gl_rsurf.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23 #include "r_shadow.h"
  24 #include "portals.h"
  25
  26 #define MAX_LIGHTMAP_SIZE 256
  27
  28 cvar_t r_ambient = {0, "r_ambient", "0", "brightens map, value is 0-128"};
  29 cvar_t r_lockpvs = {0, "r_lockpvs", "0", "disables pvs switching, allows you to walk around and inspect what is visible from a given location in the map (anything not visible from your current location will not be drawn)"};
  30 cvar_t r_lockvisibility = {0, "r_lockvisibility", "0", "disables visibility updates, allows you to walk around and inspect what is visible from a given viewpoint in the map (anything offscreen at the moment this is enabled will not be drawn)"};
  31 cvar_t r_useportalculling = {0, "r_useportalculling", "1", "improve framerate with r_novis 1 by using portal culling - still not as good as compiled visibility data in the map, but it helps (a value of 2 forces use of this even with vis data, which improves framerates in maps without too much complexity, but hurts in extremely complex maps, which is why 2 is not the default mode)"};
  32 cvar_t r_q3bsp_renderskydepth = {0, "r_q3bsp_renderskydepth", "0", "draws sky depth masking in q3 maps (as in q1 maps), this means for example that sky polygons can hide other things"};
  33
  34 /*
  35 ===============
  36 R_BuildLightMap
  37
  38 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  39 ===============
  40 */
  41 void R_BuildLightMap (const entity_render_t *ent, msurface_t *surface)
  42 {
  43         int smax, tmax, i, size, size3, maps, l;
  44         int *bl, scale;
  45         unsigned char *lightmap, *out, *stain;
  46         dp_model_t *model = ent->model;
  47         int *intblocklights;
  48         unsigned char *templight;
  49
  50         smax = (surface->lightmapinfo->extents[0]>>4)+1;
  51         tmax = (surface->lightmapinfo->extents[1]>>4)+1;
  52         size = smax*tmax;
  53         size3 = size*3;
  54
  55         r_refdef.stats.lightmapupdatepixels += size;
  56         r_refdef.stats.lightmapupdates++;
  57
  58         if (cl.buildlightmapmemorysize < size*sizeof(int[3]))
  59         {
  60                 cl.buildlightmapmemorysize = size*sizeof(int[3]);
  61                 if (cl.buildlightmapmemory)
  62                         Mem_Free(cl.buildlightmapmemory);
  63                 cl.buildlightmapmemory = (unsigned char *) Mem_Alloc(cls.levelmempool, cl.buildlightmapmemorysize);
  64         }
  65
  66         // these both point at the same buffer, templight is only used for final
  67         // processing and can replace the intblocklights data as it goes
  68         intblocklights = (int *)cl.buildlightmapmemory;
  69         templight = (unsigned char *)cl.buildlightmapmemory;
  70
  71         // update cached lighting info
  72         model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = false;
  73
  74         lightmap = surface->lightmapinfo->samples;
  75
  76 // set to full bright if no light data
  77         bl = intblocklights;
  78         if (!model->brushq1.lightdata)
  79         {
  80                 for (i = 0;i < size3;i++)
  81                         bl[i] = 128*256;
  82         }
  83         else
  84         {
  85 // clear to no light
  86                 memset(bl, 0, size3*sizeof(*bl));
  87
  88 // add all the lightmaps
  89                 if (lightmap)
  90                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3)
  91                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size3;i++)
  92                                         bl[i] += lightmap[i] * scale;
  93         }
  94
  95         stain = surface->lightmapinfo->stainsamples;
  96         bl = intblocklights;
  97         out = templight;
  98         // the >> 16 shift adjusts down 8 bits to account for the stainmap
  99         // scaling, and remaps the 0-65536 (2x overbright) to 0-256, it will
 100         // be doubled during rendering to achieve 2x overbright
 101         // (0 = 0.0, 128 = 1.0, 256 = 2.0)
 102         if (stain)
 103         {
 104                 for (i = 0;i < size;i++, bl += 3, stain += 3, out += 4)
 105                 {
 106                         l = (bl[0] * stain[0]) >> 16;out[2] = min(l, 255);
 107                         l = (bl[1] * stain[1]) >> 16;out[1] = min(l, 255);
 108                         l = (bl[2] * stain[2]) >> 16;out[0] = min(l, 255);
 109                         out[3] = 255;
 110                 }
 111         }
 112         else
 113         {
 114                 for (i = 0;i < size;i++, bl += 3, out += 4)
 115                 {
 116                         l = bl[0] >> 8;out[2] = min(l, 255);
 117                         l = bl[1] >> 8;out[1] = min(l, 255);
 118                         l = bl[2] >> 8;out[0] = min(l, 255);
 119                         out[3] = 255;
 120                 }
 121         }
 122
 123         R_UpdateTexture(surface->lightmaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 124
 125         // update the surface's deluxemap if it has one
 126         if (surface->deluxemaptexture != r_texture_blanknormalmap)
 127         {
 128                 vec3_t n;
 129                 unsigned char *normalmap = surface->lightmapinfo->nmapsamples;
 130                 lightmap = surface->lightmapinfo->samples;
 131                 // clear to no normalmap
 132                 bl = intblocklights;
 133                 memset(bl, 0, size3*sizeof(*bl));
 134                 // add all the normalmaps
 135                 if (lightmap && normalmap)
 136                 {
 137                         for (maps = 0;maps < MAXLIGHTMAPS && surface->lightmapinfo->styles[maps] != 255;maps++, lightmap += size3, normalmap += size3)
 138                         {
 139                                 for (scale = r_refdef.scene.lightstylevalue[surface->lightmapinfo->styles[maps]], i = 0;i < size;i++)
 140                                 {
 141                                         // add the normalmap with weighting proportional to the style's lightmap intensity
 142                                         l = (int)(VectorLength(lightmap + i*3) * scale);
 143                                         bl[i*3+0] += ((int)normalmap[i*3+0] - 128) * l;
 144                                         bl[i*3+1] += ((int)normalmap[i*3+1] - 128) * l;
 145                                         bl[i*3+2] += ((int)normalmap[i*3+2] - 128) * l;
 146                                 }
 147                         }
 148                 }
 149                 bl = intblocklights;
 150                 out = templight;
 151                 // we simply renormalize the weighted normals to get a valid deluxemap
 152                 for (i = 0;i < size;i++, bl += 3, out += 4)
 153                 {
 154                         VectorCopy(bl, n);
 155                         VectorNormalize(n);
 156                         l = (int)(n[0] * 128 + 128);out[2] = bound(0, l, 255);
 157                         l = (int)(n[1] * 128 + 128);out[1] = bound(0, l, 255);
 158                         l = (int)(n[2] * 128 + 128);out[0] = bound(0, l, 255);
 159                         out[3] = 255;
 160                 }
 161                 R_UpdateTexture(surface->deluxemaptexture, templight, surface->lightmapinfo->lightmaporigin[0], surface->lightmapinfo->lightmaporigin[1], smax, tmax);
 162         }
 163 }
 164
 165 void R_StainNode (mnode_t *node, dp_model_t *model, const vec3_t origin, float radius, const float fcolor[8])
 166 {
 167         float ndist, a, ratio, maxdist, maxdist2, maxdist3, invradius, sdtable[256], td, dist2;
 168         msurface_t *surface, *endsurface;
 169         int i, s, t, smax, tmax, smax3, impacts, impactt, stained;
 170         unsigned char *bl;
 171         vec3_t impact;
 172
 173         maxdist = radius * radius;
 174         invradius = 1.0f / radius;
 175
 176 loc0:
 177         if (!node->plane)
 178                 return;
 179         ndist = PlaneDiff(origin, node->plane);
 180         if (ndist > radius)
 181         {
 182                 node = node->children[0];
 183                 goto loc0;
 184         }
 185         if (ndist < -radius)
 186         {
 187                 node = node->children[1];
 188                 goto loc0;
 189         }
 190
 191         dist2 = ndist * ndist;
 192         maxdist3 = maxdist - dist2;
 193
 194         if (node->plane->type < 3)
 195         {
 196                 VectorCopy(origin, impact);
 197                 impact[node->plane->type] -= ndist;
 198         }
 199         else
 200         {
 201                 impact[0] = origin[0] - node->plane->normal[0] * ndist;
