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 // used for dlight push checking and other things
29 int c_alias_polys, c_light_polys, c_faces, c_nodes, c_leafs, c_models, c_bmodels, c_sprites, c_particles, c_dlights;
31 // true during envmap command capture
47 // 8.8 fraction of base light value
48 unsigned short d_lightstylevalue[256];
50 cvar_t r_drawentities = {0, "r_drawentities","1"};
51 cvar_t r_drawviewmodel = {0, "r_drawviewmodel","1"};
52 cvar_t r_speeds = {0, "r_speeds","0"};
53 cvar_t r_fullbright = {0, "r_fullbright","0"};
54 cvar_t r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
55 cvar_t r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
56 cvar_t r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
58 cvar_t gl_fogenable = {0, "gl_fogenable", "0"};
59 cvar_t gl_fogdensity = {0, "gl_fogdensity", "0.25"};
60 cvar_t gl_fogred = {0, "gl_fogred","0.3"};
61 cvar_t gl_foggreen = {0, "gl_foggreen","0.3"};
62 cvar_t gl_fogblue = {0, "gl_fogblue","0.3"};
63 cvar_t gl_fogstart = {0, "gl_fogstart", "0"};
64 cvar_t gl_fogend = {0, "gl_fogend","0"};
66 cvar_t r_textureunits = {0, "r_textureunits", "32"};
68 void R_ModulateColors(float *in, float *out, int verts, float r, float g, float b)
71 for (i = 0;i < verts;i++)
82 void R_FillColors(float *out, int verts, float r, float g, float b, float a)
85 for (i = 0;i < verts;i++)
99 For program optimization
102 qboolean intimerefresh = 0;
103 static void R_TimeRefresh_f (void)
106 float start, stop, time;
109 start = Sys_DoubleTime ();
110 for (i = 0;i < 128;i++)
112 r_refdef.viewangles[0] = 0;
113 r_refdef.viewangles[1] = i/128.0*360.0;
114 r_refdef.viewangles[2] = 0;
118 stop = Sys_DoubleTime ();
121 Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
124 extern cvar_t r_drawportals;
128 float fog_density, fog_red, fog_green, fog_blue;
130 qboolean oldgl_fogenable;
131 void R_SetupFog(void)
133 if (gamemode == GAME_NEHAHRA)
135 if (gl_fogenable.integer)
137 oldgl_fogenable = true;
138 fog_density = gl_fogdensity.value;
139 fog_red = gl_fogred.value;
140 fog_green = gl_foggreen.value;
141 fog_blue = gl_fogblue.value;
143 else if (oldgl_fogenable)
145 oldgl_fogenable = false;
154 fogcolor[0] = fog_red = bound(0.0f, fog_red , 1.0f);
155 fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
156 fogcolor[2] = fog_blue = bound(0.0f, fog_blue , 1.0f);
161 fogdensity = -4000.0f / (fog_density * fog_density);
162 // fog color was already set
168 // FIXME: move this to client?
171 if (gamemode == GAME_NEHAHRA)
173 Cvar_Set("gl_fogenable", "0");
174 Cvar_Set("gl_fogdensity", "0.2");
175 Cvar_Set("gl_fogred", "0.3");
176 Cvar_Set("gl_foggreen", "0.3");
177 Cvar_Set("gl_fogblue", "0.3");
179 fog_density = fog_red = fog_green = fog_blue = 0.0f;
182 // FIXME: move this to client?
183 void FOG_registercvars(void)
185 if (gamemode == GAME_NEHAHRA)
187 Cvar_RegisterVariable (&gl_fogenable);
188 Cvar_RegisterVariable (&gl_fogdensity);
189 Cvar_RegisterVariable (&gl_fogred);
190 Cvar_RegisterVariable (&gl_foggreen);
191 Cvar_RegisterVariable (&gl_fogblue);
192 Cvar_RegisterVariable (&gl_fogstart);
193 Cvar_RegisterVariable (&gl_fogend);
197 void gl_main_start(void)
201 void gl_main_shutdown(void)
205 extern void CL_ParseEntityLump(char *entitystring);
206 void gl_main_newmap(void)
208 if (cl.worldmodel && cl.worldmodel->entities)
209 CL_ParseEntityLump(cl.worldmodel->entities);
213 void GL_Main_Init(void)
215 // FIXME: move this to client?
