5 cvar_t r_skyquality = {CVAR_SAVE, "r_skyquality", "2"};
6 cvar_t r_skyflush = {0, "r_skyflush", "0"};
8 static char skyworldname[1024];
9 rtexture_t *mergeskytexture;
10 rtexture_t *solidskytexture;
11 rtexture_t *alphaskytexture;
12 static qboolean skyavailable_quake;
13 static qboolean skyavailable_box;
14 static rtexturepool_t *skytexturepool;
20 static void R_BuildSky (int scrollupper, int scrolllower);
22 static void r_sky_start(void)
24 skytexturepool = R_AllocTexturePool();
25 mergeskytexture = NULL;
26 solidskytexture = NULL;
27 alphaskytexture = NULL;
30 static void r_sky_shutdown(void)
32 R_FreeTexturePool(&skytexturepool);
33 mergeskytexture = NULL;
34 solidskytexture = NULL;
35 alphaskytexture = NULL;
38 int R_SetSkyBox(char *sky);
40 static void r_sky_newmap(void)
42 skyavailable_quake = false;
43 if (!strcmp(skyworldname, cl.worldmodel->name))
44 skyavailable_quake = true;
49 Cmd_AddCommand ("loadsky", &LoadSky_f);
50 Cvar_RegisterVariable (&r_skyquality);
51 Cvar_RegisterVariable (&r_skyflush);
52 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);
55 static int skyrendersphere;
56 static int skyrenderbox;
58 void R_SkyStartFrame(void)
61 skyrendersphere = false;
63 skyrenderglquake = false;
64 skyrendermasked = false;
65 if (r_skyquality.integer >= 1 && !fogenabled)
69 else if (skyavailable_quake)
71 switch(r_skyquality.integer)
74 skyrenderglquake = true;
78 skyrendersphere = true;
82 if (skyrenderbox || skyrendersphere)
84 // for depth-masked sky, render the sky on the first sky surface encountered
86 skyrendermasked = true;
91 static char skyname[256];
98 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
99 static rtexture_t *skyboxside[6];
100 int R_SetSkyBox(char *sky)
106 if (strcmp(sky, skyname) == 0) // no change
109 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
110 skyavailable_box = false;
116 if (strlen(sky) > 1000)
118 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
122 for (i = 0;i < 6;i++)
124 sprintf (name, "env/%s%s", sky, suf[i]);
125 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
127 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
128 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
130 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
134 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
135 Mem_Free(image_rgba);
138 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
140 skyavailable_box = true;
141 strcpy(skyname, sky);
147 // LordHavoc: added LoadSky console command
148 void LoadSky_f (void)
154 Con_Printf("current sky: %s\n", skyname);
156 Con_Printf("no skybox has been set\n");
159 if (R_SetSkyBox(Cmd_Argv(1)))
162 Con_Printf("skybox set to %s\n", skyname);
164 Con_Printf("skybox disabled\n");
167 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
170 Con_Printf("usage: loadsky skyname\n");
175 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
176 vert[i][0] = (x) * 1024.0f + r_origin[0];\
177 vert[i][1] = (y) * 1024.0f + r_origin[1];\
178 vert[i][2] = (z) * 1024.0f + r_origin[2];\
179 st[i][0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
180 st[i][1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
182 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
184 static void R_SkyBox(void)
186 float vert[4][4], st[4][2];
188 memset(&m, 0, sizeof(m));
189 m.transparent = false;
190 m.blendfunc1 = GL_ONE;
191 m.blendfunc2 = GL_ZERO;
194 m.index = skyboxindex;
195 m.vertex = &vert[0][0];
196 m.vertexstep = sizeof(float[4]);
201 m.texcoords[0] = &st[0][0];
202 m.texcoordstep[0] = sizeof(float[2]);
203 m.tex[0] = R_GetTexture(skyboxside[3]); // front
