1
2 #include "quakedef.h"
3 #include "image.h"
4
5 // FIXME: fix skybox after vid_restart
6 cvar_t r_sky = {CVAR_SAVE, "r_sky", "1", "enables sky rendering (black otherwise)"};
7 cvar_t r_skyscroll1 = {CVAR_SAVE, "r_skyscroll1", "1", "speed at which upper clouds layer scrolls in quake sky"};
8 cvar_t r_skyscroll2 = {CVAR_SAVE, "r_skyscroll2", "2", "speed at which lower clouds layer scrolls in quake sky"};
9 int skyrenderlater;
10 int skyrendermasked;
11
12 static int skyrendersphere;
13 static int skyrenderbox;
14 static rtexturepool_t *skytexturepool;
15 static char skyname[MAX_QPATH];
16 static matrix4x4_t skymatrix;
17 static matrix4x4_t skyinversematrix;
18
19 typedef struct suffixinfo_s
20 {
21 const char *suffix;
22 qboolean flipx, flipy, flipdiagonal;
23 }
24 suffixinfo_t;
25 static const suffixinfo_t suffix[3][6] =
26 {
27 {
28 {"px", false, false, false},
29 {"nx", false, false, false},
30 {"py", false, false, false},
31 {"ny", false, false, false},
32 {"pz", false, false, false},
33 {"nz", false, false, false}
34 },
35 {
36 {"posx", false, false, false},
37 {"negx", false, false, false},
38 {"posy", false, false, false},
39 {"negy", false, false, false},
40 {"posz", false, false, false},
41 {"negz", false, false, false}
42 },
43 {
44 {"rt", false, false, true},
45 {"lf", true, true, true},
46 {"bk", false, true, false},
47 {"ft", true, false, false},
48 {"up", false, false, true},
49 {"dn", false, false, true}
50 }
51 };
52
53 static skinframe_t *skyboxskinframe[6];
54
R_SkyStartFrame(void)55 void R_SkyStartFrame(void)
56 {
57 skyrendersphere = false;
58 skyrenderbox = false;
59 skyrendermasked = false;
60 // for depth-masked sky, we need to know whether any sky was rendered
61 skyrenderlater = false;
62 if (r_sky.integer)
63 {
64 if (skyboxskinframe[0] || skyboxskinframe[1] || skyboxskinframe[2] || skyboxskinframe[3] || skyboxskinframe[4] || skyboxskinframe[5])
65 skyrenderbox = true;
66 else if (r_refdef.scene.worldmodel && r_refdef.scene.worldmodel->brush.solidskyskinframe)
67 skyrendersphere = true;
68 skyrendermasked = true;
69 }
70 }
71
72 /*
73 ==================
74 R_SetSkyBox
75 ==================
76 */
R_UnloadSkyBox(void)77 static void R_UnloadSkyBox(void)
78 {
79 int i;
80 int c = 0;
81 for (i = 0;i < 6;i++)
82 {
83 if (skyboxskinframe[i])
84 {
85 // TODO: make a R_SkinFrame_Purge for single skins...