217 Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);
218 Cvar_RegisterVariable (&r_drawentities);
219 Cvar_RegisterVariable (&r_drawviewmodel);
220 Cvar_RegisterVariable (&r_speeds);
221 Cvar_RegisterVariable (&r_fullbrights);
222 Cvar_RegisterVariable (&r_wateralpha);
223 Cvar_RegisterVariable (&r_dynamic);
224 Cvar_RegisterVariable (&r_fullbright);
225 Cvar_RegisterVariable (&r_textureunits);
226 if (gamemode == GAME_NEHAHRA)
227 Cvar_SetValue("r_fullbrights", 0);
228 R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
231 vec3_t r_farclip_origin;
232 vec3_t r_farclip_direction;
233 vec_t r_farclip_directiondist;
234 vec_t r_farclip_meshfarclip;
235 int r_farclip_directionbit0;
236 int r_farclip_directionbit1;
237 int r_farclip_directionbit2;
239 // start a farclip measuring session
240 void R_FarClip_Start(vec3_t origin, vec3_t direction, vec_t startfarclip)
242 VectorCopy(origin, r_farclip_origin);
243 VectorCopy(direction, r_farclip_direction);
244 r_farclip_directiondist = DotProduct(r_farclip_origin, r_farclip_direction);
245 r_farclip_directionbit0 = r_farclip_direction[0] < 0;
246 r_farclip_directionbit1 = r_farclip_direction[1] < 0;
247 r_farclip_directionbit2 = r_farclip_direction[2] < 0;
248 r_farclip_meshfarclip = r_farclip_directiondist + startfarclip;
251 // enlarge farclip to accomodate box
252 void R_FarClip_Box(vec3_t mins, vec3_t maxs)
255 d = (r_farclip_directionbit0 ? mins[0] : maxs[0]) * r_farclip_direction[0]
256 + (r_farclip_directionbit1 ? mins[1] : maxs[1]) * r_farclip_direction[1]
257 + (r_farclip_directionbit2 ? mins[2] : maxs[2]) * r_farclip_direction[2];
258 if (r_farclip_meshfarclip < d)
259 r_farclip_meshfarclip = d;
262 // return farclip value
263 float R_FarClip_Finish(void)
265 return r_farclip_meshfarclip - r_farclip_directiondist;
278 extern void R_Textures_Init(void);
279 extern void Mod_RenderInit(void);
280 extern void GL_Draw_Init(void);
281 extern void GL_Main_Init(void);
282 extern void GL_Models_Init(void);
283 extern void R_Sky_Init(void);
284 extern void GL_Surf_Init(void);
285 extern void R_Crosshairs_Init(void);
286 extern void R_Light_Init(void);
287 extern void R_Particles_Init(void);
288 extern void R_Explosion_Init(void);
289 extern void ui_init(void);
290 extern void gl_backend_init(void);
292 void Render_Init(void)
294 R_Modules_Shutdown();
317 extern char *ENGINE_EXTENSIONS;
320 VID_CheckExtensions();
322 // LordHavoc: report supported extensions
323 Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
325 qglCullFace(GL_FRONT);
326 qglEnable(GL_TEXTURE_2D);
330 //==================================================================================
332 static void R_MarkEntities (void)
336 entity_render_t *ent;
338 ent = &cl_entities[0].render;
339 Matrix4x4_CreateIdentity(&ent->matrix);
340 Matrix4x4_CreateIdentity(&ent->inversematrix);
343 R_FarClip_Box(cl.worldmodel->normalmins, cl.worldmodel->normalmaxs);
345 if (!r_drawentities.integer)
348 for (i = 0;i < r_refdef.numentities;i++)
350 ent = r_refdef.entities[i];
351 Mod_CheckLoaded(ent->model);
353 // move view-relative models to where they should be
354 if (ent->flags & RENDER_VIEWMODEL)
356 // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
357 ent->flags -= RENDER_VIEWMODEL;
