r_shadow.c

   1
   2 #include "quakedef.h"
   3 #include "r_shadow.h"
   4 #include "cl_collision.h"
   5 #include "portals.h"
   6
   7 extern void R_Shadow_EditLights_Init(void);
   8
   9 #define SHADOWSTAGE_NONE 0
  10 #define SHADOWSTAGE_STENCIL 1
  11 #define SHADOWSTAGE_LIGHT 2
  12 #define SHADOWSTAGE_ERASESTENCIL 3
  13
  14 int r_shadowstage = SHADOWSTAGE_NONE;
  15 int r_shadow_reloadlights = false;
  16
  17 int r_shadow_lightingmode = 0;
  18
  19 mempool_t *r_shadow_mempool;
  20
  21 int maxshadowelements;
  22 int *shadowelements;
  23 int maxtrianglefacinglight;
  24 qbyte *trianglefacinglight;
  25
  26 rtexturepool_t *r_shadow_texturepool;
  27 rtexture_t *r_shadow_normalscubetexture;
  28 rtexture_t *r_shadow_attenuation2dtexture;
  29 rtexture_t *r_shadow_blankbumptexture;
  30 rtexture_t *r_shadow_blankglosstexture;
  31 rtexture_t *r_shadow_blankwhitetexture;
  32
  33 cvar_t r_shadow_lightattenuationpower = {0, "r_shadow_lightattenuationpower", "0.5"};
  34 cvar_t r_shadow_lightattenuationscale = {0, "r_shadow_lightattenuationscale", "1"};
  35 cvar_t r_shadow_lightintensityscale = {0, "r_shadow_lightintensityscale", "1"};
  36 cvar_t r_shadow_realtime = {0, "r_shadow_realtime", "0"};
  37 cvar_t r_shadow_gloss = {0, "r_shadow_gloss", "1"};
  38 cvar_t r_shadow_debuglight = {0, "r_shadow_debuglight", "-1"};
  39 cvar_t r_shadow_scissor = {0, "r_shadow_scissor", "1"};
  40 cvar_t r_shadow_bumpscale_bumpmap = {0, "r_shadow_bumpscale_bumpmap", "4"};
  41 cvar_t r_shadow_bumpscale_basetexture = {0, "r_shadow_bumpscale_basetexture", "0"};
  42 cvar_t r_shadow_shadownudge = {0, "r_shadow_shadownudge", "1"};
  43 cvar_t r_shadow_portallight = {0, "r_shadow_portallight", "1"};
  44
  45 int c_rt_lights, c_rt_clears, c_rt_scissored;
  46 int c_rt_shadowmeshes, c_rt_shadowtris, c_rt_lightmeshes, c_rt_lighttris;
  47 int c_rtcached_shadowmeshes, c_rtcached_shadowtris;
  48
  49 void R_Shadow_ClearWorldLights(void);
  50 void R_Shadow_SaveWorldLights(void);
  51 void R_Shadow_LoadWorldLights(void);
  52 void R_Shadow_LoadLightsFile(void);
  53 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void);
  54
  55 void r_shadow_start(void)
  56 {
  57         // allocate vertex processing arrays
  58         r_shadow_mempool = Mem_AllocPool("R_Shadow");
  59         maxshadowelements = 0;
  60         shadowelements = NULL;
  61         maxtrianglefacinglight = 0;
  62         trianglefacinglight = NULL;
  63         r_shadow_normalscubetexture = NULL;
  64         r_shadow_attenuation2dtexture = NULL;
  65         r_shadow_blankbumptexture = NULL;
  66         r_shadow_blankglosstexture = NULL;
  67         r_shadow_blankwhitetexture = NULL;
  68         r_shadow_texturepool = NULL;
  69         R_Shadow_ClearWorldLights();
  70         r_shadow_reloadlights = true;
  71 }
  72
  73 void r_shadow_shutdown(void)
  74 {
  75         R_Shadow_ClearWorldLights();
  76         r_shadow_reloadlights = true;
  77         r_shadow_normalscubetexture = NULL;
  78         r_shadow_attenuation2dtexture = NULL;
  79         r_shadow_blankbumptexture = NULL;
  80         r_shadow_blankglosstexture = NULL;
  81         r_shadow_blankwhitetexture = NULL;
  82         R_FreeTexturePool(&r_shadow_texturepool);
  83         maxshadowelements = 0;
  84         shadowelements = NULL;
  85         maxtrianglefacinglight = 0;
  86         trianglefacinglight = NULL;
  87         Mem_FreePool(&r_shadow_mempool);
  88 }
  89
  90 void r_shadow_newmap(void)
  91 {
  92         R_Shadow_ClearWorldLights();
  93         r_shadow_reloadlights = true;
  94 }
  95
  96 void R_Shadow_Init(void)
  97 {
  98         Cvar_RegisterVariable(&r_shadow_lightattenuationpower);
  99         Cvar_RegisterVariable(&r_shadow_lightattenuationscale);
 100         Cvar_RegisterVariable(&r_shadow_lightintensityscale);
 101         Cvar_RegisterVariable(&r_shadow_realtime);
 102         Cvar_RegisterVariable(&r_shadow_gloss);
 103         Cvar_RegisterVariable(&r_shadow_debuglight);
 104         Cvar_RegisterVariable(&r_shadow_scissor);
 105         Cvar_RegisterVariable(&r_shadow_bumpscale_bumpmap);
 106         Cvar_RegisterVariable(&r_shadow_bumpscale_basetexture);
 107         Cvar_RegisterVariable(&r_shadow_shadownudge);
 108         Cvar_RegisterVariable(&r_shadow_portallight);
 109         R_Shadow_EditLights_Init();
 110         R_RegisterModule("R_Shadow", r_shadow_start, r_shadow_shutdown, r_shadow_newmap);
 111 }
 112
 113 void R_Shadow_ProjectVertices(float *verts, int numverts, const float *relativelightorigin, float projectdistance)
 114 {
 115         int i;
 116         float *in, *out, diff[4];
 117         in = verts;
 118         out = verts + numverts * 4;
 119         for (i = 0;i < numverts;i++, in += 4, out += 4)
 120         {
 121                 VectorSubtract(in, relativelightorigin, diff);
 122                 VectorNormalizeFast(diff);
 123                 VectorMA(in, projectdistance, diff, out);
 124                 VectorMA(in, r_shadow_shadownudge.value, diff, in);
 125         }
 126 }
 127
 128 void R_Shadow_MakeTriangleShadowFlags(const int *elements, const float *vertex, int numtris, qbyte *trianglefacinglight, const float *relativelightorigin, float lightradius)
 129 {
 130         int i;
 131         const float *v0, *v1, *v2;
 132         for (i = 0;i < numtris;i++, elements += 3)
 133         {
 134                 // calculate triangle facing flag
 135                 v0 = vertex + elements[0] * 4;
 136                 v1 = vertex + elements[1] * 4;
 137                 v2 = vertex + elements[2] * 4;
 138                 // we do not need to normalize the surface normal because both sides
 139                 // of the comparison use it, therefore they are both multiplied the
 140                 // same amount...  furthermore the subtract can be done on the
 141                 // vectors, saving a little bit of math in the dotproducts
 142 #if 1
 143                 // fast version
 144                 // subtracts v1 from v0 and v2, combined into a crossproduct,
 145                 // combined with a dotproduct of the light location relative to the
 146                 // first point of the triangle (any point works, since the triangle
 147                 // is obviously flat), and finally a comparison to determine if the
 148                 // light is infront of the triangle (the goal of this statement)
 149                 trianglefacinglight[i] =
 150                    (relativelightorigin[0] - v0[0]) * ((v0[1] - v1[1]) * (v2[2] - v1[2]) - (v0[2] - v1[2]) * (v2[1] - v1[1]))
 151                  + (relativelightorigin[1] - v0[1]) * ((v0[2] - v1[2]) * (v2[0] - v1[0]) - (v0[0] - v1[0]) * (v2[2] - v1[2]))
 152                  + (relativelightorigin[2] - v0[2]) * ((v0[0] - v1[0]) * (v2[1] - v1[1]) - (v0[1] - v1[1]) * (v2[0] - v1[0])) > 0;
 153 #else
 154                 // readable version
 155                 {
 156                 float dir0[3], dir1[3], temp[3];
 157
 158                 // calculate two mostly perpendicular edge directions
 159                 VectorSubtract(v0, v1, dir0);
 160                 VectorSubtract(v2, v1, dir1);
 161
 162                 // we have two edge directions, we can calculate a third vector from
 163                 // them, which is the direction of the surface normal (it's magnitude
 164                 // is not 1 however)
 165                 CrossProduct(dir0, dir1, temp);
 166
 167                 // this is entirely unnecessary, but kept for clarity
 168                 //VectorNormalize(temp);
 169
 170                 // compare distance of light along normal, with distance of any point
 171                 // of the triangle along the same normal (the triangle is planar,
 172                 // I.E. flat, so all points give the same answer)
 173                 // the normal is not normalized because it is used on both sides of
 174                 // the comparison, so it's magnitude does not matter
 175                 trianglefacinglight[i] = DotProduct(relativelightorigin, temp) >= DotProduct(v0, temp);
 176                 }
 177 #endif
 178         }
 179 }
 180
 181 int R_Shadow_BuildShadowVolumeTriangles(const int *elements, const int *neighbors, int numtris, int numverts, const qbyte *trianglefacinglight, int *out)
 182 {
 183         int i, tris;
 184         // check each frontface for bordering backfaces,
 185         // and cast shadow polygons from those edges,
 186         // also create front and back caps for shadow volume
 187         tris = 0;
 188         for (i = 0;i < numtris;i++, elements += 3, neighbors += 3)
 189         {
 190                 if (trianglefacinglight[i])
 191                 {
 192                         // triangle is frontface and therefore casts shadow,
 193                         // output front and back caps for shadow volume
 194                         // front cap
 195                         out[0] = elements[0];
 196                         out[1] = elements[1];
 197                         out[2] = elements[2];
 198                         // rear cap (with flipped winding order)
 199                         out[3] = elements[0] + numverts;
 200                         out[4] = elements[2] + numverts;
 201                         out[5] = elements[1] + numverts;
 202                         out += 6;
 203                         tris += 2;
 204                         // check the edges
 205                         if (neighbors[0] < 0 || !trianglefacinglight[neighbors[0]])
 206                         {
 207                                 out[0] = elements[1];
 208                                 out[1] = elements[0];
 209                                 out[2] = elements[0] + numverts;
 210                                 out[3] = elements[1];
 211                                 out[4] = elements[0] + numverts;
 212                                 out[5] = elements[1] + numverts;
 213                                 out += 6;
 214                                 tris += 2;
 215                         }
 216                         if (neighbors[1] < 0 || !trianglefacinglight[neighbors[1]])
 217                         {
 218                                 out[0] = elements[2];
 219                                 out[1] = elements[1];
 220                                 out[2] = elements[1] + numverts;
 221                                 out[3] = elements[2];
 222                                 out[4] = elements[1] + numverts;
 223                                 out[5] = elements[2] + numverts;
 224                                 out += 6;
 225                                 tris += 2;
 226                         }
 227                         if (neighbors[2] < 0 || !trianglefacinglight[neighbors[2]])
 228                         {
 229                                 out[0] = elements[0];
 230                                 out[1] = elements[2];
 231                                 out[2] = elements[2] + numverts;
 232                                 out[3] = elements[0];
 233                                 out[4] = elements[2] + numverts;
 234                                 out[5] = elements[0] + numverts;
 235                                 out += 6;
 236                                 tris += 2;
 237                         }
 238                 }
 239         }
 240         return tris;
 241 }
 242
 243 void R_Shadow_ResizeTriangleFacingLight(int numtris)
 244 {
 245         // make sure trianglefacinglight is big enough for this volume
 246         if (maxtrianglefacinglight < numtris)
 247         {
 248                 maxtrianglefacinglight = numtris;
 249                 if (trianglefacinglight)
 250                         Mem_Free(trianglefacinglight);
 251                 trianglefacinglight = Mem_Alloc(r_shadow_mempool, maxtrianglefacinglight);
 252         }
 253 }
 254
 255 void R_Shadow_ResizeShadowElements(int numtris)
 256 {
 257         // make sure shadowelements is big enough for this volume
 258         if (maxshadowelements < numtris * 24)
 259         {
 260                 maxshadowelements = numtris * 24;
 261                 if (shadowelements)
 262                         Mem_Free(shadowelements);
 263                 shadowelements = Mem_Alloc(r_shadow_mempool, maxshadowelements * sizeof(int));
 264         }
 265 }
 266
 267 void R_Shadow_Volume(int numverts, int numtris, int *elements, int *neighbors, vec3_t relativelightorigin, float lightradius, float projectdistance)
 268 {
 269         int tris;
 270         if (projectdistance < 0.1)
 271         {
 272                 Con_Printf("R_Shadow_Volume: projectdistance %f\n");
 273                 return;
 274         }
 275 // terminology:
 276 //
 277 // frontface:
 278 // a triangle facing the light source
 279 //
 280 // backface:
 281 // a triangle not facing the light source
 282 //
 283 // shadow volume:
 284 // an extrusion of the frontfaces, beginning at the original geometry and
 285 // ending further from the light source than the original geometry
 286 // (presumably at least as far as the light's radius, if the light has a
 287 // radius at all), capped at both front and back to avoid any problems
 288 //
 289 // description:
 290 // draws the shadow volumes of the model.
