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.
22 #include "cl_collision.h"
25 #define EXPLOSIONGRID 8
26 #define EXPLOSIONVERTS ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))
27 #define EXPLOSIONTRIS (EXPLOSIONGRID*EXPLOSIONGRID*2)
29 static int numexplosions = 0;
31 static float explosiontexcoord2f[EXPLOSIONVERTS][2];
32 static unsigned short explosiontris[EXPLOSIONTRIS][3];
33 static int explosionnoiseindex[EXPLOSIONVERTS];
34 static vec3_t explosionpoint[EXPLOSIONVERTS];
36 typedef struct explosion_s
44 vec3_t vert[EXPLOSIONVERTS];
45 vec3_t vertvel[EXPLOSIONVERTS];
50 static explosion_t explosion[MAX_EXPLOSIONS];
52 static rtexture_t *explosiontexture;
53 //static rtexture_t *explosiontexturefog;
55 static rtexturepool_t *explosiontexturepool;
58 cvar_t r_explosionclip = {CVAR_SAVE, "r_explosionclip", "1", "enables collision detection for explosion shell (so that it flattens against walls and floors)"};
60 static cvar_t r_drawexplosions = {0, "r_drawexplosions", "1", "enables rendering of explosion shells (see also cl_particles_explosions_shell)"};
62 //extern qboolean r_loadfog;
63 static void r_explosion_start(void)
66 static unsigned char noise1[128][128], noise2[128][128], noise3[128][128], data[128][128][4];
67 explosiontexturepool = R_AllocTexturePool();
68 explosiontexture = NULL;
69 //explosiontexturefog = NULL;
70 fractalnoise(&noise1[0][0], 128, 32);
71 fractalnoise(&noise2[0][0], 128, 4);
72 fractalnoise(&noise3[0][0], 128, 4);
73 for (y = 0;y < 128;y++)
75 for (x = 0;x < 128;x++)
78 j = (noise1[y][x] * noise2[y][x]) * 3 / 256 - 128;
82 a = noise3[y][x] * 3 - 128;
83 data[y][x][2] = bound(0, r, 255);
84 data[y][x][1] = bound(0, g, 255);
85 data[y][x][0] = bound(0, b, 255);
86 data[y][x][3] = bound(0, a, 255);
89 explosiontexture = R_LoadTexture2D(explosiontexturepool, "explosiontexture", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, NULL);
92 // for (y = 0;y < 128;y++)
93 // for (x = 0;x < 128;x++)
94 // data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
95 // explosiontexturefog = R_LoadTexture2D(explosiontexturepool, "explosiontexture_fog", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, NULL);
97 // note that explosions survive the restart
100 static void r_explosion_shutdown(void)
102 R_FreeTexturePool(&explosiontexturepool);
105 static void r_explosion_newmap(void)
108 memset(explosion, 0, sizeof(explosion));
111 static int R_ExplosionVert(int column, int row)
115 // top and bottom rows are all one position...
116 if (row == 0 || row == EXPLOSIONGRID)
118 i = row * (EXPLOSIONGRID + 1) + column;
119 yaw = ((double) column / EXPLOSIONGRID) * M_PI * 2;
120 pitch = (((double) row / EXPLOSIONGRID) - 0.5) * M_PI;
121 explosionpoint[i][0] = cos(yaw) * cos(pitch);
122 explosionpoint[i][1] = sin(yaw) * cos(pitch);
123 explosionpoint[i][2] = 1 * -sin(pitch);
124 explosiontexcoord2f[i][0] = (float) column / (float) EXPLOSIONGRID;
125 explosiontexcoord2f[i][1] = (float) row / (float) EXPLOSIONGRID;
126 explosionnoiseindex[i] = (row % EXPLOSIONGRID) * EXPLOSIONGRID + (column % EXPLOSIONGRID);
131 void R_Explosion_Init(void)
133 #ifdef MAX_EXPLOSIONS
136 for (y = 0;y < EXPLOSIONGRID;y++)
138 for (x = 0;x < EXPLOSIONGRID;x++)
140 explosiontris[i][0] = R_ExplosionVert(x , y );
141 explosiontris[i][1] = R_ExplosionVert(x + 1, y );
142 explosiontris[i][2] = R_ExplosionVert(x , y + 1);
144 explosiontris[i][0] = R_ExplosionVert(x + 1, y );
145 explosiontris[i][1] = R_ExplosionVert(x + 1, y + 1);
146 explosiontris[i][2] = R_ExplosionVert(x , y + 1);
152 Cvar_RegisterVariable(&r_explosionclip);