86 c++;
87 }
88 skyboxskinframe[i] = NULL;
89 }
90 if (c && developer_loading.integer)
91 Con_Printf("unloading skybox\n");
92 }
93
R_LoadSkyBox(void)94 static int R_LoadSkyBox(void)
95 {
96 int i, j, success;
97 int indices[4] = {0,1,2,3};
98 char name[MAX_INPUTLINE];
99 unsigned char *image_buffer;
100 unsigned char *temp;
101 char vabuf[1024];
102
103 R_UnloadSkyBox();
104
105 if (!skyname[0])
106 return true;
107
108 for (j=0; j<3; j++)
109 {
110 success = 0;
111 for (i=0; i<6; i++)
112 {
113 if (dpsnprintf(name, sizeof(name), "%s_%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
114 {
115 if (dpsnprintf(name, sizeof(name), "%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
116 {
117 if (dpsnprintf(name, sizeof(name), "env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
118 {
119 if (dpsnprintf(name, sizeof(name), "gfx/env/%s%s", skyname, suffix[j][i].suffix) < 0 || !(image_buffer = loadimagepixelsbgra(name, false, false, false, NULL)))
120 continue;
121 }
122 }
123 }
124 temp = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
125 Image_CopyMux (temp, image_buffer, image_width, image_height, suffix[j][i].flipx, suffix[j][i].flipy, suffix[j][i].flipdiagonal, 4, 4, indices);
126 skyboxskinframe[i] = R_SkinFrame_LoadInternalBGRA(va(vabuf, sizeof(vabuf), "skyboxside%d", i), TEXF_CLAMP | (gl_texturecompression_sky.integer ? TEXF_COMPRESS : 0), temp, image_width, image_height, vid.sRGB3D);
127 Mem_Free(image_buffer);
128 Mem_Free(temp);
129 success++;
130 }
131
132 if (success)
133 break;
134 }
135
136 if (j == 3)
137 return false;
138
139 if (developer_loading.integer)
140 Con_Printf("loading skybox \"%s\"\n", name);
141
142 return true;
143 }
144
R_SetSkyBox(const char * sky)145 int R_SetSkyBox(const char *sky)
146 {
147 if (strcmp(sky, skyname) == 0) // no change
148 return true;
149
150 if (strlen(sky) > 1000)
151 {
152 Con_Printf("sky name too long (%i, max is 1000)\n", (int)strlen(sky));
153 return false;
154 }
155
156 strlcpy(skyname, sky, sizeof(skyname));
157
158 return R_LoadSkyBox();
159 }
160
161 // LordHavoc: added LoadSky console command
LoadSky_f(void)162 static void LoadSky_f (void)
163 {
164 switch (Cmd_Argc())
165 {
166 case 1:
167 if (skyname[0])
168 Con_Printf("current sky: %s\n", skyname);
169 else
170 Con_Print("no skybox has been set\n");
171 break;
172 case 2:
173 if (R_SetSkyBox(Cmd_Argv(1)))
174 {
175 if (skyname[0])
176 Con_Printf("skybox set to %s\n", skyname);
177 else
178 Con_Print("skybox disabled\n");
179 }
180 else
181 Con_Printf("failed to load skybox %s\n", Cmd_Argv(1));
182 break;
183 default:
184 Con_Print("usage: loadsky skyname\n");
185 break;
186 }
187 }
188
189 static const float skyboxvertex3f[6*4*3] =
190 {
191 // skyside[0]
192 16, -16, 16,
193 16, -16, -16,
194 16, 16, -16,
195 16, 16, 16,
196 // skyside[1]
197 -16, 16, 16,
198 -16, 16, -16,
199 -16, -16, -16,
200 -16, -16, 16,
201 // skyside[2]
202 16, 16, 16,
203 16, 16, -16,
204 -16, 16, -16,
205 -16, 16, 16,
206 // skyside[3]
207 -16, -16, 16,
208 -16, -16, -16,
209 16, -16, -16,
210 16, -16, 16,
211 // skyside[4]
212 -16, -16, 16,
213 16, -16, 16,
214 16, 16, 16,
215 -16, 16, 16,
216 // skyside[5]
217 16, -16, -16,
218 -16, -16, -16,
219 -16, 16, -16,
220 16, 16, -16
221 };
222
223 static const float skyboxtexcoord2f[6*4*2] =
224 {
225 // skyside[0]
226 0, 1,