 291 // requirements:
 292 // vertex locations must already be in varray_vertex before use.
 293 // varray_vertex must have capacity for numverts * 2.
 294
 295         // make sure trianglefacinglight is big enough for this volume
 296         if (maxtrianglefacinglight < numtris)
 297                 R_Shadow_ResizeTriangleFacingLight(numtris);
 298
 299         // make sure shadowelements is big enough for this volume
 300         if (maxshadowelements < numtris * 24)
 301                 R_Shadow_ResizeShadowElements(numtris);
 302
 303         // check which triangles are facing the light
 304         R_Shadow_MakeTriangleShadowFlags(elements, varray_vertex, numtris, trianglefacinglight, relativelightorigin, lightradius);
 305
 306         // generate projected vertices
 307         // by clever use of elements we'll construct the whole shadow from
 308         // the unprojected vertices and these projected vertices
 309         R_Shadow_ProjectVertices(varray_vertex, numverts, relativelightorigin, projectdistance);
 310
 311         // output triangle elements
 312         tris = R_Shadow_BuildShadowVolumeTriangles(elements, neighbors, numtris, numverts, trianglefacinglight, shadowelements);
 313         R_Shadow_RenderVolume(numverts * 2, tris, shadowelements);
 314 }
 315
 316 void R_Shadow_RenderVolume(int numverts, int numtris, int *elements)
 317 {
 318         if (!numverts || !numtris)
 319                 return;
 320         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 321         {
 322                 // increment stencil if backface is behind depthbuffer
 323                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 324                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 325                 R_Mesh_Draw(numverts, numtris, elements);
 326                 c_rt_shadowmeshes++;
 327                 c_rt_shadowtris += numtris;
 328                 // decrement stencil if frontface is behind depthbuffer
 329                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 330                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 331         }
 332         R_Mesh_Draw(numverts, numtris, elements);
 333         c_rt_shadowmeshes++;
 334         c_rt_shadowtris += numtris;
 335 }
 336
 337 void R_Shadow_RenderShadowMeshVolume(shadowmesh_t *firstmesh)
 338 {
 339         shadowmesh_t *mesh;
 340         if (r_shadowstage == SHADOWSTAGE_STENCIL)
 341         {
 342                 // increment stencil if backface is behind depthbuffer
 343                 qglCullFace(GL_BACK); // quake is backwards, this culls front faces
 344                 qglStencilOp(GL_KEEP, GL_INCR, GL_KEEP);
 345                 for (mesh = firstmesh;mesh;mesh = mesh->next)
 346                 {
 347                         R_Mesh_ResizeCheck(mesh->numverts);
 348                         memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 349                         R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 350                         c_rtcached_shadowmeshes++;
 351                         c_rtcached_shadowtris += mesh->numtriangles;
 352                 }
 353                 // decrement stencil if frontface is behind depthbuffer
 354                 qglCullFace(GL_FRONT); // quake is backwards, this culls back faces
 355                 qglStencilOp(GL_KEEP, GL_DECR, GL_KEEP);
 356         }
 357         for (mesh = firstmesh;mesh;mesh = mesh->next)
 358         {
 359                 R_Mesh_ResizeCheck(mesh->numverts);
 360                 memcpy(varray_vertex, mesh->verts, mesh->numverts * sizeof(float[4]));
 361                 R_Mesh_Draw(mesh->numverts, mesh->numtriangles, mesh->elements);
 362                 c_rtcached_shadowmeshes++;
 363                 c_rtcached_shadowtris += mesh->numtriangles;
 364         }
 365 }
 366
 367 float r_shadow_attenpower, r_shadow_attenscale;
 368 static void R_Shadow_MakeTextures(void)
 369 {
 370         int x, y, d, side;
 371         float v[3], s, t, intensity;
 372         qbyte *data;
 373         R_FreeTexturePool(&r_shadow_texturepool);
 374         r_shadow_texturepool = R_AllocTexturePool();
 375         r_shadow_attenpower = r_shadow_lightattenuationpower.value;
 376         r_shadow_attenscale = r_shadow_lightattenuationscale.value;
 377         data = Mem_Alloc(tempmempool, 6*128*128*4);
 378         data[0] = 128;
 379         data[1] = 128;
 380         data[2] = 255;
 381         data[3] = 255;
 382         r_shadow_blankbumptexture = R_LoadTexture2D(r_shadow_texturepool, "blankbump", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 383         data[0] = 64;
 384         data[1] = 64;
 385         data[2] = 64;
 386         data[3] = 255;
 387         r_shadow_blankglosstexture = R_LoadTexture2D(r_shadow_texturepool, "blankgloss", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 388         data[0] = 255;
 389         data[1] = 255;
 390         data[2] = 255;
 391         data[3] = 255;
 392         r_shadow_blankwhitetexture = R_LoadTexture2D(r_shadow_texturepool, "blankwhite", 1, 1, data, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
 393         for (side = 0;side < 6;side++)
 394         {
 395                 for (y = 0;y < 128;y++)
 396                 {
 397                         for (x = 0;x < 128;x++)
 398                         {
 399                                 s = (x + 0.5f) * (2.0f / 128.0f) - 1.0f;
 400                                 t = (y + 0.5f) * (2.0f / 128.0f) - 1.0f;
 401                                 switch(side)
 402                                 {
 403                                 case 0:
 404                                         v[0] = 1;
 405                                         v[1] = -t;
 406                                         v[2] = -s;
 407                                         break;
 408                                 case 1:
 409                                         v[0] = -1;
 410                                         v[1] = -t;
 411                                         v[2] = s;
 412                                         break;
 413                                 case 2:
 414                                         v[0] = s;
 415                                         v[1] = 1;
 416                                         v[2] = t;
 417                                         break;
 418                                 case 3:
 419                                         v[0] = s;
 420                                         v[1] = -1;
 421                                         v[2] = -t;
 422                                         break;
 423                                 case 4:
 424                                         v[0] = s;
 425                                         v[1] = -t;
 426                                         v[2] = 1;
 427                                         break;
 428                                 case 5:
 429                                         v[0] = -s;
 430                                         v[1] = -t;
 431                                         v[2] = -1;
 432                                         break;
 433                                 }
 434                                 intensity = 127.0f / sqrt(DotProduct(v, v));
 435                                 data[((side*128+y)*128+x)*4+0] = 128.0f + intensity * v[0];
 436                                 data[((side*128+y)*128+x)*4+1] = 128.0f + intensity * v[1];
 437                                 data[((side*128+y)*128+x)*4+2] = 128.0f + intensity * v[2];
 438                                 data[((side*128+y)*128+x)*4+3] = 255;
 439                         }
 440                 }
 441         }
 442         r_shadow_normalscubetexture = R_LoadTextureCubeMap(r_shadow_texturepool, "normalscube", 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP, NULL);
 443         for (y = 0;y < 128;y++)
 444         {
 445                 for (x = 0;x < 128;x++)
 446                 {
 447                         v[0] = (x + 0.5f) * (2.0f / (128.0f - 8.0f)) - 1.0f;
 448                         v[1] = (y + 0.5f) * (2.0f / (128.0f - 8.0f)) - 1.0f;
 449                         v[2] = 0;
 450                         intensity = 1.0f - sqrt(DotProduct(v, v));
 451                         if (intensity > 0)
 452                                 intensity = pow(intensity, r_shadow_attenpower);
 453                         intensity = bound(0, intensity * r_shadow_attenscale * 256.0f, 255.0f);
 454                         d = bound(0, intensity, 255);
 455                         data[((0*128+y)*128+x)*4+0] = d;
 456                         data[((0*128+y)*128+x)*4+1] = d;
 457                         data[((0*128+y)*128+x)*4+2] = d;
 458                         data[((0*128+y)*128+x)*4+3] = d;
 459                 }
 460         }
 461         r_shadow_attenuation2dtexture = R_LoadTexture2D(r_shadow_texturepool, "attenuation2d", 128, 128, data, TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_CLAMP | TEXF_ALPHA, NULL);
 462         Mem_Free(data);
 463 }
 464
 465 void R_Shadow_Stage_Begin(void)
 466 {
 467         rmeshstate_t m;
 468
 469         //cl.worldmodel->numlights = min(cl.worldmodel->numlights, 1);
 470         if (!r_shadow_attenuation2dtexture
 471          || r_shadow_lightattenuationpower.value != r_shadow_attenpower
 472          || r_shadow_lightattenuationscale.value != r_shadow_attenscale)
 473                 R_Shadow_MakeTextures();
 474         if (r_shadow_reloadlights && cl.worldmodel)
 475         {
 476                 R_Shadow_ClearWorldLights();
 477                 r_shadow_reloadlights = false;
 478                 R_Shadow_LoadWorldLights();
 479                 if (r_shadow_worldlightchain == NULL)
 480                 {
 481                         R_Shadow_LoadLightsFile();
 482                         if (r_shadow_worldlightchain == NULL)
 483                                 R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
 484                 }
 485         }
 486
 487         memset(&m, 0, sizeof(m));
 488         m.blendfunc1 = GL_ONE;
 489         m.blendfunc2 = GL_ZERO;
 490         R_Mesh_State(&m);
 491         GL_Color(0, 0, 0, 1);
 492         r_shadowstage = SHADOWSTAGE_NONE;
 493
 494         c_rt_lights = c_rt_clears = c_rt_scissored = 0;
 495         c_rt_shadowmeshes = c_rt_shadowtris = c_rt_lightmeshes = c_rt_lighttris = 0;
 496         c_rtcached_shadowmeshes = c_rtcached_shadowtris = 0;
 497 }
 498
 499 void R_Shadow_Stage_ShadowVolumes(void)
 500 {
 501         rmeshstate_t m;
 502         memset(&m, 0, sizeof(m));
 503         R_Mesh_TextureState(&m);
 504         GL_Color(1, 1, 1, 1);
 505         qglColorMask(0, 0, 0, 0);
 506         qglDisable(GL_BLEND);
 507         qglDepthMask(0);
 508         qglDepthFunc(GL_LESS);
 509         qglEnable(GL_STENCIL_TEST);
 510         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 511         qglStencilFunc(GL_ALWAYS, 128, 0xFF);
 512         qglEnable(GL_CULL_FACE);
 513         qglEnable(GL_DEPTH_TEST);
 514         r_shadowstage = SHADOWSTAGE_STENCIL;
 515         qglClear(GL_STENCIL_BUFFER_BIT);
 516         c_rt_clears++;
 517         // LordHavoc note: many shadow volumes reside entirely inside the world
 518         // (that is to say they are entirely bounded by their lit surfaces),
 519         // which can be optimized by handling things as an inverted light volume,
 520         // with the shadow boundaries of the world being simulated by an altered
 521         // (129) bias to stencil clearing on such lights
 522         // FIXME: generate inverted light volumes for use as shadow volumes and
 523         // optimize for them as noted above
 524 }
 525
 526 void R_Shadow_Stage_LightWithoutShadows(void)
 527 {
 528         rmeshstate_t m;
