4 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1"};
5 qboolean skyavailable_quake;
6 qboolean skyavailable_box;
10 static rtexture_t *solidskytexture;
11 static rtexture_t *alphaskytexture;
12 static int skyrendersphere;
13 static int skyrenderbox;
14 static rtexturepool_t *skytexturepool;
15 static char skyname[256];
16 static char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
17 static rtexture_t *skyboxside[6];
19 void R_SkyStartFrame(void)
22 skyrendersphere = false;
24 skyrendermasked = false;
25 if (r_sky.integer && !fogenabled)
29 else if (skyavailable_quake)
30 skyrendersphere = true;
31 // for depth-masked sky, render the sky on the first sky surface encountered
33 skyrendermasked = true;
42 int R_SetSkyBox(const char *sky)
48 if (strcmp(sky, skyname) == 0) // no change
51 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
52 skyavailable_box = false;
58 if (strlen(sky) > 1000)
60 Con_Printf ("sky name too long (%i, max is 1000)\n", strlen(sky));
66 sprintf (name, "env/%s%s", sky, suf[i]);
67 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
69 sprintf (name, "gfx/env/%s%s", sky, suf[i]);
70 if (!(image_rgba = loadimagepixels(name, false, 0, 0)))
72 Con_Printf ("Couldn't load env/%s%s or gfx/env/%s%s\n", sky, suf[i], sky, suf[i]);
76 skyboxside[i] = R_LoadTexture(skytexturepool, va("skyboxside%d", i), image_width, image_height, image_rgba, TEXTYPE_RGBA, TEXF_PRECACHE);
80 if (skyboxside[0] || skyboxside[1] || skyboxside[2] || skyboxside[3] || skyboxside[4] || skyboxside[5])
82 skyavailable_box = true;
89 // LordHavoc: added LoadSky console command
96 Con_Printf("current sky: %s\n", skyname);
98 Con_Printf("no skybox has been set\n");
101 if (R_SetSkyBox(Cmd_Argv(1)))
104 Con_Printf("skybox set to %s\n", skyname);
106 Con_Printf("skybox disabled\n");
109 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
112 Con_Printf("usage: loadsky skyname\n");
117 static void R_SkyBox(void)
121 #define R_SkyBoxPolyVec(i,s,t,x,y,z) \
122 varray_vertex[i * 4 + 0] = (x) * 16.0f;\
123 varray_vertex[i * 4 + 1] = (y) * 16.0f;\
124 varray_vertex[i * 4 + 2] = (z) * 16.0f;\
125 varray_texcoord[0][i * 2 + 0] = (s) * (254.0f/256.0f) + (1.0f/256.0f);\
126 varray_texcoord[0][i * 2 + 1] = (t) * (254.0f/256.0f) + (1.0f/256.0f);
128 memset(&m, 0, sizeof(m));
129 m.blendfunc1 = GL_ONE;
130 m.blendfunc2 = GL_ZERO;
131 m.depthdisable = true; // don't modify or read zbuffer
132 m.tex[0] = R_GetTexture(skyboxside[3]); // front
135 varray_color[0] = varray_color[4] = varray_color[8] = varray_color[12] = r_colorscale;
136 varray_color[1] = varray_color[5] = varray_color[9] = varray_color[13] = r_colorscale;
137 varray_color[2] = varray_color[6] = varray_color[10] = varray_color[14] = r_colorscale;
138 varray_color[3] = varray_color[7] = varray_color[11] = varray_color[15] = 1;
140 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
141 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
142 R_SkyBoxPolyVec(2, 0, 1, 1, 1, -1);
143 R_SkyBoxPolyVec(3, 0, 0, 1, 1, 1);
144 R_Mesh_Draw(4, 2, polygonelements);
145 m.tex[0] = R_GetTexture(skyboxside[1]); // back
147 R_SkyBoxPolyVec(0, 1, 0, -1, 1, 1);
148 R_SkyBoxPolyVec(1, 1, 1, -1, 1, -1);
149 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
