r_shadow.c

   1
   2 #include "quakedef.h"
   3 #include "r_shadow.h"
   4 #include "cl_collision.h"
   5
   6 extern void R_Shadow_EditLights_Init(void);
   7
   8 #define SHADOWSTAGE_NONE 0
   9 #define SHADOWSTAGE_STENCIL 1
  10 #define SHADOWSTAGE_LIGHT 2
  11 #define SHADOWSTAGE_ERASESTENCIL 3
  12
  13 int r_shadowstage = SHADOWSTAGE_NONE;
  14 int r_shadow_reloadlights = false;
  15
  16 int r_shadow_lightingmode = 0;
  17
  18 mempool_t *r_shadow_mempool;
  19
  20 int maxshadowelements;
  21 int *shadowelements;
  22 int maxtrianglefacinglight;
  23 qbyte *trianglefacinglight;
  24
  25 rtexturepool_t *r_shadow_texturepool;
  26 rtexture_t *r_shadow_normalscubetexture;
  27 rtexture_t *r_shadow_attenuation2dtexture;
  28 rtexture_t *r_shadow_blankbumptexture;
  29 rtexture_t *r_shadow_blankglosstexture;
  30 rtexture_t *r_shadow_blankwhitetexture;
  31
  32 cvar_t r_shadow_lightattenuationpower = {0, "r_shadow_lightattenuationpower", "2"};
  33 cvar_t r_shadow_lightattenuationscale = {0, "r_shadow_lightattenuationscale", "2"};
  34 cvar_t r_shadow_lightintensityscale = {0, "r_shadow_lightintensityscale", "1"};
  35 cvar_t r_shadow_realtime = {0, "r_shadow_realtime", "0"};
  36 cvar_t r_shadow_gloss = {0, "r_shadow_gloss", "1"};
  37 cvar_t r_shadow_debuglight = {0, "r_shadow_debuglight", "-1"};
  38 cvar_t r_shadow_scissor = {0, "r_shadow_scissor", "1"};
  39 cvar_t r_shadow_bumpscale_bumpmap = {0, "r_shadow_bumpscale_bumpmap", "4"};
  40 cvar_t r_shadow_bumpscale_basetexture = {0, "r_shadow_bumpscale_basetexture", "4"};
  41 cvar_t r_shadow_shadownudge = {0, "r_shadow_shadownudge", "1"};
  42
  43 void R_Shadow_ClearWorldLights(void);
  44 void R_Shadow_SaveWorldLights(void);
  45 void R_Shadow_LoadWorldLights(void);
  46 void R_Shadow_LoadLightsFile(void);
  47 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void);
  48
  49 void r_shadow_start(void)
  50 {
  51         // allocate vertex processing arrays
  52         r_shadow_mempool = Mem_AllocPool("R_Shadow");
  53         maxshadowelements = 0;
  54         shadowelements = NULL;
  55         maxtrianglefacinglight = 0;
  56         trianglefacinglight = NULL;
  57         r_shadow_normalscubetexture = NULL;
  58         r_shadow_attenuation2dtexture = NULL;
  59         r_shadow_blankbumptexture = NULL;
  60         r_shadow_blankglosstexture = NULL;
  61         r_shadow_blankwhitetexture = NULL;
  62         r_shadow_texturepool = NULL;
  63         R_Shadow_ClearWorldLights();
  64         r_shadow_reloadlights = true;
  65 }
  66
  67 void r_shadow_shutdown(void)
  68 {
  69         R_Shadow_ClearWorldLights();
  70         r_shadow_reloadlights = true;
  71         r_shadow_normalscubetexture = NULL;
  72         r_shadow_attenuation2dtexture = NULL;
  73         r_shadow_blankbumptexture = NULL;
  74         r_shadow_blankglosstexture = NULL;
  75         r_shadow_blankwhitetexture = NULL;
  76         R_FreeTexturePool(&r_shadow_texturepool);
  77         maxshadowelements = 0;
  78         shadowelements = NULL;
  79         maxtrianglefacinglight = 0;
  80         trianglefacinglight = NULL;
  81         Mem_FreePool(&r_shadow_mempool);
  82 }
  83
  84 void r_shadow_newmap(void)
  85 {
  86         R_Shadow_ClearWorldLights();
  87         r_shadow_reloadlights = true;
  88 }
  89
  90 void R_Shadow_Init(void)
  91 {
  92         Cvar_RegisterVariable(&r_shadow_lightattenuationpower);
  93         Cvar_RegisterVariable(&r_shadow_lightattenuationscale);
  94         Cvar_RegisterVariable(&r_shadow_lightintensityscale);
  95         Cvar_RegisterVariable(&r_shadow_realtime);
  96         Cvar_RegisterVariable(&r_shadow_gloss);
  97         Cvar_RegisterVariable(&r_shadow_debuglight);
  98         Cvar_RegisterVariable(&r_shadow_scissor);
  99         Cvar_RegisterVariable(&r_shadow_bumpscale_bumpmap);
 100         Cvar_RegisterVariable(&r_shadow_bumpscale_basetexture);
 101         Cvar_RegisterVariable(&r_shadow_shadownudge);
 102         R_Shadow_EditLights_Init();
 103         R_RegisterModule("R_Shadow", r_shadow_start, r_shadow_shutdown, r_shadow_newmap);
 104 }
 105
 106 void R_Shadow_ProjectVertices(float *verts, int numverts, const float *relativelightorigin, float projectdistance)
 107 {
 108         int i;
 109         float *in, *out, diff[4];
 110         in = verts;
 111         out = verts + numverts * 4;
 112         for (i = 0;i < numverts;i++, in += 4, out += 4)
 113         {
 114                 VectorSubtract(in, relativelightorigin, diff);
 115                 VectorNormalizeFast(diff);
 116                 VectorMA(in, projectdistance, diff, out);
 117                 VectorMA(in, r_shadow_shadownudge.value, diff, in);
 118         }
 119 }
 120
 121 void R_Shadow_MakeTriangleShadowFlags(const int *elements, const float *vertex, int numtris, qbyte *trianglefacinglight, const float *relativelightorigin, float lightradius)
 122 {
 123         int i;
 124         const float *v0, *v1, *v2;
 125         for (i = 0;i < numtris;i++, elements += 3)
 126         {
 127                 // calculate triangle facing flag
 128                 v0 = vertex + elements[0] * 4;
 129                 v1 = vertex + elements[1] * 4;
 130                 v2 = vertex + elements[2] * 4;
 131                 // we do not need to normalize the surface normal because both sides
 132                 // of the comparison use it, therefore they are both multiplied the
 133                 // same amount...  furthermore the subtract can be done on the
 134                 // vectors, saving a little bit of math in the dotproducts
 135 #if 1
 136                 // fast version
 137                 // subtracts v1 from v0 and v2, combined into a crossproduct,
 138                 // combined with a dotproduct of the light location relative to the
 139                 // first point of the triangle (any point works, since the triangle
 140                 // is obviously flat), and finally a comparison to determine if the
 141                 // light is infront of the triangle (the goal of this statement)
 142                 trianglefacinglight[i] =
 143                    (relativelightorigin[0] - v0[0]) * ((v0[1] - v1[1]) * (v2[2] - v1[2]) - (v0[2] - v1[2]) * (v2[1] - v1[1]))
 144                  + (relativelightorigin[1] - v0[1]) * ((v0[2] - v1[2]) * (v2[0] - v1[0]) - (v0[0] - v1[0]) * (v2[2] - v1[2]))
 145                  + (relativelightorigin[2] - v0[2]) * ((v0[0] - v1[0]) * (v2[1] - v1[1]) - (v0[1] - v1[1]) * (v2[0] - v1[0])) > 0;
 146 #else
 147                 // readable version
 148                 {
 149                 float dir0[3], dir1[3], temp[3];
 150
 151                 // calculate two mostly perpendicular edge directions
 152                 VectorSubtract(v0, v1, dir0);
 153                 VectorSubtract(v2, v1, dir1);
 154
 155                 // we have two edge directions, we can calculate a third vector from
 156                 // them, which is the direction of the surface normal (it's magnitude
 157                 // is not 1 however)
 158                 CrossProduct(dir0, dir1, temp);
 159
 160                 // this is entirely unnecessary, but kept for clarity
 161                 //VectorNormalize(temp);
 162
 163                 // compare distance of light along normal, with distance of any point
 164                 // of the triangle along the same normal (the triangle is planar,
 165                 // I.E. flat, so all points give the same answer)
 166                 // the normal is not normalized because it is used on both sides of
 167                 // the comparison, so it's magnitude does not matter
 168                 trianglefacinglight[i] = DotProduct(relativelightorigin, temp) >= DotProduct(v0, temp);
 169                 }
 170 #endif
 171         }
 172 }
 173
 174 int R_Shadow_BuildShadowVolumeTriangles(const int *elements, const int *neighbors, int numtris, int numverts, const qbyte *trianglefacinglight, int *out)
 175 {
 176         int i, tris;
 177         // check each frontface for bordering backfaces,
 178         // and cast shadow polygons from those edges,
 179         // also create front and back caps for shadow volume
 180         tris = 0;
 181         for (i = 0;i < numtris;i++, elements += 3, neighbors += 3)
 182         {
 183                 if (trianglefacinglight[i])
 184                 {
 185                         // triangle is frontface and therefore casts shadow,
 186                         // output front and back caps for shadow volume
 187                         // front cap
 188                         out[0] = elements[0];
 189                         out[1] = elements[1];
 190                         out[2] = elements[2];
 191                         // rear cap (with flipped winding order)
 192                         out[3] = elements[0] + numverts;
 193                         out[4] = elements[2] + numverts;
 194                         out[5] = elements[1] + numverts;
 195                         out += 6;
 196                         tris += 2;
 197                         // check the edges
 198                         if (neighbors[0] < 0 || !trianglefacinglight[neighbors[0]])
 199                         {
 200                                 out[0] = elements[1];
 201                                 out[1] = elements[0];
 202                                 out[2] = elements[0] + numverts;
 203                                 out[3] = elements[1];
 204                                 out[4] = elements[0] + numverts;
 205                                 out[5] = elements[1] + numverts;
 206                                 out += 6;
 207                                 tris += 2;
 208                         }
 209                         if (neighbors[1] < 0 || !trianglefacinglight[neighbors[1]])
 210                         {
 211                                 out[0] = elements[2];
 212                                 out[1] = elements[1];
 213                                 out[2] = elements[1] + numverts;
 214                                 out[3] = elements[2];
 215                                 out[4] = elements[1] + numverts;
 216                                 out[5] = elements[2] + numverts;
 217                                 out += 6;
 218                                 tris += 2;
 219                         }
 220                         if (neighbors[2] < 0 || !trianglefacinglight[neighbors[2]])
 221                         {
 222                                 out[0] = elements[0];
 223                                 out[1] = elements[2];
 224                                 out[2] = elements[2] + numverts;
 225                                 out[3] = elements[0];
 226                                 out[4] = elements[2] + numverts;
 227                                 out[5] = elements[0] + numverts;
 228                                 out += 6;
 229                                 tris += 2;
 230                         }
 231                 }
 232         }
 233         return tris;
 234 }
 235
 236 void R_Shadow_ResizeTriangleFacingLight(int numtris)
 237 {
 238         // make sure trianglefacinglight is big enough for this volume
 239         if (maxtrianglefacinglight < numtris)
 240         {
 241                 maxtrianglefacinglight = numtris;
 242                 if (trianglefacinglight)
 243                         Mem_Free(trianglefacinglight);
 244                 trianglefacinglight = Mem_Alloc(r_shadow_mempool, maxtrianglefacinglight);
 245         }
 246 }
 247
 248 void R_Shadow_ResizeShadowElements(int numtris)
 249 {
 250         // make sure shadowelements is big enough for this volume
 251         if (maxshadowelements < numtris * 24)
 252         {
 253                 maxshadowelements = numtris * 24;
 254                 if (shadowelements)
 255                         Mem_Free(shadowelements);
 256                 shadowelements = Mem_Alloc(r_shadow_mempool, maxshadowelements * sizeof(int));
 257         }
 258 }
 259
 260 void R_Shadow_Volume(int numverts, int numtris, int *elements, int *neighbors, vec3_t relativelightorigin, float lightradius, float projectdistance)
 261 {
 262         int tris;
 263         if (projectdistance < 0.1)
 264         {
 265                 Con_Printf("R_Shadow_Volume: projectdistance %f\n");
 266                 return;
 267         }
 268 // terminology:
 269 //
 270 // frontface:
 271 // a triangle facing the light source
 272 //
 273 // backface:
 274 // a triangle not facing the light source
 275 //
 276 // shadow volume:
 277 // an extrusion of the frontfaces, beginning at the original geometry and
 278 // ending further from the light source than the original geometry
 279 // (presumably at least as far as the light's radius, if the light has a
 280 // radius at all), capped at both front and back to avoid any problems
 281 //
 282 // description:
 283 // draws the shadow volumes of the model.