 529         memset(&m, 0, sizeof(m));
 530         R_Mesh_TextureState(&m);
 531         qglActiveTexture(GL_TEXTURE0_ARB);
 532
 533         qglEnable(GL_BLEND);
 534         qglBlendFunc(GL_ONE, GL_ONE);
 535         GL_Color(1, 1, 1, 1);
 536         qglColorMask(1, 1, 1, 1);
 537         qglDepthMask(0);
 538         qglDepthFunc(GL_EQUAL);
 539         qglDisable(GL_STENCIL_TEST);
 540         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 541         qglStencilFunc(GL_EQUAL, 128, 0xFF);
 542         qglEnable(GL_CULL_FACE);
 543         qglEnable(GL_DEPTH_TEST);
 544         r_shadowstage = SHADOWSTAGE_LIGHT;
 545         c_rt_lights++;
 546 }
 547
 548 void R_Shadow_Stage_LightWithShadows(void)
 549 {
 550         rmeshstate_t m;
 551         memset(&m, 0, sizeof(m));
 552         R_Mesh_TextureState(&m);
 553         qglActiveTexture(GL_TEXTURE0_ARB);
 554
 555         qglEnable(GL_BLEND);
 556         qglBlendFunc(GL_ONE, GL_ONE);
 557         GL_Color(1, 1, 1, 1);
 558         qglColorMask(1, 1, 1, 1);
 559         qglDepthMask(0);
 560         qglDepthFunc(GL_EQUAL);
 561         qglEnable(GL_STENCIL_TEST);
 562         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 563         // only draw light where this geometry was already rendered AND the
 564         // stencil is 128 (values other than this mean shadow)
 565         qglStencilFunc(GL_EQUAL, 128, 0xFF);
 566         qglEnable(GL_CULL_FACE);
 567         qglEnable(GL_DEPTH_TEST);
 568         r_shadowstage = SHADOWSTAGE_LIGHT;
 569         c_rt_lights++;
 570 }
 571
 572 void R_Shadow_Stage_End(void)
 573 {
 574         rmeshstate_t m;
 575         // attempt to restore state to what Mesh_State thinks it is
 576         qglDisable(GL_BLEND);
 577         qglBlendFunc(GL_ONE, GL_ZERO);
 578         qglDepthMask(1);
 579         // now restore the rest of the state to normal
 580         GL_Color(1, 1, 1, 1);
 581         qglColorMask(1, 1, 1, 1);
 582         qglDisable(GL_SCISSOR_TEST);
 583         qglDepthFunc(GL_LEQUAL);
 584         qglDisable(GL_STENCIL_TEST);
 585         qglStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
 586         qglStencilFunc(GL_ALWAYS, 128, 0xFF);
 587         qglEnable(GL_CULL_FACE);
 588         qglEnable(GL_DEPTH_TEST);
 589         // force mesh state to reset by using various combinations of features
 590         memset(&m, 0, sizeof(m));
 591         m.blendfunc1 = GL_SRC_ALPHA;
 592         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
 593         R_Mesh_State(&m);
 594         m.blendfunc1 = GL_ONE;
 595         m.blendfunc2 = GL_ZERO;
 596         R_Mesh_State(&m);
 597         r_shadowstage = SHADOWSTAGE_NONE;
 598 }
 599
 600 int R_Shadow_ScissorForBBoxAndSphere(const float *mins, const float *maxs, const float *origin, float radius)
 601 {
 602         int i, ix1, iy1, ix2, iy2;
 603         float x1, y1, x2, y2, x, y;
 604         vec3_t smins, smaxs;
 605         vec4_t v, v2;
 606         if (!r_shadow_scissor.integer)
 607                 return false;
 608         // if view is inside the box, just say yes it's visible
 609         if (r_origin[0] >= mins[0] && r_origin[0] <= maxs[0]
 610          && r_origin[1] >= mins[1] && r_origin[1] <= maxs[1]
 611          && r_origin[2] >= mins[2] && r_origin[2] <= maxs[2])
 612         {
 613                 qglDisable(GL_SCISSOR_TEST);
 614                 return false;
 615         }
 616         VectorSubtract(r_origin, origin, v);
 617         if (DotProduct(v, v) < radius * radius)
 618         {
 619                 qglDisable(GL_SCISSOR_TEST);
 620                 return false;
 621         }
 622         // create viewspace bbox
 623         for (i = 0;i < 8;i++)
 624         {
 625                 v[0] = ((i & 1) ? mins[0] : maxs[0]) - r_origin[0];
 626                 v[1] = ((i & 2) ? mins[1] : maxs[1]) - r_origin[1];
 627                 v[2] = ((i & 4) ? mins[2] : maxs[2]) - r_origin[2];
 628                 v2[0] = DotProduct(v, vright);
 629                 v2[1] = DotProduct(v, vup);
 630                 v2[2] = DotProduct(v, vpn);
 631                 if (i)
 632                 {
 633                         if (smins[0] > v2[0]) smins[0] = v2[0];
 634                         if (smaxs[0] < v2[0]) smaxs[0] = v2[0];
 635                         if (smins[1] > v2[1]) smins[1] = v2[1];
 636                         if (smaxs[1] < v2[1]) smaxs[1] = v2[1];
 637                         if (smins[2] > v2[2]) smins[2] = v2[2];
 638                         if (smaxs[2] < v2[2]) smaxs[2] = v2[2];
 639                 }
 640                 else
 641                 {
 642                         smins[0] = smaxs[0] = v2[0];
 643                         smins[1] = smaxs[1] = v2[1];
 644                         smins[2] = smaxs[2] = v2[2];
 645                 }
 646         }
 647         // now we have a bbox in viewspace
 648         // clip it to the viewspace version of the sphere
 649         v[0] = origin[0] - r_origin[0];
 650         v[1] = origin[1] - r_origin[1];
 651         v[2] = origin[2] - r_origin[2];
 652         v2[0] = DotProduct(v, vright);
 653         v2[1] = DotProduct(v, vup);
 654         v2[2] = DotProduct(v, vpn);
 655         if (smins[0] < v2[0] - radius) smins[0] = v2[0] - radius;
 656         if (smaxs[0] < v2[0] - radius) smaxs[0] = v2[0] + radius;
 657         if (smins[1] < v2[1] - radius) smins[1] = v2[1] - radius;
 658         if (smaxs[1] < v2[1] - radius) smaxs[1] = v2[1] + radius;
 659         if (smins[2] < v2[2] - radius) smins[2] = v2[2] - radius;
 660         if (smaxs[2] < v2[2] - radius) smaxs[2] = v2[2] + radius;
 661         // clip it to the view plane
 662         if (smins[2] < 1)
 663                 smins[2] = 1;
 664         // return true if that culled the box
 665         if (smins[2] >= smaxs[2])
 666                 return true;
 667         // ok some of it is infront of the view, transform each corner back to
 668         // worldspace and then to screenspace and make screen rect
 669         // initialize these variables just to avoid compiler warnings
 670         x1 = y1 = x2 = y2 = 0;
 671         for (i = 0;i < 8;i++)
 672         {
 673                 v2[0] = (i & 1) ? smins[0] : smaxs[0];
 674                 v2[1] = (i & 2) ? smins[1] : smaxs[1];
 675                 v2[2] = (i & 4) ? smins[2] : smaxs[2];
 676                 v[0] = v2[0] * vright[0] + v2[1] * vup[0] + v2[2] * vpn[0] + r_origin[0];
 677                 v[1] = v2[0] * vright[1] + v2[1] * vup[1] + v2[2] * vpn[1] + r_origin[1];
 678                 v[2] = v2[0] * vright[2] + v2[1] * vup[2] + v2[2] * vpn[2] + r_origin[2];
 679                 v[3] = 1.0f;
 680                 GL_TransformToScreen(v, v2);
 681                 //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]);
 682                 x = v2[0];
 683                 y = v2[1];
 684                 if (i)
 685                 {
 686                         if (x1 > x) x1 = x;
 687                         if (x2 < x) x2 = x;
 688                         if (y1 > y) y1 = y;
 689                         if (y2 < y) y2 = y;
 690                 }
 691                 else
 692                 {
 693                         x1 = x2 = x;
 694                         y1 = y2 = y;
 695                 }
 696         }
 697         /*
 698         // this code doesn't handle boxes with any points behind view properly
 699         x1 = 1000;x2 = -1000;
 700         y1 = 1000;y2 = -1000;
 701         for (i = 0;i < 8;i++)
 702         {
 703                 v[0] = (i & 1) ? mins[0] : maxs[0];
 704                 v[1] = (i & 2) ? mins[1] : maxs[1];
 705                 v[2] = (i & 4) ? mins[2] : maxs[2];
 706                 v[3] = 1.0f;
 707                 GL_TransformToScreen(v, v2);
 708                 //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]);
 709                 if (v2[2] > 0)
 710                 {
 711                         x = v2[0];
 712                         y = v2[1];
 713
 714                         if (x1 > x) x1 = x;
 715                         if (x2 < x) x2 = x;
 716                         if (y1 > y) y1 = y;
 717                         if (y2 < y) y2 = y;
 718                 }
 719         }
 720         */
 721         ix1 = x1 - 1.0f;
 722         iy1 = y1 - 1.0f;
 723         ix2 = x2 + 1.0f;
 724         iy2 = y2 + 1.0f;
 725         //Con_Printf("%f %f %f %f\n", x1, y1, x2, y2);
 726         if (ix1 < r_refdef.x) ix1 = r_refdef.x;
 727         if (iy1 < r_refdef.y) iy1 = r_refdef.y;
 728         if (ix2 > r_refdef.x + r_refdef.width) ix2 = r_refdef.x + r_refdef.width;
 729         if (iy2 > r_refdef.y + r_refdef.height) iy2 = r_refdef.y + r_refdef.height;
 730         if (ix2 <= ix1 || iy2 <= iy1)
 731                 return true;
 732         // set up the scissor rectangle
 733         qglScissor(ix1, iy1, ix2 - ix1, iy2 - iy1);
 734         qglEnable(GL_SCISSOR_TEST);
 735         c_rt_scissored++;
 736         return false;
 737 }
 738
 739 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)
 740 {
 741         int i;
 742         float lightvec[3], iradius;
 743         iradius = 0.5f / lightradius;
 744         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out2d += 4, out1d += 4)
 745         {
 746                 VectorSubtract(vertex, relativelightorigin, lightvec);
 747                 out2d[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 748                 out2d[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 749                 out2d[2] = 0;
 750                 out1d[0] = 0.5f + DotProduct(normals, lightvec) * iradius;
 751                 out1d[1] = 0.5f;
 752                 out1d[2] = 0;
 753         }
 754 }
 755
 756 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)
 757 {
 758         int i;
 759         float lightvec[3], iradius;
 760         iradius = 0.5f / lightradius;
 761         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 762         {
 763                 VectorSubtract(vertex, relativelightorigin, lightvec);
 764                 out[0] = 0.5f + DotProduct(svectors, lightvec) * iradius;
 765                 out[1] = 0.5f + DotProduct(tvectors, lightvec) * iradius;
 766                 out[2] = 0.5f + DotProduct(normals, lightvec) * iradius;
 767         }
 768 }
 769
 770 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)
 771 {
 772         int i;
 773         float lightdir[3];
 774         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 775         {
 776                 VectorSubtract(vertex, relativelightorigin, lightdir);
 777                 // the cubemap normalizes this for us
 778                 out[0] = DotProduct(svectors, lightdir);
 779                 out[1] = DotProduct(tvectors, lightdir);
 780                 out[2] = DotProduct(normals, lightdir);
 781         }
 782 }
 783
 784 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)
 785 {
 786         int i;
 787         float lightdir[3], eyedir[3], halfdir[3], lightdirlen, iradius;
 788         iradius = 0.5f / lightradius;
 789         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 790         {
 791                 VectorSubtract(vertex, relativelightorigin, lightdir);
 792                 // this is used later to make the attenuation correct
 793                 lightdirlen = sqrt(DotProduct(lightdir, lightdir)) * iradius;
 794                 VectorNormalizeFast(lightdir);
 795                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 796                 VectorNormalizeFast(eyedir);
 797                 VectorAdd(lightdir, eyedir, halfdir);
 798                 VectorNormalizeFast(halfdir);
 799                 out[0] = 0.5f + DotProduct(svectors, halfdir) * lightdirlen;
 800                 out[1] = 0.5f + DotProduct(tvectors, halfdir) * lightdirlen;