359 VectorCopy(ent->origin, v);
360 ent->origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
361 ent->origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
362 ent->origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
364 VectorAdd(ent->angles, r_refdef.viewangles, ent->angles);
367 if (R_CullBox(ent->mins, ent->maxs))
370 ent->visframe = r_framecount;
371 VectorCopy(ent->angles, v);
372 if (!ent->model || ent->model->type != mod_brush)
374 Matrix4x4_CreateFromQuakeEntity(&ent->matrix, ent->origin[0], ent->origin[1], ent->origin[2], v[0], v[1], v[2], ent->scale);
375 Matrix4x4_Invert_Simple(&ent->inversematrix, &ent->matrix);
376 R_LerpAnimation(ent);
377 R_UpdateEntLights(ent);
378 R_FarClip_Box(ent->mins, ent->maxs);
382 // only used if skyrendermasked, and normally returns false
383 int R_DrawBrushModelsSky (void)
386 entity_render_t *ent;
388 if (!r_drawentities.integer)
392 for (i = 0;i < r_refdef.numentities;i++)
394 ent = r_refdef.entities[i];
395 if (ent->visframe == r_framecount && ent->model && ent->model->DrawSky)
397 ent->model->DrawSky(ent);
404 void R_DrawNoModel(entity_render_t *ent);
405 void R_DrawModels (void)
408 entity_render_t *ent;
410 if (!r_drawentities.integer)
413 for (i = 0;i < r_refdef.numentities;i++)
415 ent = r_refdef.entities[i];
416 if (ent->visframe == r_framecount)
420 if (ent->model->Draw)
421 ent->model->Draw(ent);
434 void R_DrawViewModel (void)
436 entity_render_t *ent;
438 // FIXME: move these checks to client
439 if (!r_drawviewmodel.integer || chase_active.integer || envmap || !r_drawentities.integer || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
442 ent = &cl.viewent.render;
443 Mod_CheckLoaded(ent->model);
444 R_LerpAnimation(ent);
445 Matrix4x4_CreateFromQuakeEntity(&ent->matrix, ent->origin[0], ent->origin[1], ent->origin[2], -ent->angles[0], ent->angles[1], ent->angles[2], ent->scale);
446 Matrix4x4_Invert_Simple(&ent->inversematrix, &ent->matrix);
447 R_UpdateEntLights(ent);
448 ent->model->Draw(ent);
451 static void R_SetFrustum (void)
455 // LordHavoc: note to all quake engine coders, the special case for 90
456 // degrees assumed a square view (wrong), so I removed it, Quake2 has it
458 // rotate VPN right by FOV_X/2 degrees
459 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
460 // rotate VPN left by FOV_X/2 degrees
461 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
462 // rotate VPN up by FOV_X/2 degrees
463 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
464 // rotate VPN down by FOV_X/2 degrees
465 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
467 for (i = 0;i < 4;i++)
469 frustum[i].type = PLANE_ANYZ;
470 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
471 PlaneClassify(&frustum[i]);
480 static void R_SetupFrame (void)
482 // don't allow cheats in multiplayer
483 if (cl.maxclients > 1)
485 if (r_fullbright.integer != 0)
486 Cvar_Set ("r_fullbright", "0");
487 if (r_ambient.value != 0)
488 Cvar_Set ("r_ambient", "0");
493 // build the transformation matrix for the given view angles
494 VectorCopy (r_refdef.vieworg, r_origin);
496 AngleVectors (r_refdef.viewangles, vpn, vright, vup);
502 static void R_BlendView(void)
507 if (r_refdef.viewblend[3] < 0.01f)
510 memset(&m, 0, sizeof(m));
511 m.blendfunc1 = GL_SRC_ALPHA;
