- static qboolean LM_AllocBlock (int w, int h, int *x, int *y)
- {
- int i, j;
- int best, best2;
-
- best = BLOCK_HEIGHT;
-
- for (i=0 ; i<BLOCK_WIDTH-w ; i++)
- {
- best2 = 0;
-
- for (j=0 ; j<w ; j++)
- {
- if (gl_lms.allocated[i+j] >= best)
- break;
- if (gl_lms.allocated[i+j] > best2)
- best2 = gl_lms.allocated[i+j];
- }
- if (j == w)
- { // this is a valid spot
- *x = i;
- *y = best = best2;
- }
- }
-
- if (best + h > BLOCK_HEIGHT)
- return false;
-
- for (i=0 ; i<w ; i++)
- gl_lms.allocated[*x + i] = best + h;
-
- return true;
- }
-
- /*
- ================
- GL_BuildPolygonFromSurface
- ================
- */
- void GL_BuildPolygonFromSurface(msurface_t *fa)
- {
- int i, lindex, lnumverts;
- medge_t *r_pedge;
- float *vec;
- float s, t;
- glpoly_t *poly;
-
- // reconstruct the polygon
- lnumverts = fa->numedges;
-
- //
- // draw texture
- //
- poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
- poly->next = fa->polys;
- poly->numverts = lnumverts;
- fa->polys = poly;
-
- for (i=0 ; i<lnumverts ; i++)
- {
- lindex = currentmodel->surfedges[fa->firstedge + i];
-
- if (lindex > 0)
- {
- r_pedge = ¤tmodel->edges[lindex];
- vec = currentmodel->vertexes[r_pedge->v[0]].position;
- }
- else
- {
- r_pedge = ¤tmodel->edges[-lindex];
- vec = currentmodel->vertexes[r_pedge->v[1]].position;
- }
-
- s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
- s /= fa->texinfo->image->width;
-
- t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
- t /= fa->texinfo->image->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;
- }
- }
-
- /*
- ========================
- GL_CreateSurfaceLightmap
- ========================
- */
- void GL_CreateSurfaceLightmap (msurface_t *surf)
- {
- int smax, tmax;
- byte *base;
-
- if (!surf->samples)
- return;
-
- if (surf->texinfo->flags & (SURF_SKY|SURF_WARP))
- return; //may not need this?
-
- smax = (surf->extents[0]>>4)+1;
- tmax = (surf->extents[1]>>4)+1;
-
- if ( !LM_AllocBlock( smax, tmax, &surf->light_s, &surf->light_t ) )
- {
- LM_UploadBlock( false );
- LM_InitBlock();
- if ( !LM_AllocBlock( smax, tmax, &surf->light_s, &surf->light_t ) )
- {
- Com_Error( ERR_FATAL, "Consecutive calls to LM_AllocBlock(%d,%d) failed\n", smax, tmax );
- }
- }
-
- surf->lightmaptexturenum = gl_lms.current_lightmap_texture;
-
- base = gl_lms.lightmap_buffer;
- base += (surf->light_t * BLOCK_WIDTH + surf->light_s) * LIGHTMAP_BYTES;
-
- R_SetCacheState( surf );
- R_BuildLightMap (surf, base, BLOCK_WIDTH*LIGHTMAP_BYTES);
- }
-
- /*
- ========================
- GL_CreateSurfaceStainmap
- ========================
- */
- void GL_CreateSurfaceStainmap (msurface_t *surf)
- {
- int smax, tmax;
-
- if (!surf->samples)
- return;
-
- smax = (surf->extents[0]>>4)+1;
- tmax = (surf->extents[1]>>4)+1;
-
- surf->stainsamples = Hunk_Alloc (smax*tmax*3);
- memset (surf->stainsamples, 255, smax*tmax*3);
- }
-
- /*
- ==================
- GL_BeginBuildingLightmaps
-
- ==================
- */
- void GL_BeginBuildingLightmaps (model_t *m)
- {
- static lightstyle_t lightstyles[MAX_LIGHTSTYLES];
- int i;
- unsigned dummy[128*128];
-
- memset( gl_lms.allocated, 0, sizeof(gl_lms.allocated) );
-
- r_framecount = 1; // no dlightcache
-
- GL_EnableMultitexture( true );
- GL_SelectTexture( GL_TEXTURE1);
-
- /*
- ** setup the base lightstyles so the lightmaps won't have to be regenerated
- ** the first time they're seen
- */
- for (i=0 ; i<MAX_LIGHTSTYLES ; i++)
- {
- lightstyles[i].rgb[0] = 1;
- lightstyles[i].rgb[1] = 1;
- lightstyles[i].rgb[2] = 1;
- lightstyles[i].white = 3;
- }
- r_newrefdef.lightstyles = lightstyles;
-
- if (!gl_state.lightmap_textures)
- gl_state.lightmap_textures = TEXNUM_LIGHTMAPS;
-
- gl_lms.current_lightmap_texture = 1;
-
- /*
- ** if mono lightmaps are enabled and we want to use alpha
- ** blending (a,1-a) then we're likely running on a 3DLabs
- ** Permedia2. In a perfect world we'd use a GL_ALPHA lightmap
- ** in order to conserve space and maximize bandwidth, however
- ** this isn't a perfect world.
- **
- ** So we have to use alpha lightmaps, but stored in GL_RGBA format,
- ** which means we only get 1/16th the color resolution we should when
- ** using alpha lightmaps. If we find another board that supports
- ** only alpha lightmaps but that can at least support the GL_ALPHA
- ** format then we should change this code to use real alpha maps.
- */
- if ( toupper( gl_monolightmap->string[0] ) == 'A' )
- {
- gl_lms.internal_format = gl_tex_alpha_format;
- }
- /*
- ** try to do hacked colored lighting with a blended texture
- */
- else if ( toupper( gl_monolightmap->string[0] ) == 'C' )
- {
- gl_lms.internal_format = gl_tex_alpha_format;
- }
- else if ( toupper( gl_monolightmap->string[0] ) == 'I' )
- {
- gl_lms.internal_format = GL_INTENSITY8;
- }
- else if ( toupper( gl_monolightmap->string[0] ) == 'L' )
- {
- gl_lms.internal_format = GL_LUMINANCE8;
- }
- else
- {
- gl_lms.internal_format = gl_tex_solid_format;
- }
-
- /*
- ** initialize the dynamic lightmap texture
- */
- GL_Bind( gl_state.lightmap_textures + 0 );
- qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- qglTexImage2D( GL_TEXTURE_2D,
- 0,
- gl_lms.internal_format,
- BLOCK_WIDTH, BLOCK_HEIGHT,
- 0,
- GL_LIGHTMAP_FORMAT,
- GL_UNSIGNED_BYTE,
- dummy );
- }
-
- /*
- =======================
- GL_EndBuildingLightmaps
- =======================
- */
- void GL_EndBuildingLightmaps (void)
- {
- LM_UploadBlock( false );
- GL_EnableMultitexture( false );
- }
-
-