 801                 out[2] = 0.5f + DotProduct(normals, halfdir) * lightdirlen;
 802         }
 803 }
 804
 805 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)
 806 {
 807         int i;
 808         float lightdir[3], eyedir[3], halfdir[3];
 809         for (i = 0;i < numverts;i++, vertex += 4, svectors += 4, tvectors += 4, normals += 4, out += 4)
 810         {
 811                 VectorSubtract(vertex, relativelightorigin, lightdir);
 812                 VectorNormalizeFast(lightdir);
 813                 VectorSubtract(vertex, relativeeyeorigin, eyedir);
 814                 VectorNormalizeFast(eyedir);
 815                 VectorAdd(lightdir, eyedir, halfdir);
 816                 // the cubemap normalizes this for us
 817                 out[0] = DotProduct(svectors, halfdir);
 818                 out[1] = DotProduct(tvectors, halfdir);
 819                 out[2] = DotProduct(normals, halfdir);
 820         }
 821 }
 822
 823 void R_Shadow_GenTexCoords_LightCubeMap(float *out, int numverts, const float *vertex, const vec3_t relativelightorigin)
 824 {
 825         int i;
 826         // FIXME: this needs to be written
 827         // this code assumes the vertices are in worldspace (a false assumption)
 828         for (i = 0;i < numverts;i++, vertex += 4, out += 4)
 829                 VectorSubtract(vertex, relativelightorigin, out);
 830 }
 831
 832 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)
 833 {
 834         int renders;
 835         float color[3];
 836         rmeshstate_t m;
 837         memset(&m, 0, sizeof(m));
 838         if (!bumptexture)
 839                 bumptexture = r_shadow_blankbumptexture;
 840         // colorscale accounts for how much we multiply the brightness during combine
 841         // mult is how many times the final pass of the lighting will be
 842         // performed to get more brightness than otherwise possible
 843         // limit mult to 64 for sanity sake
 844         if (r_textureunits.integer >= 4)
 845         {
 846                 // 4 texture no3D combine path, two pass
 847                 m.tex[0] = R_GetTexture(bumptexture);
 848                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 849                 m.texcombinergb[0] = GL_REPLACE;
 850                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 851                 m.tex[2] = R_GetTexture(r_shadow_attenuation2dtexture);
 852                 m.tex[3] = R_GetTexture(r_shadow_attenuation2dtexture);
 853                 R_Mesh_TextureState(&m);
 854                 qglColorMask(0,0,0,1);
 855                 qglDisable(GL_BLEND);
 856                 GL_Color(1,1,1,1);
 857                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 858                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 859                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[2], varray_texcoord[3], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 860                 R_Mesh_Draw(numverts, numtriangles, elements);
 861                 c_rt_lightmeshes++;
 862                 c_rt_lighttris += numtriangles;
 863
 864                 m.tex[0] = R_GetTexture(basetexture);
 865                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 866                 m.texcombinergb[0] = GL_MODULATE;
 867                 m.texcombinergb[1] = GL_MODULATE;
 868                 m.tex[2] = 0;
 869                 m.tex[3] = 0;
 870                 R_Mesh_TextureState(&m);
 871                 qglColorMask(1,1,1,0);
 872                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 873                 qglEnable(GL_BLEND);
 874                 if (lightcubemap)
 875                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 876
 877                 VectorScale(lightcolor, r_colorscale * r_shadow_lightintensityscale.value, color);
 878                 for (renders = 0;renders < 64 && (color[0] > 0 || color[1] > 0 || color[2] > 0);renders++, color[0] = max(0, color[0] - 1.0f), color[1] = max(0, color[1] - 1.0f), color[2] = max(0, color[2] - 1.0f))
 879                 {
 880                         GL_Color(color[0], color[1], color[2], 1);
 881                         R_Mesh_Draw(numverts, numtriangles, elements);
 882                         c_rt_lightmeshes++;
 883                         c_rt_lighttris += numtriangles;
 884                 }
 885         }
 886         else
 887         {
 888                 // 2 texture no3D combine path, three pass
 889                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
 890                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
 891                 R_Mesh_TextureState(&m);
 892                 qglColorMask(0,0,0,1);
 893                 qglDisable(GL_BLEND);
 894                 GL_Color(1,1,1,1);
 895                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 896                 R_Mesh_Draw(numverts, numtriangles, elements);
 897                 c_rt_lightmeshes++;
 898                 c_rt_lighttris += numtriangles;
 899
 900                 m.tex[0] = R_GetTexture(bumptexture);
 901                 m.tex[1] = 0;
 902                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 903                 m.texcombinergb[0] = GL_REPLACE;
 904                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 905                 R_Mesh_TextureState(&m);
 906                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
 907                 qglEnable(GL_BLEND);
 908                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 909                 R_Shadow_GenTexCoords_Diffuse_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin);
 910                 R_Mesh_Draw(numverts, numtriangles, elements);
 911                 c_rt_lightmeshes++;
 912                 c_rt_lighttris += numtriangles;
 913
 914                 m.tex[0] = R_GetTexture(basetexture);
 915                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 916                 m.texcombinergb[0] = GL_MODULATE;
 917                 m.texcombinergb[1] = GL_MODULATE;
 918                 R_Mesh_TextureState(&m);
 919                 qglColorMask(1,1,1,0);
 920                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 921                 if (lightcubemap)
 922                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
 923
 924                 VectorScale(lightcolor, r_colorscale * r_shadow_lightintensityscale.value, color);
 925                 for (renders = 0;renders < 64 && (color[0] > 0 || color[1] > 0 || color[2] > 0);renders++, color[0] = max(0, color[0] - 1.0f), color[1] = max(0, color[1] - 1.0f), color[2] = max(0, color[2] - 1.0f))
 926                 {
 927                         GL_Color(color[0], color[1], color[2], 1);
 928                         R_Mesh_Draw(numverts, numtriangles, elements);
 929                         c_rt_lightmeshes++;
 930                         c_rt_lighttris += numtriangles;
 931                 }
 932         }
 933 }
 934
 935 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)
 936 {
 937         int renders;
 938         float color[3];
 939         rmeshstate_t m;
 940         memset(&m, 0, sizeof(m));
 941         if (!bumptexture)
 942                 bumptexture = r_shadow_blankbumptexture;
 943         if (!glosstexture)
 944                 glosstexture = r_shadow_blankglosstexture;
 945         if (r_shadow_gloss.integer >= 2 || (r_shadow_gloss.integer >= 1 && glosstexture != r_shadow_blankglosstexture))
 946         {
 947                 // 2 texture no3D combine path, five pass
 948                 memset(&m, 0, sizeof(m));
 949
 950                 m.tex[0] = R_GetTexture(bumptexture);
 951                 m.texcubemap[1] = R_GetTexture(r_shadow_normalscubetexture);
 952                 m.texcombinergb[1] = GL_DOT3_RGBA_ARB;
 953                 R_Mesh_TextureState(&m);
 954                 qglColorMask(0,0,0,1);
 955                 qglDisable(GL_BLEND);
 956                 GL_Color(1,1,1,1);
 957                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 958                 R_Shadow_GenTexCoords_Specular_NormalCubeMap(varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, relativeeyeorigin);
 959                 R_Mesh_Draw(numverts, numtriangles, elements);
 960                 c_rt_lightmeshes++;
 961                 c_rt_lighttris += numtriangles;
 962
 963                 m.tex[0] = 0;
 964                 m.texcubemap[1] = 0;
 965                 m.texcombinergb[1] = GL_MODULATE;
 966                 R_Mesh_TextureState(&m);
 967                 // square alpha in framebuffer a few times to make it shiny
 968                 qglBlendFunc(GL_ZERO, GL_DST_ALPHA);
 969                 qglEnable(GL_BLEND);
 970                 // these comments are a test run through this math for intensity 0.5
 971                 // 0.5 * 0.5 = 0.25
 972                 R_Mesh_Draw(numverts, numtriangles, elements);
 973                 c_rt_lightmeshes++;
 974                 c_rt_lighttris += numtriangles;
 975                 // 0.25 * 0.25 = 0.0625
 976                 R_Mesh_Draw(numverts, numtriangles, elements);
 977                 c_rt_lightmeshes++;
 978                 c_rt_lighttris += numtriangles;
 979                 // 0.0625 * 0.0625 = 0.00390625
 980                 R_Mesh_Draw(numverts, numtriangles, elements);
 981                 c_rt_lightmeshes++;
 982                 c_rt_lighttris += numtriangles;
 983
 984                 m.tex[0] = R_GetTexture(r_shadow_attenuation2dtexture);
 985                 m.tex[1] = R_GetTexture(r_shadow_attenuation2dtexture);
 986                 R_Mesh_TextureState(&m);
 987                 qglBlendFunc(GL_DST_ALPHA, GL_ZERO);
 988                 R_Shadow_GenTexCoords_Attenuation2D1D(varray_texcoord[0], varray_texcoord[1], numverts, varray_vertex, svectors, tvectors, normals, relativelightorigin, lightradius);
 989                 R_Mesh_Draw(numverts, numtriangles, elements);
 990                 c_rt_lightmeshes++;
 991                 c_rt_lighttris += numtriangles;
 992
 993                 m.tex[0] = R_GetTexture(glosstexture);
 994                 m.texcubemap[1] = R_GetTexture(lightcubemap);
 995                 R_Mesh_TextureState(&m);
 996                 qglColorMask(1,1,1,0);
 997                 qglBlendFunc(GL_DST_ALPHA, GL_ONE);
 998                 memcpy(varray_texcoord[0], texcoords, numverts * sizeof(float[4]));
 999                 if (lightcubemap)
1000                         R_Shadow_GenTexCoords_LightCubeMap(varray_texcoord[1], numverts, varray_vertex, relativelightorigin);
1001
1002                 VectorScale(lightcolor, r_colorscale * r_shadow_lightintensityscale.value, color);
1003                 for (renders = 0;renders < 64 && (color[0] > 0 || color[1] > 0 || color[2] > 0);renders++, color[0] = max(0, color[0] - 1.0f), color[1] = max(0, color[1] - 1.0f), color[2] = max(0, color[2] - 1.0f))
1004                 {
1005                         GL_Color(color[0], color[1], color[2], 1);
1006                         R_Mesh_Draw(numverts, numtriangles, elements);
1007                         c_rt_lightmeshes++;
1008                         c_rt_lighttris += numtriangles;
1009                 }
1010         }
1011 }
1012
1013 void R_Shadow_DrawWorldLightShadowVolume(matrix4x4_t *matrix, worldlight_t *light)
1014 {
1015         R_Mesh_Matrix(matrix);
1016         R_Shadow_RenderShadowMeshVolume(light->shadowvolume);
1017 }
1018
1019 cvar_t r_editlights = {0, "r_editlights", "0"};
1020 cvar_t r_editlights_cursordistance = {0, "r_editlights_distance", "1024"};
1021 cvar_t r_editlights_cursorpushback = {0, "r_editlights_pushback", "0"};
1022 cvar_t r_editlights_cursorpushoff = {0, "r_editlights_pushoff", "4"};
1023 cvar_t r_editlights_cursorgrid = {0, "r_editlights_grid", "4"};
