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];
19 typedef struct suffixinfo_s
22 qboolean flipx, flipy, flipdiagonal;
25 static suffixinfo_t suffix[3][6] =
28 {"px", false, false, false},
29 {"nx", false, false, false},
30 {"py", false, false, false},
31 {"ny", false, false, false},
32 {"pz", false, false, false},
33 {"nz", false, false, false}
36 {"posx", false, false, false},
37 {"negx", false, false, false},
38 {"posy", false, false, false},
39 {"negy", false, false, false},
40 {"posz", false, false, false},
41 {"negz", false, false, false}
44 {"rt", true, false, true},
45 {"lf", false, true, true},
46 {"ft", true, true, false},
47 {"bk", false, false, false},
48 {"up", true, false, true},
49 {"dn", true, false, true}
53 static rtexture_t *skyboxside[6];
55 void R_SkyStartFrame(void)
58 skyrendersphere = false;
60 skyrendermasked = false;
61 if (r_sky.integer && !fogenabled)
65 else if (skyavailable_quake)
66 skyrendersphere = true;
67 // for depth-masked sky, render the sky on the first sky surface encountered
69 skyrendermasked = true;
78 void R_UnloadSkyBox(void)
84 R_FreeTexture(skyboxside[i]);
89 void R_LoadSkyBox(void)
92 int indices[4] = {0,1,2,3};
104 if (snprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
106 if (snprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
108 if (snprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
110 if (snprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) >= (int)sizeof(name) || !(image_rgba = loadimagepixels(name, false, 0, 0)))
115 temp = Mem_Alloc(tempmempool, image_width*image_height*4);
116 Image_CopyMux (temp, image_rgba, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
117 skyboxside[i] = R_LoadTexture2D(skytexturepool, va("skyboxside%d", i), image_width, image_height, temp, TEXTYPE_RGBA, TEXF_CLAMP | TEXF_PRECACHE, NULL);
118 Mem_Free(image_rgba);
124 if (skyboxside[i] == NULL)
131 if (skyboxside[0] != NULL)
135 Con_Printf ("Failed to load %s as skybox\n", skyname);
138 int R_SetSkyBox(const char *sky)
140 if (strcmp(sky, skyname) == 0) // no change
143 if (strlen(sky) > 1000)
145 Con_Printf("sky name too long (%i, max is 1000)\n", strlen(sky));
149 skyavailable_box = false;
150 strcpy(skyname, sky);
158 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
160 skyavailable_box = true;
166 // LordHavoc: added LoadSky console command
167 void LoadSky_f (void)
173 Con_Printf("current sky: %s\n", skyname);
175 Con_Print("no skybox has been set\n");
178 if (R_SetSkyBox(Cmd_Argv(1)))
181 Con_Printf("skybox set to %s\n", skyname);
183 Con_Print("skybox disabled\n");
186 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
189 Con_Print("usage: loadsky skyname\n");
194 float skyboxvertex3f[6*4*3] =
228 float skyboxtexcoord2f[6*4*2] =
262 int skyboxelements[6*2*3] =
284 static void R_SkyBox(void)
288 GL_Color(1, 1, 1, 1);
289 memset(&m, 0, sizeof(m));
290 GL_BlendFunc(GL_ONE, GL_ZERO);
292 GL_DepthTest(false); // don't modify or read zbuffer
293 m.pointer_vertex = skyboxvertex3f;
294 m.pointer_texcoord[0] = skyboxtexcoord2f;
295 GL_LockArrays(0, 6*4);
296 for (i = 0;i < 6;i++)
298 m.tex[0] = R_GetTexture(skyboxside[i]);
300 R_Mesh_Draw(6*4, 2, skyboxelements + i * 6);
306 #define skygridx1 (skygridx + 1)
307 #define skygridxrecip (1.0f / (skygridx))
309 #define skygridy1 (skygridy + 1)
310 #define skygridyrecip (1.0f / (skygridy))
311 #define skysphere_numverts (skygridx1 * skygridy1)
312 #define skysphere_numtriangles (skygridx * skygridy * 2)
313 static float skysphere_vertex3f[skysphere_numverts * 3];
314 static float skysphere_texcoord2f[skysphere_numverts * 2];
315 static int skysphere_element3i[skysphere_numtriangles * 3];
317 static void skyspherecalc(void)
320 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
325 vertex3f = skysphere_vertex3f;
326 texcoord2f = skysphere_texcoord2f;
327 for (j = 0;j <= skygridy;j++)
329 a = j * skygridyrecip;
330 ax = cos(a * M_PI * 2);
331 ay = -sin(a * M_PI * 2);
332 for (i = 0;i <= skygridx;i++)
334 b = i * skygridxrecip;
335 x = cos((b + 0.5) * M_PI);
338 v[2] = -sin((b + 0.5) * M_PI) * dz;
339 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
340 *texcoord2f++ = v[0] * length;
341 *texcoord2f++ = v[1] * length;
347 e = skysphere_element3i;
348 for (j = 0;j < skygridy;j++)
350 for (i = 0;i < skygridx;i++)
352 *e++ = j * skygridx1 + i;
353 *e++ = j * skygridx1 + i + 1;
354 *e++ = (j + 1) * skygridx1 + i;
