5 cvar_t r_skyquality = {CVAR_SAVE, "r_skyquality", "2"};
6 cvar_t r_mergesky = {CVAR_SAVE, "r_mergesky", "0"};
7 cvar_t r_skyflush = {0, "r_skyflush", "0"};
9 static char skyworldname[1024];
10 rtexture_t *mergeskytexture;
11 rtexture_t *solidskytexture;
12 rtexture_t *alphaskytexture;
13 static qboolean skyavailable_quake;
14 static qboolean skyavailable_box;
15 static rtexturepool_t *skytexturepool;
21 static void R_BuildSky (int scrollupper, int scrolllower);
23 static void r_sky_start(void)
25 skytexturepool = R_AllocTexturePool();
26 mergeskytexture = NULL;
27 solidskytexture = NULL;
28 alphaskytexture = NULL;
31 static void r_sky_shutdown(void)
33 R_FreeTexturePool(&skytexturepool);
34 mergeskytexture = NULL;
35 solidskytexture = NULL;
36 alphaskytexture = NULL;
39 int R_SetSkyBox(char *sky);
41 static void r_sky_newmap(void)
43 skyavailable_quake = false;
44 if (!strcmp(skyworldname, cl.worldmodel->name))
45 skyavailable_quake = true;
50 Cmd_AddCommand ("loadsky", &LoadSky_f);
51 Cvar_RegisterVariable (&r_skyquality);
52 Cvar_RegisterVariable (&r_mergesky);
53 Cvar_RegisterVariable (&r_skyflush);
54 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);
57 static int skyrendersphere;
58 static int skyrenderbox;
60 void R_SkyStartFrame(void)
63 skyrendersphere = false;
65 skyrenderglquake = false;
66 skyrendermasked = false;
67 if (r_skyquality.integer >= 1 && !fogenabled)
71 else if (skyavailable_quake)
73 switch(r_skyquality.integer)
76 skyrenderglquake = true;
80 skyrendersphere = true;
84 if (r_mergesky.integer && (skyrenderglquake || skyrendersphere))
86 // R_BuildSky((int) (cl.time * 8.0), (int) (cl.time * 16.0));
87 // R_BuildSky((int) (cl.time * -8.0), 0);
88 R_BuildSky(0, (int) (cl.time * 8.0));
90 if (skyrenderbox || skyrendersphere)
92 // for depth-masked sky, render the sky on the first sky surface encountered
94 skyrendermasked = true;
99 static char skyname[256];
106 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
107 static rtexture_t *skyboxside[6];
108 int R_SetSkyBox(char *sky)
114 if (strcmp(sky, skyname) == 0) // no change
117 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
118 skyavailable_box = false;
124 if (strlen(sky) > 1000)
126 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
130 for (i = 0;i < 6;i++)
132 sprintf (name, "env/%s%s", sky, suf[i]);
133 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
135 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
136 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
138 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
142 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
143 Mem_Free(image_rgba);
146 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
148 skyavailable_box = true;
149 strcpy(skyname, sky);
155 // LordHavoc: added LoadSky console command
156 void LoadSky_f (void)
162 Con_Printf("current sky: %s\n", skyname);
164 Con_Printf("no skybox has been set\n");
167 if (R_SetSkyBox(Cmd_Argv(1)))
170 Con_Printf("skybox set to %s\n", skyname);
172 Con_Printf("skybox disabled\n");
175 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
178 Con_Printf("usage: loadsky skyname\n");
183 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
184 vert[i][0] = (x) * 1024.0f + r_origin[0];\
185 vert[i][1] = (y) * 1024.0f + r_origin[1];\
186 vert[i][2] = (z) * 1024.0f + r_origin[2];\
187 vert[i][4] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
188 vert[i][5] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
190 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
192 static void R_SkyBox(void)
196 memset(&m, 0, sizeof(m));
197 m.transparent = false;
198 m.blendfunc1 = GL_ONE;
