6 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1"};
8 static char skyworldname[1024];
9 rtexture_t *solidskytexture;
10 rtexture_t *alphaskytexture;
11 static qboolean skyavailable_quake;
12 static qboolean skyavailable_box;
13 static rtexturepool_t *skytexturepool;
18 static void r_sky_start(void)
20 skytexturepool = R_AllocTexturePool();
21 solidskytexture = NULL;
22 alphaskytexture = NULL;
25 static void r_sky_shutdown(void)
27 R_FreeTexturePool(&skytexturepool);
28 solidskytexture = NULL;
29 alphaskytexture = NULL;
32 int R_SetSkyBox(char *sky);
34 static void r_sky_newmap(void)
36 skyavailable_quake = false;
37 if (!strcmp(skyworldname, cl.worldmodel->name))
38 skyavailable_quake = true;
43 Cmd_AddCommand ("loadsky", &LoadSky_f);
44 Cvar_RegisterVariable (&r_sky);
45 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);
48 static int skyrendersphere;
49 static int skyrenderbox;
51 void R_SkyStartFrame(void)
54 skyrendersphere = false;
56 skyrendermasked = false;
57 if (r_sky.integer && !fogenabled)
61 else if (skyavailable_quake)
62 skyrendersphere = true;
63 // for depth-masked sky, render the sky on the first sky surface encountered
65 skyrendermasked = true;
69 static char skyname[256];
76 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
77 static rtexture_t *skyboxside[6];
78 int R_SetSkyBox(char *sky)
84 if (strcmp(sky, skyname) == 0) // no change
87 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
88 skyavailable_box = false;
94 if (strlen(sky) > 1000)
96 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
100 for (i = 0;i < 6;i++)
102 sprintf (name, "env/%s%s", sky, suf[i]);
103 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
105 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
106 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
108 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
112 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
113 Mem_Free(image_rgba);
116 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
118 skyavailable_box = true;
119 strcpy(skyname, sky);
125 // LordHavoc: added LoadSky console command
126 void LoadSky_f (void)
132 Con_Printf("current sky: %s\n", skyname);
134 Con_Printf("no skybox has been set\n");
137 if (R_SetSkyBox(Cmd_Argv(1)))
140 Con_Printf("skybox set to %s\n", skyname);
142 Con_Printf("skybox disabled\n");
145 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
148 Con_Printf("usage: loadsky skyname\n");
153 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
155 static void R_SkyBox(void)
159 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
160 m.vertex[i * 4 + 0] = (x) * 16.0f + r_origin[0];\
161 m.vertex[i * 4 + 1] = (y) * 16.0f + r_origin[1];\
162 m.vertex[i * 4 + 2] = (z) * 16.0f + r_origin[2];\
163 m.texcoords[0][i * 2 + 0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
164 m.texcoords[0][i * 2 + 1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
166 memset(&m, 0, sizeof(m));
167 m.blendfunc1 = GL_ONE;
168 m.blendfunc2 = GL_ZERO;
169 m.depthdisable = true; // don't modify or read zbuffer
172 m.tex[0] = R_GetTexture(skyboxside[3]); // front
173 if (R_Mesh_Draw_GetBuffer(&m, false))
175 memcpy(m.index, skyboxindex, sizeof(int[6]));
176 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
177 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
178 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
179 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
180 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
181 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
182 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
183 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
186 m.tex[0] = R_GetTexture(skyboxside[1]); // back
187 if (R_Mesh_Draw_GetBuffer(&m, false))
189 memcpy(m.index, skyboxindex, sizeof(int[6]));
190 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
191 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
192 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
193 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
194 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
195 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
196 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
197 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
200 m.tex[0] = R_GetTexture(skyboxside[0]); // right
201 if (R_Mesh_Draw_GetBuffer(&m, false))
203 memcpy(m.index, skyboxindex, sizeof(int[6]));
204 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
205 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
206 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
207 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
208 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
209 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
210 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
211 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
214 m.tex[0] = R_GetTexture(skyboxside[2]); // left
215 if (R_Mesh_Draw_GetBuffer(&m, false))
217 memcpy(m.index, skyboxindex, sizeof(int[6]));
218 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
219 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
220 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
221 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
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);
228 m.tex[0] = R_GetTexture(skyboxside[4]); // up
229 if (R_Mesh_Draw_GetBuffer(&m, false))
231 memcpy(m.index, skyboxindex, sizeof(int[6]));