227 1, 1,
228 1, 0,
229 0, 0,
230 // skyside[1]
231 1, 0,
232 0, 0,
233 0, 1,
234 1, 1,
235 // skyside[2]
236 1, 1,
237 1, 0,
238 0, 0,
239 0, 1,
240 // skyside[3]
241 0, 0,
242 0, 1,
243 1, 1,
244 1, 0,
245 // skyside[4]
246 0, 1,
247 1, 1,
248 1, 0,
249 0, 0,
250 // skyside[5]
251 0, 1,
252 1, 1,
253 1, 0,
254 0, 0
255 };
256
257 static const int skyboxelement3i[6*2*3] =
258 {
259 // skyside[3]
260 0, 1, 2,
261 0, 2, 3,
262 // skyside[1]
263 4, 5, 6,
264 4, 6, 7,
265 // skyside[0]
266 8, 9, 10,
267 8, 10, 11,
268 // skyside[2]
269 12, 13, 14,
270 12, 14, 15,
271 // skyside[4]
272 16, 17, 18,
273 16, 18, 19,
274 // skyside[5]
275 20, 21, 22,
276 20, 22, 23
277 };
278
279 static const unsigned short skyboxelement3s[6*2*3] =
280 {
281 // skyside[3]
282 0, 1, 2,
283 0, 2, 3,
284 // skyside[1]
285 4, 5, 6,
286 4, 6, 7,
287 // skyside[0]
288 8, 9, 10,
289 8, 10, 11,
290 // skyside[2]
291 12, 13, 14,
292 12, 14, 15,
293 // skyside[4]
294 16, 17, 18,
295 16, 18, 19,
296 // skyside[5]
297 20, 21, 22,
298 20, 22, 23
299 };
300
R_SkyBox(void)301 static void R_SkyBox(void)
302 {
303 int i;
304 RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, 6*4, skyboxvertex3f, skyboxtexcoord2f, NULL, NULL, NULL, NULL, 6*2, skyboxelement3i, skyboxelement3s, false, false);
305 for (i = 0;i < 6;i++)
306 if(skyboxskinframe[i])
307 R_DrawCustomSurface(skyboxskinframe[i], &identitymatrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST, i*4, 4, i*2, 2, false, false);
308 }
309
310 #define skygridx 32
311 #define skygridx1 (skygridx + 1)
312 #define skygridxrecip (1.0f / (skygridx))
313 #define skygridy 32
314 #define skygridy1 (skygridy + 1)
315 #define skygridyrecip (1.0f / (skygridy))
316 #define skysphere_numverts (skygridx1 * skygridy1)
317 #define skysphere_numtriangles (skygridx * skygridy * 2)
318 static float skysphere_vertex3f[skysphere_numverts * 3];
319 static float skysphere_texcoord2f[skysphere_numverts * 2];
320 static int skysphere_element3i[skysphere_numtriangles * 3];
321 static unsigned short skysphere_element3s[skysphere_numtriangles * 3];
322
skyspherecalc(void)323 static void skyspherecalc(void)
324 {
325 int i, j;
326 unsigned short *e;
327 float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
328 float dx, dy, dz;
329 dx = 16.0f;
330 dy = 16.0f;
331 dz = 16.0f / 3.0f;
332 vertex3f = skysphere_vertex3f;
333 texcoord2f = skysphere_texcoord2f;
334 for (j = 0;j <= skygridy;j++)
335 {
336 a = j * skygridyrecip;
337 ax = cos(a * M_PI * 2);
338 ay = -sin(a * M_PI * 2);
339 for (i = 0;i <= skygridx;i++)
340 {
341 b = i * skygridxrecip;
342 x = cos((b + 0.5) * M_PI);
343 v[0] = ax*x * dx;
344 v[1] = ay*x * dy;
345 v[2] = -sin((b + 0.5) * M_PI) * dz;
346 length = 3.0f / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
347 *texcoord2f++ = v[0] * length;
348 *texcoord2f++ = v[1] * length;
349 *vertex3f++ = v[0];
350 *vertex3f++ = v[1];
351 *vertex3f++ = v[2];
352 }
353 }
354 e = skysphere_element3s;
355 for (j = 0;j < skygridy;j++)
356 {
357 for (i = 0;i < skygridx;i++)
358 {
359 *e++ = j * skygridx1 + i;
360 *e++ = j * skygridx1 + i + 1;
361 *e++ = (j + 1) * skygridx1 + i;
362
363 *e++ = j * skygridx1 + i + 1;
364 *e++ = (j + 1) * skygridx1 + i + 1;
365 *e++ = (j + 1) * skygridx1 + i;
366 }
367 }
368 for (i = 0;i < skysphere_numtriangles*3;i++)
369 skysphere_element3i[i] = skysphere_element3s[i];