199 m.blendfunc2 = GL_ZERO;
202 m.index = skyboxindex;
203 m.vertex = &vert[0][0];
204 m.vertexstep = sizeof(float[6]);
209 m.texcoords[0] = &vert[0][4];
210 m.texcoordstep[0] = sizeof(float[6]);
211 m.tex[0] = R_GetTexture(skyboxside[3]); // front
212 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
213 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
214 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
215 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
217 m.tex[0] = R_GetTexture(skyboxside[1]); // back
218 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
219 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
220 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
221 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
223 m.tex[0] = R_GetTexture(skyboxside[0]); // right
224 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
225 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
226 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
227 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
229 m.tex[0] = R_GetTexture(skyboxside[2]); // left
230 R_SkyBoxPolyVec(0, 1, 0, -1, -1, 1);
231 R_SkyBoxPolyVec(1, 1, 1, -1, -1, -1);
232 R_SkyBoxPolyVec(2, 0, 1, 1, -1, -1);
233 R_SkyBoxPolyVec(3, 0, 0, 1, -1, 1);
235 m.tex[0] = R_GetTexture(skyboxside[4]); // up
236 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
237 R_SkyBoxPolyVec(1, 1, 1, 1, 1, 1);
238 R_SkyBoxPolyVec(2, 0, 1, -1, 1, 1);
239 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
241 m.tex[0] = R_GetTexture(skyboxside[5]); // down
242 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
243 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
244 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
245 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
248 if (r_skyflush.integer)
250 // clear the zbuffer that was used while rendering the sky
251 glClear(GL_DEPTH_BUFFER_BIT);
252 if (r_skyflush.integer)
256 static float skysphere[33*33*5];
257 static int skysphereindices[32*32*6];
258 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
260 float a, b, x, ax, ay, v[3], length;
262 for (a = 0;a <= 1;a += (1.0 / 32.0))
264 ax = cos(a * M_PI * 2);
265 ay = -sin(a * M_PI * 2);
266 for (b = 0;b <= 1;b += (1.0 / 32.0))
268 x = cos(b * M_PI * 2);
271 v[2] = -sin(b * M_PI * 2) * dz;
272 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
273 *sphere++ = v[0] * length;
274 *sphere++ = v[1] * length;
280 index = skysphereindices;
281 for (j = 0;j < 32;j++)
283 for (i = 0;i < 32;i++)
285 *index++ = j * 33 + i;
286 *index++ = j * 33 + i + 1;
287 *index++ = (j + 1) * 33 + i;
289 *index++ = j * 33 + i + 1;
290 *index++ = (j + 1) * 33 + i + 1;
291 *index++ = (j + 1) * 33 + i;
297 static void skyspherearrays(float *vert, float *tex, float *tex2, float *source, float s, float s2)
299 float *v, *t, *t2, radius;
304 radius = r_farclip - 8;
305 for (i = 0;i < (33*33);i++)
307 *t++ = source[0] + s;
308 *t++ = source[1] + s;
309 *t2++ = source[0] + s2;
310 *t2++ = source[1] + s2;
311 *v++ = source[2] + r_origin[0];
312 *v++ = source[3] + r_origin[1];
313 *v++ = source[4] + r_origin[2];
319 static void R_SkySphere(void)
321 float speedscale, speedscale2;
322 float vert[33*33*4], tex[33*33*2], tex2[33*33*2];
323 static qboolean skysphereinitialized = false;
325 if (!skysphereinitialized)
327 skysphereinitialized = true;
328 skyspherecalc(skysphere, 1024, 1024, 1024 / 3);
330 memset(&m, 0, sizeof(m));
331 m.transparent = false;
332 m.blendfunc1 = GL_ONE;
333 m.blendfunc2 = GL_ZERO;
334 m.numtriangles = 32*32*2;
336 m.index = skysphereindices;
338 m.vertexstep = sizeof(float[4]);
343 m.texcoords[0] = tex;