512 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
513 m.depthdisable = true; // magic
516 Matrix4x4_CreateIdentity(&m.matrix);
517 if (R_Mesh_Draw_GetBuffer(&m, false))
522 m.color[0] = m.color[4] = m.color[8] = r_refdef.viewblend[0];
523 m.color[1] = m.color[5] = m.color[9] = r_refdef.viewblend[1];
524 m.color[2] = m.color[6] = m.color[10] = r_refdef.viewblend[2];
525 m.color[3] = m.color[7] = m.color[11] = r_refdef.viewblend[3];
527 m.vertex[0] = r_origin[0] + vpn[0] * 1.5 - vright[0] * r - vup[0] * r;
528 m.vertex[1] = r_origin[1] + vpn[1] * 1.5 - vright[1] * r - vup[1] * r;
529 m.vertex[2] = r_origin[2] + vpn[2] * 1.5 - vright[2] * r - vup[2] * r;
531 m.vertex[4] = m.vertex[0] + vup[0] * r;
532 m.vertex[5] = m.vertex[1] + vup[1] * r;
533 m.vertex[6] = m.vertex[2] + vup[2] * r;
534 m.vertex[8] = m.vertex[0] + vright[0] * r;
535 m.vertex[9] = m.vertex[1] + vright[1] * r;
536 m.vertex[10] = m.vertex[2] + vright[2] * r;
545 r_refdef must be set before the first call
548 void R_RenderView (void)
550 entity_render_t *world;
551 if (!r_refdef.entities/* || !cl.worldmodel*/)
552 return; //Host_Error ("R_RenderView: NULL worldmodel");
554 world = &cl_entities[0].render;
556 // FIXME: move to client
558 R_TimeReport("mexplosion");
566 R_TimeReport("setup");
568 R_FarClip_Start(r_origin, vpn, 768.0f);
570 r_farclip = R_FarClip_Finish() + 256.0f;
571 R_TimeReport("markentity");
573 R_Mesh_Start(r_farclip);
574 R_MeshQueue_BeginScene();
576 if (R_DrawBrushModelsSky())
577 R_TimeReport("bmodelsky");
582 R_TimeReport("worldnode");
584 R_SurfMarkLights(world);
585 R_TimeReport("marklights");
587 R_PrepareSurfaces(world);
588 R_TimeReport("surfprep");
590 R_DrawSurfaces(world, SHADERSTAGE_SKY);
591 R_DrawSurfaces(world, SHADERSTAGE_NORMAL);
592 R_TimeReport("surfdraw");
594 if (r_drawportals.integer)
596 R_DrawPortals(world);
597 R_TimeReport("portals");
601 // don't let sound skip if going slow
602 if (!intimerefresh && !r_speeds.integer)
606 R_TimeReport("viewmodel");
609 R_TimeReport("models");
612 R_TimeReport("particles");
615 R_TimeReport("explosions");
617 R_MeshQueue_RenderTransparent();
618 R_TimeReport("addtrans");
621 R_TimeReport("coronas");
624 R_TimeReport("crosshair");
627 R_TimeReport("blendview");
629 R_MeshQueue_Render();
630 R_MeshQueue_EndScene();
632 R_TimeReport("meshfinish");
635 void R_DrawBBoxMesh(vec3_t mins, vec3_t maxs, float cr, float cg, float cb, float ca)
638 float *v, *c, f1, f2, diff[3];
642 m.blendfunc1 = GL_SRC_ALPHA;
643 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
644 Matrix4x4_CreateIdentity(&m.matrix);
645 if (R_Mesh_Draw_GetBuffer(&m, false))
647 m.vertex[ 0] = mins[0];m.vertex[ 1] = mins[1];m.vertex[ 2] = mins[2];
648 m.vertex[ 4] = maxs[0];m.vertex[ 5] = mins[1];m.vertex[ 6] = mins[2];
649 m.vertex[ 8] = mins[0];m.vertex[ 9] = maxs[1];m.vertex[10] = mins[2];
650 m.vertex[12] = maxs[0];m.vertex[13] = maxs[1];m.vertex[14] = mins[2];
651 m.vertex[16] = mins[0];m.vertex[17] = mins[1];m.vertex[18] = maxs[2];
652 m.vertex[20] = maxs[0];m.vertex[21] = mins[1];m.vertex[22] = maxs[2];
653 m.vertex[24] = mins[0];m.vertex[25] = maxs[1];m.vertex[26] = maxs[2];
654 m.vertex[28] = maxs[0];m.vertex[29] = maxs[1];m.vertex[30] = maxs[2];