150 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
151 R_Mesh_Draw(4, 2, polygonelements);
152 m.tex[0] = R_GetTexture(skyboxside[0]); // right
154 R_SkyBoxPolyVec(0, 1, 0, 1, 1, 1);
155 R_SkyBoxPolyVec(1, 1, 1, 1, 1, -1);
156 R_SkyBoxPolyVec(2, 0, 1, -1, 1, -1);
157 R_SkyBoxPolyVec(3, 0, 0, -1, 1, 1);
158 R_Mesh_Draw(4, 2, polygonelements);
159 m.tex[0] = R_GetTexture(skyboxside[2]); // left
161 R_SkyBoxPolyVec(0, 1, 0, -1, -1, 1);
162 R_SkyBoxPolyVec(1, 1, 1, -1, -1, -1);
163 R_SkyBoxPolyVec(2, 0, 1, 1, -1, -1);
164 R_SkyBoxPolyVec(3, 0, 0, 1, -1, 1);
165 R_Mesh_Draw(4, 2, polygonelements);
166 m.tex[0] = R_GetTexture(skyboxside[4]); // up
168 R_SkyBoxPolyVec(0, 1, 0, 1, -1, 1);
169 R_SkyBoxPolyVec(1, 1, 1, 1, 1, 1);
170 R_SkyBoxPolyVec(2, 0, 1, -1, 1, 1);
171 R_SkyBoxPolyVec(3, 0, 0, -1, -1, 1);
172 R_Mesh_Draw(4, 2, polygonelements);
173 m.tex[0] = R_GetTexture(skyboxside[5]); // down
175 R_SkyBoxPolyVec(0, 1, 0, 1, 1, -1);
176 R_SkyBoxPolyVec(1, 1, 1, 1, -1, -1);
177 R_SkyBoxPolyVec(2, 0, 1, -1, -1, -1);
178 R_SkyBoxPolyVec(3, 0, 0, -1, 1, -1);
179 R_Mesh_Draw(4, 2, polygonelements);
183 #define skygridx1 (skygridx + 1)
184 #define skygridxrecip (1.0f / (skygridx))
186 #define skygridy1 (skygridy + 1)
187 #define skygridyrecip (1.0f / (skygridy))
189 static float skysphere[skygridx1*skygridy1*5];
190 static int skysphereindices[skygridx*skygridy*6];
191 static void skyspherecalc(float *sphere, float dx, float dy, float dz)
193 float a, b, x, ax, ay, v[3], length;
195 for (j = 0;j <= skygridy;j++)
197 a = j * skygridyrecip;
198 ax = cos(a * M_PI * 2);
199 ay = -sin(a * M_PI * 2);
200 for (i = 0;i <= skygridx;i++)
202 b = i * skygridxrecip;
203 x = cos(b * M_PI * 2);
206 v[2] = -sin(b * M_PI * 2) * dz;
207 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
208 *sphere++ = v[0] * length;
209 *sphere++ = v[1] * length;
215 index = skysphereindices;
216 for (j = 0;j < skygridy;j++)
218 for (i = 0;i < skygridx;i++)
220 *index++ = j * skygridx1 + i;
221 *index++ = j * skygridx1 + i + 1;
222 *index++ = (j + 1) * skygridx1 + i;
224 *index++ = j * skygridx1 + i + 1;
225 *index++ = (j + 1) * skygridx1 + i + 1;
226 *index++ = (j + 1) * skygridx1 + i;
232 static void skyspherearrays(float *v, float *t, float *c, float *source, float s, float colorscale)
235 for (i = 0;i < (skygridx1*skygridy1);i++, c += 4, t += 2, v += 4, source += 5)
241 t[0] = source[0] + s;
242 t[1] = source[1] + s;
249 static void R_SkySphere(void)
251 int numverts, numtriangles;
252 float speedscale, speedscale2;
253 static qboolean skysphereinitialized = false;
255 if (!skysphereinitialized)
257 skysphereinitialized = true;
258 skyspherecalc(skysphere, 16, 16, 16 / 3);
261 speedscale = cl.time*8.0/128.0;
262 speedscale -= (int)speedscale;
263 speedscale2 = cl.time*16.0/128.0;
264 speedscale2 -= (int)speedscale2;
266 numverts = skygridx1*skygridy1;
267 numtriangles = skygridx*skygridy*2;
269 R_Mesh_ResizeCheck(numverts);
271 memset(&m, 0, sizeof(m));
272 m.blendfunc1 = GL_ONE;
273 m.blendfunc2 = GL_ZERO;
274 m.depthdisable = true; // don't modify or read zbuffer
275 m.tex[0] = R_GetTexture(solidskytexture);
278 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale, r_colorscale);
279 R_Mesh_Draw(numverts, numtriangles, skysphereindices);
281 m.blendfunc1 = GL_SRC_ALPHA;