 284 // requirements:
 285 // vertex locations must already be in varray_vertex before use.
 286 // varray_vertex must have capacity for numverts * 2.
 287
 288         // make sure trianglefacinglight is big enough for this volume
 289         if (maxtrianglefacinglight < numtris)
 290                 R_Shadow_ResizeTriangleFacingLight(numtris);
 291
 292         // make sure shadowelements is big enough for this volume
 293         if (maxshadowelements < numtris * 24)
 294                 R_Shadow_ResizeShadowElements(numtris);
 295
 296         // check which triangles are facing the light
 297         R_Shadow_MakeTriangleShadowFlags(elements, varray_vertex, numtris, trianglefacinglight, relativelightorigin, lightradius);
 298
 299         // generate projected vertices
 300         // by clever use of elements we'll construct the whole shadow from
 301         // the unprojected vertices and these projected vertices
 302         R_Shadow_ProjectVertices(varray_vertex, numverts, relativelightorigin, projectdistance);
 303
 304         // output triangle elements
 305         tris = R_Shadow_BuildShadowVolumeTriangles(elements, neighbors, numtris, numverts, trianglefacinglight, shadowelements);
 306         R_Shadow_RenderVolume(numverts * 2, tris, shadowelements);
 307 }
 308
 309 void R_Shadow_RenderVolume(int numverts, int numtris, int *elements)
 310 {
 311         if (!numverts || !numtris)
 312                 return;
 313         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 314         {
 315                 // increment stencil if backface is behind depthbuffer
 316                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 317                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 318                 R_Mesh_Draw(numverts, numtris, elements);
 319                 // decrement stencil if frontface is behind depthbuffer
 320                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 321                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 322         }
 323         R_Mesh_Draw(numverts, numtris, elements);
 324 }
 325
 326 void R_Shadow_RenderShadowMeshVolume(shadowmesh_t *firstmesh)
 327 {
 328         shadowmesh_t *mesh;
 329         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 330         {
 331                 // increment stencil if backface is behind depthbuffer
 332                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 333                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 334                 for (mesh = firstmesh;mesh;mesh = mesh->next)
 335                 {
 336                         R_Mesh_ResizeCheck(mesh->numverts);
 337                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 338                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 339                 }
 340                 // decrement stencil if frontface is behind depthbuffer
 341                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 342                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 343         }
 344         for (mesh = firstmesh;mesh;mesh = mesh->next)
 345         {
 346                 R_Mesh_ResizeCheck(mesh->numverts);
 347                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 348                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 349         }
 350 }
 351
 352 float r_shadow_attenpower, r_shadow_attenscale;
 353 static void R_Shadow_MakeTextures(void)
 354 {
 355         int x, y, d, side;
 356         float v[3], s, t, intensity;
 357         qbyte *data;
 358         R_FreeTexturePool(&r_shadow_texturepool);
 359         r_shadow_texturepool = R_AllocTexturePool();
 360         r_shadow_attenpower = r_shadow_lightattenuationpower.value;
 361         r_shadow_attenscale = r_shadow_lightattenuationscale.value;
 362         data = Mem_Alloc(tempmempool, 6*128*128*4);
 363         data[0] = 128;
 364         data[1] = 128;
 365         data[2] = 255;
 366         data[3] = 255;
 367         r_shadow_blankbumptexture = R_LoadTexture2D(r_shadow_texturepool, "blankbump", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 368         data[0] = 64;
 369         data[1] = 64;
 370         data[2] = 64;
 371         data[3] = 255;
 372         r_shadow_blankglosstexture = R_LoadTexture2D(r_shadow_texturepool, "blankgloss", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 373         data[0] = 255;
 374         data[1] = 255;
 375         data[2] = 255;
 376         data[3] = 255;
 377         r_shadow_blankwhitetexture = R_LoadTexture2D(r_shadow_texturepool, "blankwhite", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 378         for (side = 0;side < 6;side++)
 379         {
 380                 for (y = 0;y < 128;y++)
 381                 {
 382                         for (x = 0;x < 128;x++)
 383                         {
 384                                 s = (x + 0.5f) * (2.0f / 128.0f) - 1.0f;
 385                                 t = (y + 0.5f) * (2.0f / 128.0f) - 1.0f;
 386                                 switch(side)
 387                                 {
 388                                 case 0:
 389                                         v[0] = 1;
 390                                         v[1] = -t;
 391                                         v[2] = -s;
 392                                         break;
 393                                 case 1:
 394                                         v[0] = -1;
 395                                         v[1] = -t;
 396                                         v[2] = s;
 397                                         break;
 398                                 case 2:
 399                                         v[0] = s;
 400                                         v[1] = 1;
 401                                         v[2] = t;
 402                                         break;
 403                                 case 3:
 404                                         v[0] = s;
 405                                         v[1] = -1;
 406                                         v[2] = -t;
 407                                         break;
 408                                 case 4:
 409                                         v[0] = s;
 410                                         v[1] = -t;
 411                                         v[2] = 1;
 412                                         break;
 413                                 case 5:
 414                                         v[0] = -s;
 415                                         v[1] = -t;
 416                                         v[2] = -1;
 417                                         break;
 418                                 }
 419                                 intensity = 127.0f / sqrt(DotProduct(v, v));
 420                                 data[((side*128+y)*128+x)*4+0] = 128.0f + intensity * v[0];
 421                                 data[((side*128+y)*128+x)*4+1] = 128.0f + intensity * v[1];
 422                                 data[((side*128+y)*128+x)*4+2] = 128.0f + intensity * v[2];
 423                                 data[((side*128+y)*128+x)*4+3] = 255;
 424                         }
 425                 }
 426         }
 427         r_shadow_normalscubetexture = R_LoadTextureCubeMap(r_shadow_texturepool, "normalscube", 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP, NULL);
 428         for (y = 0;y < 128;y++)
 429         {
 430                 for (x = 0;x < 128;x++)
 431                 {
 432                         v[0] = (x + 0.5f) * (2.0f / 128.0f) - 1.0f;
 433                         v[1] = (y + 0.5f) * (2.0f / 128.0f) - 1.0f;
 434                         v[2] = 0;
 435                         intensity = 1.0f - sqrt(DotProduct(v, v));
 436                         if (intensity > 0)
 437                                 intensity = pow(intensity, r_shadow_attenpower);
 438                         intensity = bound(0, intensity * r_shadow_attenscale * 256.0f, 255.0f);
 439                         d = bound(0, intensity, 255);
 440                         data[((0*128+y)*128+x)*4+0] = d;
 441                         data[((0*128+y)*128+x)*4+1] = d;
 442                         data[((0*128+y)*128+x)*4+2] = d;
 443                         data[((0*128+y)*128+x)*4+3] = d;
 444                 }
 445         }
 446         r_shadow_attenuation2dtexture = R_LoadTexture2D(r_shadow_texturepool, "attenuation2d", 128, 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP | TEXF_ALPHA | TEXF_MIPMAP, NULL);
 447         Mem_Free(data);
 448 }
 449
 450 void R_Shadow_Stage_Begin(void)
 451 {
 452         rmeshstate_t m;
 453
 454         //cl.worldmodel->numlights = min(cl.worldmodel->numlights, 1);
 455         if (!r_shadow_attenuation2dtexture
 456          || r_shadow_lightattenuationpower.value != r_shadow_attenpower
 457          || r_shadow_lightattenuationscale.value != r_shadow_attenscale)
 458                 R_Shadow_MakeTextures();
 459         if (r_shadow_reloadlights && cl.worldmodel)
 460         {
 461                 R_Shadow_ClearWorldLights();
 462                 r_shadow_reloadlights = false;
 463                 R_Shadow_LoadWorldLights();
 464                 if (r_shadow_worldlightchain == NULL)
 465                 {
 466                         R_Shadow_LoadLightsFile();
 467                         if (r_shadow_worldlightchain == NULL)
 468                                 R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
 469                 }
 470         }
 471
 472         memset(&m, 0, sizeof(m));
 473         m.blendfunc1 = GL_ONE;
 474         m.blendfunc2 = GL_ZERO;
 475         R_Mesh_State(&m);
 476         GL_Color(0, 0, 0, 1);
 477         r_shadowstage = SHADOWSTAGE_NONE;
 478 }
 479
 480 void R_Shadow_Stage_ShadowVolumes(void)