344 m.texcoordstep[0] = sizeof(float[2]);
345 speedscale = cl.time*8.0/128.0;
346 speedscale -= (int)speedscale;
347 speedscale2 = cl.time*16.0/128.0;
348 speedscale2 -= (int)speedscale2;
349 skyspherearrays(vert, tex, tex2, skysphere, speedscale, speedscale2);
350 // do not lock the texcoord array, because it will be switched
351 if (r_mergesky.integer)
353 m.tex[0] = R_GetTexture(mergeskytexture);
358 m.tex[0] = R_GetTexture(solidskytexture);
361 m.blendfunc1 = GL_SRC_ALPHA;
362 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
363 m.tex[0] = R_GetTexture(alphaskytexture);
364 m.texcoords[0] = tex2;
368 if (r_skyflush.integer)
370 // clear the zbuffer that was used while rendering the sky
371 glClear(GL_DEPTH_BUFFER_BIT);
372 if (r_skyflush.integer)
380 else if (skyrenderbox)
384 //===============================================================
386 static byte skyupperlayerpixels[128*128*4];
387 static byte skylowerlayerpixels[128*128*4];
388 static byte skymergedpixels[128*128*4];
390 static void R_BuildSky (int scrollupper, int scrolllower)
392 int x, y, ux, uy, lx, ly;
395 for (y = 0;y < 128;y++)
397 uy = (y + scrollupper) & 127;
398 ly = (y + scrolllower) & 127;
399 for (x = 0;x < 128;x++)
401 ux = (x + scrollupper) & 127;
402 lx = (x + scrolllower) & 127;
403 u = &skyupperlayerpixels[(uy * 128 + ux) * 4];
404 l = &skylowerlayerpixels[(ly * 128 + lx) * 4];
408 *((int *)m) = *((int *)l);
411 m[0] = ((((int) l[0] - (int) u[0]) * (int) l[3]) >> 8) + (int) u[0];
412 m[1] = ((((int) l[1] - (int) u[1]) * (int) l[3]) >> 8) + (int) u[1];
413 m[2] = ((((int) l[2] - (int) u[2]) * (int) l[3]) >> 8) + (int) u[2];
418 *((int *)m) = *((int *)u);
423 R_UpdateTexture(mergeskytexture, skymergedpixels);
425 mergeskytexture = R_LoadTexture(skytexturepool, "mergedskytexture", 128, 128, skymergedpixels, TEXTYPE_RGBA, TEXF_ALWAYSPRECACHE);
432 A sky texture is 256*128, with the right side being a masked overlay
435 void R_InitSky (byte *src, int bytesperpixel)
438 unsigned trans[128*128];
443 strcpy(skyworldname, loadmodel->name);
444 if (bytesperpixel == 4)
446 for (i = 0;i < 128;i++)
447 for (j = 0;j < 128;j++)
448 trans[(i*128) + j] = src[i*256+j+128];
452 // make an average value for the back to avoid
453 // a fringe on the top level
455 for (i=0 ; i<128 ; i++)
457 for (j=0 ; j<128 ; j++)
459 p = src[i*256 + j + 128];
460 rgba = &d_8to24table[p];
461 trans[(i*128) + j] = *rgba;
462 r += ((byte *)rgba)[0];
463 g += ((byte *)rgba)[1];
464 b += ((byte *)rgba)[2];
468 ((byte *)&transpix)[0] = r/(128*128);
469 ((byte *)&transpix)[1] = g/(128*128);
470 ((byte *)&transpix)[2] = b/(128*128);
471 ((byte *)&transpix)[3] = 0;
474 memcpy(skyupperlayerpixels, trans, 128*128*4);
476 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
478 for (i = 0;i < 128*128;i++)
480 ((byte *)&trans[i])[0] >>= 1;
481 ((byte *)&trans[i])[1] >>= 1;
482 ((byte *)&trans[i])[2] >>= 1;
484 solidskytexture_half = R_LoadTexture (skytexturepool, "sky_solidtexture_half", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
487 if (bytesperpixel == 4)
489 for (i = 0;i < 128;i++)
490 for (j = 0;j < 128;j++)
491 trans[(i*128) + j] = src[i*256+j];
495 for (i=0 ; i<128 ; i++)
497 for (j=0 ; j<128 ; j++)
501 trans[(i*128) + j] = transpix;
503 trans[(i*128) + j] = d_8to24table[p];
508 memcpy(skylowerlayerpixels, trans, 128*128*4);
510 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
512 for (i = 0;i < 128*128;i++)
514 ((byte *)&trans[i])[0] >>= 1;
515 ((byte *)&trans[i])[1] >>= 1;
516 ((byte *)&trans[i])[2] >>= 1;
518 alphaskytexture_half = R_LoadTexture (skytexturepool, "sky_alphatexture_half", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);