 202                 impact[1] = origin[1] - node->plane->normal[1] * ndist;
 203                 impact[2] = origin[2] - node->plane->normal[2] * ndist;
 204         }
 205
 206         for (surface = model->data_surfaces + node->firstsurface, endsurface = surface + node->numsurfaces;surface < endsurface;surface++)
 207         {
 208                 if (surface->lightmapinfo->stainsamples)
 209                 {
 210                         smax = (surface->lightmapinfo->extents[0] >> 4) + 1;
 211                         tmax = (surface->lightmapinfo->extents[1] >> 4) + 1;
 212
 213                         impacts = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[0]) + surface->lightmapinfo->texinfo->vecs[0][3] - surface->lightmapinfo->texturemins[0]);
 214                         impactt = (int)(DotProduct (impact, surface->lightmapinfo->texinfo->vecs[1]) + surface->lightmapinfo->texinfo->vecs[1][3] - surface->lightmapinfo->texturemins[1]);
 215
 216                         s = bound(0, impacts, smax * 16) - impacts;
 217                         t = bound(0, impactt, tmax * 16) - impactt;
 218                         i = (int)(s * s + t * t + dist2);
 219                         if ((i > maxdist) || (smax > (int)(sizeof(sdtable)/sizeof(sdtable[0])))) // smax overflow fix from Andreas Dehmel
 220                                 continue;
 221
 222                         // reduce calculations
 223                         for (s = 0, i = impacts; s < smax; s++, i -= 16)
 224                                 sdtable[s] = i * i + dist2;
 225
 226                         bl = surface->lightmapinfo->stainsamples;
 227                         smax3 = smax * 3;
 228                         stained = false;
 229
 230                         i = impactt;
 231                         for (t = 0;t < tmax;t++, i -= 16)
 232                         {
 233                                 td = i * i;
 234                                 // make sure some part of it is visible on this line
 235                                 if (td < maxdist3)
 236                                 {
 237                                         maxdist2 = maxdist - td;
 238                                         for (s = 0;s < smax;s++)
 239                                         {
 240                                                 if (sdtable[s] < maxdist2)
 241                                                 {
 242                                                         ratio = lhrandom(0.0f, 1.0f);
 243                                                         a = (fcolor[3] + ratio * fcolor[7]) * (1.0f - sqrt(sdtable[s] + td) * invradius);
 244                                                         if (a >= (1.0f / 64.0f))
 245                                                         {
 246                                                                 if (a > 1)
 247                                                                         a = 1;
 248                                                                 bl[0] = (unsigned char) ((float) bl[0] + a * ((fcolor[0] + ratio * fcolor[4]) - (float) bl[0]));
 249                                                                 bl[1] = (unsigned char) ((float) bl[1] + a * ((fcolor[1] + ratio * fcolor[5]) - (float) bl[1]));
 250                                                                 bl[2] = (unsigned char) ((float) bl[2] + a * ((fcolor[2] + ratio * fcolor[6]) - (float) bl[2]));
 251                                                                 stained = true;
 252                                                         }
 253                                                 }
 254                                                 bl += 3;
 255                                         }
 256                                 }
 257                                 else // skip line
 258                                         bl += smax3;
 259                         }
 260                         // force lightmap upload
 261                         if (stained)
 262                                 model->brushq1.lightmapupdateflags[surface - model->data_surfaces] = true;
 263                 }
 264         }
 265
 266         if (node->children[0]->plane)
 267         {
 268                 if (node->children[1]->plane)
 269                 {
 270                         R_StainNode(node->children[0], model, origin, radius, fcolor);
 271                         node = node->children[1];
 272                         goto loc0;
 273                 }
 274                 else
 275                 {
 276                         node = node->children[0];
 277                         goto loc0;
 278                 }
 279         }
 280         else if (node->children[1]->plane)
 281         {
 282                 node = node->children[1];
 283                 goto loc0;
 284         }
 285 }
 286
 287 void R_Stain (const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2)
 288 {
 289         int n;
 290         float fcolor[8];
 291         entity_render_t *ent;
 292         dp_model_t *model;
 293         vec3_t org;
 294         if (r_refdef.scene.worldmodel == NULL || !r_refdef.scene.worldmodel->brush.data_nodes || !r_refdef.scene.worldmodel->brushq1.lightdata)
 295                 return;
 296         fcolor[0] = cr1;
 297         fcolor[1] = cg1;
 298         fcolor[2] = cb1;
 299         fcolor[3] = ca1 * (1.0f / 64.0f);
 300         fcolor[4] = cr2 - cr1;
 301         fcolor[5] = cg2 - cg1;
 302         fcolor[6] = cb2 - cb1;
 303         fcolor[7] = (ca2 - ca1) * (1.0f / 64.0f);
 304
 305         R_StainNode(r_refdef.scene.worldmodel->brush.data_nodes + r_refdef.scene.worldmodel->brushq1.hulls[0].firstclipnode, r_refdef.scene.worldmodel, origin, radius, fcolor);
 306
 307         // look for embedded bmodels
 308         for (n = 0;n < cl.num_brushmodel_entities;n++)
 309         {
 310                 ent = &cl.entities[cl.brushmodel_entities[n]].render;
 311                 model = ent->model;
 312                 if (model && model->name[0] == '*')
 313                 {
 314                         if (model->brush.data_nodes)
 315                         {
 316                                 Matrix4x4_Transform(&ent->inversematrix, origin, org);
 317                                 R_StainNode(model->brush.data_nodes + model->brushq1.hulls[0].firstclipnode, model, org, radius, fcolor);
 318                         }
 319                 }
 320         }
 321 }
 322
 323
 324 /*
 325 =============================================================
 326
 327         BRUSH MODELS
 328
 329 =============================================================
 330 */
 331
 332 static void R_DrawPortal_Callback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
 333 {
 334         // due to the hacky nature of this function's parameters, this is never
 335         // called with a batch, so numsurfaces is always 1, and the surfacelist
 336         // contains only a leaf number for coloring purposes
 337         const mportal_t *portal = (mportal_t *)ent;
 338         qboolean isvis;
 339         int i, numpoints;
 340         float *v;
 341         float vertex3f[POLYGONELEMENTS_MAXPOINTS*3];
 342         CHECKGLERROR
 343         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 344         GL_DepthMask(false);
 345         GL_DepthRange(0, 1);
 346         GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
 347         GL_DepthTest(true);
 348         GL_CullFace(GL_NONE);
 349         R_Mesh_Matrix(&identitymatrix);
 350
 351         numpoints = min(portal->numpoints, POLYGONELEMENTS_MAXPOINTS);
 352
 353         R_Mesh_VertexPointer(vertex3f, 0, 0);
 354         R_Mesh_ColorPointer(NULL, 0, 0);
 355         R_Mesh_ResetTextureState();
 356         R_SetupGenericShader(false);
 357
 358         isvis = (portal->here->clusterindex >= 0 && portal->past->clusterindex >= 0 && portal->here->clusterindex != portal->past->clusterindex);
 359
 360         i = surfacelist[0] >> 1;
 361         GL_Color(((i & 0x0007) >> 0) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 362                          ((i & 0x0038) >> 3) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 363                          ((i & 0x01C0) >> 6) * (1.0f / 7.0f) * r_refdef.view.colorscale,
 364                          isvis ? 0.125f : 0.03125f);
 365         for (i = 0, v = vertex3f;i < numpoints;i++, v += 3)
 366                 VectorCopy(portal->points[i].position, v);
 367         R_Mesh_Draw(0, numpoints, 0, numpoints - 2, NULL, polygonelements, 0, 0);
 368 }
 369
 370 // LordHavoc: this is just a nice debugging tool, very slow