 481 {
 482         rmeshstate_t m;
 483         memset(&m, 0, sizeof(m));
 484         R_Mesh_TextureState(&m);
 485         GL_Color(1, 1, 1, 1);
 486         qglColorMask(0, 0, 0, 0);
 487         qglDisable(GL_BLEND);
 488         qglDepthMask(0);
 489         qglDepthFunc(GL_LESS);
 490         qglEnable(GL_STENCIL_TEST);
 491         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 492         qglStencilFunc(GL_ALWAYS, 128, 0xFF);
 493         qglEnable(GL_CULL_FACE);
 494         qglEnable(GL_DEPTH_TEST);
 495         r_shadowstage = SHADOWSTAGE_STENCIL;
 496         qglClear(GL_STENCIL_BUFFER_BIT);
 497 }
 498
 499 void R_Shadow_Stage_Light(void)
 500 {
 501         rmeshstate_t m;
 502         memset(&m, 0, sizeof(m));
 503         R_Mesh_TextureState(&m);
 504         qglActiveTexture(GL_TEXTURE0_ARB);
 505
 506         qglEnable(GL_BLEND);
 507         qglBlendFunc(GL_ONE, GL_ONE);
 508         GL_Color(1, 1, 1, 1);
 509         qglColorMask(1, 1, 1, 1);
 510         qglDepthMask(0);
 511         qglDepthFunc(GL_EQUAL);
 512         qglEnable(GL_STENCIL_TEST);
 513         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 514         // only draw light where this geometry was already rendered AND the
 515         // stencil is 128 (values other than this mean shadow)
 516         qglStencilFunc(GL_EQUAL, 128, 0xFF);
 517         qglEnable(GL_CULL_FACE);
 518         qglEnable(GL_DEPTH_TEST);
 519         r_shadowstage = SHADOWSTAGE_LIGHT;
 520 }
 521
 522 void R_Shadow_Stage_End(void)
 523 {
 524         rmeshstate_t m;
 525         // attempt to restore state to what Mesh_State thinks it is
 526         qglDisable(GL_BLEND);
 527         qglBlendFunc(GL_ONE, GL_ZERO);
 528         qglDepthMask(1);
 529         // now restore the rest of the state to normal
 530         GL_Color(1, 1, 1, 1);
 531         qglColorMask(1, 1, 1, 1);
 532         qglDisable(GL_SCISSOR_TEST);
 533         qglDepthFunc(GL_LEQUAL);
 534         qglDisable(GL_STENCIL_TEST);
 535         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 536         qglStencilFunc(GL_ALWAYS, 128, 0xFF);
 537         qglEnable(GL_CULL_FACE);
 538         qglEnable(GL_DEPTH_TEST);
 539         // force mesh state to reset by using various combinations of features
 540         memset(&m, 0, sizeof(m));
 541         m.blendfunc1 = GL_SRC_ALPHA;
 542         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 543         R_Mesh_State(&m);
 544         m.blendfunc1 = GL_ONE;
 545         m.blendfunc2 = GL_ZERO;
 546         R_Mesh_State(&m);
 547         r_shadowstage = SHADOWSTAGE_NONE;
 548 }
 549
 550 int R_Shadow_ScissorForBBoxAndSphere(const float *mins, const float *maxs, const float *origin, float radius)
 551 {
 552         int i, ix1, iy1, ix2, iy2;
 553         float x1, y1, x2, y2, x, y;
 554         vec3_t smins, smaxs;
 555         vec4_t v, v2;
 556         if (!r_shadow_scissor.integer)
 557                 return false;
 558         // if view is inside the box, just say yes it's visible
 559         if (r_origin[0] >= mins[0] && r_origin[0] <= maxs[0]
 560          && r_origin[1] >= mins[1] && r_origin[1] <= maxs[1]
 561          && r_origin[2] >= mins[2] && r_origin[2] <= maxs[2])
 562         {
 563                 qglDisable(GL_SCISSOR_TEST);
 564                 return false;
 565         }
 566         VectorSubtract(r_origin, origin, v);
 567         if (DotProduct(v, v) < radius * radius)
 568         {
 569                 qglDisable(GL_SCISSOR_TEST);
 570                 return false;
 571         }
 572         // create viewspace bbox
 573         for (i = 0;i < 8;i++)
 574         {
 575                 v[0] = ((i & 1) ? mins[0] : maxs[0]) - r_origin[0];
 576                 v[1] = ((i & 2) ? mins[1] : maxs[1]) - r_origin[1];
 577                 v[2] = ((i & 4) ? mins[2] : maxs[2]) - r_origin[2];
 578                 v2[0] = DotProduct(v, vright);
 579                 v2[1] = DotProduct(v, vup);
 580                 v2[2] = DotProduct(v, vpn);
 581                 if (i)
 582                 {
 583                         if (smins[0] > v2[0]) smins[0] = v2[0];
 584                         if (smaxs[0] < v2[0]) smaxs[0] = v2[0];
 585                         if (smins[1] > v2[1]) smins[1] = v2[1];
 586                         if (smaxs[1] < v2[1]) smaxs[1] = v2[1];
 587                         if (smins[2] > v2[2]) smins[2] = v2[2];
 588                         if (smaxs[2] < v2[2]) smaxs[2] = v2[2];
 589                 }
 590                 else
 591                 {
 592                         smins[0] = smaxs[0] = v2[0];
 593                         smins[1] = smaxs[1] = v2[1];
 594                         smins[2] = smaxs[2] = v2[2];
 595                 }
 596         }
 597         // now we have a bbox in viewspace
 598         // clip it to the viewspace version of the sphere
 599         v[0] = origin[0] - r_origin[0];
 600         v[1] = origin[1] - r_origin[1];
 601         v[2] = origin[2] - r_origin[2];
 602         v2[0] = DotProduct(v, vright);
 603         v2[1] = DotProduct(v, vup);
 604         v2[2] = DotProduct(v, vpn);
 605         if (smins[0] < v2[0] - radius) smins[0] = v2[0] - radius;
 606         if (smaxs[0] < v2[0] - radius) smaxs[0] = v2[0] + radius;
 607         if (smins[1] < v2[1] - radius) smins[1] = v2[1] - radius;
 608         if (smaxs[1] < v2[1] - radius) smaxs[1] = v2[1] + radius;
 609         if (smins[2] < v2[2] - radius) smins[2] = v2[2] - radius;
 610         if (smaxs[2] < v2[2] - radius) smaxs[2] = v2[2] + radius;
 611         // clip it to the view plane
 612         if (smins[2] < 1)
 613                 smins[2] = 1;
 614         // return true if that culled the box
 615         if (smins[2] >= smaxs[2])
 616                 return true;
 617         // ok some of it is infront of the view, transform each corner back to
 618         // worldspace and then to screenspace and make screen rect
 619         // initialize these variables just to avoid compiler warnings
 620         x1 = y1 = x2 = y2 = 0;
 621         for (i = 0;i < 8;i++)
 622         {
 623                 v2[0] = (i & 1) ? smins[0] : smaxs[0];
 624                 v2[1] = (i & 2) ? smins[1] : smaxs[1];
 625                 v2[2] = (i & 4) ? smins[2] : smaxs[2];
 626                 v[0] = v2[0] * vright[0] + v2[1] * vup[0] + v2[2] * vpn[0] + r_origin[0];
 627                 v[1] = v2[0] * vright[1] + v2[1] * vup[1] + v2[2] * vpn[1] + r_origin[1];
 628                 v[2] = v2[0] * vright[2] + v2[1] * vup[2] + v2[2] * vpn[2] + r_origin[2];
 629                 v[3] = 1.0f;
 630                 GL_TransformToScreen(v, v2);
 631                 //Con_Printf("%.3f %.3f %.3f %.3f transformed to %.3f %.3f %.3f %.3f\n", v[0], v[1], v[2], v[3], v2[0], v2[1], v2[2], v2[3]);
 632                 x = v2[0];
 633                 y = v2[1];
 634                 if (i)
 635                 {
 636                         if (x1 > x) x1 = x;
 637                         if (x2 < x) x2 = x;
 638                         if (y1 > y) y1 = y;
 639                         if (y2 < y) y2 = y;
 640                 }
 641                 else
 642                 {
 643                         x1 = x2 = x;
 644                         y1 = y2 = y;
 645                 }
 646         }
 647         /*
 648         // this code doesn't handle boxes with any points behind view properly
 649         x1 = 1000;x2 = -1000;
 650         y1 = 1000;y2 = -1000;
 651         for (i = 0;i < 8;i++)
 652         {
 653                 v[0] = (i & 1) ? mins[0] : maxs[0];
 654                 v[1] = (i & 2) ? mins[1] : maxs[1];
 655                 v[2] = (i & 4) ? mins[2] : maxs[2];
 656                 v[3] = 1.0f;
 657                 GL_TransformToScreen(v, v2);
 658                 //Con_Printf("%.3f %.3f %.3f %.3f transformed to %.3f %.3f %.3f %.3f\n", v[0], v[1], v[2], v[3], v2[0], v2[1], v2[2], v2[3]);
 659                 if (v2[2] > 0)
 660                 {
 661                         x = v2[0];
 662                         y = v2[1];
 663
 664                         if (x1 > x) x1 = x;
 665                         if (x2 < x) x2 = x;
 666                         if (y1 > y) y1 = y;
 667                         if (y2 < y) y2 = y;
 668                 }
 669         }
 670         */
 671         ix1 = x1 - 1.0f;
 672         iy1 = y1 - 1.0f;
 673         ix2 = x2 + 1.0f;
 674         iy2 = y2 + 1.0f;
 675         //Con_Printf("%f %f %f %f\n", x1, y1, x2, y2);
 676         if (ix1 < r_refdef.x) ix1 = r_refdef.x;
 677         if (iy1 < r_refdef.y) iy1 = r_refdef.y;
 678         if (ix2 > r_refdef.x + r_refdef.width) ix2 = r_refdef.x + r_refdef.width;
 679         if (iy2 > r_refdef.y + r_refdef.height) iy2 = r_refdef.y + r_refdef.height;
 680         if (ix2 <= ix1 || iy2 <= iy1)
 681                 return true;
 682         // set up the scissor rectangle
 683         qglScissor(ix1, iy1, ix2 - ix1, iy2 - iy1);
 684         qglEnable(GL_SCISSOR_TEST);
 685         return false;
 686 }
 687
 688 void R_Shadow_GenTexCoords_Attenuation2D1D(float *out2d, float *out1d, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, float lightradius)
 689 {
 690         int i;
 691         float lightvec[3], iradius;
 692         iradius = 0.5f / lightradius;
 693         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out2d += 4, out1d += 4)
 694         {
 695                 VectorSubtract(vertex, relativelightorigin, lightvec);
 696                 out2d[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 697                 out2d[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 698                 out2d[2] = 0;
 699                 out1d[0] = 0.5f + DotProduct(normals, lightvec) * iradius;
 700                 out1d[1] = 0.5f;
 701                 out1d[2] = 0;
 702         }
 703 }
 704
 705 void R_Shadow_GenTexCoords_Diffuse_Attenuation3D(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, float lightradius)
 706 {
 707         int i;
 708         float lightvec[3], iradius;
 709         iradius = 0.5f / lightradius;
 710         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 711         {
 712                 VectorSubtract(vertex, relativelightorigin, lightvec);
 713                 out[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 714                 out[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 715                 out[2] = 0.5f + DotProduct(normals, lightvec) * iradius;
 716         }
 717 }
 718
 719 void R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin)
 720 {
 721         int i;
 722         float lightdir[3];
 723         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 724         {
 725                 VectorSubtract(vertex, relativelightorigin, lightdir);
 726                 // the cubemap normalizes this for us
 727                 out[0] = DotProduct(svectors, lightdir);
 728                 out[1] = DotProduct(tvectors, lightdir);
 729                 out[2] = DotProduct(normals, lightdir);
 730         }
 731 }
 732
 733 void R_Shadow_GenTexCoords_Specular_Attenuation3D(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, const vec3_t relativeeyeorigin, float lightradius)
 734 {
 735         int i;
 736         float lightdir[3], eyedir[3], halfdir[3], lightdirlen, iradius;
 737         iradius = 0.5f / lightradius;
 738         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 739         {
 740                 VectorSubtract(vertex, relativelightorigin, lightdir);
 741                 // this is used later to make the attenuation correct
 742                 lightdirlen = sqrt(DotProduct(lightdir, lightdir)) * iradius;
 743                 VectorNormalizeFast(lightdir);
 744                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 745                 VectorNormalizeFast(eyedir);
 746                 VectorAdd(lightdir, eyedir, halfdir);
 747                 VectorNormalizeFast(halfdir);
 748                 out[0] = 0.5f + DotProduct(svectors, halfdir) * lightdirlen;
 749                 out[1] = 0.5f + DotProduct(tvectors, halfdir) * lightdirlen;
 750                 out[2] = 0.5f + DotProduct(normals, halfdir) * lightdirlen;
 751         }
 752 }
 753
 754 void R_Shadow_GenTexCoords_Specular_NormalCubeMap(float *out, int numverts, const float *vertex, const float *svectors, const float *tvectors, const float *normals, const vec3_t relativelightorigin, const vec3_t relativeeyeorigin)
 755 {
 756         int i;
 757         float lightdir[3], eyedir[3], halfdir[3];
 758         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 759         {
 760                 VectorSubtract(vertex, relativelightorigin, lightdir);
 761                 VectorNormalizeFast(lightdir);
 762                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 763                 VectorNormalizeFast(eyedir);
 764                 VectorAdd(lightdir, eyedir, halfdir);
 765                 // the cubemap normalizes this for us
 766                 out[0] = DotProduct(svectors, halfdir);
 767                 out[1] = DotProduct(tvectors, halfdir);
 768                 out[2] = DotProduct(normals, halfdir);
 769         }
 770 }
 771
 772 void R_Shadow_GenTexCoords_LightCubeMap(float *out, int numverts, const float *vertex, const vec3_t relativelightorigin)
 773 {
 774         int i;
 775         // FIXME: this needs to be written
 776         // this code assumes the vertices are in worldspace (a false assumption)
 777         for (i = 0;i < numverts;i++, vertex += 4, out += 4)
 778                 VectorSubtract(vertex, relativelightorigin, out);
 779 }
 780
 781 void R_Shadow_DiffuseLighting(int numverts, int numtriangles, const int *elements, const float *svectors, const float *tvectors, const float *normals, const float *texcoords, const float *relativelightorigin, float lightradius, const float *lightcolor, rtexture_t *basetexture, rtexture_t *bumptexture, rtexture_t *lightcubemap)
 782 {
 783         int renders, mult;
 784         float scale, colorscale;
 785         rmeshstate_t m;
 786         memset(&m, 0, sizeof(m));
 787         if (!bumptexture)
 788                 bumptexture = r_shadow_blankbumptexture;
 789         // colorscale accounts for how much we multiply the brightness during combine
 790         // mult is how many times the final pass of the lighting will be
 791         // performed to get more brightness than otherwise possible
 792         // limit mult to 64 for sanity sake
 793         if (r_textureunits.integer >= 4)
 794         {
 795                 // 4 texture no3D combine path, two pass
 796                 m.tex[0] = R_GetTexture(bumptexture);
 797                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 798                 m.texcombinergb[0] = GL_REPLACE;
 799                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 800                 m.tex[2] = R_GetTexture(r_shadow_attenuation2dtexture);
 801                 m.tex[3] = R_GetTexture(r_shadow_attenuation2dtexture);
 802                 R_Mesh_TextureState(&m);
 803                 qglColorMask(0,0,0,1);
 804                 qglDisable(GL_BLEND);
 805                 GL_Color(1,1,1,1);
 806                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 807                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 808                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[2], varray_texcoord[3], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 809                 R_Mesh_Draw(numverts, numtriangles, elements);
 810
 811                 m.tex[0] = R_GetTexture(basetexture);
 812                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 813                 m.texcombinergb[0] = GL_MODULATE;
 814                 m.texcombinergb[1] = GL_MODULATE;
 815                 m.tex[2] = 0;
 816                 m.tex[3] = 0;
 817                 R_Mesh_TextureState(&m);
 818                 qglColorMask(1,1,1,1);
 819                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 820                 qglEnable(GL_BLEND);
 821                 if (lightcubemap)
 822                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 823
 824                 colorscale = r_colorscale * r_shadow_lightintensityscale.value;
 825                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 826                 colorscale *= scale;
 827                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 828                 for (renders = 0;renders < mult;renders++)
 829                         R_Mesh_Draw(numverts, numtriangles, elements);
 830         }
 831         else
 832         {
 833                 // 2 texture no3D combine path, three pass
 834                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
 835                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
 836                 R_Mesh_TextureState(&m);
 837                 qglColorMask(0,0,0,1);
 838                 qglDisable(GL_BLEND);
 839                 GL_Color(1,1,1,1);
 840                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 841                 R_Mesh_Draw(numverts, numtriangles, elements);
 842
 843                 m.tex[0] = R_GetTexture(bumptexture);
 844                 m.tex[1] = 0;
 845                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 846                 m.texcombinergb[0] = GL_REPLACE;
 847                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 848                 R_Mesh_TextureState(&m);
 849                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
 850                 qglEnable(GL_BLEND);
 851                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 852                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 853                 R_Mesh_Draw(numverts, numtriangles, elements);
 854
 855                 m.tex[0] = R_GetTexture(basetexture);
 856                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 857                 m.texcombinergb[0] = GL_MODULATE;
 858                 m.texcombinergb[1] = GL_MODULATE;
 859                 R_Mesh_TextureState(&m);
 860                 qglColorMask(1,1,1,1);
 861                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 862                 if (lightcubemap)
 863                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 864
 865                 colorscale = r_colorscale * r_shadow_lightintensityscale.value;
 866                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 867                 colorscale *= scale;
 868                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 869                 for (renders = 0;renders < mult;renders++)
 870                         R_Mesh_Draw(numverts, numtriangles, elements);
 871         }
 872 }
 873
 874 void R_Shadow_SpecularLighting(int numverts, int numtriangles, const int *elements, const float *svectors, const float *tvectors, const float *normals, const float *texcoords, const float *relativelightorigin, const float *relativeeyeorigin, float lightradius, const float *lightcolor, rtexture_t *glosstexture, rtexture_t *bumptexture, rtexture_t *lightcubemap)
 875 {
 876         int renders, mult;
 877         float scale, colorscale;
 878         rmeshstate_t m;
 879         memset(&m, 0, sizeof(m));
 880         if (!bumptexture)
 881                 bumptexture = r_shadow_blankbumptexture;
 882         if (!glosstexture)
 883                 glosstexture = r_shadow_blankglosstexture;
 884         if (r_shadow_gloss.integer >= 2 || (r_shadow_gloss.integer >= 1 && glosstexture != r_shadow_blankglosstexture))
 885         {