204 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
205 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
206 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
207 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
209 m.tex[0] = R_GetTexture(skyboxside[1]); // back
210 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
211 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
212 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
213 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
215 m.tex[0] = R_GetTexture(skyboxside[0]); // right
216 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
217 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
218 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
219 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
221 m.tex[0] = R_GetTexture(skyboxside[2]); // left
222 R_SkyBoxPolyVec(0, 1, 0, -1, -1, 1);
223 R_SkyBoxPolyVec(1, 1, 1, -1, -1, -1);
224 R_SkyBoxPolyVec(2, 0, 1, 1, -1, -1);
225 R_SkyBoxPolyVec(3, 0, 0, 1, -1, 1);
227 m.tex[0] = R_GetTexture(skyboxside[4]); // up
228 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
229 R_SkyBoxPolyVec(1, 1, 1, 1, 1, 1);
230 R_SkyBoxPolyVec(2, 0, 1, -1, 1, 1);
231 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
233 m.tex[0] = R_GetTexture(skyboxside[5]); // down
234 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
235 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
236 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
237 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
240 if (r_skyflush.integer)
242 // clear the zbuffer that was used while rendering the sky
243 glClear(GL_DEPTH_BUFFER_BIT);
244 if (r_skyflush.integer)
248 static float skysphere[33*33*5];
249 static int skysphereindices[32*32*6];
250 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
252 float a, b, x, ax, ay, v[3], length;
254 for (a = 0;a <= 1;a += (1.0 / 32.0))
256 ax = cos(a * M_PI * 2);
257 ay = -sin(a * M_PI * 2);
258 for (b = 0;b <= 1;b += (1.0 / 32.0))
260 x = cos(b * M_PI * 2);
263 v[2] = -sin(b * M_PI * 2) * dz;
264 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
265 *sphere++ = v[0] * length;
266 *sphere++ = v[1] * length;
272 index = skysphereindices;
273 for (j = 0;j < 32;j++)
275 for (i = 0;i < 32;i++)
277 *index++ = j * 33 + i;
278 *index++ = j * 33 + i + 1;
279 *index++ = (j + 1) * 33 + i;
281 *index++ = j * 33 + i + 1;
282 *index++ = (j + 1) * 33 + i + 1;
283 *index++ = (j + 1) * 33 + i;
289 static void skyspherearrays(float *vert, float *tex, float *tex2, float *source, float s, float s2)
291 float *v, *t, *t2, radius;
296 radius = r_farclip - 8;
297 for (i = 0;i < (33*33);i++)
299 *t++ = source[0] + s;
300 *t++ = source[1] + s;
301 *t2++ = source[0] + s2;
302 *t2++ = source[1] + s2;
303 *v++ = source[2] + r_origin[0];
304 *v++ = source[3] + r_origin[1];
305 *v++ = source[4] + r_origin[2];
311 static void R_SkySphere(void)
313 float speedscale, speedscale2;
314 float vert[33*33*4], tex[33*33*2], tex2[33*33*2];
315 static qboolean skysphereinitialized = false;
317 if (!skysphereinitialized)
319 skysphereinitialized = true;
320 skyspherecalc(skysphere, 1024, 1024, 1024 / 3);
322 memset(&m, 0, sizeof(m));
323 m.transparent = false;
324 m.blendfunc1 = GL_ONE;
325 m.blendfunc2 = GL_ZERO;
326 m.numtriangles = 32*32*2;
328 m.index = skysphereindices;
330 m.vertexstep = sizeof(float[4]);
335 m.texcoords[0] = tex;
336 m.texcoordstep[0] = sizeof(float[2]);
337 speedscale = cl.time*8.0/128.0;
338 speedscale -= (int)speedscale;
339 speedscale2 = cl.time*16.0/128.0;
340 speedscale2 -= (int)speedscale2;
341 skyspherearrays(vert, tex, tex2, skysphere, speedscale, speedscale2);
342 m.tex[0] = R_GetTexture(solidskytexture);
345 m.blendfunc1 = GL_SRC_ALPHA;
346 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
347 m.tex[0] = R_GetTexture(alphaskytexture);
348 m.texcoords[0] = tex2;
351 if (r_skyflush.integer)
353 // clear the zbuffer that was used while rendering the sky
354 glClear(GL_DEPTH_BUFFER_BIT);
355 if (r_skyflush.integer)
363 else if (skyrenderbox)
367 //===============================================================
369 static byte skyupperlayerpixels[128*128*4];
370 static byte skylowerlayerpixels[128*128*4];
371 static byte skymergedpixels[128*128*4];
373 static void R_BuildSky (int scrollupper, int scrolllower)
375 int x, y, ux, uy, lx, ly;
378 for (y = 0;y < 128;y++)
380 uy = (y + scrollupper) & 127;
381 ly = (y + scrolllower) & 127;
382 for (x = 0;x < 128;x++)
384 ux = (x + scrollupper) & 127;
385 lx = (x + scrolllower) & 127;
386 u = &skyupperlayerpixels[(uy * 128 + ux) * 4];
387 l = &skylowerlayerpixels[(ly * 128 + lx) * 4];
391 *((int *)m) = *((int *)l);
394 m[0] = ((((int) l[0] - (int) u[0]) * (int) l[3]) >> 8) + (int) u[0];
395 m[1] = ((((int) l[1] - (int) u[1]) * (int) l[3]) >> 8) + (int) u[1];
396 m[2] = ((((int) l[2] - (int) u[2]) * (int) l[3]) >> 8) + (int) u[2];
401 *((int *)m) = *((int *)u);
406 R_UpdateTexture(mergeskytexture, skymergedpixels);
408 mergeskytexture = R_LoadTexture(skytexturepool, "mergedskytexture", 128, 128, skymergedpixels, TEXTYPE_RGBA, TEXF_ALWAYSPRECACHE);
415 A sky texture is 256*128, with the right side being a masked overlay
418 void R_InitSky (byte *src, int bytesperpixel)
421 unsigned trans[128*128];
426 strcpy(skyworldname, loadmodel->name);
428 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
429 R_FreeTexturePool(&skytexturepool);
430 skytexturepool = R_AllocTexturePool();
431 mergeskytexture = NULL;
432 solidskytexture = NULL;
433 alphaskytexture = NULL;
435 if (bytesperpixel == 4)
437 for (i = 0;i < 128;i++)
438 for (j = 0;j < 128;j++)
439 trans[(i*128) + j] = src[i*256+j+128];
443 // make an average value for the back to avoid
444 // a fringe on the top level
446 for (i=0 ; i<128 ; i++)
448 for (j=0 ; j<128 ; j++)
450 p = src[i*256 + j + 128];
451 rgba = &d_8to24table[p];
452 trans[(i*128) + j] = *rgba;
453 r += ((byte *)rgba)[0];
454 g += ((byte *)rgba)[1];
455 b += ((byte *)rgba)[2];
459 ((byte *)&transpix)[0] = r/(128*128);
460 ((byte *)&transpix)[1] = g/(128*128);
461 ((byte *)&transpix)[2] = b/(128*128);
462 ((byte *)&transpix)[3] = 0;
465 memcpy(skyupperlayerpixels, trans, 128*128*4);
467 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
469 for (i = 0;i < 128*128;i++)
471 ((byte *)&trans[i])[0] >>= 1;
472 ((byte *)&trans[i])[1] >>= 1;
473 ((byte *)&trans[i])[2] >>= 1;
475 solidskytexture_half = R_LoadTexture (skytexturepool, "sky_solidtexture_half", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
478 if (bytesperpixel == 4)
480 for (i = 0;i < 128;i++)
481 for (j = 0;j < 128;j++)
482 trans[(i*128) + j] = src[i*256+j];
486 for (i=0 ; i<128 ; i++)
488 for (j=0 ; j<128 ; j++)
492 trans[(i*128) + j] = transpix;
494 trans[(i*128) + j] = d_8to24table[p];
499 memcpy(skylowerlayerpixels, trans, 128*128*4);
501 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
503 for (i = 0;i < 128*128;i++)
505 ((byte *)&trans[i])[0] >>= 1;
506 ((byte *)&trans[i])[1] >>= 1;
507 ((byte *)&trans[i])[2] >>= 1;
509 alphaskytexture_half = R_LoadTexture (skytexturepool, "sky_alphatexture_half", 128, 128, (byte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);