1024 cvar_t r_editlights_quakelightsizescale = {CVAR_SAVE, "r_editlights_quakelightsizescale", "0.8"};
1025 cvar_t r_editlights_rtlightssizescale = {CVAR_SAVE, "r_editlights_rtlightssizescale", "0.7"};
1026 cvar_t r_editlights_rtlightscolorscale = {CVAR_SAVE, "r_editlights_rtlightscolorscale", "2"};
1027 worldlight_t *r_shadow_worldlightchain;
1028 worldlight_t *r_shadow_selectedlight;
1029 vec3_t r_editlights_cursorlocation;
1030
1031 static int castshadowcount = 1;
1032 void R_Shadow_NewWorldLight(vec3_t origin, float radius, vec3_t color, int style, const char *cubemapname, int castshadow)
1033 {
1034         int i, j, k, l, maxverts, *mark, tris;
1035         float *verts, *v, f, temp[3], radius2;
1036         //float projectdistance, *v0, *v1, temp2[3], temp3[3];
1037         worldlight_t *e;
1038         shadowmesh_t *mesh, *castmesh;
1039         mleaf_t *leaf;
1040         msurface_t *surf;
1041         qbyte *pvs;
1042         surfmesh_t *surfmesh;
1043
1044         if (radius < 15 || DotProduct(color, color) < 0.03)
1045         {
1046                 Con_Printf("R_Shadow_NewWorldLight: refusing to create a light too small/dim\n");
1047                 return;
1048         }
1049
1050         e = Mem_Alloc(r_shadow_mempool, sizeof(worldlight_t));
1051         VectorCopy(origin, e->origin);
1052         VectorCopy(color, e->light);
1053         e->lightradius = radius;
1054         e->style = style;
1055         if (e->style < 0 || e->style >= MAX_LIGHTSTYLES)
1056         {
1057                 Con_Printf("R_Shadow_NewWorldLight: invalid light style number %i, must be >= 0 and < %i\n", e->style, MAX_LIGHTSTYLES);
1058                 e->style = 0;
1059         }
1060         e->castshadows = castshadow;
1061
1062         e->cullradius = e->lightradius;
1063         e->mins[0] = e->origin[0] - e->lightradius;
1064         e->maxs[0] = e->origin[0] + e->lightradius;
1065         e->mins[1] = e->origin[1] - e->lightradius;
1066         e->maxs[1] = e->origin[1] + e->lightradius;
1067         e->mins[2] = e->origin[2] - e->lightradius;
1068         e->maxs[2] = e->origin[2] + e->lightradius;
1069
1070         e->next = r_shadow_worldlightchain;
1071         r_shadow_worldlightchain = e;
1072         if (cubemapname && cubemapname[0])
1073         {
1074                 e->cubemapname = Mem_Alloc(r_shadow_mempool, strlen(cubemapname) + 1);
1075                 strcpy(e->cubemapname, cubemapname);
1076                 // FIXME: add cubemap loading (and don't load a cubemap twice)
1077         }
1078         if (cl.worldmodel)
1079         {
1080                 castshadowcount++;
1081                 if (r_shadow_portallight.integer)
1082                 {
1083                         qbyte *byteleafpvs;
1084                         qbyte *bytesurfacepvs;
1085                         byteleafpvs = Mem_Alloc(tempmempool, cl.worldmodel->numleafs + 1);
1086                         bytesurfacepvs = Mem_Alloc(tempmempool, cl.worldmodel->numsurfaces);
1087                         Portal_Visibility(cl.worldmodel, e->origin, byteleafpvs, bytesurfacepvs, NULL, 0, true, e->lightradius);
1088
1089                         for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1090                         {
1091                                 if (byteleafpvs[i+1])
1092                                 {
1093                                         temp[0] = bound(leaf->mins[0], e->origin[0], leaf->maxs[0]) - e->origin[0];
1094                                         temp[1] = bound(leaf->mins[1], e->origin[1], leaf->maxs[1]) - e->origin[1];
1095                                         temp[2] = bound(leaf->mins[2], e->origin[2], leaf->maxs[2]) - e->origin[2];
1096                                         if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1097                                                 leaf->worldnodeframe = castshadowcount;
1098                                 }
1099                         }
1100
1101                         for (i = 0, surf = cl.worldmodel->surfaces;i < cl.worldmodel->numsurfaces;i++, surf++)
1102                         {
1103                                 if (bytesurfacepvs[i])
1104                                 {
1105                                         f = DotProduct(e->origin, surf->plane->normal) - surf->plane->dist;
1106                                         if (surf->flags & SURF_PLANEBACK)
1107                                                 f = -f;
1108                                         if (f > 0 && f < e->lightradius)
1109                                         {
1110                                                 temp[0] = bound(surf->poly_mins[0], e->origin[0], surf->poly_maxs[0]) - e->origin[0];
1111                                                 temp[1] = bound(surf->poly_mins[1], e->origin[1], surf->poly_maxs[1]) - e->origin[1];
1112                                                 temp[2] = bound(surf->poly_mins[2], e->origin[2], surf->poly_maxs[2]) - e->origin[2];
1113                                                 if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1114                                                         surf->castshadow = castshadowcount;
1115                                         }
1116                                 }
1117                         }
1118
1119                         Mem_Free(byteleafpvs);
1120                         Mem_Free(bytesurfacepvs);
1121                 }
1122                 else
1123                 {
1124                         leaf = Mod_PointInLeaf(origin, cl.worldmodel);
1125                         pvs = Mod_LeafPVS(leaf, cl.worldmodel);
1126                         for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1127                         {
1128                                 if (pvs[i >> 3] & (1 << (i & 7)))
1129                                 {
1130                                         VectorCopy(origin, temp);
1131                                         if (temp[0] < leaf->mins[0]) temp[0] = leaf->mins[0];
1132                                         if (temp[0] > leaf->maxs[0]) temp[0] = leaf->maxs[0];
1133                                         if (temp[1] < leaf->mins[1]) temp[1] = leaf->mins[1];
1134                                         if (temp[1] > leaf->maxs[1]) temp[1] = leaf->maxs[1];
1135                                         if (temp[2] < leaf->mins[2]) temp[2] = leaf->mins[2];
1136                                         if (temp[2] > leaf->maxs[2]) temp[2] = leaf->maxs[2];
1137                                         VectorSubtract(temp, origin, temp);
1138                                         if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1139                                         {
1140                                                 leaf->worldnodeframe = castshadowcount;
1141                                                 for (j = 0, mark = leaf->firstmarksurface;j < leaf->nummarksurfaces;j++, mark++)
1142                                                 {
1143                                                         surf = cl.worldmodel->surfaces + *mark;
1144                                                         if (surf->castshadow != castshadowcount)
1145                                                         {
1146                                                                 f = DotProduct(e->origin, surf->plane->normal) - surf->plane->dist;
1147                                                                 if (surf->flags & SURF_PLANEBACK)
1148                                                                         f = -f;
1149                                                                 if (f > 0 && f < e->lightradius)
1150                                                                 {
1151                                                                         temp[0] = bound(surf->poly_mins[0], e->origin[0], surf->poly_maxs[0]) - e->origin[0];
1152                                                                         temp[1] = bound(surf->poly_mins[1], e->origin[1], surf->poly_maxs[1]) - e->origin[1];
1153                                                                         temp[2] = bound(surf->poly_mins[2], e->origin[2], surf->poly_maxs[2]) - e->origin[2];
1154                                                                         if (DotProduct(temp, temp) < e->lightradius * e->lightradius)
1155                                                                                 surf->castshadow = castshadowcount;
1156                                                                 }
1157                                                         }
1158                                                 }
1159                                         }
1160                                 }
1161                         }
1162                 }
1163
1164                 e->numleafs = 0;
1165                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1166                         if (leaf->worldnodeframe == castshadowcount)
1167                                 e->numleafs++;
1168                 e->numsurfaces = 0;
1169                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1170                         if (surf->castshadow == castshadowcount)
1171                                 e->numsurfaces++;
1172
1173                 if (e->numleafs)
1174                         e->leafs = Mem_Alloc(r_shadow_mempool, e->numleafs * sizeof(mleaf_t *));
1175                 if (e->numsurfaces)
1176                         e->surfaces = Mem_Alloc(r_shadow_mempool, e->numsurfaces * sizeof(msurface_t *));
1177                 e->numleafs = 0;
1178                 for (i = 0, leaf = cl.worldmodel->leafs + 1;i < cl.worldmodel->numleafs;i++, leaf++)
1179                         if (leaf->worldnodeframe == castshadowcount)
1180                                 e->leafs[e->numleafs++] = leaf;
1181                 e->numsurfaces = 0;
1182                 for (i = 0, surf = cl.worldmodel->surfaces + cl.worldmodel->firstmodelsurface;i < cl.worldmodel->nummodelsurfaces;i++, surf++)
1183                         if (surf->castshadow == castshadowcount)
1184                                 e->surfaces[e->numsurfaces++] = surf;
1185                 // find bounding box and sphere of lit surfaces
1186                 // (these will be used for creating a shape to clip the light)
1187                 radius2 = 0;
1188                 VectorCopy(e->origin, e->mins);
1189                 VectorCopy(e->origin, e->maxs);
1190                 for (j = 0;j < e->numsurfaces;j++)
1191                 {
1192                         surf = e->surfaces[j];
1193                         for (k = 0, v = surf->poly_verts;k < surf->poly_numverts;k++, v += 3)
1194                         {
1195                                 if (e->mins[0] > v[0]) e->mins[0] = v[0];if (e->maxs[0] < v[0]) e->maxs[0] = v[0];
1196                                 if (e->mins[1] > v[1]) e->mins[1] = v[1];if (e->maxs[1] < v[1]) e->maxs[1] = v[1];
1197                                 if (e->mins[2] > v[2]) e->mins[2] = v[2];if (e->maxs[2] < v[2]) e->maxs[2] = v[2];
1198                                 VectorSubtract(v, e->origin, temp);
1199                                 f = DotProduct(temp, temp);
1200                                 if (radius2 < f)
1201                                         radius2 = f;
1202                         }
1203                 }
1204                 e->cullradius = sqrt(radius2);
1205                 if (e->cullradius > e->lightradius)
1206                         e->cullradius = e->lightradius;
1207                 if (e->mins[0] < e->origin[0] - e->lightradius) e->mins[0] = e->origin[0] - e->lightradius;