282 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
283 m.tex[0] = R_GetTexture(alphaskytexture);
286 skyspherearrays(varray_vertex, varray_texcoord[0], varray_color, skysphere, speedscale2, r_colorscale);
287 R_Mesh_Draw(numverts, numtriangles, skysphereindices);
292 matrix4x4_t skymatrix;
295 Matrix4x4_CreateTranslate(&skymatrix, r_origin[0], r_origin[1], r_origin[2]);
296 R_Mesh_Matrix(&skymatrix);
299 // this does not modify depth buffer
302 else if (skyrenderbox)
304 // this does not modify depth buffer
307 /* this will be skyroom someday
310 // this modifies the depth buffer so we have to clear it afterward
312 // clear the depthbuffer that was used while rendering the skyroom
313 //R_Mesh_ClearDepth();
319 //===============================================================
325 A sky texture is 256*128, with the right side being a masked overlay
328 void R_InitSky (qbyte *src, int bytesperpixel)
330 int i, j, p, r, g, b;
331 qbyte skyupperlayerpixels[128*128*4], skylowerlayerpixels[128*128*4];
332 unsigned trans[128*128], transpix, *rgba;
334 skyavailable_quake = true;
336 // flush skytexturepool so we won't build up a leak from uploading textures multiple times
337 R_FreeTexturePool(&skytexturepool);
338 skytexturepool = R_AllocTexturePool();
339 solidskytexture = NULL;
340 alphaskytexture = NULL;
342 if (bytesperpixel == 4)
344 for (i = 0;i < 128;i++)
345 for (j = 0;j < 128;j++)
346 trans[(i*128) + j] = src[i*256+j+128];
350 // make an average value for the back to avoid
351 // a fringe on the top level
353 for (i=0 ; i<128 ; i++)
355 for (j=0 ; j<128 ; j++)
357 p = src[i*256 + j + 128];
358 rgba = &d_8to24table[p];
359 trans[(i*128) + j] = *rgba;
360 r += ((qbyte *)rgba)[0];
361 g += ((qbyte *)rgba)[1];
362 b += ((qbyte *)rgba)[2];
366 ((qbyte *)&transpix)[0] = r/(128*128);
367 ((qbyte *)&transpix)[1] = g/(128*128);
368 ((qbyte *)&transpix)[2] = b/(128*128);
369 ((qbyte *)&transpix)[3] = 0;
372 memcpy(skyupperlayerpixels, trans, 128*128*4);
374 solidskytexture = R_LoadTexture (skytexturepool, "sky_solidtexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_PRECACHE);
376 if (bytesperpixel == 4)
378 for (i = 0;i < 128;i++)
379 for (j = 0;j < 128;j++)
380 trans[(i*128) + j] = src[i*256+j];
384 for (i=0 ; i<128 ; i++)
386 for (j=0 ; j<128 ; j++)
390 trans[(i*128) + j] = transpix;
392 trans[(i*128) + j] = d_8to24table[p];
397 memcpy(skylowerlayerpixels, trans, 128*128*4);
399 alphaskytexture = R_LoadTexture (skytexturepool, "sky_alphatexture", 128, 128, (qbyte *) trans, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
402 void R_ResetQuakeSky(void)
404 skyavailable_quake = false;
407 void R_ResetSkyBox(void)
409 skyboxside[0] = skyboxside[1] = skyboxside[2] = skyboxside[3] = skyboxside[4] = skyboxside[5] = NULL;
411 skyavailable_box = false;
414 static void r_sky_start(void)
416 skytexturepool = R_AllocTexturePool();
417 solidskytexture = NULL;
418 alphaskytexture = NULL;
421 static void r_sky_shutdown(void)
423 R_FreeTexturePool(&skytexturepool);
424 solidskytexture = NULL;
425 alphaskytexture = NULL;
428 static void r_sky_newmap(void)
432 void R_Sky_Init(void)
434 Cmd_AddCommand ("loadsky", &LoadSky_f);
435 Cvar_RegisterVariable (&r_sky);
436 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap);