2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 entity_render_t *currentrenderentity;
26 // used for dlight push checking and other things
31 int c_brush_polys, c_alias_polys, c_light_polys, c_faces, c_nodes, c_leafs, c_models, c_bmodels, c_sprites, c_particles, c_dlights;
33 // true during envmap command capture
49 mleaf_t *r_viewleaf, *r_oldviewleaf;
51 // 8.8 fraction of base light value
52 unsigned short d_lightstylevalue[256];
54 cvar_t r_drawentities = {0, "r_drawentities","1"};
55 cvar_t r_drawviewmodel = {0, "r_drawviewmodel","1"};
56 cvar_t r_speeds = {0, "r_speeds","0"};
57 cvar_t r_fullbright = {0, "r_fullbright","0"};
58 cvar_t r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
59 cvar_t r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
60 cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
62 cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
63 cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
64 cvar_t gl_fogred = {0, "gl_fogred","0.3"};
65 cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
66 cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
67 cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
68 cvar_t gl_fogend = {0, "gl_fogend","0"};
70 cvar_t r_textureunits = {0, "r_textureunits", "32"};
72 void R_ModulateColors(float *in, float *out, int verts, float r, float g, float b)
75 for (i = 0;i < verts;i++)
86 void R_FillColors(float *out, int verts, float r, float g, float b, float a)
89 for (i = 0;i < verts;i++)
103 For program optimization
106 qboolean intimerefresh = 0;
107 static void R_TimeRefresh_f (void)
110 float start, stop, time;
113 start = Sys_DoubleTime ();
114 for (i = 0;i < 128;i++)
116 r_refdef.viewangles[0] = 0;
117 r_refdef.viewangles[1] = i/128.0*360.0;
118 r_refdef.viewangles[2] = 0;
122 stop = Sys_DoubleTime ();
125 Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
128 extern cvar_t r_drawportals;
130 int R_VisibleCullBox (vec3_t mins, vec3_t maxs)
133 mnode_t *nodestack[8192], *node;
136 if (R_CullBox(mins, maxs))
139 node = cl.worldmodel->nodes;
141 if (node->contents < 0)
143 if (((mleaf_t *)node)->visframe == r_framecount)
147 node = nodestack[--stack];
151 sides = BOX_ON_PLANE_SIDE(mins, maxs, node->plane);
153 // recurse down the contacted sides
158 // put second child on the stack for later examination
159 nodestack[stack++] = node->children[1];
160 node = node->children[0];
165 node = node->children[0];
170 node = node->children[1];
176 float fog_density, fog_red, fog_green, fog_blue;
178 qboolean oldgl_fogenable;
179 void R_SetupFog(void)
181 if (gamemode == GAME_NEHAHRA)
183 if (gl_fogenable.integer)
185 oldgl_fogenable = true;
186 fog_density = gl_fogdensity.value;
187 fog_red = gl_fogred.value;
188 fog_green = gl_foggreen.value;
189 fog_blue = gl_fogblue.value;
191 else if (oldgl_fogenable)
193 oldgl_fogenable = false;
202 fogcolor[0] = fog_red = bound(0.0f, fog_red , 1.0f);
203 fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
204 fogcolor[2] = fog_blue = bound(0.0f, fog_blue , 1.0f);
209 fogdensity = -4000.0f / (fog_density * fog_density);
210 // fog color was already set
216 // FIXME: move this to client?
219 if (gamemode == GAME_NEHAHRA)
221 Cvar_Set("gl_fogenable", "0");
222 Cvar_Set("gl_fogdensity", "0.2");
223 Cvar_Set("gl_fogred", "0.3");
224 Cvar_Set("gl_foggreen", "0.3");
225 Cvar_Set("gl_fogblue", "0.3");
227 fog_density = fog_red = fog_green = fog_blue = 0.0f;
230 // FIXME: move this to client?
231 void FOG_registercvars(void)
233 if (gamemode == GAME_NEHAHRA)
235 Cvar_RegisterVariable (&gl_fogenable);
236 Cvar_RegisterVariable (&gl_fogdensity);
237 Cvar_RegisterVariable (&gl_fogred);
238 Cvar_RegisterVariable (&gl_foggreen);
239 Cvar_RegisterVariable (&gl_fogblue);
240 Cvar_RegisterVariable (&gl_fogstart);
241 Cvar_RegisterVariable (&gl_fogend);
245 void gl_main_start(void)
249 void gl_main_shutdown(void)
253 void gl_main_newmap(void)
258 void GL_Main_Init(void)
260 // FIXME: move this to client?
262 Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);
263 Cvar_RegisterVariable (&r_drawentities);
264 Cvar_RegisterVariable (&r_drawviewmodel);
265 Cvar_RegisterVariable (&r_speeds);
266 Cvar_RegisterVariable (&r_fullbrights);
267 Cvar_RegisterVariable (&r_wateralpha);
268 Cvar_RegisterVariable (&r_dynamic);
269 Cvar_RegisterVariable (&r_fullbright);
270 Cvar_RegisterVariable (&r_textureunits);
271 if (gamemode == GAME_NEHAHRA)
272 Cvar_SetValue("r_fullbrights", 0);
273 R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
276 vec3_t r_farclip_origin;
277 vec3_t r_farclip_direction;
278 vec_t r_farclip_directiondist;
279 vec_t r_farclip_meshfarclip;
280 int r_farclip_directionbit0;
281 int r_farclip_directionbit1;
282 int r_farclip_directionbit2;
284 // start a farclip measuring session
285 void R_FarClip_Start(vec3_t origin, vec3_t direction, vec_t startfarclip)
287 VectorCopy(origin, r_farclip_origin);
288 VectorCopy(direction, r_farclip_direction);
289 r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
290 r_farclip_directionbit0 = r_farclip_direction[0] < 0;
291 r_farclip_directionbit1 = r_farclip_direction[1] < 0;
292 r_farclip_directionbit2 = r_farclip_direction[2] < 0;
293 r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;
296 // enlarge farclip to accomodate box
297 void R_FarClip_Box(vec3_t mins, vec3_t maxs)
300 d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
301 + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
302 + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
303 if (r_farclip_meshfarclip < d)
304 r_farclip_meshfarclip = d;
307 // return farclip value
308 float R_FarClip_Finish(void)
310 return r_farclip_meshfarclip - r_farclip_directiondist;
318 void CL_ParseEntityLump(char *entitystring);
323 for (i = 0;i < 256;i++)
324 d_lightstylevalue[i] = 264; // normal light value
327 if (cl.worldmodel->entities)
328 CL_ParseEntityLump(cl.worldmodel->entities);
334 extern void R_Textures_Init(void);
335 extern void Mod_RenderInit(void);
336 extern void GL_Draw_Init(void);
337 extern void GL_Main_Init(void);
338 extern void GL_Models_Init(void);
339 extern void R_Sky_Init(void);
340 extern void GL_Surf_Init(void);
341 extern void R_Crosshairs_Init(void);
342 extern void R_Light_Init(void);
343 extern void R_Particles_Init(void);
344 extern void R_Explosion_Init(void);
345 extern void ui_init(void);
346 extern void gl_backend_init(void);
348 void Render_Init(void)
350 R_Modules_Shutdown();
372 extern char *ENGINE_EXTENSIONS;
375 VID_CheckExtensions();
377 // LordHavoc: report supported extensions
378 Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
380 qglCullFace(GL_FRONT);
381 qglEnable(GL_TEXTURE_2D);
385 //==================================================================================
387 static void R_MarkEntities (void)
392 R_FarClip_Box(cl.worldmodel->normalmins, cl.worldmodel->normalmaxs);
394 if (!r_drawentities.integer)
397 for (i = 0;i < r_refdef.numentities;i++)
399 currentrenderentity = r_refdef.entities[i];
400 Mod_CheckLoaded(currentrenderentity->model);
402 // move view-relative models to where they should be
403 if (currentrenderentity->flags & RENDER_VIEWMODEL)
405 // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
406 currentrenderentity->flags -= RENDER_VIEWMODEL;
408 VectorCopy(currentrenderentity->origin, v);
409 currentrenderentity->origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
410 currentrenderentity->origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
411 currentrenderentity->origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
413 VectorAdd(currentrenderentity->angles, r_refdef.viewangles, currentrenderentity->angles);
416 if (currentrenderentity->angles[0] || currentrenderentity->angles[2])
418 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmins, currentrenderentity->mins);
419 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->rotatedmaxs, currentrenderentity->maxs);
421 else if (currentrenderentity->angles[1])
423 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmins, currentrenderentity->mins);
424 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->yawmaxs, currentrenderentity->maxs);
428 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmins, currentrenderentity->mins);
429 VectorMA(currentrenderentity->origin, currentrenderentity->scale, currentrenderentity->model->normalmaxs, currentrenderentity->maxs);
431 if (R_VisibleCullBox(currentrenderentity->mins, currentrenderentity->maxs))
434 R_LerpAnimation(currentrenderentity);
435 currentrenderentity->visframe = r_framecount;
437 R_FarClip_Box(currentrenderentity->mins, currentrenderentity->maxs);
441 // only used if skyrendermasked, and normally returns false
442 int R_DrawBModelSky (void)
446 if (!r_drawentities.integer)
450 for (i = 0;i < r_refdef.numentities;i++)
452 currentrenderentity = r_refdef.entities[i];
453 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->DrawSky)
455 currentrenderentity->model->DrawSky();
462 void R_DrawModels (void)
466 if (!r_drawentities.integer)
469 for (i = 0;i < r_refdef.numentities;i++)
471 currentrenderentity = r_refdef.entities[i];
472 if (currentrenderentity->visframe == r_framecount && currentrenderentity->model->Draw)
473 currentrenderentity->model->Draw();
482 void R_DrawViewModel (void)
484 // FIXME: move these checks to client
485 if (!r_drawviewmodel.integer || chase_active.integer || envmap || !r_drawentities.integer || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
488 currentrenderentity = &cl.viewent.render;
489 Mod_CheckLoaded(currentrenderentity->model);
491 R_LerpAnimation(currentrenderentity);
493 currentrenderentity->model->Draw();
496 static void R_SetFrustum (void)
500 // LordHavoc: note to all quake engine coders, the special case for 90
501 // degrees assumed a square view (wrong), so I removed it, Quake2 has it
503 // rotate VPN right by FOV_X/2 degrees
504 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
505 // rotate VPN left by FOV_X/2 degrees
506 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
507 // rotate VPN up by FOV_X/2 degrees
508 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
509 // rotate VPN down by FOV_X/2 degrees
510 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
512 for (i = 0;i < 4;i++)
514 frustum[i].type = PLANE_ANYZ;
515 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
516 PlaneClassify(&frustum[i]);
525 static void R_SetupFrame (void)
527 // don't allow cheats in multiplayer
528 if (cl.maxclients > 1)
530 if (r_fullbright.integer != 0)
531 Cvar_Set ("r_fullbright", "0");
532 if (r_ambient.value != 0)
533 Cvar_Set ("r_ambient", "0");
538 // build the transformation matrix for the given view angles
539 VectorCopy (r_refdef.vieworg, r_origin);
541 AngleVectors (r_refdef.viewangles, vpn, vright, vup);
544 r_oldviewleaf = r_viewleaf;
545 r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
551 static void R_BlendView(void)
556 if (r_refdef.viewblend[3] < 0.01f)
559 memset(&m, 0, sizeof(m));
560 m.transparent = false;
561 m.blendfunc1 = GL_SRC_ALPHA;
562 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
563 m.depthdisable = true; // magic
566 if (R_Mesh_Draw_GetBuffer(&m, false))
571 m.color[0] = m.color[4] = m.color[8] = r_refdef.viewblend[0];
572 m.color[1] = m.color[5] = m.color[9] = r_refdef.viewblend[1];
573 m.color[2] = m.color[6] = m.color[10] = r_refdef.viewblend[2];
574 m.color[3] = m.color[7] = m.color[11] = r_refdef.viewblend[3];
576 m.vertex[0] = r_origin[0] + vpn[0] * 1.5 - vright[0] * r - vup[0] * r;
577 m.vertex[1] = r_origin[1] + vpn[1] * 1.5 - vright[1] * r - vup[1] * r;
578 m.vertex[2] = r_origin[2] + vpn[2] * 1.5 - vright[2] * r - vup[2] * r;
580 m.vertex[4] = m.vertex[0] + vup[0] * r;
581 m.vertex[5] = m.vertex[1] + vup[1] * r;
582 m.vertex[6] = m.vertex[2] + vup[2] * r;
583 m.vertex[8] = m.vertex[0] + vright[0] * r;
584 m.vertex[9] = m.vertex[1] + vright[1] * r;
585 m.vertex[10] = m.vertex[2] + vright[2] * r;
594 r_refdef must be set before the first call
597 void R_RenderView (void)
600 return; //Host_Error ("R_RenderView: NULL worldmodel");
602 // FIXME: move to client
604 R_TimeReport("mexplosion");
612 R_FarClip_Start(r_origin, vpn, 768.0f);
614 R_TimeReport("setup");
617 R_TimeReport("worldnode");
620 R_TimeReport("markentity");
623 R_TimeReport("marklights");
625 r_farclip = R_FarClip_Finish() + 256.0f;
627 R_Mesh_Start(r_farclip);
631 if (R_DrawBModelSky())
632 R_TimeReport("bmodelsky");
637 R_TimeReport("viewmodel");
640 R_SetupForWorldRendering();
642 R_TimeReport("surfprep");
644 R_DrawSurfaces(SHADERSTAGE_SKY);
645 R_DrawSurfaces(SHADERSTAGE_NORMAL);
646 R_TimeReport("surfdraw");
648 if (r_drawportals.integer)
651 R_TimeReport("portals");
654 // don't let sound skip if going slow
655 if (!intimerefresh && !r_speeds.integer)
661 R_TimeReport("viewmodel");
665 R_TimeReport("models");
668 R_TimeReport("particles");
671 R_TimeReport("explosions");
673 // draw transparent meshs
674 R_Mesh_AddTransparent();
675 R_TimeReport("addtrans");
678 R_TimeReport("coronas");
681 R_TimeReport("blendview");
684 R_TimeReport("crosshair");
686 // render any queued meshs
688 R_TimeReport("meshfinish");