5 // FIXME: fix skybox after vid_restart
6 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1"};
7 qboolean skyavailable_quake;
8 qboolean skyavailable_box;
12 static rtexture_t *solidskytexture;
13 static rtexture_t *alphaskytexture;
14 static int skyrendersphere;
15 static int skyrenderbox;
16 static rtexturepool_t *skytexturepool;
17 static char skyname[256];
18 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
19 static rtexture_t *skyboxside[6];
21 void R_SkyStartFrame(void)
24 skyrendersphere = false;
26 skyrendermasked = false;
27 if (r_sky.integer && !fogenabled)
31 else if (skyavailable_quake)
32 skyrendersphere = true;
33 // for depth-masked sky, render the sky on the first sky surface encountered
35 skyrendermasked = true;
44 void R_UnloadSkyBox(void)
50 R_FreeTexture(skyboxside[i]);
51 skyboxside[i] = NULL;;
55 void R_LoadSkyBox(void)
65 if (snprintf(name, sizeof(name), "%s_%s", skyname, suf[i]) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
67 if (snprintf(name, sizeof(name), "%s%s", skyname, suf[i]) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
69 if (snprintf(name, sizeof(name), "env/%s%s", skyname, suf[i]) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
71 if (snprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suf[i]) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
73 Con_Printf("Couldn't load %s_%s or %s%s or env/%s%s or gfx/env/%s%s\n", skyname, suf[i], skyname, suf[i], skyname, suf[i], skyname, suf[i]);
79 skyboxside[i] = R_LoadTexture2D(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_CLAMP | TEXF_PRECACHE, NULL);
84 int R_SetSkyBox(const char *sky)
86 if (strcmp(sky, skyname) == 0) // no change
89 if (strlen(sky) > 1000)
91 Con_Printf("sky name too long (%i, max is 1000)\n", strlen(sky));
95 skyavailable_box = false;
104 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
106 skyavailable_box = true;
112 // LordHavoc: added LoadSky console command
113 void LoadSky_f (void)
119 Con_Printf("current sky: %s\n", skyname);
121 Con_Print("no skybox has been set\n");
124 if (R_SetSkyBox(Cmd_Argv(1)))
127 Con_Printf("skybox set to %s\n", skyname);
129 Con_Print("skybox disabled\n");
132 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
135 Con_Print("usage: loadsky skyname\n");
140 float skyboxvertex3f[6*4*3] =
174 float skyboxtexcoord2f[6*4*2] =
208 int skyboxelements[6*2*3] =
230 static void R_SkyBox(void)
234 GL_Color(1, 1, 1, 1);
235 memset(&m, 0, sizeof(m));
236 GL_BlendFunc(GL_ONE, GL_ZERO);
238 GL_DepthTest(false); // don't modify or read zbuffer
239 m.pointer_vertex = skyboxvertex3f;
240 m.pointer_texcoord[0] = skyboxtexcoord2f;
241 GL_LockArrays(0, 6*4);
242 for (i = 0;i < 6;i++)
244 m.tex[0] = R_GetTexture(skyboxside[i]);
246 R_Mesh_Draw(6*4, 2, skyboxelements + i * 6);
252 #define skygridx1 (skygridx + 1)
253 #define skygridxrecip (1.0f / (skygridx))
255 #define skygridy1 (skygridy + 1)
256 #define skygridyrecip (1.0f / (skygridy))
257 #define skysphere_numverts (skygridx1 * skygridy1)
258 #define skysphere_numtriangles (skygridx * skygridy * 2)
259 static float skysphere_vertex3f[skysphere_numverts * 3];
260 static float skysphere_texcoord2f[skysphere_numverts * 2];
261 static int skysphere_element3i[skysphere_numtriangles * 3];
263 static void skyspherecalc(void)
266 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
271 vertex3f = skysphere_vertex3f;
272 texcoord2f = skysphere_texcoord2f;
273 for (j = 0;j <= skygridy;j++)
275 a = j * skygridyrecip;
276 ax = cos(a * M_PI * 2);
277 ay = -sin(a * M_PI * 2);
278 for (i = 0;i <= skygridx;i++)
280 b = i * skygridxrecip;
281 x = cos((b + 0.5) * M_PI);
284 v[2] = -sin((b + 0.5) * M_PI) * dz;
285 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
286 *texcoord2f++ = v[0] * length;
287 *texcoord2f++ = v[1] * length;
293 e = skysphere_element3i;
294 for (j = 0;j < skygridy;j++)
296 for (i = 0;i < skygridx;i++)
298 *e++ = j * skygridx1 + i;
299 *e++ = j * skygridx1 + i + 1;
300 *e++ = (j + 1) * skygridx1 + i;
302 *e++ = j * skygridx1 + i + 1;
303 *e++ = (j + 1) * skygridx1 + i + 1;
304 *e++ = (j + 1) * skygridx1 + i;
309 static void R_SkySphere(void)
312 static qboolean skysphereinitialized = false;