 886                 // 2 texture no3D combine path, five pass
 887                 memset(&m, 0, sizeof(m));
 888
 889                 m.tex[0] = R_GetTexture(bumptexture);
 890                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 891                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 892                 R_Mesh_TextureState(&m);
 893                 qglColorMask(0,0,0,1);
 894                 qglDisable(GL_BLEND);
 895                 GL_Color(1,1,1,1);
 896                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 897                 R_Shadow_GenTexCoords_Specular_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, relativeeyeorigin);
 898                 R_Mesh_Draw(numverts, numtriangles, elements);
 899
 900                 m.tex[0] = 0;
 901                 m.texcubemap[1] = 0;
 902                 m.texcombinergb[1] = GL_MODULATE;
 903                 R_Mesh_TextureState(&m);
 904                 // square alpha in framebuffer a few times to make it shiny
 905                 qglBlendFunc(GL_ZERO, GL_DST_ALPHA);
 906                 qglEnable(GL_BLEND);
 907                 // these comments are a test run through this math for intensity 0.5
 908                 // 0.5 * 0.5 = 0.25
 909                 R_Mesh_Draw(numverts, numtriangles, elements);
 910                 // 0.25 * 0.25 = 0.0625
 911                 R_Mesh_Draw(numverts, numtriangles, elements);
 912                 // 0.0625 * 0.0625 = 0.00390625
 913                 R_Mesh_Draw(numverts, numtriangles, elements);
 914
 915                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
 916                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
 917                 R_Mesh_TextureState(&m);
 918                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
 919                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 920                 R_Mesh_Draw(numverts, numtriangles, elements);
 921
 922                 m.tex[0] = R_GetTexture(glosstexture);
 923                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 924                 R_Mesh_TextureState(&m);
 925                 qglColorMask(1,1,1,1);
 926                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 927                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 928                 if (lightcubemap)
 929                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 930
 931                 colorscale = r_colorscale * r_shadow_lightintensityscale.value;
 932                 for (mult = 1, scale = ixtable[mult];mult < 64 && (lightcolor[0] * scale * colorscale > 1 || lightcolor[1] * scale * colorscale > 1 || lightcolor[2] * scale * colorscale > 1);mult++, scale = ixtable[mult]);
 933                 colorscale *= scale;
 934                 GL_Color(lightcolor[0] * colorscale, lightcolor[1] * colorscale, lightcolor[2] * colorscale, 1);
 935                 for (renders = 0;renders < mult;renders++)
 936                         R_Mesh_Draw(numverts, numtriangles, elements);
 937         }
 938 }
 939
 940 void R_Shadow_DrawWorldLightShadowVolume(matrix4x4_t *matrix, worldlight_t *light)
 941 {
 942         R_Mesh_Matrix(matrix);
 943         R_Shadow_RenderShadowMeshVolume(light->shadowvolume);
 944 }
 945
 946 cvar_t r_editlights = {0, "r_editlights", "0"};
 947 cvar_t r_editlights_cursordistance = {0, "r_editlights_distance", "1024"};
 948 cvar_t r_editlights_cursorpushback = {0, "r_editlights_pushback", "0"};
 949 cvar_t r_editlights_cursorpushoff = {0, "r_editlights_pushoff", "4"};
 950 cvar_t r_editlights_cursorgrid = {0, "r_editlights_grid", "4"};
 951 cvar_t r_editlights_quakelightsizescale = {CVAR_SAVE, "r_editlights_quakelightsizescale", "0.8"};
 952 worldlight_t *r_shadow_worldlightchain;
 953 worldlight_t *r_shadow_selectedlight;
 954 vec3_t r_editlights_cursorlocation;
 955
 956 static int castshadowcount = 1;
 957 void R_Shadow_NewWorldLight(vec3_t origin, float radius, vec3_t color, int style, const char *cubemapname)
 958 {
 959         int i, j, k, l, maxverts, *mark, tris;
 960         float *verts, *v, f, temp[3], radius2;
 961         //float projectdistance, *v0, *v1, temp2[3], temp3[3];
 962         worldlight_t *e;
 963         shadowmesh_t *mesh, *castmesh;
 964         mleaf_t *leaf;
 965         msurface_t *surf;
 966         qbyte *pvs;
 967         surfmesh_t *surfmesh;
 968
 969         if (radius < 15 || DotProduct(color, color) < 0.03)
 970         {
 971                 Con_Printf("R_Shadow_NewWorldLight: refusing to create a light too small/dim\n");
 972                 return;
 973         }
 974
 975         e = Mem_Alloc(r_shadow_mempool, sizeof(worldlight_t));
 976         VectorCopy(origin, e->origin);
 977         VectorCopy(color, e->light);
 978         e->lightradius = radius;
 979         VectorCopy(origin, e->mins);
 980         VectorCopy(origin, e->maxs);
 981         e->cullradius = 0;
 982         e->style = style;
 983         e->next = r_shadow_worldlightchain;
 984         r_shadow_worldlightchain = e;
 985         if (cubemapname)
 986         {
 987                 e->cubemapname = Mem_Alloc(r_shadow_mempool, strlen(cubemapname) + 1);
 988                 strcpy(e->cubemapname, cubemapname);
 989                 // FIXME: add cubemap loading (and don't load a cubemap twice)
 990         }
 991         if (cl.worldmodel)
 992         {
 993                 castshadowcount++;
 994                 leaf = Mod_PointInLeaf(origin, cl.worldmodel);
 995                 pvs = Mod_LeafPVS(leaf, cl.worldmodel);
 996                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
 997                 {
 998                         if (pvs[i >> 3] & (1 << (i & 7)))
 999                         {
1000                                 VectorCopy(origin, temp);
1001                                 if (temp[0] < leaf->mins[0]) temp[0] = leaf->mins[0];
1002                                 if (temp[0] > leaf->maxs[0]) temp[0] = leaf->maxs[0];
1003                                 if (temp[1] < leaf->mins[1]) temp[1] = leaf->mins[1];
1004                                 if (temp[1] > leaf->maxs[1]) temp[1] = leaf->maxs[1];
1005                                 if (temp[2] < leaf->mins[2]) temp[2] = leaf->mins[2];
1006                                 if (temp[2] > leaf->maxs[2]) temp[2] = leaf->maxs[2];
1007                                 VectorSubtract(temp, origin, temp);
1008                                 if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1009                                 {
1010                                         leaf->worldnodeframe = castshadowcount;
1011                                         for (j = 0, mark = leaf->firstmarksurface;j < leaf->nummarksurfaces;j++, mark++)
1012                                         {
1013                                                 surf = cl.worldmodel->surfaces + *mark;
1014                                                 if (surf->castshadow != castshadowcount)
1015                                                 {
1016                                                         f = DotProduct(e->origin, surf->plane->normal) - surf->plane->dist;
1017                                                         if (surf->flags & SURF_PLANEBACK)
1018                                                                 f = -f;
1019                                                         if (f > 0 && f < e->lightradius)
1020                                                         {
1021                                                                 temp[0] = bound(surf->poly_mins[0], e->origin[0], surf->poly_maxs[0]) - e->origin[0];
1022                                                                 temp[1] = bound(surf->poly_mins[1], e->origin[1], surf->poly_maxs[1]) - e->origin[1];
1023                                                                 temp[2] = bound(surf->poly_mins[2], e->origin[2], surf->poly_maxs[2]) - e->origin[2];
1024                                                                 if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1025                                                                         surf->castshadow = castshadowcount;
1026                                                         }
1027                                                 }
1028                                         }
1029                                 }
1030                         }
1031                 }
1032
1033                 e->numleafs = 0;
1034                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1035                         if (leaf->worldnodeframe == castshadowcount)
1036                                 e->numleafs++;
1037                 e->numsurfaces = 0;
1038                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1039                         if (surf->castshadow == castshadowcount)
1040                                 e->numsurfaces++;
1041
1042                 if (e->numleafs)
1043                         e->leafs = Mem_Alloc(r_shadow_mempool, e->numleafs * sizeof(mleaf_t *));
1044                 if (e->numsurfaces)
1045                         e->surfaces = Mem_Alloc(r_shadow_mempool, e->numsurfaces * sizeof(msurface_t *));
1046                 e->numleafs = 0;
1047                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1048                         if (leaf->worldnodeframe == castshadowcount)
1049                                 e->leafs[e->numleafs++] = leaf;
1050                 e->numsurfaces = 0;
1051                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1052                         if (surf->castshadow == castshadowcount)
1053                                 e->surfaces[e->numsurfaces++] = surf;
1054                 // find bounding box and sphere of lit surfaces