655 m.color[ 0] = m.color[ 4] = m.color[ 8] = m.color[12] = m.color[16] = m.color[20] = m.color[24] = m.color[28] = cr * m.colorscale;
656 m.color[ 1] = m.color[ 5] = m.color[ 9] = m.color[13] = m.color[17] = m.color[21] = m.color[25] = m.color[29] = cg * m.colorscale;
657 m.color[ 2] = m.color[ 6] = m.color[10] = m.color[14] = m.color[18] = m.color[22] = m.color[26] = m.color[30] = cb * m.colorscale;
658 m.color[ 3] = m.color[ 7] = m.color[11] = m.color[15] = m.color[19] = m.color[23] = m.color[27] = m.color[31] = ca;
661 for (i = 0, v = m.vertex, c = m.color;i < m.numverts;i++, v += 4, c += 4)
663 VectorSubtract(v, r_origin, diff);
664 f2 = exp(fogdensity/DotProduct(diff, diff));
667 c[0] = c[0] * f1 + fogcolor[0] * f2;
668 c[1] = c[1] * f1 + fogcolor[1] * f2;
669 c[2] = c[2] * f1 + fogcolor[2] * f2;
676 void R_DrawNoModelCallback(const void *calldata1, int calldata2)
678 const entity_render_t *ent = calldata1;
680 float f1, f2, *c, diff[3];
682 memset(&m, 0, sizeof(m));
683 if (ent->flags & EF_ADDITIVE)
685 m.blendfunc1 = GL_SRC_ALPHA;
686 m.blendfunc2 = GL_ONE;
688 else if (ent->alpha < 1)
690 m.blendfunc1 = GL_SRC_ALPHA;
691 m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
695 m.blendfunc1 = GL_ONE;
696 m.blendfunc2 = GL_ZERO;
700 m.matrix = ent->matrix;
701 if (R_Mesh_Draw_GetBuffer(&m, false))
703 m.index[ 0] = 5;m.index[ 1] = 2;m.index[ 2] = 0;
704 m.index[ 3] = 5;m.index[ 4] = 1;m.index[ 5] = 2;
705 m.index[ 6] = 5;m.index[ 7] = 0;m.index[ 8] = 3;
706 m.index[ 9] = 5;m.index[10] = 3;m.index[11] = 1;
707 m.index[12] = 0;m.index[13] = 2;m.index[14] = 4;
708 m.index[15] = 2;m.index[16] = 1;m.index[17] = 4;
709 m.index[18] = 3;m.index[19] = 0;m.index[20] = 4;
710 m.index[21] = 1;m.index[22] = 3;m.index[23] = 4;
711 m.vertex[ 0] = -16;m.vertex[ 1] = 0;m.vertex[ 2] = 0;
712 m.vertex[ 4] = 16;m.vertex[ 5] = 0;m.vertex[ 6] = 0;
713 m.vertex[ 8] = 0;m.vertex[ 9] = -16;m.vertex[10] = 0;
714 m.vertex[12] = 0;m.vertex[13] = 16;m.vertex[14] = 0;
715 m.vertex[16] = 0;m.vertex[17] = 0;m.vertex[18] = -16;
716 m.vertex[20] = 0;m.vertex[21] = 0;m.vertex[22] = 16;
717 m.color[ 0] = 0.00f;m.color[ 1] = 0.00f;m.color[ 2] = 0.50f;m.color[ 3] = ent->alpha;
718 m.color[ 4] = 0.00f;m.color[ 5] = 0.00f;m.color[ 6] = 0.50f;m.color[ 7] = ent->alpha;
719 m.color[ 8] = 0.00f;m.color[ 9] = 0.50f;m.color[10] = 0.00f;m.color[11] = ent->alpha;
720 m.color[12] = 0.00f;m.color[13] = 0.50f;m.color[14] = 0.00f;m.color[15] = ent->alpha;
721 m.color[16] = 0.50f;m.color[17] = 0.00f;m.color[18] = 0.00f;m.color[19] = ent->alpha;
722 m.color[20] = 0.50f;m.color[21] = 0.00f;m.color[22] = 0.00f;m.color[23] = ent->alpha;
725 VectorSubtract(ent->origin, r_origin, diff);
726 f2 = exp(fogdensity/DotProduct(diff, diff));
728 for (i = 0, c = m.color;i < m.numverts;i++, c += 4)
730 c[0] = (c[0] * f1 + fogcolor[0] * f2) * m.colorscale;
731 c[1] = (c[1] * f1 + fogcolor[1] * f2) * m.colorscale;
732 c[2] = (c[2] * f1 + fogcolor[2] * f2) * m.colorscale;
737 for (i = 0, c = m.color;i < m.numverts;i++, c += 4)
739 c[0] *= m.colorscale;
740 c[1] *= m.colorscale;
741 c[2] *= m.colorscale;
748 void R_DrawNoModel(entity_render_t *ent)
750 //if ((ent->effects & EF_ADDITIVE) || (ent->alpha < 1))
751 R_MeshQueue_AddTransparent(ent->origin, R_DrawNoModelCallback, ent, 0);
753 // R_DrawNoModelCallback(ent, 0);