 371 void R_DrawPortals(void)
 372 {
 373         int i, leafnum;
 374         mportal_t *portal;
 375         float center[3], f;
 376         dp_model_t *model = r_refdef.scene.worldmodel;
 377         if (model == NULL)
 378                 return;
 379         for (leafnum = 0;leafnum < r_refdef.scene.worldmodel->brush.num_leafs;leafnum++)
 380         {
 381                 if (r_refdef.viewcache.world_leafvisible[leafnum])
 382                 {
 383                         //for (portalnum = 0, portal = model->brush.data_portals;portalnum < model->brush.num_portals;portalnum++, portal++)
 384                         for (portal = r_refdef.scene.worldmodel->brush.data_leafs[leafnum].portals;portal;portal = portal->next)
 385                         {
 386                                 if (portal->numpoints <= POLYGONELEMENTS_MAXPOINTS)
 387                                 if (!R_CullBox(portal->mins, portal->maxs))
 388                                 {
 389                                         VectorClear(center);
 390                                         for (i = 0;i < portal->numpoints;i++)
 391                                                 VectorAdd(center, portal->points[i].position, center);
 392                                         f = ixtable[portal->numpoints];
 393                                         VectorScale(center, f, center);
 394                                         R_MeshQueue_AddTransparent(center, R_DrawPortal_Callback, (entity_render_t *)portal, leafnum, rsurface.rtlight);
 395                                 }
 396                         }
 397                 }
 398         }
 399 }
 400
 401 void R_View_WorldVisibility(qboolean forcenovis)
 402 {
 403         int i, j, *mark;
 404         mleaf_t *leaf;
 405         mleaf_t *viewleaf;
 406         dp_model_t *model = r_refdef.scene.worldmodel;
 407
 408         if (!model)
 409                 return;
 410
 411         if (r_refdef.view.usecustompvs)
 412         {
 413                 // clear the visible surface and leaf flags arrays
 414                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 415                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 416                 r_refdef.viewcache.world_novis = false;
 417
 418                 // simply cull each marked leaf to the frustum (view pyramid)
 419                 for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 420                 {
 421                         // if leaf is in current pvs and on the screen, mark its surfaces
 422                         if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 423                         {
 424                                 r_refdef.stats.world_leafs++;
 425                                 r_refdef.viewcache.world_leafvisible[j] = true;
 426                                 if (leaf->numleafsurfaces)
 427                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 428                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 429                         }
 430                 }
 431                 return;
 432         }
 433
 434         // if possible find the leaf the view origin is in
 435         viewleaf = model->brush.PointInLeaf ? model->brush.PointInLeaf(model, r_refdef.view.origin) : NULL;
 436         // if possible fetch the visible cluster bits
 437         if (!r_lockpvs.integer && model->brush.FatPVS)
 438                 model->brush.FatPVS(model, r_refdef.view.origin, 2, r_refdef.viewcache.world_pvsbits, sizeof(r_refdef.viewcache.world_pvsbits), false);
 439
 440         if (!r_lockvisibility.integer)
 441         {
 442                 // clear the visible surface and leaf flags arrays
 443                 memset(r_refdef.viewcache.world_surfacevisible, 0, model->num_surfaces);
 444                 memset(r_refdef.viewcache.world_leafvisible, 0, model->brush.num_leafs);
 445
 446                 r_refdef.viewcache.world_novis = false;
 447
 448                 // if floating around in the void (no pvs data available, and no
 449                 // portals available), simply use all on-screen leafs.
 450                 if (!viewleaf || viewleaf->clusterindex < 0 || forcenovis)
 451                 {
 452                         // no visibility method: (used when floating around in the void)
 453                         // simply cull each leaf to the frustum (view pyramid)
 454                         // similar to quake's RecursiveWorldNode but without cache misses
 455                         r_refdef.viewcache.world_novis = true;
 456                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 457                         {
 458                                 // if leaf is in current pvs and on the screen, mark its surfaces
 459                                 if (!R_CullBox(leaf->mins, leaf->maxs))
 460                                 {
 461                                         r_refdef.stats.world_leafs++;
 462                                         r_refdef.viewcache.world_leafvisible[j] = true;
 463                                         if (leaf->numleafsurfaces)
 464                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 465                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 466                                 }
 467                         }
 468                 }
 469                 // just check if each leaf in the PVS is on screen
 470                 // (unless portal culling is enabled)
 471                 else if (!model->brush.data_portals || r_useportalculling.integer < 1 || (r_useportalculling.integer < 2 && !r_novis.integer))
 472                 {
 473                         // pvs method:
 474                         // simply check if each leaf is in the Potentially Visible Set,
 475                         // and cull to frustum (view pyramid)
 476                         // similar to quake's RecursiveWorldNode but without cache misses
 477                         for (j = 0, leaf = model->brush.data_leafs;j < model->brush.num_leafs;j++, leaf++)
 478                         {
 479                                 // if leaf is in current pvs and on the screen, mark its surfaces
 480                                 if (CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, leaf->clusterindex) && !R_CullBox(leaf->mins, leaf->maxs))
 481                                 {
 482                                         r_refdef.stats.world_leafs++;
 483                                         r_refdef.viewcache.world_leafvisible[j] = true;
 484                                         if (leaf->numleafsurfaces)
 485                                                 for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 486                                                         r_refdef.viewcache.world_surfacevisible[*mark] = true;
 487                                 }
 488                         }
 489                 }
 490                 // if desired use a recursive portal flow, culling each portal to
 491                 // frustum and checking if the leaf the portal leads to is in the pvs
 492                 else
 493                 {
 494                         int leafstackpos;
 495                         mportal_t *p;
 496                         mleaf_t *leafstack[8192];
 497                         // simple-frustum portal method:
 498                         // follows portals leading outward from viewleaf, does not venture
 499                         // offscreen or into leafs that are not visible, faster than
 500                         // Quake's RecursiveWorldNode and vastly better in unvised maps,
 501                         // often culls some surfaces that pvs alone would miss
 502                         // (such as a room in pvs that is hidden behind a wall, but the
 503                         //  passage leading to the room is off-screen)
 504                         leafstack[0] = viewleaf;
 505                         leafstackpos = 1;
 506                         while (leafstackpos)
 507                         {
 508                                 leaf = leafstack[--leafstackpos];
 509                                 if (r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs])
 510                                         continue;
 511                                 r_refdef.stats.world_leafs++;
 512                                 r_refdef.viewcache.world_leafvisible[leaf - model->brush.data_leafs] = true;
 513                                 // mark any surfaces bounding this leaf
 514                                 if (leaf->numleafsurfaces)