370 }
371
R_SkySphere(void)372 static void R_SkySphere(void)
373 {
374 double speedscale;
375 static qboolean skysphereinitialized = false;
376 matrix4x4_t scroll1matrix, scroll2matrix;
377 if (!skysphereinitialized)
378 {
379 skysphereinitialized = true;
380 skyspherecalc();
381 }
382
383 // wrap the scroll values just to be extra kind to float accuracy
384
385 // scroll speed for upper layer
386 speedscale = r_refdef.scene.time*r_skyscroll1.value*8.0/128.0;
387 speedscale -= floor(speedscale);
388 Matrix4x4_CreateTranslate(&scroll1matrix, speedscale, speedscale, 0);
389 // scroll speed for lower layer (transparent layer)
390 speedscale = r_refdef.scene.time*r_skyscroll2.value*8.0/128.0;
391 speedscale -= floor(speedscale);
392 Matrix4x4_CreateTranslate(&scroll2matrix, speedscale, speedscale, 0);
393
394 RSurf_ActiveCustomEntity(&skymatrix, &skyinversematrix, 0, 0, 1, 1, 1, 1, skysphere_numverts, skysphere_vertex3f, skysphere_texcoord2f, NULL, NULL, NULL, NULL, skysphere_numtriangles, skysphere_element3i, skysphere_element3s, false, false);
395 R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.solidskyskinframe, &scroll1matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST , 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
396 R_DrawCustomSurface(r_refdef.scene.worldmodel->brush.alphaskyskinframe, &scroll2matrix, MATERIALFLAG_SKY | MATERIALFLAG_FULLBRIGHT | MATERIALFLAG_NOCULLFACE | MATERIALFLAG_NODEPTHTEST | MATERIALFLAG_ALPHA | MATERIALFLAG_BLENDED, 0, skysphere_numverts, 0, skysphere_numtriangles, false, false);
397 }
398
R_Sky(void)399 void R_Sky(void)
400 {
401 Matrix4x4_CreateFromQuakeEntity(&skymatrix, r_refdef.view.origin[0], r_refdef.view.origin[1], r_refdef.view.origin[2], 0, 0, 0, r_refdef.farclip * (0.5f / 16.0f));
402 Matrix4x4_Invert_Simple(&skyinversematrix, &skymatrix);
403
404 if (skyrendersphere)
405 {
406 // this does not modify depth buffer
407 R_SkySphere();
408 }
409 else if (skyrenderbox)
410 {
411 // this does not modify depth buffer
412 R_SkyBox();
413 }
414 /* this will be skyroom someday
415 else
416 {
417 // this modifies the depth buffer so we have to clear it afterward
418 //R_SkyRoom();
419 // clear the depthbuffer that was used while rendering the skyroom
420 //GL_Clear(GL_DEPTH_BUFFER_BIT);
421 }
422 */
423 }
424
425 //===============================================================
426
R_ResetSkyBox(void)427 void R_ResetSkyBox(void)
428 {
429 R_UnloadSkyBox();
430 skyname[0] = 0;
431 R_LoadSkyBox();
432 }
433
r_sky_start(void)434 static void r_sky_start(void)
435 {
436 skytexturepool = R_AllocTexturePool();
437 R_LoadSkyBox();
438 }
439
r_sky_shutdown(void)440 static void r_sky_shutdown(void)
441 {
442 R_UnloadSkyBox();
443 R_FreeTexturePool(&skytexturepool);
444 }
445
r_sky_newmap(void)446 static void r_sky_newmap(void)
447 {
448 }
449
450
R_Sky_Init(void)451 void R_Sky_Init(void)
452 {
453 Cmd_AddCommand ("loadsky", &LoadSky_f, "load a skybox by basename (for example loadsky mtnsun_ loads mtnsun_ft.tga and so on)");
454 Cvar_RegisterVariable (&r_sky);
455 Cvar_RegisterVariable (&r_skyscroll1);
456 Cvar_RegisterVariable (&r_skyscroll2);
457 memset(&skyboxskinframe, 0, sizeof(skyboxskinframe));
458 skyname[0] = 0;
459 R_RegisterModule("R_Sky", r_sky_start, r_sky_shutdown, r_sky_newmap, NULL, NULL);
460 }
461
462