232 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
233 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
234 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
235 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
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);
242 m.tex[0] = R_GetTexture(skyboxside[5]); // down
243 if (R_Mesh_Draw_GetBuffer(&m, false))
245 memcpy(m.index, skyboxindex, sizeof(int[6]));
246 m.color[0] = m.color[4] = m.color[8] = m.color[12] = m.colorscale;
247 m.color[1] = m.color[5] = m.color[9] = m.color[13] = m.colorscale;
248 m.color[2] = m.color[6] = m.color[10] = m.color[14] = m.colorscale;
249 m.color[3] = m.color[7] = m.color[11] = m.color[15] = 1;
250 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
251 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
252 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
253 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
259 #define skygridx1 (skygridx + 1)
260 #define skygridxrecip (1.0f / (skygridx))
262 #define skygridy1 (skygridy + 1)
263 #define skygridyrecip (1.0f / (skygridy))
265 static float skysphere[skygridx1*skygridy1*5];
266 static int skysphereindices[skygridx*skygridy*6];
267 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
269 float a, b, x, ax, ay, v[3], length;
271 for (j = 0;j <= skygridy;j++)
273 a = j * skygridyrecip;
274 ax = cos(a * M_PI * 2);
275 ay = -sin(a * M_PI * 2);
276 for (i = 0;i <= skygridx;i++)
278 b = i * skygridxrecip;
279 x = cos(b * M_PI * 2);
282 v[2] = -sin(b * M_PI * 2) * dz;
283 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
284 *sphere++ = v[0] * length;
285 *sphere++ = v[1] * length;
291 index = skysphereindices;
292 for (j = 0;j < skygridy;j++)
294 for (i = 0;i < skygridx;i++)
296 *index++ = j * skygridx1 + i;
297 *index++ = j * skygridx1 + i + 1;
298 *index++ = (j + 1) * skygridx1 + i;
300 *index++ = j * skygridx1 + i + 1;
301 *index++ = (j + 1) * skygridx1 + i + 1;
302 *index++ = (j + 1) * skygridx1 + i;
308 static void skyspherearrays(float *v, float *t, float *c, float *source, float s, float colorscale)
311 for (i = 0;i < (skygridx1*skygridy1);i++, c += 4, t += 2, v += 4, source += 5)
317 t[0] = source[0] + s;
318 t[1] = source[1] + s;
319 v[0] = source[2] + r_origin[0];
320 v[1] = source[3] + r_origin[1];
321 v[2] = source[4] + r_origin[2];
325 static void R_SkySphere(void)
327 float speedscale, speedscale2;
328 static qboolean skysphereinitialized = false;
330 if (!skysphereinitialized)
332 skysphereinitialized = true;
333 skyspherecalc(skysphere, 16, 16, 16 / 3);
336 speedscale = cl.time*8.0/128.0;
337 speedscale -= (int)speedscale;
338 speedscale2 = cl.time*16.0/128.0;
339 speedscale2 -= (int)speedscale2;
341 memset(&m, 0, sizeof(m));
342 m.blendfunc1 = GL_ONE;
343 m.blendfunc2 = GL_ZERO;
344 m.depthdisable = true; // don't modify or read zbuffer
345 m.numtriangles = skygridx*skygridy*2;
346 m.numverts = skygridx1*skygridy1;
347 m.tex[0] = R_GetTexture(solidskytexture);
348 if (R_Mesh_Draw_GetBuffer(&m, false))
350 memcpy(m.index, skysphereindices, m.numtriangles * sizeof(int[3]));
351 skyspherearrays(m.vertex, m.texcoords[0], m.color, skysphere, speedscale, m.colorscale);
354 m.blendfunc1 = GL_SRC_ALPHA;
355 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
356 m.tex[0] = R_GetTexture(alphaskytexture);
357 if (R_Mesh_Draw_GetBuffer(&m, false))
359 memcpy(m.index, skysphereindices, m.numtriangles * sizeof(int[3]));
360 skyspherearrays(m.vertex, m.texcoords[0], m.color, skysphere, speedscale2, m.colorscale);
371 // this does not modify depth buffer
374 else if (skyrenderbox)
376 // this does not modify depth buffer
379 /* this will be skyroom someday
382 // this modifies the depth buffer so we have to clear it afterward
384 // clear the depthbuffer that was used while rendering the skyroom
385 //R_Mesh_ClearDepth();
391 //===============================================================
397 A sky texture is 256*128, with the right side being a masked overlay
400 void R_InitSky (qbyte *src, int bytesperpixel)
402 int i, j, p, r, g, b;
403 qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
404 unsigned trans[128*128], transpix, *rgba;
406 strcpy(skyworldname, loadmodel->name);
408 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
409 R_FreeTexturePool(&skytexturepool);
410 skytexturepool = R_AllocTexturePool();
411 solidskytexture = NULL;
412 alphaskytexture = NULL;
414 if (bytesperpixel == 4)
416 for (i = 0;i < 128;i++)
417 for (j = 0;j < 128;j++)
418 trans[(i*128) + j] = src[i*256+j+128];
422 // make an average value for the back to avoid
423 // a fringe on the top level
425 for (i=0 ; i<128 ; i++)
427 for (j=0 ; j<128 ; j++)
429 p = src[i*256 + j + 128];
430 rgba = &d_8to24table[p];
431 trans[(i*128) + j] = *rgba;
432 r += ((qbyte *)rgba)[0];
433 g += ((qbyte *)rgba)[1];
434 b += ((qbyte *)rgba)[2];
438 ((qbyte *)&transpix)[0] = r/(128*128);
439 ((qbyte *)&transpix)[1] = g/(128*128);
440 ((qbyte *)&transpix)[2] = b/(128*128);
441 ((qbyte *)&transpix)[3] = 0;
444 memcpy(skyupperlayerpixels, trans, 128*128*4);
446 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
448 if (bytesperpixel == 4)
450 for (i = 0;i < 128;i++)
451 for (j = 0;j < 128;j++)
452 trans[(i*128) + j] = src[i*256+j];
456 for (i=0 ; i<128 ; i++)
458 for (j=0 ; j<128 ; j++)
462 trans[(i*128) + j] = transpix;
464 trans[(i*128) + j] = d_8to24table[p];
469 memcpy(skylowerlayerpixels, trans, 128*128*4);
471 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);