 515                                         for (i = 0, mark = leaf->firstleafsurface;i < leaf->numleafsurfaces;i++, mark++)
 516                                                 r_refdef.viewcache.world_surfacevisible[*mark] = true;
 517                                 // follow portals into other leafs
 518                                 // the checks are:
 519                                 // if viewer is behind portal (portal faces outward into the scene)
 520                                 // and the portal polygon's bounding box is on the screen
 521                                 // and the leaf has not been visited yet
 522                                 // and the leaf is visible in the pvs
 523                                 // (the first two checks won't cause as many cache misses as the leaf checks)
 524                                 for (p = leaf->portals;p;p = p->next)
 525                                 {
 526                                         r_refdef.stats.world_portals++;
 527                                         if (DotProduct(r_refdef.view.origin, p->plane.normal) < (p->plane.dist + 1)
 528                                          && !r_refdef.viewcache.world_leafvisible[p->past - model->brush.data_leafs]
 529                                          && CHECKPVSBIT(r_refdef.viewcache.world_pvsbits, p->past->clusterindex)
 530                                          && !R_CullBox(p->mins, p->maxs)
 531                                          && leafstackpos < (int)(sizeof(leafstack) / sizeof(leafstack[0])))
 532                                                 leafstack[leafstackpos++] = p->past;
 533                                 }
 534                         }
 535                 }
 536         }
 537 }
 538
 539 void R_Q1BSP_DrawSky(entity_render_t *ent)
 540 {
 541         if (ent->model == NULL)
 542                 return;
 543         if (ent == r_refdef.scene.worldentity)
 544                 R_DrawWorldSurfaces(true, true, false, false);
 545         else
 546                 R_DrawModelSurfaces(ent, true, true, false, false);
 547 }
 548
 549 extern void R_Water_AddWaterPlane(msurface_t *surface);
 550 void R_Q1BSP_DrawAddWaterPlanes(entity_render_t *ent)
 551 {
 552         int i, j, flagsmask;
 553         dp_model_t *model = ent->model;
 554         msurface_t *surfaces;
 555         if (model == NULL)
 556                 return;
 557
 558         if (ent == r_refdef.scene.worldentity)
 559                 RSurf_ActiveWorldEntity();
 560         else
 561                 RSurf_ActiveModelEntity(ent, false, false);
 562
 563         surfaces = model->data_surfaces;
 564         flagsmask = MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION;
 565
 566         // add visible surfaces to draw list
 567         if (ent == r_refdef.scene.worldentity)
 568         {
 569                 for (i = 0;i < model->nummodelsurfaces;i++)
 570                 {
 571                         j = model->sortedmodelsurfaces[i];
 572                         if (r_refdef.viewcache.world_surfacevisible[j])
 573                                 if (surfaces[j].texture->basematerialflags & flagsmask)
 574                                         R_Water_AddWaterPlane(surfaces + j);
 575                 }
 576         }
 577         else
 578         {
 579                 for (i = 0;i < model->nummodelsurfaces;i++)
 580                 {
 581                         j = model->sortedmodelsurfaces[i];
 582                         if (surfaces[j].texture->basematerialflags & flagsmask)
 583                                 R_Water_AddWaterPlane(surfaces + j);
 584                 }
 585         }
 586         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
 587 }
 588
 589 void R_Q1BSP_Draw(entity_render_t *ent)
 590 {
 591         dp_model_t *model = ent->model;
 592         if (model == NULL)
 593                 return;
 594         if (ent == r_refdef.scene.worldentity)
 595                 R_DrawWorldSurfaces(false, true, false, false);
 596         else
 597                 R_DrawModelSurfaces(ent, false, true, false, false);
 598 }
 599
 600 void R_Q1BSP_DrawDepth(entity_render_t *ent)
 601 {
 602         dp_model_t *model = ent->model;
 603         if (model == NULL)
 604                 return;
 605         GL_ColorMask(0,0,0,0);
 606         GL_Color(1,1,1,1);
 607         GL_DepthTest(true);
 608         GL_BlendFunc(GL_ONE, GL_ZERO);
 609         GL_DepthMask(true);
 610         GL_AlphaTest(false);
 611         R_Mesh_ColorPointer(NULL, 0, 0);
 612         R_Mesh_ResetTextureState();
 613         R_SetupDepthOrShadowShader();
 614         if (ent == r_refdef.scene.worldentity)
 615                 R_DrawWorldSurfaces(false, false, true, false);
 616         else
 617                 R_DrawModelSurfaces(ent, false, false, true, false);
 618         GL_ColorMask(r_refdef.view.colormask[0], r_refdef.view.colormask[1], r_refdef.view.colormask[2], 1);
 619 }
 620
 621 void R_Q1BSP_DrawDebug(entity_render_t *ent)
 622 {
 623         if (ent->model == NULL)
 624                 return;
 625         if (ent == r_refdef.scene.worldentity)
 626                 R_DrawWorldSurfaces(false, false, false, true);
 627         else
 628                 R_DrawModelSurfaces(ent, false, false, false, true);
 629 }
 630
 631 typedef struct r_q1bsp_getlightinfo_s
 632 {
 633         dp_model_t *model;
 634         vec3_t relativelightorigin;
 635         float lightradius;
 636         int *outleaflist;
 637         unsigned char *outleafpvs;
 638         int outnumleafs;
 639         unsigned char *visitingleafpvs;
 640         int *outsurfacelist;
 641         unsigned char *outsurfacepvs;
 642         unsigned char *tempsurfacepvs;
 643         unsigned char *outshadowtrispvs;
 644         unsigned char *outlighttrispvs;
 645         int outnumsurfaces;
 646         vec3_t outmins;
 647         vec3_t outmaxs;
 648         vec3_t lightmins;
 649         vec3_t lightmaxs;
 650         const unsigned char *pvs;
 651         qboolean svbsp_active;
 652         qboolean svbsp_insertoccluder;
 653 }
 654 r_q1bsp_getlightinfo_t;
 655
 656 static void R_Q1BSP_RecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, mnode_t *node)
 657 {
 658         int sides;
 659         mleaf_t *leaf;
 660         for (;;)
 661         {
 662                 mplane_t *plane = node->plane;
 663                 //if (!BoxesOverlap(info->lightmins, info->lightmaxs, node->mins, node->maxs))
 664                 //      return;
 665                 if (!plane)
 666                         break;
 667                 //if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 668                 //      return;
 669                 if (plane->type < 3)
 670                 {
 671                         if (info->lightmins[plane->type] > plane->dist)
 672                                 node = node->children[0];
 673                         else if (info->lightmaxs[plane->type] < plane->dist)
 674                                 node = node->children[1];
 675                         else if (info->relativelightorigin[plane->type] >= plane->dist)
 676                         {
 677                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 678                                 node = node->children[1];
 679                         }
 680                         else
 681                         {
 682                                 R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 683                                 node = node->children[0];
 684                         }
 685                 }
 686                 else
 687                 {
 688                         sides = BoxOnPlaneSide(info->lightmins, info->lightmaxs, plane);
 689                         if (sides == 3)
 690                         {
 691                                 // recurse front side first because the svbsp building prefers it
 692                                 if (PlaneDist(info->relativelightorigin, plane) >= 0)
 693                                 {
 694                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[0]);
 695                                         node = node->children[1];
 696                                 }
 697                                 else
 698                                 {
 699                                         R_Q1BSP_RecursiveGetLightInfo(info, node->children[1]);
 700                                         node = node->children[0];
 701                                 }
 702                         }
 703                         else if (sides == 0)
 704                                 return; // ERROR: NAN bounding box!
 705                         else
 706                                 node = node->children[sides - 1];
 707                 }
 708         }
 709         if (!r_shadow_compilingrtlight && R_CullBoxCustomPlanes(node->mins, node->maxs, rsurface.rtlight_numfrustumplanes, rsurface.rtlight_frustumplanes))
 710                 return;
 711         leaf = (mleaf_t *)node;
 712         if (info->svbsp_active)
 713         {
 714                 int i;
 715                 mportal_t *portal;
 716                 double points[128][3];
 717                 for (portal = leaf->portals;portal;portal = portal->next)
 718                 {
 719                         for (i = 0;i < portal->numpoints;i++)
 720                                 VectorCopy(portal->points[i].position, points[i]);
 721                         if (SVBSP_AddPolygon(&r_svbsp, portal->numpoints, points[0], false, NULL, NULL, 0) & 2)
 722                                 break;
 723                 }
 724                 if (portal == NULL)
 725                         return; // no portals of this leaf visible
 726         }
 727         else
 728         {
 729                 if (r_shadow_frontsidecasting.integer && info->pvs != NULL && !CHECKPVSBIT(info->pvs, leaf->clusterindex))
 730                         return;
 731         }
 732         // inserting occluders does not alter the leaf info
 733         if (!info->svbsp_insertoccluder)
 734         {
 735                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 736                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 737                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 738                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 739                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 740                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 741                 if (info->outleafpvs)
 742                 {
 743                         int leafindex = leaf - info->model->brush.data_leafs;
 744                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 745                         {
 746                                 SETPVSBIT(info->outleafpvs, leafindex);
 747                                 info->outleaflist[info->outnumleafs++] = leafindex;
 748                         }
 749                 }
 750         }
 751         if (info->outsurfacepvs)
 752         {
 753                 int leafsurfaceindex;
 754                 int surfaceindex;
 755                 int triangleindex, t;
 756                 int currentmaterialflags;
 757                 msurface_t *surface;
 758                 const int *e;
 759                 const vec_t *v[3];
 760                 double v2[3][3];
 761                 for (leafsurfaceindex = 0;leafsurfaceindex < leaf->numleafsurfaces;leafsurfaceindex++)
 762                 {
 763                         surfaceindex = leaf->firstleafsurface[leafsurfaceindex];
 764                         if (!CHECKPVSBIT(info->outsurfacepvs, surfaceindex))
 765                         {
 766                                 surface = info->model->data_surfaces + surfaceindex;
 767                                 currentmaterialflags = R_GetCurrentTexture(surface->texture)->currentmaterialflags;
 768                                 if (BoxesOverlap(info->lightmins, info->lightmaxs, surface->mins, surface->maxs)
 769                                  && (!info->svbsp_insertoccluder || !(currentmaterialflags & MATERIALFLAG_NOSHADOW)))
 770                                 {
 771                                         qboolean addedtris = false;
 772                                         qboolean insidebox = BoxInsideBox(surface->mins, surface->maxs, info->lightmins, info->lightmaxs);
 773                                         for (triangleindex = 0, t = surface->num_firstshadowmeshtriangle, e = info->model->brush.shadowmesh->element3i + t * 3;triangleindex < surface->num_triangles;triangleindex++, t++, e += 3)
 774                                         {
 775                                                 v[0] = info->model->brush.shadowmesh->vertex3f + e[0] * 3;
 776                                                 v[1] = info->model->brush.shadowmesh->vertex3f + e[1] * 3;
 777                                                 v[2] = info->model->brush.shadowmesh->vertex3f + e[2] * 3;
 778                                                 if (insidebox || TriangleOverlapsBox(v[0], v[1], v[2], info->lightmins, info->lightmaxs))
 779                                                 {
 780                                                         if (info->svbsp_insertoccluder)
 781                                                         {
 782                                                                 if (!(currentmaterialflags & MATERIALFLAG_NOCULLFACE) && r_shadow_frontsidecasting.integer != PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 783                                                                         continue;
 784                                                                 if (currentmaterialflags & MATERIALFLAG_NOSHADOW)
 785                                                                         continue;
 786                                                                 VectorCopy(v[0], v2[0]);
 787                                                                 VectorCopy(v[1], v2[1]);
 788                                                                 VectorCopy(v[2], v2[2]);
 789                                                                 if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], true, NULL, NULL, 0) & 2))
 790                                                                         continue;
 791                                                                 addedtris = true;
 792                                                         }
 793                                                         else
 794                                                         {
 795                                                                 if (info->svbsp_active)
 796                                                                 {
 797                                                                         VectorCopy(v[0], v2[0]);
 798                                                                         VectorCopy(v[1], v2[1]);
 799                                                                         VectorCopy(v[2], v2[2]);
 800                                                                         if (!(SVBSP_AddPolygon(&r_svbsp, 3, v2[0], false, NULL, NULL, 0) & 2))
 801                                                                                 continue;
 802                                                                 }
 803                                                                 if (currentmaterialflags & MATERIALFLAG_NOCULLFACE)
 804                                                                 {
 805                                                                         // if the material is double sided we
 806                                                                         // can't cull by direction
 807                                                                         SETPVSBIT(info->outlighttrispvs, t);
 808                                                                         addedtris = true;
 809                                                                         if (!(currentmaterialflags & MATERIALFLAG_NOSHADOW))
 810                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 811                                                                 }
 812                                                                 else if (r_shadow_frontsidecasting.integer)
 813                                                                 {
 814                                                                         // front side casting occludes backfaces,
 815                                                                         // so they are completely useless as both
 816                                                                         // casters and lit polygons
 817                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]))
 818                                                                                 continue;
 819                                                                         SETPVSBIT(info->outlighttrispvs, t);
 820                                                                         addedtris = true;
 821                                                                         if (!(currentmaterialflags & MATERIALFLAG_NOSHADOW))
 822                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 823                                                                 }
 824                                                                 else
 825                                                                 {
 826                                                                         // back side casting does not occlude
 827                                                                         // anything so we can't cull lit polygons
 828                                                                         SETPVSBIT(info->outlighttrispvs, t);
 829                                                                         addedtris = true;
 830                                                                         if (!PointInfrontOfTriangle(info->relativelightorigin, v[0], v[1], v[2]) && !(currentmaterialflags & MATERIALFLAG_NOSHADOW))
 831                                                                                 SETPVSBIT(info->outshadowtrispvs, t);
 832                                                                 }
 833                                                         }
 834                                                 }
 835                                         }
 836                                         if (addedtris)
 837                                         {
 838                                                 SETPVSBIT(info->outsurfacepvs, surfaceindex);
 839                                                 info->outsurfacelist[info->outnumsurfaces++] = surfaceindex;
 840                                         }
 841                                 }
 842                         }
 843                 }
 844         }
 845 }
 846
 847 static void R_Q1BSP_CallRecursiveGetLightInfo(r_q1bsp_getlightinfo_t *info, qboolean use_svbsp)
 848 {
 849         if (use_svbsp)
 850         {
 851                 double origin[3];
 852                 VectorCopy(info->relativelightorigin, origin);
 853                 if (!r_svbsp.nodes)
 854                 {
 855                         r_svbsp.maxnodes = max(r_svbsp.maxnodes, 1<<18);
 856                         r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(r_main_mempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 857                 }
 858                 info->svbsp_active = true;
 859                 info->svbsp_insertoccluder = true;
 860                 for (;;)
 861                 {
 862                         SVBSP_Init(&r_svbsp, origin, r_svbsp.maxnodes, r_svbsp.nodes);
 863                         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 864                         // if that failed, retry with more nodes
 865                         if (r_svbsp.ranoutofnodes)
 866                         {
 867                                 // an upper limit is imposed
 868                                 if (r_svbsp.maxnodes >= 2<<22)
 869                                         break;
 870                                 Mem_Free(r_svbsp.nodes);
 871                                 r_svbsp.maxnodes *= 2;
 872                                 r_svbsp.nodes = (svbsp_node_t*) Mem_Alloc(tempmempool, r_svbsp.maxnodes * sizeof(svbsp_node_t));
 873                         }
 874                         else
 875                                 break;
 876                 }
 877                 // now clear the surfacepvs array because we need to redo it
 878                 memset(info->outsurfacepvs, 0, (info->model->nummodelsurfaces + 7) >> 3);
 879                 info->outnumsurfaces = 0;
 880         }
 881         else
 882                 info->svbsp_active = false;
 883
 884         // we HAVE to mark the leaf the light is in as lit, because portals are
 885         // irrelevant to a leaf that the light source is inside of
 886         // (and they are all facing away, too)
 887         {
 888                 mnode_t *node = info->model->brush.data_nodes;
 889                 mleaf_t *leaf;
 890                 while (node->plane)
 891                         node = node->children[(node->plane->type < 3 ? info->relativelightorigin[node->plane->type] : DotProduct(info->relativelightorigin,node->plane->normal)) < node->plane->dist];
 892                 leaf = (mleaf_t *)node;
 893                 info->outmins[0] = min(info->outmins[0], leaf->mins[0]);
 894                 info->outmins[1] = min(info->outmins[1], leaf->mins[1]);
 895                 info->outmins[2] = min(info->outmins[2], leaf->mins[2]);
 896                 info->outmaxs[0] = max(info->outmaxs[0], leaf->maxs[0]);
 897                 info->outmaxs[1] = max(info->outmaxs[1], leaf->maxs[1]);
 898                 info->outmaxs[2] = max(info->outmaxs[2], leaf->maxs[2]);
 899                 if (info->outleafpvs)
 900                 {
 901                         int leafindex = leaf - info->model->brush.data_leafs;
 902                         if (!CHECKPVSBIT(info->outleafpvs, leafindex))
 903                         {
 904                                 SETPVSBIT(info->outleafpvs, leafindex);
 905                                 info->outleaflist[info->outnumleafs++] = leafindex;
 906                         }
 907                 }
 908         }
 909
 910         info->svbsp_insertoccluder = false;
 911         R_Q1BSP_RecursiveGetLightInfo(info, info->model->brush.data_nodes);
 912         if (developer.integer >= 100 && use_svbsp)
 913         {
 914                 Con_Printf("GetLightInfo: svbsp built with %i nodes, polygon stats:\n", r_svbsp.numnodes);
 915                 Con_Printf("occluders: %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_occluders_accepted, r_svbsp.stat_occluders_rejected, r_svbsp.stat_occluders_fragments_accepted, r_svbsp.stat_occluders_fragments_rejected);
 916                 Con_Printf("queries  : %i accepted, %i rejected, %i fragments accepted, %i fragments rejected.\n", r_svbsp.stat_queries_accepted, r_svbsp.stat_queries_rejected, r_svbsp.stat_queries_fragments_accepted, r_svbsp.stat_queries_fragments_rejected);
 917         }
 918 }
 919
 920 void R_Q1BSP_GetLightInfo(entity_render_t *ent, vec3_t relativelightorigin, float lightradius, vec3_t outmins, vec3_t outmaxs, int *outleaflist, unsigned char *outleafpvs, int *outnumleafspointer, int *outsurfacelist, unsigned char *outsurfacepvs, int *outnumsurfacespointer, unsigned char *outshadowtrispvs, unsigned char *outlighttrispvs, unsigned char *visitingleafpvs)
 921 {
 922         r_q1bsp_getlightinfo_t info;
 923         VectorCopy(relativelightorigin, info.relativelightorigin);
 924         info.lightradius = lightradius;
 925         info.lightmins[0] = info.relativelightorigin[0] - info.lightradius;
 926         info.lightmins[1] = info.relativelightorigin[1] - info.lightradius;
 927         info.lightmins[2] = info.relativelightorigin[2] - info.lightradius;
 928         info.lightmaxs[0] = info.relativelightorigin[0] + info.lightradius;
 929         info.lightmaxs[1] = info.relativelightorigin[1] + info.lightradius;
 930         info.lightmaxs[2] = info.relativelightorigin[2] + info.lightradius;
 931         if (ent->model == NULL)
 932         {
 933                 VectorCopy(info.lightmins, outmins);
 934                 VectorCopy(info.lightmaxs, outmaxs);
 935                 *outnumleafspointer = 0;
 936                 *outnumsurfacespointer = 0;
 937                 return;
 938         }
 939         info.model = ent->model;
 940         info.outleaflist = outleaflist;
 941         info.outleafpvs = outleafpvs;
 942         info.outnumleafs = 0;
 943         info.visitingleafpvs = visitingleafpvs;
 944         info.outsurfacelist = outsurfacelist;
 945         info.outsurfacepvs = outsurfacepvs;
 946         info.outshadowtrispvs = outshadowtrispvs;
 947         info.outlighttrispvs = outlighttrispvs;
 948         info.outnumsurfaces = 0;
 949         VectorCopy(info.relativelightorigin, info.outmins);
 950         VectorCopy(info.relativelightorigin, info.outmaxs);
 951         memset(visitingleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 952         memset(outleafpvs, 0, (info.model->brush.num_leafs + 7) >> 3);
 953         memset(outsurfacepvs, 0, (info.model->nummodelsurfaces + 7) >> 3);
 954         if (info.model->brush.shadowmesh)
 955                 memset(outshadowtrispvs, 0, (info.model->brush.shadowmesh->numtriangles + 7) >> 3);
 956         else
 957                 memset(outshadowtrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 958         memset(outlighttrispvs, 0, (info.model->surfmesh.num_triangles + 7) >> 3);
 959         if (info.model->brush.GetPVS && r_shadow_frontsidecasting.integer)
 960                 info.pvs = info.model->brush.GetPVS(info.model, info.relativelightorigin);
 961         else
 962                 info.pvs = NULL;
 963         RSurf_ActiveWorldEntity();
 964
 965         if (r_shadow_frontsidecasting.integer && r_shadow_compilingrtlight && r_shadow_realtime_world_compileportalculling.integer && info.model->brush.data_portals)
 966         {
 967                 // use portal recursion for exact light volume culling, and exact surface checking
 968                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, true, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
 969         }
 970         else if (r_shadow_frontsidecasting.integer && r_shadow_realtime_dlight_portalculling.integer && info.model->brush.data_portals)
 971         {
 972                 // use portal recursion for exact light volume culling, but not the expensive exact surface checking
 973                 Portal_Visibility(info.model, info.relativelightorigin, info.outleaflist, info.outleafpvs, &info.outnumleafs, info.outsurfacelist, info.outsurfacepvs, &info.outnumsurfaces, NULL, 0, r_shadow_realtime_dlight_portalculling.integer >= 2, info.lightmins, info.lightmaxs, info.outmins, info.outmaxs, info.outshadowtrispvs, info.outlighttrispvs, info.visitingleafpvs);
 974         }
 975         else
 976         {
 977                 // recurse the bsp tree, checking leafs and surfaces for visibility
 978                 // optionally using svbsp for exact culling of compiled lights
 979                 // (or if the user enables dlight svbsp culling, which is mostly for
 980                 //  debugging not actual use)
 981                 R_Q1BSP_CallRecursiveGetLightInfo(&info, (r_shadow_compilingrtlight ? r_shadow_realtime_world_compilesvbsp.integer : r_shadow_realtime_dlight_svbspculling.integer) != 0);
 982         }
 983
 984         rsurface.entity = NULL; // used only by R_GetCurrentTexture and RSurf_ActiveWorldEntity/RSurf_ActiveModelEntity
 985
 986         // limit combined leaf box to light boundaries
 987         outmins[0] = max(info.outmins[0] - 1, info.lightmins[0]);
 988         outmins[1] = max(info.outmins[1] - 1, info.lightmins[1]);
 989         outmins[2] = max(info.outmins[2] - 1, info.lightmins[2]);
 990         outmaxs[0] = min(info.outmaxs[0] + 1, info.lightmaxs[0]);
 991         outmaxs[1] = min(info.outmaxs[1] + 1, info.lightmaxs[1]);
 992         outmaxs[2] = min(info.outmaxs[2] + 1, info.lightmaxs[2]);
 993
 994         *outnumleafspointer = info.outnumleafs;
 995         *outnumsurfacespointer = info.outnumsurfaces;
 996 }
 997
 998 void R_Q1BSP_CompileShadowVolume(entity_render_t *ent, vec3_t relativelightorigin, vec3_t relativelightdirection, float lightradius, int numsurfaces, const int *surfacelist)
 999 {
1000         dp_model_t *model = ent->model;
1001         msurface_t *surface;
1002         int surfacelistindex;
1003         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1004         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Begin(r_main_mempool, 32768, 32768, NULL, NULL, NULL, false, false, true);
1005         R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1006         for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
1007         {
1008                 surface = model->data_surfaces + surfacelist[surfacelistindex];
1009                 if (surface->texture->basematerialflags & MATERIALFLAG_NOSHADOW)
1010                         continue;
1011                 R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, r_shadow_compilingrtlight->cullmins, r_shadow_compilingrtlight->cullmaxs, surface->mins, surface->maxs);
1012         }
1013         R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1014         r_shadow_compilingrtlight->static_meshchain_shadow_zfail = Mod_ShadowMesh_Finish(r_main_mempool, r_shadow_compilingrtlight->static_meshchain_shadow_zfail, false, false, true);
1015 }
1016
1017 extern cvar_t r_polygonoffset_submodel_factor;
1018 extern cvar_t r_polygonoffset_submodel_offset;
1019 void R_Q1BSP_DrawShadowVolume(entity_render_t *ent, const vec3_t relativelightorigin, const vec3_t relativelightdirection, float lightradius, int modelnumsurfaces, const int *modelsurfacelist, const vec3_t lightmins, const vec3_t lightmaxs)
1020 {
1021         dp_model_t *model = ent->model;
1022         msurface_t *surface;
1023         int modelsurfacelistindex;
1024         float projectdistance = relativelightdirection ? lightradius : lightradius + model->radius*2 + r_shadow_projectdistance.value;
1025         // check the box in modelspace, it was already checked in worldspace
1026         if (!BoxesOverlap(model->normalmins, model->normalmaxs, lightmins, lightmaxs))
1027                 return;
1028         if (ent->model->brush.submodel)
1029                 GL_PolygonOffset(r_refdef.shadowpolygonfactor + r_polygonoffset_submodel_factor.value, r_refdef.shadowpolygonoffset + r_polygonoffset_submodel_offset.value);
1030         if (model->brush.shadowmesh)
1031         {
1032                 R_Shadow_PrepareShadowMark(model->brush.shadowmesh->numtriangles);
1033                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1034                 {
1035                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1036                         if (R_GetCurrentTexture(surface->texture)->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1037                                 continue;
1038                         R_Shadow_MarkVolumeFromBox(surface->num_firstshadowmeshtriangle, surface->num_triangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1039                 }
1040                 R_Shadow_VolumeFromList(model->brush.shadowmesh->numverts, model->brush.shadowmesh->numtriangles, model->brush.shadowmesh->vertex3f, model->brush.shadowmesh->element3i, model->brush.shadowmesh->neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1041         }
1042         else
1043         {
1044                 projectdistance = lightradius + model->radius*2;
1045                 R_Shadow_PrepareShadowMark(model->surfmesh.num_triangles);
1046                 // identify lit faces within the bounding box
1047                 for (modelsurfacelistindex = 0;modelsurfacelistindex < modelnumsurfaces;modelsurfacelistindex++)
1048                 {
1049                         surface = model->data_surfaces + modelsurfacelist[modelsurfacelistindex];
1050                         rsurface.texture = R_GetCurrentTexture(surface->texture);
1051                         if (rsurface.texture->currentmaterialflags & MATERIALFLAG_NOSHADOW)
1052                                 continue;
1053                         RSurf_PrepareVerticesForBatch(false, false, 1, &surface);
1054                         R_Shadow_MarkVolumeFromBox(surface->num_firsttriangle, surface->num_triangles, rsurface.vertex3f, rsurface.modelelement3i, relativelightorigin, relativelightdirection, lightmins, lightmaxs, surface->mins, surface->maxs);
1055                 }
1056                 R_Shadow_VolumeFromList(model->surfmesh.num_vertices, model->surfmesh.num_triangles, rsurface.vertex3f, model->surfmesh.data_element3i, model->surfmesh.data_neighbor3i, relativelightorigin, relativelightdirection, projectdistance, numshadowmark, shadowmarklist, ent->mins, ent->maxs);
1057         }
1058         if (ent->model->brush.submodel)
1059                 GL_PolygonOffset(r_refdef.shadowpolygonfactor, r_refdef.shadowpolygonoffset);
1060 }
1061
1062 #define BATCHSIZE 1024
1063
1064 static void R_Q1BSP_DrawLight_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
1065 {
1066         int i, j, endsurface;
1067         texture_t *t;
1068         msurface_t *surface;
1069         // note: in practice this never actually receives batches), oh well
1070         R_Shadow_RenderMode_Begin();
1071         R_Shadow_RenderMode_ActiveLight(rtlight);
1072         R_Shadow_RenderMode_Lighting(false, true);
1073         R_Shadow_SetupEntityLight(ent);
1074         for (i = 0;i < numsurfaces;i = j)
1075         {
1076                 j = i + 1;
1077                 surface = rsurface.modelsurfaces + surfacelist[i];
1078                 t = surface->texture;
1079                 rsurface.texture = R_GetCurrentTexture(t);
1080                 endsurface = min(j + BATCHSIZE, numsurfaces);
1081                 for (j = i;j < endsurface;j++)
1082                 {
1083                         surface = rsurface.modelsurfaces + surfacelist[j];
1084                         if (t != surface->texture)
1085                                 break;
1086                         RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1087                         R_Shadow_RenderLighting(surface->num_firstvertex, surface->num_vertices, surface->num_firsttriangle, surface->num_triangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1088                 }
1089         }
1090         R_Shadow_RenderMode_End();
1091 }
1092
1093 #define RSURF_MAX_BATCHSURFACES 8192
1094
1095 void R_Q1BSP_DrawLight(entity_render_t *ent, int numsurfaces, const int *surfacelist, const unsigned char *trispvs)
1096 {
1097         dp_model_t *model = ent->model;
1098         msurface_t *surface;
1099         int i, k, kend, l, m, mend, endsurface, batchnumsurfaces, batchnumtriangles, batchfirstvertex, batchlastvertex, batchfirsttriangle;
1100         qboolean usebufferobject, culltriangles;
1101         const int *element3i;
1102         msurface_t *batchsurfacelist[RSURF_MAX_BATCHSURFACES];
1103         int batchelements[BATCHSIZE*3];
1104         texture_t *tex;
1105         CHECKGLERROR
1106         culltriangles = r_shadow_culltriangles.integer && !(ent->flags & RENDER_NOSELFSHADOW);
1107         element3i = rsurface.modelelement3i;
1108         // this is a double loop because non-visible surface skipping has to be
1109         // fast, and even if this is not the world model (and hence no visibility
1110         // checking) the input surface list and batch buffer are different formats
1111         // so some processing is necessary.  (luckily models have few surfaces)
1112         for (i = 0;i < numsurfaces;)
1113         {
1114                 batchnumsurfaces = 0;
1115                 endsurface = min(i + RSURF_MAX_BATCHSURFACES, numsurfaces);
1116                 if (ent == r_refdef.scene.worldentity)
1117                 {
1118                         for (;i < endsurface;i++)
1119                                 if (r_refdef.viewcache.world_surfacevisible[surfacelist[i]])
1120                                         batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1121                 }
1122                 else
1123                 {
1124                         for (;i < endsurface;i++)
1125                                 batchsurfacelist[batchnumsurfaces++] = model->data_surfaces + surfacelist[i];
1126                 }
1127                 if (!batchnumsurfaces)
1128                         continue;
1129                 for (k = 0;k < batchnumsurfaces;k = kend)
1130                 {
1131                         surface = batchsurfacelist[k];
1132                         tex = surface->texture;
1133                         rsurface.texture = R_GetCurrentTexture(tex);
1134                         // gather surfaces into a batch range