1055                 // (these will be used for creating a shape to clip the light)
1056                 radius2 = 0;
1057                 VectorCopy(e->origin, e->mins);
1058                 VectorCopy(e->origin, e->maxs);
1059                 for (j = 0;j < e->numsurfaces;j++)
1060                 {
1061                         surf = e->surfaces[j];
1062                         for (k = 0, v = surf->poly_verts;k < surf->poly_numverts;k++, v += 3)
1063                         {
1064                                 if (e->mins[0] > v[0]) e->mins[0] = v[0];if (e->maxs[0] < v[0]) e->maxs[0] = v[0];
1065                                 if (e->mins[1] > v[1]) e->mins[1] = v[1];if (e->maxs[1] < v[1]) e->maxs[1] = v[1];
1066                                 if (e->mins[2] > v[2]) e->mins[2] = v[2];if (e->maxs[2] < v[2]) e->maxs[2] = v[2];
1067                                 VectorSubtract(v, e->origin, temp);
1068                                 f = DotProduct(temp, temp);
1069                                 if (radius2 < f)
1070                                         radius2 = f;
1071                         }
1072                 }
1073                 e->cullradius = sqrt(radius2);
1074                 if (e->cullradius > e->lightradius)
1075                         e->cullradius = e->lightradius;
1076                 if (e->mins[0] < e->origin[0] - e->lightradius) e->mins[0] = e->origin[0] - e->lightradius;
1077                 if (e->maxs[0] > e->origin[0] + e->lightradius) e->maxs[0] = e->origin[0] + e->lightradius;
1078                 if (e->mins[1] < e->origin[1] - e->lightradius) e->mins[1] = e->origin[1] - e->lightradius;
1079                 if (e->maxs[1] > e->origin[1] + e->lightradius) e->maxs[1] = e->origin[1] + e->lightradius;
1080                 if (e->mins[2] < e->origin[2] - e->lightradius) e->mins[2] = e->origin[2] - e->lightradius;
1081                 if (e->maxs[2] > e->origin[2] + e->lightradius) e->maxs[2] = e->origin[2] + e->lightradius;
1082                 Con_Printf("%f %f %f, %f %f %f, %f, %f, %d, %d\n", e->mins[0], e->mins[1], e->mins[2], e->maxs[0], e->maxs[1], e->maxs[2], e->cullradius, e->lightradius, e->numleafs, e->numsurfaces);
1083                 // clip shadow volumes against eachother to remove unnecessary
1084                 // polygons (and sections of polygons)
1085                 maxverts = 256;
1086                 verts = NULL;
1087                 castshadowcount++;
1088                 for (j = 0;j < e->numsurfaces;j++)
1089                 {
1090                         surf = e->surfaces[j];
1091                         if (surf->flags & SURF_SHADOWCAST)
1092                         {
1093                                 surf->castshadow = castshadowcount;
1094                                 if (maxverts < surf->poly_numverts)
1095                                         maxverts = surf->poly_numverts;
1096                         }
1097                 }
1098                 e->shadowvolume = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1099                 // make a mesh to cast a shadow volume from
1100                 castmesh = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1101                 for (j = 0;j < e->numsurfaces;j++)
1102                         if (e->surfaces[j]->castshadow == castshadowcount)
1103                                 for (surfmesh = e->surfaces[j]->mesh;surfmesh;surfmesh = surfmesh->chain)
1104                                         Mod_ShadowMesh_AddMesh(r_shadow_mempool, castmesh, surfmesh->numverts, surfmesh->verts, surfmesh->numtriangles, surfmesh->index);
1105                 castmesh = Mod_ShadowMesh_Finish(r_shadow_mempool, castmesh);
1106
1107                 // cast shadow volume from castmesh
1108                 for (mesh = castmesh;mesh;mesh = mesh->next)
1109                 {
1110                         R_Shadow_ResizeTriangleFacingLight(castmesh->numtriangles);
1111                         R_Shadow_ResizeShadowElements(castmesh->numtriangles);
1112
1113                         if (maxverts < castmesh->numverts * 2)
1114                         {
1115                                 maxverts = castmesh->numverts * 2;
1116                                 if (verts)
1117                                         Mem_Free(verts);
1118                                 verts = NULL;
1119                         }
1120                         if (verts == NULL && maxverts > 0)
1121                                 verts = Mem_Alloc(r_shadow_mempool, maxverts * sizeof(float[4]));
1122
1123                         // now that we have the buffers big enough, construct shadow volume mesh
1124                         memcpy(verts, castmesh->verts, castmesh->numverts * sizeof(float[4]));
1125                         R_Shadow_ProjectVertices(verts, castmesh->numverts, e->origin, 1000000.0f);//, e->lightradius);
1126                         R_Shadow_MakeTriangleShadowFlags(castmesh->elements, verts, castmesh->numtriangles, trianglefacinglight, e->origin, e->lightradius);
1127                         tris = R_Shadow_BuildShadowVolumeTriangles(castmesh->elements, castmesh->neighbors, castmesh->numtriangles, castmesh->numverts, trianglefacinglight, shadowelements);
1128                         // add the constructed shadow volume mesh
1129                         Mod_ShadowMesh_AddMesh(r_shadow_mempool, e->shadowvolume, castmesh->numverts, verts, tris, shadowelements);
1130                 }
1131                 // we're done with castmesh now
1132                 Mod_ShadowMesh_Free(castmesh);
1133                 e->shadowvolume = Mod_ShadowMesh_Finish(r_shadow_mempool, e->shadowvolume);
1134                 for (l = 0, mesh = e->shadowvolume;mesh;mesh = mesh->next)
1135                         l += mesh->numtriangles;
1136                 Con_Printf("static shadow volume built containing %i triangles\n", l);
1137         }
1138 }
1139
1140 void R_Shadow_FreeWorldLight(worldlight_t *light)
1141 {
1142         worldlight_t **lightpointer;
1143         for (lightpointer = &r_shadow_worldlightchain;*lightpointer && *lightpointer != light;lightpointer = &(*lightpointer)->next);
1144         if (*lightpointer != light)
1145                 Sys_Error("R_Shadow_FreeWorldLight: light not linked into chain\n");
1146         *lightpointer = light->next;
1147         if (light->cubemapname)
1148                 Mem_Free(light->cubemapname);
1149         if (light->shadowvolume)
1150                 Mod_ShadowMesh_Free(light->shadowvolume);
1151         if (light->surfaces)
1152                 Mem_Free(light->surfaces);
1153         if (light->leafs)
1154                 Mem_Free(light->leafs);
1155         Mem_Free(light);
1156 }
1157
1158 void R_Shadow_ClearWorldLights(void)
1159 {
1160         while (r_shadow_worldlightchain)
1161                 R_Shadow_FreeWorldLight(r_shadow_worldlightchain);
1162         r_shadow_selectedlight = NULL;
1163 }
1164
1165 void R_Shadow_SelectLight(worldlight_t *light)
1166 {
1167         if (r_shadow_selectedlight)
1168                 r_shadow_selectedlight->selected = false;
1169         r_shadow_selectedlight = light;
1170         if (r_shadow_selectedlight)
1171                 r_shadow_selectedlight->selected = true;
1172 }
1173
1174 void R_Shadow_FreeSelectedWorldLight(void)
1175 {
1176         if (r_shadow_selectedlight)
1177         {
1178                 R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1179                 r_shadow_selectedlight = NULL;
1180         }
1181 }
1182
1183 void R_DrawLightSprite(int texnum, const vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca)
1184 {
1185         rmeshstate_t m;
1186         float diff[3];
1187
1188         if (fogenabled)
1189         {
1190                 VectorSubtract(origin, r_origin, diff);
1191                 ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
1192         }
1193
1194         memset(&m, 0, sizeof(m));
1195         m.blendfunc1 = GL_SRC_ALPHA;
1196         m.blendfunc2 = GL_ONE;
1197         m.tex[0] = texnum;
1198         R_Mesh_Matrix(&r_identitymatrix);
1199         R_Mesh_State(&m);
1200
1201         GL_Color(cr * r_colorscale, cg * r_colorscale, cb * r_colorscale, ca);
1202         varray_texcoord[0][ 0] = 0;varray_texcoord[0][ 1] = 0;
1203         varray_texcoord[0][ 4] = 0;varray_texcoord[0][ 5] = 1;
1204         varray_texcoord[0][ 8] = 1;varray_texcoord[0][ 9] = 1;
1205         varray_texcoord[0][12] = 1;varray_texcoord[0][13] = 0;
1206         varray_vertex[0] = origin[0] - vright[0] * scale - vup[0] * scale;
1207         varray_vertex[1] = origin[1] - vright[1] * scale - vup[1] * scale;
1208         varray_vertex[2] = origin[2] - vright[2] * scale - vup[2] * scale;
1209         varray_vertex[4] = origin[0] - vright[0] * scale + vup[0] * scale;
1210         varray_vertex[5] = origin[1] - vright[1] * scale + vup[1] * scale;
1211         varray_vertex[6] = origin[2] - vright[2] * scale + vup[2] * scale;
1212         varray_vertex[8] = origin[0] + vright[0] * scale + vup[0] * scale;
1213         varray_vertex[9] = origin[1] + vright[1] * scale + vup[1] * scale;
1214         varray_vertex[10] = origin[2] + vright[2] * scale + vup[2] * scale;
1215         varray_vertex[12] = origin[0] + vright[0] * scale - vup[0] * scale;
1216         varray_vertex[13] = origin[1] + vright[1] * scale - vup[1] * scale;
1217         varray_vertex[14] = origin[2] + vright[2] * scale - vup[2] * scale;
1218         R_Mesh_Draw(4, 2, polygonelements);
1219 }
1220
1221 void R_Shadow_DrawCursorCallback(const void *calldata1, int calldata2)
1222 {
1223         cachepic_t *pic;
1224         pic = Draw_CachePic("gfx/crosshair1.tga");
1225         if (pic)
1226                 R_DrawLightSprite(R_GetTexture(pic->tex), r_editlights_cursorlocation, r_editlights_cursorgrid.value * 0.5f, 1, 1, 1, 0.5);
1227 }