1208                 if (e->maxs[0] > e->origin[0] + e->lightradius) e->maxs[0] = e->origin[0] + e->lightradius;
1209                 if (e->mins[1] < e->origin[1] - e->lightradius) e->mins[1] = e->origin[1] - e->lightradius;
1210                 if (e->maxs[1] > e->origin[1] + e->lightradius) e->maxs[1] = e->origin[1] + e->lightradius;
1211                 if (e->mins[2] < e->origin[2] - e->lightradius) e->mins[2] = e->origin[2] - e->lightradius;
1212                 if (e->maxs[2] > e->origin[2] + e->lightradius) e->maxs[2] = e->origin[2] + e->lightradius;
1213
1214                 if (e->castshadows)
1215                 {
1216                         maxverts = 256;
1217                         verts = NULL;
1218                         castshadowcount++;
1219                         for (j = 0;j < e->numsurfaces;j++)
1220                         {
1221                                 surf = e->surfaces[j];
1222                                 if (surf->flags & SURF_SHADOWCAST)
1223                                 {
1224                                         surf->castshadow = castshadowcount;
1225                                         if (maxverts < surf->poly_numverts)
1226                                                 maxverts = surf->poly_numverts;
1227                                 }
1228                         }
1229                         e->shadowvolume = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1230                         // make a mesh to cast a shadow volume from
1231                         castmesh = Mod_ShadowMesh_Begin(r_shadow_mempool, 32768);
1232                         for (j = 0;j < e->numsurfaces;j++)
1233                                 if (e->surfaces[j]->castshadow == castshadowcount)
1234                                         for (surfmesh = e->surfaces[j]->mesh;surfmesh;surfmesh = surfmesh->chain)
1235                                                 Mod_ShadowMesh_AddMesh(r_shadow_mempool, castmesh, surfmesh->numverts, surfmesh->verts, surfmesh->numtriangles, surfmesh->index);
1236                         castmesh = Mod_ShadowMesh_Finish(r_shadow_mempool, castmesh);
1237
1238                         // cast shadow volume from castmesh
1239                         for (mesh = castmesh;mesh;mesh = mesh->next)
1240                         {
1241                                 R_Shadow_ResizeTriangleFacingLight(castmesh->numtriangles);
1242                                 R_Shadow_ResizeShadowElements(castmesh->numtriangles);
1243
1244                                 if (maxverts < castmesh->numverts * 2)
1245                                 {
1246                                         maxverts = castmesh->numverts * 2;
1247                                         if (verts)
1248                                                 Mem_Free(verts);
1249                                         verts = NULL;
1250                                 }
1251                                 if (verts == NULL && maxverts > 0)
1252                                         verts = Mem_Alloc(r_shadow_mempool, maxverts * sizeof(float[4]));
1253
1254                                 // now that we have the buffers big enough, construct shadow volume mesh
1255                                 memcpy(verts, castmesh->verts, castmesh->numverts * sizeof(float[4]));
1256                                 R_Shadow_ProjectVertices(verts, castmesh->numverts, e->origin, 10000000.0f);//, e->lightradius);
1257                                 R_Shadow_MakeTriangleShadowFlags(castmesh->elements, verts, castmesh->numtriangles, trianglefacinglight, e->origin, e->lightradius);
1258                                 tris = R_Shadow_BuildShadowVolumeTriangles(castmesh->elements, castmesh->neighbors, castmesh->numtriangles, castmesh->numverts, trianglefacinglight, shadowelements);
1259                                 // add the constructed shadow volume mesh
1260                                 Mod_ShadowMesh_AddMesh(r_shadow_mempool, e->shadowvolume, castmesh->numverts, verts, tris, shadowelements);
1261                         }
1262                         // we're done with castmesh now
1263                         Mod_ShadowMesh_Free(castmesh);
1264                         e->shadowvolume = Mod_ShadowMesh_Finish(r_shadow_mempool, e->shadowvolume);
1265                         for (l = 0, mesh = e->shadowvolume;mesh;mesh = mesh->next)
1266                                 l += mesh->numtriangles;
1267                         Con_Printf("static shadow volume built containing %i triangles\n", l);
1268                 }
1269         }
1270         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);
1271 }
1272
1273 void R_Shadow_FreeWorldLight(worldlight_t *light)
1274 {
1275         worldlight_t **lightpointer;
1276         for (lightpointer = &r_shadow_worldlightchain;*lightpointer && *lightpointer != light;lightpointer = &(*lightpointer)->next);
1277         if (*lightpointer != light)
1278                 Sys_Error("R_Shadow_FreeWorldLight: light not linked into chain\n");
1279         *lightpointer = light->next;
1280         if (light->cubemapname)
1281                 Mem_Free(light->cubemapname);
1282         if (light->shadowvolume)
1283                 Mod_ShadowMesh_Free(light->shadowvolume);
1284         if (light->surfaces)
1285                 Mem_Free(light->surfaces);
1286         if (light->leafs)
1287                 Mem_Free(light->leafs);
1288         Mem_Free(light);
1289 }
1290
1291 void R_Shadow_ClearWorldLights(void)
1292 {
1293         while (r_shadow_worldlightchain)
1294                 R_Shadow_FreeWorldLight(r_shadow_worldlightchain);
1295         r_shadow_selectedlight = NULL;
1296 }
1297
1298 void R_Shadow_SelectLight(worldlight_t *light)
1299 {
1300         if (r_shadow_selectedlight)
1301                 r_shadow_selectedlight->selected = false;
1302         r_shadow_selectedlight = light;
1303         if (r_shadow_selectedlight)
1304                 r_shadow_selectedlight->selected = true;
1305 }
1306
1307
1308 void R_DrawLightSprite(int texnum, const vec3_t origin, vec_t scale, float cr, float cg, float cb, float ca)
1309 {
1310         rmeshstate_t m;
1311         float diff[3];
1312
1313         if (fogenabled)
1314         {
1315                 VectorSubtract(origin, r_origin, diff);
1316                 ca *= 1 - exp(fogdensity/DotProduct(diff,diff));
1317         }
1318
1319         memset(&m, 0, sizeof(m));
1320         m.blendfunc1 = GL_SRC_ALPHA;
1321         m.blendfunc2 = GL_ONE;
1322         m.tex[0] = texnum;
1323         R_Mesh_Matrix(&r_identitymatrix);
1324         R_Mesh_State(&m);
1325
1326         GL_Color(cr * r_colorscale, cg * r_colorscale, cb * r_colorscale, ca);
1327         varray_texcoord[0][ 0] = 0;varray_texcoord[0][ 1] = 0;
1328         varray_texcoord[0][ 4] = 0;varray_texcoord[0][ 5] = 1;
1329         varray_texcoord[0][ 8] = 1;varray_texcoord[0][ 9] = 1;
1330         varray_texcoord[0][12] = 1;varray_texcoord[0][13] = 0;
1331         varray_vertex[0] = origin[0] - vright[0] * scale - vup[0] * scale;
1332         varray_vertex[1] = origin[1] - vright[1] * scale - vup[1] * scale;
1333         varray_vertex[2] = origin[2] - vright[2] * scale - vup[2] * scale;
1334         varray_vertex[4] = origin[0] - vright[0] * scale + vup[0] * scale;
1335         varray_vertex[5] = origin[1] - vright[1] * scale + vup[1] * scale;
1336         varray_vertex[6] = origin[2] - vright[2] * scale + vup[2] * scale;
1337         varray_vertex[8] = origin[0] + vright[0] * scale + vup[0] * scale;
1338         varray_vertex[9] = origin[1] + vright[1] * scale + vup[1] * scale;
1339         varray_vertex[10] = origin[2] + vright[2] * scale + vup[2] * scale;
1340         varray_vertex[12] = origin[0] + vright[0] * scale - vup[0] * scale;
1341         varray_vertex[13] = origin[1] + vright[1] * scale - vup[1] * scale;
1342         varray_vertex[14] = origin[2] + vright[2] * scale - vup[2] * scale;
1343         R_Mesh_Draw(4, 2, polygonelements);
1344 }
1345
1346 void R_Shadow_DrawCursorCallback(const void *calldata1, int calldata2)
1347 {
1348         cachepic_t *pic;
1349         pic = Draw_CachePic("gfx/crosshair1.tga");
1350         if (pic)
1351                 R_DrawLightSprite(R_GetTexture(pic->tex), r_editlights_cursorlocation, r_editlights_cursorgrid.value * 0.5f, 1, 1, 1, 0.5);
1352 }
1353
1354 void R_Shadow_DrawLightSpriteCallback(const void *calldata1, int calldata2)
1355 {
1356         float intensity;
1357         const worldlight_t *light;
1358         light = calldata1;
1359         intensity = 0.5;
1360         if (light->selected)
1361                 intensity = 0.75 + 0.25 * sin(realtime * M_PI * 4.0);
1362         if (light->shadowvolume)
1363                 R_DrawLightSprite(calldata2, light->origin, 8, intensity, intensity, intensity, 0.5);
1364         else
1365                 R_DrawLightSprite(calldata2, light->origin, 8, intensity * 0.5, intensity * 0.5, intensity * 0.5, 0.5);
1366 }
1367
1368 void R_Shadow_DrawLightSprites(void)
1369 {
1370         int i, texnums[5];
1371         cachepic_t *pic;
1372         worldlight_t *light;
1373
1374         for (i = 0;i < 5;i++)
1375         {
1376                 pic = Draw_CachePic(va("gfx/crosshair%i.tga", i + 1));
1377                 if (pic)
1378                         texnums[i] = R_GetTexture(pic->tex);
1379                 else
1380                         texnums[i] = 0;
1381         }
1382
1383         for (light = r_shadow_worldlightchain;light;light = light->next)
1384                 R_MeshQueue_AddTransparent(light->origin, R_Shadow_DrawLightSpriteCallback, light, texnums[((int) light) % 5]);
1385         R_MeshQueue_AddTransparent(r_editlights_cursorlocation, R_Shadow_DrawCursorCallback, NULL, 0);
1386 }
1387
1388 void R_Shadow_SelectLightInView(void)
1389 {
1390         float bestrating, rating, temp[3];
1391         worldlight_t *best, *light;
1392         best = NULL;
1393         bestrating = 0;
1394         for (light = r_shadow_worldlightchain;light;light = light->next)
1395         {
1396                 VectorSubtract(light->origin, r_refdef.vieworg, temp);
1397                 rating = (DotProduct(temp, vpn) / sqrt(DotProduct(temp, temp)));
1398                 if (rating >= 0.95)
1399                 {
1400                         rating /= (1 + 0.0625f * sqrt(DotProduct(temp, temp)));
1401                         if (bestrating < rating && CL_TraceLine(light->origin, r_refdef.vieworg, NULL, NULL, 0, true, NULL) == 1.0f)
1402                         {
1403                                 bestrating = rating;
1404                                 best = light;
1405                         }
1406                 }
1407         }
1408         R_Shadow_SelectLight(best);
1409 }
1410
1411 void R_Shadow_LoadWorldLights(void)
1412 {
1413         int n, a, style, shadow;
1414         char name[MAX_QPATH], cubemapname[MAX_QPATH], *lightsstring, *s, *t;
1415         float origin[3], radius, color[3];
1416         if (cl.worldmodel == NULL)
1417         {
1418                 Con_Printf("No map loaded.\n");
1419                 return;
1420         }
1421         COM_StripExtension(cl.worldmodel->name, name);
1422         strcat(name, ".rtlights");
1423         lightsstring = COM_LoadFile(name, false);
1424         if (lightsstring)
1425         {
1426                 s = lightsstring;
1427                 n = 0;
1428                 while (*s)
1429                 {
1430                         t = s;
1431                         while (*s && *s != '\n')
1432                                 s++;
1433                         if (!*s)
1434                                 break;
1435                         *s = 0;
1436                         shadow = true;
1437                         // check for modifier flags
1438                         if (*t == '!')
