6 cvar_t r_skyquality = {CVAR_SAVE, "r_skyquality", "2"};
7 cvar_t r_skyflush = {0, "r_skyflush", "0"};
9 static char skyworldname[1024];
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_sky_start(void)
22 skytexturepool = R_AllocTexturePool();
23 solidskytexture = NULL;
24 alphaskytexture = NULL;
27 static void r_sky_shutdown(void)
29 R_FreeTexturePool(&skytexturepool);
30 solidskytexture = NULL;
31 alphaskytexture = NULL;
34 int R_SetSkyBox(char *sky);
36 static void r_sky_newmap(void)
38 skyavailable_quake = false;
39 if (!strcmp(skyworldname, cl.worldmodel->name))
40 skyavailable_quake = true;
45 Cmd_AddCommand ("loadsky", &LoadSky_f);
46 Cvar_RegisterVariable (&r_skyquality);
47 Cvar_RegisterVariable (&r_skyflush);
48 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);
51 static int skyrendersphere;
52 static int skyrenderbox;
54 void R_SkyStartFrame(void)
57 skyrendersphere = false;
59 skyrenderglquake = false;
60 skyrendermasked = false;
61 if (r_skyquality.integer >= 1 && !fogenabled)
65 else if (skyavailable_quake)
67 switch(r_skyquality.integer)
70 skyrenderglquake = true;
74 skyrendersphere = true;
78 if (skyrenderbox || skyrendersphere)
80 // for depth-masked sky, render the sky on the first sky surface encountered
82 skyrendermasked = true;
87 static char skyname[256];
94 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
95 static rtexture_t *skyboxside[6];
96 int R_SetSkyBox(char *sky)
102 if (strcmp(sky, skyname) == 0) // no change
105 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
106 skyavailable_box = false;
112 if (strlen(sky) > 1000)
114 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
118 for (i = 0;i < 6;i++)
120 sprintf (name, "env/%s%s", sky, suf[i]);
121 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
123 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
124 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
126 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
130 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
131 Mem_Free(image_rgba);
134 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
136 skyavailable_box = true;
137 strcpy(skyname, sky);
143 // LordHavoc: added LoadSky console command
144 void LoadSky_f (void)
150 Con_Printf("current sky: %s\n", skyname);
152 Con_Printf("no skybox has been set\n");
155 if (R_SetSkyBox(Cmd_Argv(1)))
158 Con_Printf("skybox set to %s\n", skyname);
160 Con_Printf("skybox disabled\n");
163 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
166 Con_Printf("usage: loadsky skyname\n");
171 int skyboxindex[6] = {0, 1, 2, 0, 2, 3};
173 static void R_SkyBox(void)
176 float vert[4][4], st[4][2];
179 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
180 vert[i][0] = (x) * r + r_origin[0];\
181 vert[i][1] = (y) * r + r_origin[1];\
182 vert[i][2] = (z) * r + r_origin[2];\
183 st[i][0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
184 st[i][1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
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);
242 #define skygridx1 (skygridx + 1)
243 #define skygridxrecip (1.0f / (skygridx))
245 #define skygridy1 (skygridy + 1)
246 #define skygridyrecip (1.0f / (skygridy))
248 static float skysphere[skygridx1*skygridy1*5];
249 static int skysphereindices[skygridx*skygridy*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 (j = 0;j <= skygridy;j++)
256 a = j * skygridyrecip;
257 ax = cos(a * M_PI * 2);
258 ay = -sin(a * M_PI * 2);
259 for (i = 0;i <= skygridx;i++)
261 b = i * skygridxrecip;
262 x = cos(b * M_PI * 2);
265 v[2] = -sin(b * M_PI * 2) * dz;
266 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
267 *sphere++ = v[0] * length;
268 *sphere++ = v[1] * length;
274 index = skysphereindices;
275 for (j = 0;j < skygridy;j++)
277 for (i = 0;i < skygridx;i++)
279 *index++ = j * skygridx1 + i;
280 *index++ = j * skygridx1 + i + 1;
281 *index++ = (j + 1) * skygridx1 + i;
283 *index++ = j * skygridx1 + i + 1;
284 *index++ = (j + 1) * skygridx1 + i + 1;
285 *index++ = (j + 1) * skygridx1 + i;
291 static void skyspherearrays(float *vert, float *tex, float *tex2, float *source, float s, float s2)
293 float *v, *t, *t2, radius;
298 radius = r_farclip - 8;
299 for (i = 0;i < (skygridx1*skygridy1);i++)
301 *t++ = source[0] + s;
302 *t++ = source[1] + s;
303 *t2++ = source[0] + s2;
304 *t2++ = source[1] + s2;
305 *v++ = source[2] + r_origin[0];
306 *v++ = source[3] + r_origin[1];
307 *v++ = source[4] + r_origin[2];
313 static void R_SkySphere(void)
315 float speedscale, speedscale2;
316 float vert[skygridx1*skygridy1*4], tex[skygridx1*skygridy1*2], tex2[skygridx1*skygridy1*2];
317 static qboolean skysphereinitialized = false;
319 if (!skysphereinitialized)
321 skysphereinitialized = true;
322 skyspherecalc(skysphere, 16, 16, 16 / 3);
324 memset(&m, 0, sizeof(m));
325 m.transparent = false;
326 m.blendfunc1 = GL_ONE;
327 m.blendfunc2 = GL_ZERO;
328 m.numtriangles = skygridx*skygridy*2;
329 m.numverts = skygridx1*skygridy1;
330 m.index = skysphereindices;
332 m.vertexstep = sizeof(float[4]);
337 m.texcoords[0] = tex;
338 m.texcoordstep[0] = sizeof(float[2]);
339 speedscale = cl.time*8.0/128.0;
340 speedscale -= (int)speedscale;
341 speedscale2 = cl.time*16.0/128.0;
342 speedscale2 -= (int)speedscale2;
343 skyspherearrays(vert, tex, tex2, skysphere, speedscale, speedscale2);
344 m.tex[0] = R_GetTexture(solidskytexture);
347 m.blendfunc1 = GL_SRC_ALPHA;
348 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
349 m.tex[0] = R_GetTexture(alphaskytexture);
350 m.texcoords[0] = tex2;
360 else if (skyrenderbox)
363 // clear the zbuffer that was used while rendering the sky
368 //===============================================================
374 A sky texture is 256*128, with the right side being a masked overlay
377 void R_InitSky (qbyte *src, int bytesperpixel)
379 int i, j, p, r, g, b;
380 qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
381 unsigned trans[128*128], transpix, *rgba;
383 strcpy(skyworldname, loadmodel->name);
385 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
386 R_FreeTexturePool(&skytexturepool);
387 skytexturepool = R_AllocTexturePool();
388 solidskytexture = NULL;
389 alphaskytexture = NULL;
391 if (bytesperpixel == 4)
393 for (i = 0;i < 128;i++)
394 for (j = 0;j < 128;j++)
395 trans[(i*128) + j] = src[i*256+j+128];
399 // make an average value for the back to avoid
400 // a fringe on the top level
402 for (i=0 ; i<128 ; i++)
404 for (j=0 ; j<128 ; j++)
406 p = src[i*256 + j + 128];
407 rgba = &d_8to24table[p];
408 trans[(i*128) + j] = *rgba;
409 r += ((qbyte *)rgba)[0];
410 g += ((qbyte *)rgba)[1];
411 b += ((qbyte *)rgba)[2];
415 ((qbyte *)&transpix)[0] = r/(128*128);
416 ((qbyte *)&transpix)[1] = g/(128*128);
417 ((qbyte *)&transpix)[2] = b/(128*128);
418 ((qbyte *)&transpix)[3] = 0;
421 memcpy(skyupperlayerpixels, trans, 128*128*4);
423 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
425 if (bytesperpixel == 4)
427 for (i = 0;i < 128;i++)
428 for (j = 0;j < 128;j++)
429 trans[(i*128) + j] = src[i*256+j];
433 for (i=0 ; i<128 ; i++)
435 for (j=0 ; j<128 ; j++)
439 trans[(i*128) + j] = transpix;
441 trans[(i*128) + j] = d_8to24table[p];
446 memcpy(skylowerlayerpixels, trans, 128*128*4);
448 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);