1228
1229 void R_Shadow_DrawLightSpriteCallback(const void *calldata1, int calldata2)
1230 {
1231         float intensity;
1232         const worldlight_t *light;
1233         light = calldata1;
1234         intensity = 0.5;
1235         if (light->selected)
1236                 intensity = 0.75 + 0.25 * sin(realtime * M_PI * 4.0);
1237         if (light->shadowvolume)
1238                 R_DrawLightSprite(calldata2, light->origin, 8, intensity, intensity, intensity, 0.5);
1239         else
1240                 R_DrawLightSprite(calldata2, light->origin, 8, intensity * 0.5, intensity * 0.5, intensity * 0.5, 0.5);
1241 }
1242
1243 void R_Shadow_DrawLightSprites(void)
1244 {
1245         int i, texnums[5];
1246         cachepic_t *pic;
1247         worldlight_t *light;
1248
1249         for (i = 0;i < 5;i++)
1250         {
1251                 pic = Draw_CachePic(va("gfx/crosshair%i.tga", i + 1));
1252                 if (pic)
1253                         texnums[i] = R_GetTexture(pic->tex);
1254                 else
1255                         texnums[i] = 0;
1256         }
1257
1258         for (light = r_shadow_worldlightchain;light;light = light->next)
1259                 R_MeshQueue_AddTransparent(light->origin, R_Shadow_DrawLightSpriteCallback, light, texnums[((int) light) % 5]);
1260         R_MeshQueue_AddTransparent(r_editlights_cursorlocation, R_Shadow_DrawCursorCallback, NULL, 0);
1261 }
1262
1263 void R_Shadow_SelectLightInView(void)
1264 {
1265         float bestrating, rating, temp[3];
1266         worldlight_t *best, *light;
1267         best = NULL;
1268         bestrating = 0;
1269         for (light = r_shadow_worldlightchain;light;light = light->next)
1270         {
1271                 VectorSubtract(light->origin, r_refdef.vieworg, temp);
1272                 rating = (DotProduct(temp, vpn) / sqrt(DotProduct(temp, temp)));
1273                 if (rating >= 0.95)
1274                 {
1275                         rating /= (1 + 0.0625f * sqrt(DotProduct(temp, temp)));
1276                         if (bestrating < rating && CL_TraceLine(light->origin, r_refdef.vieworg, NULL, NULL, 0, true, NULL) == 1.0f)
1277                         {
1278                                 bestrating = rating;
1279                                 best = light;
1280                         }
1281                 }
1282         }
1283         R_Shadow_SelectLight(best);
1284 }
1285
1286 void R_Shadow_LoadWorldLights(void)
1287 {
1288         int n, a, style;
1289         char name[MAX_QPATH], cubemapname[MAX_QPATH], *lightsstring, *s, *t;
1290         float origin[3], radius, color[3];
1291         COM_StripExtension(cl.worldmodel->name, name);
1292         strcat(name, ".rtlights");
1293         lightsstring = COM_LoadFile(name, false);
1294         if (lightsstring)
1295         {
1296                 s = lightsstring;
1297                 n = 0;
1298                 while (*s)
1299                 {
1300                         t = s;
1301                         while (*s && *s != '\n')
1302                                 s++;
1303                         if (!*s)
1304                                 break;
1305                         *s = 0;
1306                         a = sscanf(t, "%f %f %f %f %f %f %f %d %s", &origin[0], &origin[1], &origin[2], &radius, &color[0], &color[1], &color[2], &style, &cubemapname);
1307                         if (a < 9)
1308                                 cubemapname[0] = 0;
1309                         *s = '\n';
1310                         if (a < 8)
1311                         {
1312                                 Con_Printf("found %d parameters on line %i, should be 8 or 9 parameters (origin[0] origin[1] origin[2] radius color[0] color[1] color[2] style cubemapname)\n", a, n + 1);
1313                                 break;
1314                         }
1315                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1316                         s++;
1317                         n++;
1318                 }
1319                 if (*s)
1320                         Con_Printf("invalid rtlights file \"%s\"\n", name);
1321                 Mem_Free(lightsstring);
1322         }
1323 }
1324
1325 void R_Shadow_SaveWorldLights(void)
1326 {
1327         worldlight_t *light;
1328         int bufchars, bufmaxchars;
1329         char *buf, *oldbuf;
1330         char name[MAX_QPATH];
1331         char line[1024];
1332         if (!r_shadow_worldlightchain)
1333                 return;
1334         COM_StripExtension(cl.worldmodel->name, name);
1335         strcat(name, ".rtlights");
1336         bufchars = bufmaxchars = 0;
1337         buf = NULL;
1338         for (light = r_shadow_worldlightchain;light;light = light->next)
1339         {
1340                 sprintf(line, "%g %g %g %g %g %g %g %d %s\n", light->origin[0], light->origin[1], light->origin[2], light->lightradius, light->light[0], light->light[1], light->light[2], light->style, light->cubemapname ? light->cubemapname : "");
1341                 if (bufchars + strlen(line) > bufmaxchars)
1342                 {
1343                         bufmaxchars = bufchars + strlen(line) + 2048;
1344                         oldbuf = buf;
1345                         buf = Mem_Alloc(r_shadow_mempool, bufmaxchars);
1346                         if (oldbuf)
1347                         {
1348                                 if (bufchars)
1349                                         memcpy(buf, oldbuf, bufchars);
1350                                 Mem_Free(oldbuf);
1351                         }
1352                 }
1353                 if (strlen(line))
1354                 {
1355                         memcpy(buf + bufchars, line, strlen(line));
1356                         bufchars += strlen(line);
1357                 }
1358         }
1359         if (bufchars)
1360                 COM_WriteFile(name, buf, bufchars);
1361         if (buf)
1362                 Mem_Free(buf);
1363 }
1364
1365 void R_Shadow_LoadLightsFile(void)
1366 {
1367         int n, a, style;
1368         char name[MAX_QPATH], *lightsstring, *s, *t;
1369         float origin[3], radius, color[3], subtract, spotdir[3], spotcone, falloff, distbias;
1370         COM_StripExtension(cl.worldmodel->name, name);
1371         strcat(name, ".lights");
1372         lightsstring = COM_LoadFile(name, false);
1373         if (lightsstring)
1374         {
1375                 s = lightsstring;
1376                 n = 0;
1377                 while (*s)
1378                 {
1379                         t = s;
1380                         while (*s && *s != '\n')
1381                                 s++;
1382                         if (!*s)
1383                                 break;
1384                         *s = 0;
1385                         a = sscanf(t, "%f %f %f %f %f %f %f %f %f %f %f %f %f %d", &origin[0], &origin[1], &origin[2], &falloff, &color[0], &color[1], &color[2], &subtract, &spotdir[0], &spotdir[1], &spotdir[2], &spotcone, &distbias, &style);
1386                         *s = '\n';
1387                         if (a < 14)
1388                         {
1389                                 Con_Printf("invalid lights file, found %d parameters on line %i, should be 14 parameters (origin[0] origin[1] origin[2] falloff light[0] light[1] light[2] subtract spotdir[0] spotdir[1] spotdir[2] spotcone distancebias style)\n", a, n + 1);
1390                                 break;
1391                         }
1392                         radius = sqrt(DotProduct(color, color) / (falloff * falloff * 8192.0f * 8192.0f));
1393                         radius = bound(15, radius, 4096);
1394                         VectorScale(color, (1.0f / (8388608.0f)), color);
1395                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL);
1396                         s++;
1397                         n++;
1398                 }
1399                 if (*s)
1400                         Con_Printf("invalid lights file \"%s\"\n", name);
1401                 Mem_Free(lightsstring);
1402         }
1403 }
1404
1405 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void)
1406 {
1407         int entnum, style, islight;
1408         char key[256], value[1024];
1409         float origin[3], radius, color[3], light, scale, originhack[3], overridecolor[3];
1410         const char *data;
1411
1412         data = cl.worldmodel->entities;
1413         if (!data)
1414                 return;
1415         for (entnum = 0;COM_ParseToken(&data) && com_token[0] == '{';entnum++)
1416         {
1417                 light = 0;
1418                 origin[0] = origin[1] = origin[2] = 0;
1419                 originhack[0] = originhack[1] = originhack[2] = 0;
1420                 color[0] = color[1] = color[2] = 1;
1421                 overridecolor[0] = overridecolor[1] = overridecolor[2] = 1;
1422                 scale = 1;
1423                 style = 0;
1424                 islight = false;
1425                 while (1)
1426                 {
1427                         if (!COM_ParseToken(&data))
1428                                 break; // error
1429                         if (com_token[0] == '}')
1430                                 break; // end of entity
1431                         if (com_token[0] == '_')
1432                                 strcpy(key, com_token + 1);
1433                         else
1434                                 strcpy(key, com_token);
1435                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
1436                                 key[strlen(key)-1] = 0;
1437                         if (!COM_ParseToken(&data))
1438                                 break; // error
1439                         strcpy(value, com_token);
1440
1441                         // now that we have the key pair worked out...