1439                         {
1440                                 shadow = false;
1441                                 t++;
1442                         }
1443                         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);
1444                         if (a < 9)
1445                                 cubemapname[0] = 0;
1446                         *s = '\n';
1447                         if (a < 8)
1448                         {
1449                                 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);
1450                                 break;
1451                         }
1452                         VectorScale(color, r_editlights_rtlightscolorscale.value, color);
1453                         radius *= r_editlights_rtlightssizescale.value;
1454                         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname, shadow);
1455                         s++;
1456                         n++;
1457                 }
1458                 if (*s)
1459                         Con_Printf("invalid rtlights file \"%s\"\n", name);
1460                 Mem_Free(lightsstring);
1461         }
1462 }
1463
1464 void R_Shadow_SaveWorldLights(void)
1465 {
1466         worldlight_t *light;
1467         int bufchars, bufmaxchars;
1468         char *buf, *oldbuf;
1469         char name[MAX_QPATH];
1470         char line[1024];
1471         if (!r_shadow_worldlightchain)
1472                 return;
1473         if (cl.worldmodel == NULL)
1474         {
1475                 Con_Printf("No map loaded.\n");
1476                 return;
1477         }
1478         COM_StripExtension(cl.worldmodel->name, name);
1479         strcat(name, ".rtlights");
1480         bufchars = bufmaxchars = 0;
1481         buf = NULL;
1482         for (light = r_shadow_worldlightchain;light;light = light->next)
1483         {
1484                 sprintf(line, "%s%g %g %g %g %g %g %g %d %s\n", light->castshadows ? "" : "!", light->origin[0], light->origin[1], light->origin[2], light->lightradius / r_editlights_rtlightssizescale.value, light->light[0] / r_editlights_rtlightscolorscale.value, light->light[1] / r_editlights_rtlightscolorscale.value, light->light[2] / r_editlights_rtlightscolorscale.value, light->style, light->cubemapname ? light->cubemapname : "");
1485                 if (bufchars + strlen(line) > bufmaxchars)
1486                 {
1487                         bufmaxchars = bufchars + strlen(line) + 2048;
1488                         oldbuf = buf;
1489                         buf = Mem_Alloc(r_shadow_mempool, bufmaxchars);
1490                         if (oldbuf)
1491                         {
1492                                 if (bufchars)
1493                                         memcpy(buf, oldbuf, bufchars);
1494                                 Mem_Free(oldbuf);
1495                         }
1496                 }
1497                 if (strlen(line))
1498                 {
1499                         memcpy(buf + bufchars, line, strlen(line));
1500                         bufchars += strlen(line);
1501                 }
1502         }
1503         if (bufchars)
1504                 COM_WriteFile(name, buf, bufchars);
1505         if (buf)
1506                 Mem_Free(buf);
1507 }
1508
1509 void R_Shadow_LoadLightsFile(void)
1510 {
1511         int n, a, style;
1512         char name[MAX_QPATH], *lightsstring, *s, *t;
1513         float origin[3], radius, color[3], subtract, spotdir[3], spotcone, falloff, distbias;
1514         if (cl.worldmodel == NULL)
1515         {
1516                 Con_Printf("No map loaded.\n");
1517                 return;
1518         }
1519         COM_StripExtension(cl.worldmodel->name, name);
1520         strcat(name, ".lights");
1521         lightsstring = COM_LoadFile(name, false);
1522         if (lightsstring)
1523         {
1524                 s = lightsstring;
1525                 n = 0;
1526                 while (*s)
1527                 {
1528                         t = s;
1529                         while (*s && *s != '\n')
1530                                 s++;
1531                         if (!*s)
1532                                 break;
1533                         *s = 0;
1534                         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);
1535                         *s = '\n';
1536                         if (a < 14)
1537                         {
1538                                 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);
1539                                 break;
1540                         }
1541                         radius = sqrt(DotProduct(color, color) / (falloff * falloff * 8192.0f * 8192.0f));
1542                         radius = bound(15, radius, 4096);
1543                         VectorScale(color, (2.0f / (8388608.0f)), color);
1544                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL, true);
1545                         s++;
1546                         n++;
1547                 }
1548                 if (*s)
1549                         Con_Printf("invalid lights file \"%s\"\n", name);
1550                 Mem_Free(lightsstring);
1551         }
1552 }
1553
1554 void R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite(void)
1555 {
1556         int entnum, style, islight;
1557         char key[256], value[1024];
1558         float origin[3], radius, color[3], light, scale, originhack[3], overridecolor[3];
1559         const char *data;
1560
1561         if (cl.worldmodel == NULL)
1562         {
1563                 Con_Printf("No map loaded.\n");
1564                 return;
1565         }
1566         data = cl.worldmodel->entities;
1567         if (!data)
1568                 return;
1569         for (entnum = 0;COM_ParseToken(&data) && com_token[0] == '{';entnum++)
1570         {
1571                 light = 0;
1572                 origin[0] = origin[1] = origin[2] = 0;
1573                 originhack[0] = originhack[1] = originhack[2] = 0;
1574                 color[0] = color[1] = color[2] = 1;
1575                 overridecolor[0] = overridecolor[1] = overridecolor[2] = 1;
1576                 scale = 1;
1577                 style = 0;
1578                 islight = false;
1579                 while (1)
1580                 {
1581                         if (!COM_ParseToken(&data))
1582                                 break; // error
1583                         if (com_token[0] == '}')
1584                                 break; // end of entity
1585                         if (com_token[0] == '_')
1586                                 strcpy(key, com_token + 1);
1587                         else
1588                                 strcpy(key, com_token);
1589                         while (key[strlen(key)-1] == ' ') // remove trailing spaces
1590                                 key[strlen(key)-1] = 0;
1591                         if (!COM_ParseToken(&data))
1592                                 break; // error
1593                         strcpy(value, com_token);
1594
1595                         // now that we have the key pair worked out...
1596                         if (!strcmp("light", key))
1597                                 light = atof(value);
1598                         else if (!strcmp("origin", key))
1599                                 sscanf(value, "%f %f %f", &origin[0], &origin[1], &origin[2]);
1600                         else if (!strcmp("color", key))
1601                                 sscanf(value, "%f %f %f", &color[0], &color[1], &color[2]);
1602                         else if (!strcmp("wait", key))
1603                                 scale = atof(value);
1604                         else if (!strcmp("classname", key))
1605                         {
1606                                 if (!strncmp(value, "light", 5))
1607                                 {
1608                                         islight = true;
1609                                         if (!strcmp(value, "light_fluoro"))
1610                                         {
1611                                                 originhack[0] = 0;
1612                                                 originhack[1] = 0;
1613                                                 originhack[2] = 0;
1614                                                 overridecolor[0] = 1;
1615                                                 overridecolor[1] = 1;
1616                                                 overridecolor[2] = 1;
1617                                         }
1618                                         if (!strcmp(value, "light_fluorospark"))
1619                                         {
1620                                                 originhack[0] = 0;
1621                                                 originhack[1] = 0;
1622                                                 originhack[2] = 0;
1623                                                 overridecolor[0] = 1;
1624                                                 overridecolor[1] = 1;
1625                                                 overridecolor[2] = 1;
1626                                         }
1627                                         if (!strcmp(value, "light_globe"))
1628                                         {
1629                                                 originhack[0] = 0;
1630                                                 originhack[1] = 0;
1631                                                 originhack[2] = 0;
1632                                                 overridecolor[0] = 1;
1633                                                 overridecolor[1] = 0.8;
1634                                                 overridecolor[2] = 0.4;
1635                                         }
1636                                         if (!strcmp(value, "light_flame_large_yellow"))
1637                                         {
1638                                                 originhack[0] = 0;
1639                                                 originhack[1] = 0;
1640                                                 originhack[2] = 48;
1641                                                 overridecolor[0] = 1;
1642                                                 overridecolor[1] = 0.5;
1643                                                 overridecolor[2] = 0.1;
1644                                         }
1645                                         if (!strcmp(value, "light_flame_small_yellow"))
1646                                         {
1647                                                 originhack[0] = 0;
1648                                                 originhack[1] = 0;
1649                                                 originhack[2] = 40;
1650                                                 overridecolor[0] = 1;
1651                                                 overridecolor[1] = 0.5;
1652                                                 overridecolor[2] = 0.1;
1653                                         }
1654                                         if (!strcmp(value, "light_torch_small_white"))
1655                                         {
1656                                                 originhack[0] = 0;
1657                                                 originhack[1] = 0;
1658                                                 originhack[2] = 40;
1659                                                 overridecolor[0] = 1;
1660                                                 overridecolor[1] = 0.5;
1661                                                 overridecolor[2] = 0.1;
1662                                         }
1663                                         if (!strcmp(value, "light_torch_small_walltorch"))
1664                                         {
1665                                                 originhack[0] = 0;
1666                                                 originhack[1] = 0;
1667                                                 originhack[2] = 40;
1668                                                 overridecolor[0] = 1;
1669                                                 overridecolor[1] = 0.5;
1670                                                 overridecolor[2] = 0.1;
1671                                         }
1672                                 }
1673                         }
1674                         else if (!strcmp("style", key))
1675                                 style = atoi(value);
1676                 }
1677                 if (light <= 0 && islight)
1678                         light = 300;
1679                 radius = bound(15, light * r_editlights_quakelightsizescale.value / scale, 1048576);
1680                 light = sqrt(bound(0, light, 1048576)) * (1.0f / 16.0f);
1681                 if (color[0] == 1 && color[1] == 1 && color[2] == 1)
1682                         VectorCopy(overridecolor, color);
1683                 VectorScale(color, light, color);
1684                 VectorAdd(origin, originhack, origin);
1685                 if (radius >= 15)
1686                         R_Shadow_NewWorldLight(origin, radius, color, style, NULL, true);
1687         }
1688 }
1689
1690
1691 void R_Shadow_SetCursorLocationForView(void)
1692 {
1693         vec_t dist, push, frac;
1694         vec3_t dest, endpos, normal;
1695         VectorMA(r_refdef.vieworg, r_editlights_cursordistance.value, vpn, dest);
1696         frac = CL_TraceLine(r_refdef.vieworg, dest, endpos, normal, 0, true, NULL);
1697         if (frac < 1)
1698         {
1699                 dist = frac * r_editlights_cursordistance.value;
1700                 push = r_editlights_cursorpushback.value;
1701                 if (push > dist)