153 #ifdef MAX_EXPLOSIONS
154 Cvar_RegisterVariable(&r_drawexplosions);
156 R_RegisterModule("R_Explosions", r_explosion_start, r_explosion_shutdown, r_explosion_newmap);
160 void R_NewExplosion(const vec3_t org)
162 #ifdef MAX_EXPLOSIONS
167 unsigned char noise[EXPLOSIONGRID*EXPLOSIONGRID];
168 fractalnoisequick(noise, EXPLOSIONGRID, 4); // adjust noise grid size according to explosion
169 for (i = 0, e = explosion;i < MAX_EXPLOSIONS;i++, e++)
173 numexplosions = max(numexplosions, i + 1);
174 e->starttime = cl.time;
175 e->endtime = cl.time + cl_explosions_lifetime.value;
176 e->time = e->starttime;
177 e->alpha = cl_explosions_alpha_start.value;
178 e->fade = (cl_explosions_alpha_start.value - cl_explosions_alpha_end.value) / cl_explosions_lifetime.value;
179 e->clipping = r_explosionclip.integer != 0;
180 VectorCopy(org, e->origin);
181 for (j = 0;j < EXPLOSIONVERTS;j++)
183 // calculate start origin and velocity
184 n = noise[explosionnoiseindex[j]] * (1.0f / 255.0f) + 0.5;
185 dist = n * cl_explosions_size_start.value;
186 VectorMA(e->origin, dist, explosionpoint[j], e->vert[j]);
187 dist = n * (cl_explosions_size_end.value - cl_explosions_size_start.value) / cl_explosions_lifetime.value;
188 VectorScale(explosionpoint[j], dist, e->vertvel[j]);
192 trace = CL_TraceLine(e->origin, e->vert[j], MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, true, false, NULL, false);
193 VectorCopy(trace.endpos, e->vert[i]);
202 #ifdef MAX_EXPLOSIONS
203 static void R_DrawExplosion_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
205 int surfacelistindex = 0;
206 const int numtriangles = EXPLOSIONTRIS, numverts = EXPLOSIONVERTS;
207 GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
210 GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
212 GL_CullFace(r_refdef.view.cullface_back);
213 R_EntityMatrix(&identitymatrix);
215 R_Mesh_ColorPointer(NULL, 0, 0);
216 R_Mesh_ResetTextureState();
217 R_SetupShader_Generic(explosiontexture, NULL, GL_MODULATE, 1);
218 R_Mesh_TexCoordPointer(0, 2, explosiontexcoord2f[0], 0, 0);
219 for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
221 const explosion_t *e = explosion + surfacelist[surfacelistindex];
222 R_Mesh_VertexPointer(e->vert[0], 0, 0);
223 // FIXME: fixed function path can't properly handle r_refdef.view.colorscale > 1
224 GL_Color(e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, 1);
225 R_Mesh_Draw(0, numverts, 0, numtriangles, NULL, explosiontris[0], 0, 0);
229 static void R_MoveExplosion(explosion_t *e)
232 float dot, end[3], frametime;
235 frametime = cl.time - e->time;
237 e->alpha = e->alpha - (e->fade * frametime);
238 if (e->alpha < 0 || cl.time > e->endtime)
243 for (i = 0;i < EXPLOSIONVERTS;i++)
245 if (e->vertvel[i][0] || e->vertvel[i][1] || e->vertvel[i][2])
247 VectorMA(e->vert[i], frametime, e->vertvel[i], end);
250 trace = CL_TraceLine(e->vert[i], end, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, true, false, NULL, false);
251 if (trace.fraction < 1)
253 // clip velocity against the wall
254 dot = -DotProduct(e->vertvel[i], trace.plane.normal);
255 VectorMA(e->vertvel[i], dot, trace.plane.normal, e->vertvel[i]);
257 VectorCopy(trace.endpos, e->vert[i]);
260 VectorCopy(end, e->vert[i]);
266 void R_DrawExplosions(void)
268 #ifdef MAX_EXPLOSIONS
271 if (!r_drawexplosions.integer)
274 for (i = 0;i < numexplosions;i++)
276 if (explosion[i].alpha)
278 R_MoveExplosion(&explosion[i]);
279 if (explosion[i].alpha)
280 R_MeshQueue_AddTransparent(explosion[i].origin, R_DrawExplosion_TransparentCallback, NULL, i, NULL);
283 while (numexplosions > 0 && explosion[i-1].alpha <= 0)