1135                         for (kend = k;kend < batchnumsurfaces && tex == batchsurfacelist[kend]->texture;kend++)
1136                                 ;
1137                         // now figure out what to do with this particular range of surfaces
1138                         if (!(rsurface.texture->currentmaterialflags & MATERIALFLAG_WALL))
1139                                 continue;
1140                         if (r_waterstate.renderingscene && (rsurface.texture->currentmaterialflags & (MATERIALFLAG_WATERSHADER | MATERIALFLAG_REFRACTION | MATERIALFLAG_REFLECTION)))
1141                                 continue;
1142                         if (rsurface.texture->currentmaterialflags & MATERIALFLAGMASK_DEPTHSORTED)
1143                         {
1144                                 vec3_t tempcenter, center;
1145                                 for (l = k;l < kend;l++)
1146                                 {
1147                                         surface = batchsurfacelist[l];
1148                                         tempcenter[0] = (surface->mins[0] + surface->maxs[0]) * 0.5f;
1149                                         tempcenter[1] = (surface->mins[1] + surface->maxs[1]) * 0.5f;
1150                                         tempcenter[2] = (surface->mins[2] + surface->maxs[2]) * 0.5f;
1151                                         Matrix4x4_Transform(&rsurface.matrix, tempcenter, center);
1152                                         R_MeshQueue_AddTransparent(rsurface.texture->currentmaterialflags & MATERIALFLAG_NODEPTHTEST ? r_refdef.view.origin : center, R_Q1BSP_DrawLight_TransparentCallback, ent, surface - rsurface.modelsurfaces, rsurface.rtlight);
1153                                 }
1154                                 continue;
1155                         }
1156                         batchnumtriangles = 0;
1157                         batchfirsttriangle = surface->num_firsttriangle;
1158                         m = 0; // hush warning
1159                         for (l = k;l < kend;l++)
1160                         {
1161                                 surface = batchsurfacelist[l];
1162                                 RSurf_PrepareVerticesForBatch(true, true, 1, &surface);
1163                                 for (m = surface->num_firsttriangle, mend = m + surface->num_triangles;m < mend;m++)
1164                                 {
1165                                         if (trispvs)
1166                                         {
1167                                                 if (!CHECKPVSBIT(trispvs, m))
1168                                                 {
1169                                                         usebufferobject = false;
1170                                                         continue;
1171                                                 }
1172                                         }
1173                                         else if (culltriangles)
1174                                         {
1175                                                 if (r_shadow_frontsidecasting.integer && !PointInfrontOfTriangle(rsurface.entitylightorigin, rsurface.vertex3f + element3i[m*3+0]*3, rsurface.vertex3f + element3i[m*3+1]*3, rsurface.vertex3f + element3i[m*3+2]*3))
1176                                                 {
1177                                                         usebufferobject = false;
1178                                                         continue;
1179                                                 }
1180                                         }
1181                                         if (batchnumtriangles >= BATCHSIZE)
1182                                         {
1183                                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1184                                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1185                                                 // use the element buffer if all triangles are consecutive
1186                                                 if (m == batchfirsttriangle + batchnumtriangles)
1187                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1188                                                 else
1189                                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1190                                                 usebufferobject = true;
1191                                                 batchnumtriangles = 0;
1192                                                 batchfirsttriangle = m;
1193                                         }
1194                                         batchelements[batchnumtriangles*3+0] = element3i[m*3+0];
1195                                         batchelements[batchnumtriangles*3+1] = element3i[m*3+1];
1196                                         batchelements[batchnumtriangles*3+2] = element3i[m*3+2];
1197                                         batchnumtriangles++;
1198                                 }
1199                         }
1200                         if (batchnumtriangles > 0)
1201                         {
1202                                 r_refdef.stats.lights_lighttriangles += batchnumtriangles;
1203                                 Mod_VertexRangeFromElements(batchnumtriangles*3, batchelements, &batchfirstvertex, &batchlastvertex);
1204                                 // use the element buffer if all triangles are consecutive
1205                                 if (m == batchfirsttriangle + batchnumtriangles)
1206                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, batchfirsttriangle, batchnumtriangles, ent->model->surfmesh.data_element3i, ent->model->surfmesh.data_element3s, ent->model->surfmesh.ebo3i, ent->model->surfmesh.ebo3s);
1207                                 else
1208                                         R_Shadow_RenderLighting(batchfirstvertex, batchlastvertex + 1 - batchfirstvertex, 0, batchnumtriangles, batchelements, NULL, 0, 0);
1209                         }
1210                 }
1211         }
1212 }
1213
1214 //Made by [515]
1215 void R_ReplaceWorldTexture (void)
1216 {
1217         dp_model_t              *m;
1218         texture_t       *t;
1219         int                     i;
1220         const char      *r, *newt;
1221         skinframe_t *skinframe;
1222         if (!r_refdef.scene.worldmodel)
1223         {
1224                 Con_Printf("There is no worldmodel\n");
1225                 return;
1226         }
1227         m = r_refdef.scene.worldmodel;
1228
1229         if(Cmd_Argc() < 2)
1230         {
1231                 Con_Print("r_replacemaptexture <texname> <newtexname> - replaces texture\n");
1232                 Con_Print("r_replacemaptexture <texname> - switch back to default texture\n");
1233                 return;
1234         }
1235         if(!cl.islocalgame || !cl.worldmodel)
1236         {
1237                 Con_Print("This command works only in singleplayer\n");
1238                 return;
1239         }
1240         r = Cmd_Argv(1);
1241         newt = Cmd_Argv(2);
1242         if(!newt[0])
1243                 newt = r;
1244         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1245         {
1246                 if(/*t->width && !strcasecmp(t->name, r)*/ matchpattern( t->name, r, true ) )
1247                 {
1248                         if ((skinframe = R_SkinFrame_LoadExternal(newt, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE | TEXF_PICMIP, true)))
1249                         {
1250 //                              t->skinframes[0] = skinframe;
1251                                 t->currentskinframe = skinframe;
1252                                 t->currentskinframe = skinframe;
1253                                 Con_Printf("%s replaced with %s\n", r, newt);
1254                         }
1255                         else
1256                         {
1257                                 Con_Printf("%s was not found\n", newt);
1258                                 return;
1259                         }
1260                 }
1261         }
1262 }
1263
1264 //Made by [515]
1265 void R_ListWorldTextures (void)
1266 {
1267         dp_model_t              *m;
1268         texture_t       *t;
1269         int                     i;
1270         if (!r_refdef.scene.worldmodel)
1271         {
1272                 Con_Printf("There is no worldmodel\n");
1273                 return;
1274         }
1275         m = r_refdef.scene.worldmodel;
1276
1277         Con_Print("Worldmodel textures :\n");
1278         for(i=0,t=m->data_textures;i<m->num_textures;i++,t++)
1279                 if (t->numskinframes)
1280                         Con_Printf("%s\n", t->name);
1281 }
1282
1283 #if 0
1284 static void gl_surf_start(void)
1285 {
1286 }
1287
1288 static void gl_surf_shutdown(void)
1289 {
1290 }
1291
1292 static void gl_surf_newmap(void)
1293 {
1294 }
1295 #endif
1296
1297 void GL_Surf_Init(void)
1298 {
1299
1300         Cvar_RegisterVariable(&r_ambient);
1301         Cvar_RegisterVariable(&r_lockpvs);
1302         Cvar_RegisterVariable(&r_lockvisibility);
1303         Cvar_RegisterVariable(&r_useportalculling);
1304         Cvar_RegisterVariable(&r_q3bsp_renderskydepth);
1305
1306         Cmd_AddCommand ("r_replacemaptexture", R_ReplaceWorldTexture, "override a map texture for testing purposes");
1307         Cmd_AddCommand ("r_listmaptextures", R_ListWorldTextures, "list all textures used by the current map");
1308
1309         //R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown, gl_surf_newmap);
1310 }
1311