1442                         if (!strcmp("light", key))
1443                                 light = atof(value);
1444                         else if (!strcmp("origin", key))
1445                                 sscanf(value, "%f %f %f", &origin[0], &origin[1], &origin[2]);
1446                         else if (!strcmp("color", key))
1447                                 sscanf(value, "%f %f %f", &color[0], &color[1], &color[2]);
1448                         else if (!strcmp("wait", key))
1449                                 scale = atof(value);
1450                         else if (!strcmp("classname", key))
1451                         {
1452                                 if (!strncmp(value, "light", 5))
1453                                 {
1454                                         islight = true;
1455                                         if (!strcmp(value, "light_fluoro"))
1456                                         {
1457                                                 originhack[0] = 0;
1458                                                 originhack[1] = 0;
1459                                                 originhack[2] = 0;
1460                                                 overridecolor[0] = 1;
1461                                                 overridecolor[1] = 1;
1462                                                 overridecolor[2] = 1;
1463                                         }
1464                                         if (!strcmp(value, "light_fluorospark"))
1465                                         {
1466                                                 originhack[0] = 0;
1467                                                 originhack[1] = 0;
1468                                                 originhack[2] = 0;
1469                                                 overridecolor[0] = 1;
1470                                                 overridecolor[1] = 1;
1471                                                 overridecolor[2] = 1;
1472                                         }
1473                                         if (!strcmp(value, "light_globe"))
1474                                         {
1475                                                 originhack[0] = 0;
1476                                                 originhack[1] = 0;
1477                                                 originhack[2] = 0;
1478                                                 overridecolor[0] = 1;
1479                                                 overridecolor[1] = 0.8;
1480                                                 overridecolor[2] = 0.4;
1481                                         }
1482                                         if (!strcmp(value, "light_flame_large_yellow"))
1483                                         {
1484                                                 originhack[0] = 0;
1485                                                 originhack[1] = 0;
1486                                                 originhack[2] = 48;
1487                                                 overridecolor[0] = 1;
1488                                                 overridecolor[1] = 0.7;
1489                                                 overridecolor[2] = 0.2;
1490                                         }
1491                                         if (!strcmp(value, "light_flame_small_yellow"))
1492                                         {
1493                                                 originhack[0] = 0;
1494                                                 originhack[1] = 0;
1495                                                 originhack[2] = 40;
1496                                                 overridecolor[0] = 1;
1497                                                 overridecolor[1] = 0.7;
1498                                                 overridecolor[2] = 0.2;
1499                                         }
1500                                         if (!strcmp(value, "light_torch_small_white"))
1501                                         {
1502                                                 originhack[0] = 0;
1503                                                 originhack[1] = 0;
1504                                                 originhack[2] = 40;
1505                                                 overridecolor[0] = 1;
1506                                                 overridecolor[1] = 0.9;
1507                                                 overridecolor[2] = 0.7;
1508                                         }
1509                                         if (!strcmp(value, "light_torch_small_walltorch"))
1510                                         {
1511                                                 originhack[0] = 0;
1512                                                 originhack[1] = 0;
1513                                                 originhack[2] = 40;
1514                                                 overridecolor[0] = 1;
1515                                                 overridecolor[1] = 0.7;
1516                                                 overridecolor[2] = 0.2;
1517                                         }
1518                                 }
1519                         }
1520                         else if (!strcmp("style", key))
1521                                 style = atoi(value);
1522                 }
1523                 if (light <= 0 && islight)
1524                         light = 300;
1525                 radius = bound(15, light * r_editlights_quakelightsizescale.value / scale, 1048576);
1526                 light = sqrt(bound(0, light, 1048576)) * (1.0f / 16.0f);
1527                 if (color[0] == 1 && color[1] == 1 && color[2] == 1)
1528                         VectorCopy(overridecolor, color);
1529                 VectorScale(color, light, color);
1530                 VectorAdd(origin, originhack, origin);
1531                 if (radius >= 15)
1532                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL);
1533         }
1534 }
1535
1536
1537 void R_Shadow_SetCursorLocationForView(void)
1538 {
1539         vec_t dist, push, frac;
1540         vec3_t dest, endpos, normal;
1541         VectorMA(r_refdef.vieworg, r_editlights_cursordistance.value, vpn, dest);
1542         frac = CL_TraceLine(r_refdef.vieworg, dest, endpos, normal, 0, true, NULL);
1543         if (frac < 1)
1544         {
1545                 dist = frac * r_editlights_cursordistance.value;
1546                 push = r_editlights_cursorpushback.value;
1547                 if (push > dist)
1548                         push = dist;
1549                 push = -push;
1550                 VectorMA(endpos, push, vpn, endpos);
1551                 VectorMA(endpos, r_editlights_cursorpushoff.value, normal, endpos);
1552         }
1553         r_editlights_cursorlocation[0] = floor(endpos[0] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1554         r_editlights_cursorlocation[1] = floor(endpos[1] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1555         r_editlights_cursorlocation[2] = floor(endpos[2] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1556 }
1557
1558 void R_Shadow_UpdateLightingMode(void)
1559 {
1560         r_shadow_lightingmode = 0;
1561         if (r_shadow_realtime.integer)
1562         {
1563                 if (r_shadow_worldlightchain)
1564                         r_shadow_lightingmode = 2;
1565                 else
1566                         r_shadow_lightingmode = 1;
1567         }
1568 }
1569
1570 void R_Shadow_UpdateWorldLightSelection(void)
1571 {
1572         if (r_editlights.integer)
1573         {
1574                 R_Shadow_SetCursorLocationForView();
1575                 R_Shadow_SelectLightInView();
1576                 R_Shadow_DrawLightSprites();
1577         }
1578         else
1579                 R_Shadow_SelectLight(NULL);
1580 }
1581
1582 void R_Shadow_EditLights_Clear_f(void)
1583 {
1584         R_Shadow_ClearWorldLights();
1585 }
1586
1587 void R_Shadow_EditLights_Reload_f(void)
1588 {
1589         r_shadow_reloadlights = true;
1590 }
1591
1592 void R_Shadow_EditLights_Save_f(void)
1593 {
1594         if (cl.worldmodel)
1595                 R_Shadow_SaveWorldLights();
1596 }
1597
1598 void R_Shadow_EditLights_ImportLightEntitiesFromMap_f(void)
1599 {
1600         R_Shadow_ClearWorldLights();
1601         R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
1602 }
1603
1604 void R_Shadow_EditLights_ImportLightsFile_f(void)
1605 {
1606         R_Shadow_ClearWorldLights();
1607         R_Shadow_LoadLightsFile();
1608 }
1609
1610 void R_Shadow_EditLights_Spawn_f(void)
1611 {
1612         vec3_t origin, color;
1613         vec_t radius;
1614         int style;
1615         const char *cubemapname;
1616         if (!r_editlights.integer)
1617         {
1618                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1619                 return;
1620         }
1621         if (Cmd_Argc() <= 7)
1622         {
1623                 radius = 200;
1624                 color[0] = color[1] = color[2] = 1;
1625                 style = 0;
1626                 cubemapname = NULL;
1627                 if (Cmd_Argc() >= 2)
1628                 {
1629                         radius = atof(Cmd_Argv(1));
1630                         if (Cmd_Argc() >= 3)
1631                         {
1632                                 color[0] = atof(Cmd_Argv(2));
1633                                 color[1] = color[0];
1634                                 color[2] = color[0];
1635                                 if (Cmd_Argc() >= 5)
1636                                 {
1637                                         color[1] = atof(Cmd_Argv(3));
1638                                         color[2] = atof(Cmd_Argv(4));
1639                                         if (Cmd_Argc() >= 6)
1640                                         {
1641                                                 style = atoi(Cmd_Argv(5));
1642                                                 if (Cmd_Argc() >= 7)
1643                                                         cubemapname = Cmd_Argv(6);
1644                                         }
1645                                 }
1646                         }
1647                 }
1648                 if (cubemapname && !cubemapname[0])
1649                         cubemapname = NULL;
1650                 if (radius >= 16 && color[0] >= 0 && color[1] >= 0 && color[2] >= 0 && style >= 0 && style < 256 && (color[0] >= 0.1 || color[1] >= 0.1 || color[2] >= 0.1))
1651                 {
1652                         VectorCopy(r_editlights_cursorlocation, origin);
1653                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1654                         return;
1655                 }
1656         }
1657         Con_Printf("usage: r_editlights_spawn radius red green blue [style [cubemap]]\n");
1658 }
1659
1660 void R_Shadow_EditLights_Edit_f(void)
1661 {
1662         vec3_t origin, color;
1663         vec_t radius;
1664         int style;
1665         const char *cubemapname;
1666         if (!r_editlights.integer)
1667         {
1668                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1669                 return;
1670         }
1671         if (!r_shadow_selectedlight)
1672         {
1673                 Con_Printf("No selected light.\n");
1674                 return;
1675         }
1676         if (Cmd_Argc() <= 7)
1677         {
1678                 radius = 200;
1679                 color[0] = color[1] = color[2] = 1;
1680                 style = 0;
1681                 cubemapname = NULL;
1682                 if (Cmd_Argc() >= 2)
1683                 {
1684                         radius = atof(Cmd_Argv(1));
1685                         if (Cmd_Argc() >= 3)
1686                         {
1687                                 color[0] = atof(Cmd_Argv(2));
1688                                 color[1] = color[0];
1689                                 color[2] = color[0];
1690                                 if (Cmd_Argc() >= 5)
1691                                 {
1692                                         color[1] = atof(Cmd_Argv(3));
1693                                         color[2] = atof(Cmd_Argv(4));
1694                                         if (Cmd_Argc() >= 6)
1695                                         {
1696                                                 style = atoi(Cmd_Argv(5));
1697                                                 if (Cmd_Argc() >= 7)
1698                                                         cubemapname = Cmd_Argv(6);
1699                                         }
1700                                 }
1701                         }
1702                 }
1703                 if (cubemapname && !cubemapname[0])
1704                         cubemapname = NULL;
1705                 if (radius >= 16 && color[0] >= 0 && color[1] >= 0 && color[2] >= 0 && style >= 0 && style < 256 && (color[0] >= 0.1 || color[1] >= 0.1 || color[2] >= 0.1))
1706                 {
1707                         VectorCopy(r_shadow_selectedlight->origin, origin);
1708                         R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1709                         r_shadow_selectedlight = NULL;
1710                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname);
1711                         return;
1712                 }
1713         }
1714         Con_Printf("usage: r_editlights_edit radius red green blue [style [cubemap]]\n");
1715 }
1716
1717 void R_Shadow_EditLights_Remove_f(void)
1718 {
1719         if (!r_editlights.integer)
1720         {
1721                 Con_Printf("Cannot remove light when not in editing mode.  Set r_editlights to 1.\n");
1722                 return;
1723         }
1724         if (!r_shadow_selectedlight)
1725         {
1726                 Con_Printf("No selected light.\n");
1727                 return;
1728         }
1729         R_Shadow_FreeSelectedWorldLight();
1730 }
1731
1732 void R_Shadow_EditLights_Init(void)
1733 {
1734         Cvar_RegisterVariable(&r_editlights);
1735         Cvar_RegisterVariable(&r_editlights_cursordistance);
1736         Cvar_RegisterVariable(&r_editlights_cursorpushback);
1737         Cvar_RegisterVariable(&r_editlights_cursorpushoff);
1738         Cvar_RegisterVariable(&r_editlights_cursorgrid);
1739         Cvar_RegisterVariable(&r_editlights_quakelightsizescale);
1740         Cmd_AddCommand("r_editlights_clear", R_Shadow_EditLights_Clear_f);
1741         Cmd_AddCommand("r_editlights_reload", R_Shadow_EditLights_Reload_f);
1742         Cmd_AddCommand("r_editlights_save", R_Shadow_EditLights_Save_f);
1743         Cmd_AddCommand("r_editlights_spawn", R_Shadow_EditLights_Spawn_f);
1744         Cmd_AddCommand("r_editlights_edit", R_Shadow_EditLights_Edit_f);
1745         Cmd_AddCommand("r_editlights_remove", R_Shadow_EditLights_Remove_f);
1746         Cmd_AddCommand("r_editlights_importlightentitiesfrommap", R_Shadow_EditLights_ImportLightEntitiesFromMap_f);
1747         Cmd_AddCommand("r_editlights_importlightsfile", R_Shadow_EditLights_ImportLightsFile_f);
1748 }