314 matrix4x4_t scroll1matrix, scroll2matrix;
315 if (!skysphereinitialized)
317 skysphereinitialized = true;
321 // scroll speed for upper layer
322 speedscale = cl.time*8.0/128.0;
323 // wrap the scroll just to be extra kind to float accuracy
324 speedscale -= (int)speedscale;
326 // scroll the lower cloud layer twice as fast (just like quake did)
327 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
328 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale * 2, speedscale * 2, 0);
330 GL_Color(1, 1, 1, 1);
331 GL_BlendFunc(GL_ONE, GL_ZERO);
333 GL_DepthTest(false); // don't modify or read zbuffer
334 memset(&m, 0, sizeof(m));
335 m.pointer_vertex = skysphere_vertex3f;
336 m.tex[0] = R_GetTexture(solidskytexture);
337 m.pointer_texcoord[0] = skysphere_texcoord2f;
338 m.texmatrix[0] = scroll1matrix;
339 if (r_textureunits.integer >= 2)
341 // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
342 m.tex[1] = R_GetTexture(alphaskytexture);
343 m.texcombinergb[1] = gl_combine.integer ? GL_INTERPOLATE_ARB : GL_DECAL;
344 m.pointer_texcoord[1] = skysphere_texcoord2f;
345 m.texmatrix[1] = scroll2matrix;
347 GL_LockArrays(0, skysphere_numverts);
348 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
355 GL_LockArrays(0, skysphere_numverts);
356 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
359 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
360 m.tex[0] = R_GetTexture(alphaskytexture);
361 m.texmatrix[0] = scroll2matrix;
363 GL_LockArrays(0, skysphere_numverts);
364 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
371 matrix4x4_t skymatrix;
374 Matrix4x4_CreateTranslate(&skymatrix, r_vieworigin[0], r_vieworigin[1], r_vieworigin[2]);
375 R_Mesh_Matrix(&skymatrix);
378 // this does not modify depth buffer
381 else if (skyrenderbox)
383 // this does not modify depth buffer
386 /* this will be skyroom someday
389 // this modifies the depth buffer so we have to clear it afterward
391 // clear the depthbuffer that was used while rendering the skyroom
392 //GL_Clear(GL_DEPTH_BUFFER_BIT);
398 //===============================================================
404 A sky texture is 256*128, with the right side being a masked overlay
407 void R_InitSky (qbyte *src, int bytesperpixel)
410 unsigned solidpixels[128*128], alphapixels[128*128];
412 skyavailable_quake = true;
414 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
415 R_FreeTexturePool(&skytexturepool);
416 skytexturepool = R_AllocTexturePool();
417 solidskytexture = NULL;
418 alphaskytexture = NULL;
420 if (bytesperpixel == 4)
422 for (i = 0;i < 128;i++)
424 for (j = 0;j < 128;j++)
426 solidpixels[(i*128) + j] = ((unsigned *)src)[i*256+j+128];
427 alphapixels[(i*128) + j] = ((unsigned *)src)[i*256+j];
433 // make an average value for the back to avoid
434 // a fringe on the top level
443 for (i = 0;i < 128;i++)
445 for (j = 0;j < 128;j++)
447 rgba.i = palette_complete[src[i*256 + j + 128]];
453 rgba.b[0] = r/(128*128);
454 rgba.b[1] = g/(128*128);
455 rgba.b[2] = b/(128*128);
457 for (i = 0;i < 128;i++)
459 for (j = 0;j < 128;j++)
461 solidpixels[(i*128) + j] = palette_complete[src[i*256 + j + 128]];
462 alphapixels[(i*128) + j] = (p = src[i*256 + j]) ? palette_complete[p] : rgba.i;
467 solidskytexture = R_LoadTexture2D(skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) solidpixels, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
468 alphaskytexture = R_LoadTexture2D(skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) alphapixels, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
471 void R_ResetQuakeSky(void)
473 skyavailable_quake = false;
476 void R_ResetSkyBox(void)
478 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
480 skyavailable_box = false;
483 static void r_sky_start(void)
485 skytexturepool = R_AllocTexturePool();
486 solidskytexture = NULL;
487 alphaskytexture = NULL;
491 static void r_sky_shutdown(void)
494 R_FreeTexturePool(&skytexturepool);
495 solidskytexture = NULL;
496 alphaskytexture = NULL;
499 static void r_sky_newmap(void)
503 void R_Sky_Init(void)
505 Cmd_AddCommand ("loadsky", &LoadSky_f);
506 Cvar_RegisterVariable (&r_sky);
509 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);