356 *e++ = j * skygridx1 + i + 1;
357 *e++ = (j + 1) * skygridx1 + i + 1;
358 *e++ = (j + 1) * skygridx1 + i;
363 static void R_SkySphere(void)
366 static qboolean skysphereinitialized = false;
368 matrix4x4_t scroll1matrix, scroll2matrix;
369 if (!skysphereinitialized)
371 skysphereinitialized = true;
375 // scroll speed for upper layer
376 speedscale = cl.time*8.0/128.0;
377 // wrap the scroll just to be extra kind to float accuracy
378 speedscale -= (int)speedscale;
380 // scroll the lower cloud layer twice as fast (just like quake did)
381 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
382 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale * 2, speedscale * 2, 0);
384 GL_Color(1, 1, 1, 1);
385 GL_BlendFunc(GL_ONE, GL_ZERO);
387 GL_DepthTest(false); // don't modify or read zbuffer
388 memset(&m, 0, sizeof(m));
389 m.pointer_vertex = skysphere_vertex3f;
390 m.tex[0] = R_GetTexture(solidskytexture);
391 m.pointer_texcoord[0] = skysphere_texcoord2f;
392 m.texmatrix[0] = scroll1matrix;
393 if (r_textureunits.integer >= 2)
395 // one pass using GL_DECAL or GL_INTERPOLATE_ARB for alpha layer
396 m.tex[1] = R_GetTexture(alphaskytexture);
397 m.texcombinergb[1] = gl_combine.integer ? GL_INTERPOLATE_ARB : GL_DECAL;
398 m.pointer_texcoord[1] = skysphere_texcoord2f;
399 m.texmatrix[1] = scroll2matrix;
401 GL_LockArrays(0, skysphere_numverts);
402 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
409 GL_LockArrays(0, skysphere_numverts);
410 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
413 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
414 m.tex[0] = R_GetTexture(alphaskytexture);
415 m.texmatrix[0] = scroll2matrix;
417 GL_LockArrays(0, skysphere_numverts);
418 R_Mesh_Draw(skysphere_numverts, skysphere_numtriangles, skysphere_element3i);
425 matrix4x4_t skymatrix;
428 Matrix4x4_CreateTranslate(&skymatrix, r_vieworigin[0], r_vieworigin[1], r_vieworigin[2]);
429 R_Mesh_Matrix(&skymatrix);
432 // this does not modify depth buffer
435 else if (skyrenderbox)
437 // this does not modify depth buffer
440 /* this will be skyroom someday
443 // this modifies the depth buffer so we have to clear it afterward
445 // clear the depthbuffer that was used while rendering the skyroom
446 //GL_Clear(GL_DEPTH_BUFFER_BIT);
452 //===============================================================
458 A sky texture is 256*128, with the right side being a masked overlay
461 void R_InitSky (qbyte *src, int bytesperpixel)
464 unsigned solidpixels[128*128], alphapixels[128*128];
466 skyavailable_quake = true;
468 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
469 R_FreeTexturePool(&skytexturepool);
470 skytexturepool = R_AllocTexturePool();
471 solidskytexture = NULL;
472 alphaskytexture = NULL;
474 if (bytesperpixel == 4)
476 for (i = 0;i < 128;i++)
478 for (j = 0;j < 128;j++)
480 solidpixels[(i*128) + j] = ((unsigned *)src)[i*256+j+128];
481 alphapixels[(i*128) + j] = ((unsigned *)src)[i*256+j];
487 // make an average value for the back to avoid
488 // a fringe on the top level
497 for (i = 0;i < 128;i++)
499 for (j = 0;j < 128;j++)
501 rgba.i = palette_complete[src[i*256 + j + 128]];
507 rgba.b[0] = r/(128*128);
508 rgba.b[1] = g/(128*128);
509 rgba.b[2] = b/(128*128);
511 for (i = 0;i < 128;i++)
513 for (j = 0;j < 128;j++)
515 solidpixels[(i*128) + j] = palette_complete[src[i*256 + j + 128]];
516 alphapixels[(i*128) + j] = (p = src[i*256 + j]) ? palette_complete[p] : rgba.i;
521 solidskytexture = R_LoadTexture2D(skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) solidpixels, TEXTYPE_RGBA, TEXF_PRECACHE, NULL);
522 alphaskytexture = R_LoadTexture2D(skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) alphapixels, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
525 void R_ResetQuakeSky(void)
527 skyavailable_quake = false;
530 void R_ResetSkyBox(void)
532 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
534 skyavailable_box = false;
537 static void r_sky_start(void)
539 skytexturepool = R_AllocTexturePool();
540 solidskytexture = NULL;
541 alphaskytexture = NULL;
545 static void r_sky_shutdown(void)
548 R_FreeTexturePool(&skytexturepool);
549 solidskytexture = NULL;
550 alphaskytexture = NULL;
553 static void r_sky_newmap(void)
557 void R_Sky_Init(void)
559 Cmd_AddCommand ("loadsky", &LoadSky_f);
560 Cvar_RegisterVariable (&r_sky);
563 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);