1702                         push = dist;
1703                 push = -push;
1704                 VectorMA(endpos, push, vpn, endpos);
1705                 VectorMA(endpos, r_editlights_cursorpushoff.value, normal, endpos);
1706         }
1707         r_editlights_cursorlocation[0] = floor(endpos[0] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1708         r_editlights_cursorlocation[1] = floor(endpos[1] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1709         r_editlights_cursorlocation[2] = floor(endpos[2] / r_editlights_cursorgrid.value + 0.5f) * r_editlights_cursorgrid.value;
1710 }
1711
1712 void R_Shadow_UpdateLightingMode(void)
1713 {
1714         r_shadow_lightingmode = 0;
1715         if (r_shadow_realtime.integer)
1716         {
1717                 if (r_shadow_worldlightchain)
1718                         r_shadow_lightingmode = 2;
1719                 else
1720                         r_shadow_lightingmode = 1;
1721         }
1722 }
1723
1724 void R_Shadow_UpdateWorldLightSelection(void)
1725 {
1726         R_Shadow_SetCursorLocationForView();
1727         if (r_editlights.integer)
1728         {
1729                 R_Shadow_SelectLightInView();
1730                 R_Shadow_DrawLightSprites();
1731         }
1732         else
1733                 R_Shadow_SelectLight(NULL);
1734 }
1735
1736 void R_Shadow_EditLights_Clear_f(void)
1737 {
1738         R_Shadow_ClearWorldLights();
1739 }
1740
1741 void R_Shadow_EditLights_Reload_f(void)
1742 {
1743         r_shadow_reloadlights = true;
1744 }
1745
1746 void R_Shadow_EditLights_Save_f(void)
1747 {
1748         if (cl.worldmodel)
1749                 R_Shadow_SaveWorldLights();
1750 }
1751
1752 void R_Shadow_EditLights_ImportLightEntitiesFromMap_f(void)
1753 {
1754         R_Shadow_ClearWorldLights();
1755         R_Shadow_LoadWorldLightsFromMap_LightArghliteTyrlite();
1756 }
1757
1758 void R_Shadow_EditLights_ImportLightsFile_f(void)
1759 {
1760         R_Shadow_ClearWorldLights();
1761         R_Shadow_LoadLightsFile();
1762 }
1763
1764 void R_Shadow_EditLights_Spawn_f(void)
1765 {
1766         vec3_t color;
1767         if (!r_editlights.integer)
1768         {
1769                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1770                 return;
1771         }
1772         if (Cmd_Argc() != 1)
1773         {
1774                 Con_Printf("r_editlights_spawn does not take parameters\n");
1775                 return;
1776         }
1777         color[0] = color[1] = color[2] = 1;
1778         R_Shadow_NewWorldLight(r_editlights_cursorlocation, 200, color, 0, NULL, true);
1779 }
1780
1781 void R_Shadow_EditLights_Edit_f(void)
1782 {
1783         vec3_t origin, color;
1784         vec_t radius;
1785         int style, shadows;
1786         char cubemapname[1024];
1787         if (!r_editlights.integer)
1788         {
1789                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1790                 return;
1791         }
1792         if (!r_shadow_selectedlight)
1793         {
1794                 Con_Printf("No selected light.\n");
1795                 return;
1796         }
1797         VectorCopy(r_shadow_selectedlight->origin, origin);
1798         radius = r_shadow_selectedlight->lightradius;
1799         VectorCopy(r_shadow_selectedlight->light, color);
1800         style = r_shadow_selectedlight->style;
1801         if (r_shadow_selectedlight->cubemapname)
1802                 strcpy(cubemapname, r_shadow_selectedlight->cubemapname);
1803         else
1804                 cubemapname[0] = 0;
1805         shadows = r_shadow_selectedlight->castshadows;
1806         if (!strcmp(Cmd_Argv(1), "origin"))
1807         {
1808                 if (Cmd_Argc() != 5)
1809                 {
1810                         Con_Printf("usage: r_editlights_edit %s x y z\n", Cmd_Argv(0));
1811                         return;
1812                 }
1813                 origin[0] = atof(Cmd_Argv(2));
1814                 origin[1] = atof(Cmd_Argv(3));
1815                 origin[2] = atof(Cmd_Argv(4));
1816         }
1817         else if (!strcmp(Cmd_Argv(1), "originx"))
1818         {
1819                 if (Cmd_Argc() != 3)
1820                 {
1821                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1822                         return;
1823                 }
1824                 origin[0] = atof(Cmd_Argv(2));
1825         }
1826         else if (!strcmp(Cmd_Argv(1), "originy"))
1827         {
1828                 if (Cmd_Argc() != 3)
1829                 {
1830                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1831                         return;
1832                 }
1833                 origin[1] = atof(Cmd_Argv(2));
1834         }
1835         else if (!strcmp(Cmd_Argv(1), "originz"))
1836         {
1837                 if (Cmd_Argc() != 3)
1838                 {
1839                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1840                         return;
1841                 }
1842                 origin[2] = atof(Cmd_Argv(2));
1843         }
1844         else if (!strcmp(Cmd_Argv(1), "move"))
1845         {
1846                 if (Cmd_Argc() != 5)
1847                 {
1848                         Con_Printf("usage: r_editlights_edit %s x y z\n", Cmd_Argv(0));
1849                         return;
1850                 }
1851                 origin[0] += atof(Cmd_Argv(2));
1852                 origin[1] += atof(Cmd_Argv(3));
1853                 origin[2] += atof(Cmd_Argv(4));
1854         }
1855         else if (!strcmp(Cmd_Argv(1), "movex"))
1856         {
1857                 if (Cmd_Argc() != 3)
1858                 {
1859                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1860                         return;
1861                 }
1862                 origin[0] += atof(Cmd_Argv(2));
1863         }
1864         else if (!strcmp(Cmd_Argv(1), "movey"))
1865         {
1866                 if (Cmd_Argc() != 3)
1867                 {
1868                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1869                         return;
1870                 }
1871                 origin[1] += atof(Cmd_Argv(2));
1872         }
1873         else if (!strcmp(Cmd_Argv(1), "movez"))
1874         {
1875                 if (Cmd_Argc() != 3)
1876                 {
1877                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1878                         return;
1879                 }
1880                 origin[2] += atof(Cmd_Argv(2));
1881         }
1882         else if (!strcmp(Cmd_Argv(1), "color"))
1883         {
1884                 if (Cmd_Argc() != 5)
1885                 {
1886                         Con_Printf("usage: r_editlights_edit %s red green blue\n", Cmd_Argv(0));
1887                         return;
1888                 }
1889                 color[0] = atof(Cmd_Argv(2));
1890                 color[1] = atof(Cmd_Argv(3));
1891                 color[2] = atof(Cmd_Argv(4));
1892         }
1893         else if (!strcmp(Cmd_Argv(1), "radius"))
1894         {
1895                 if (Cmd_Argc() != 3)
1896                 {
1897                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1898                         return;
1899                 }
1900                 radius = atof(Cmd_Argv(2));
1901         }
1902         else if (Cmd_Argc() == 3 && !strcmp(Cmd_Argv(1), "style"))
1903         {
1904                 if (Cmd_Argc() != 3)
1905                 {
1906                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1907                         return;
1908                 }
1909                 style = atoi(Cmd_Argv(2));
1910         }
1911         else if (Cmd_Argc() == 3 && !strcmp(Cmd_Argv(1), "cubemap"))
1912         {
1913                 if (Cmd_Argc() > 3)
1914                 {
1915                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1916                         return;
1917                 }
1918                 if (Cmd_Argc() == 3)
1919                         strcpy(cubemapname, Cmd_Argv(2));
1920                 else
1921                         cubemapname[0] = 0;
1922         }
1923         else if (Cmd_Argc() == 3 && !strcmp(Cmd_Argv(1), "shadows"))
1924         {
1925                 if (Cmd_Argc() != 3)
1926                 {
1927                         Con_Printf("usage: r_editlights_edit %s value\n", Cmd_Argv(0));
1928                         return;
1929                 }
1930                 shadows = Cmd_Argv(2)[0] == 'y' || Cmd_Argv(2)[0] == 'Y' || Cmd_Argv(2)[0] == 't' || atoi(Cmd_Argv(2));
1931         }
1932         else
1933         {
1934                 Con_Printf("usage: r_editlights_edit [property] [value]\n");
1935                 Con_Printf("Selected light's properties:\n");
1936                 Con_Printf("Origin: %f %f %f\n", r_shadow_selectedlight->origin[0], r_shadow_selectedlight->origin[1], r_shadow_selectedlight->origin[2]);
1937                 Con_Printf("Radius: %f\n", r_shadow_selectedlight->lightradius);
1938                 Con_Printf("Color: %f %f %f\n", r_shadow_selectedlight->light[0], r_shadow_selectedlight->light[1], r_shadow_selectedlight->light[2]);
1939                 Con_Printf("Style: %i\n", r_shadow_selectedlight->style);
1940                 Con_Printf("Cubemap: %s\n", r_shadow_selectedlight->cubemapname);
1941                 Con_Printf("Shadows: %s\n", r_shadow_selectedlight->castshadows ? "yes" : "no");
1942                 return;
1943         }
1944         R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1945         r_shadow_selectedlight = NULL;
1946         R_Shadow_NewWorldLight(origin, radius, color, style, cubemapname, shadows);
1947 }
1948
1949 extern int con_vislines;
1950 void R_Shadow_EditLights_DrawSelectedLightProperties(void)
1951 {
1952         float x, y;
1953         char temp[256];
1954         if (r_shadow_selectedlight == NULL)
1955                 return;
1956         x = 0;
1957         y = con_vislines;
1958         sprintf(temp, "Light properties");DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1959         sprintf(temp, "Origin %f %f %f", r_shadow_selectedlight->origin[0], r_shadow_selectedlight->origin[1], r_shadow_selectedlight->origin[2]);DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1960         sprintf(temp, "Radius %f", r_shadow_selectedlight->lightradius);DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1961         sprintf(temp, "Color %f %f %f", r_shadow_selectedlight->light[0], r_shadow_selectedlight->light[1], r_shadow_selectedlight->light[2]);DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1962         sprintf(temp, "Style %i", r_shadow_selectedlight->style);DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1963         sprintf(temp, "Cubemap %s", r_shadow_selectedlight->cubemapname);DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1964         sprintf(temp, "Shadows %s", r_shadow_selectedlight->castshadows ? "yes" : "no");DrawQ_String(x, y, temp, 0, 8, 8, 1, 1, 1, 1, 0);y += 8;
1965 }
1966
1967 void R_Shadow_EditLights_ToggleShadow_f(void)
1968 {
1969         if (!r_editlights.integer)
1970         {
1971                 Con_Printf("Cannot spawn light when not in editing mode.  Set r_editlights to 1.\n");
1972                 return;
1973         }
1974         if (!r_shadow_selectedlight)
1975         {
1976                 Con_Printf("No selected light.\n");
1977                 return;
1978         }
1979         R_Shadow_NewWorldLight(r_shadow_selectedlight->origin, r_shadow_selectedlight->lightradius, r_shadow_selectedlight->light, r_shadow_selectedlight->style, r_shadow_selectedlight->cubemapname, !r_shadow_selectedlight->castshadows);
1980         R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1981         r_shadow_selectedlight = NULL;
1982 }
1983
1984 void R_Shadow_EditLights_Remove_f(void)
1985 {
1986         if (!r_editlights.integer)
1987         {
1988                 Con_Printf("Cannot remove light when not in editing mode.  Set r_editlights to 1.\n");
1989                 return;
1990         }
1991         if (!r_shadow_selectedlight)
1992         {
1993                 Con_Printf("No selected light.\n");
1994                 return;
1995         }
1996         R_Shadow_FreeWorldLight(r_shadow_selectedlight);
1997         r_shadow_selectedlight = NULL;
1998 }
1999
2000 void R_Shadow_EditLights_Init(void)
2001 {
2002         Cvar_RegisterVariable(&r_editlights);
2003         Cvar_RegisterVariable(&r_editlights_cursordistance);
2004         Cvar_RegisterVariable(&r_editlights_cursorpushback);
2005         Cvar_RegisterVariable(&r_editlights_cursorpushoff);
2006         Cvar_RegisterVariable(&r_editlights_cursorgrid);
2007         Cvar_RegisterVariable(&r_editlights_quakelightsizescale);
2008         Cvar_RegisterVariable(&r_editlights_rtlightssizescale);
2009         Cvar_RegisterVariable(&r_editlights_rtlightscolorscale);
2010         Cmd_AddCommand("r_editlights_clear", R_Shadow_EditLights_Clear_f);
2011         Cmd_AddCommand("r_editlights_reload", R_Shadow_EditLights_Reload_f);
2012         Cmd_AddCommand("r_editlights_save", R_Shadow_EditLights_Save_f);
2013         Cmd_AddCommand("r_editlights_spawn", R_Shadow_EditLights_Spawn_f);
2014         Cmd_AddCommand("r_editlights_edit", R_Shadow_EditLights_Edit_f);
2015         Cmd_AddCommand("r_editlights_remove", R_Shadow_EditLights_Remove_f);
2016         Cmd_AddCommand("r_editlights_toggleshadow", R_Shadow_EditLights_ToggleShadow_f);
2017         Cmd_AddCommand("r_editlights_importlightentitiesfrommap", R_Shadow_EditLights_ImportLightEntitiesFromMap_f);
2018         Cmd_AddCommand("r_editlights_importlightsfile", R_Shadow_EditLights_ImportLightsFile_f);
2019 }