/r_explosion.c
C | 285 lines | 224 code | 25 blank | 36 comment | 28 complexity | d4fb68fa51992d023eb0722284a5b023 MD5 | raw file
Possible License(s): GPL-2.0
- /*
- Copyright (C) 1996-1997 Id Software, Inc.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation; either version 2
- of the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- See the GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include "quakedef.h"
- #include "cl_collision.h"
- #ifdef MAX_EXPLOSIONS
- #define EXPLOSIONGRID 8
- #define EXPLOSIONVERTS ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))
- #define EXPLOSIONTRIS (EXPLOSIONGRID*EXPLOSIONGRID*2)
- static int numexplosions = 0;
- static float explosiontexcoord2f[EXPLOSIONVERTS][2];
- static unsigned short explosiontris[EXPLOSIONTRIS][3];
- static int explosionnoiseindex[EXPLOSIONVERTS];
- static vec3_t explosionpoint[EXPLOSIONVERTS];
- typedef struct explosion_s
- {
- float starttime;
- float endtime;
- float time;
- float alpha;
- float fade;
- vec3_t origin;
- vec3_t vert[EXPLOSIONVERTS];
- vec3_t vertvel[EXPLOSIONVERTS];
- qboolean clipping;
- }
- explosion_t;
- static explosion_t explosion[MAX_EXPLOSIONS];
- static rtexture_t *explosiontexture;
- //static rtexture_t *explosiontexturefog;
- static rtexturepool_t *explosiontexturepool;
- #endif
- cvar_t r_explosionclip = {CVAR_SAVE, "r_explosionclip", "1", "enables collision detection for explosion shell (so that it flattens against walls and floors)"};
- #ifdef MAX_EXPLOSIONS
- static cvar_t r_drawexplosions = {0, "r_drawexplosions", "1", "enables rendering of explosion shells (see also cl_particles_explosions_shell)"};
- //extern qboolean r_loadfog;
- static void r_explosion_start(void)
- {
- int x, y;
- static unsigned char noise1[128][128], noise2[128][128], noise3[128][128], data[128][128][4];
- explosiontexturepool = R_AllocTexturePool();
- explosiontexture = NULL;
- //explosiontexturefog = NULL;
- fractalnoise(&noise1[0][0], 128, 32);
- fractalnoise(&noise2[0][0], 128, 4);
- fractalnoise(&noise3[0][0], 128, 4);
- for (y = 0;y < 128;y++)
- {
- for (x = 0;x < 128;x++)
- {
- int j, r, g, b, a;
- j = (noise1[y][x] * noise2[y][x]) * 3 / 256 - 128;
- r = (j * 512) / 256;
- g = (j * 256) / 256;
- b = (j * 128) / 256;
- a = noise3[y][x] * 3 - 128;
- data[y][x][2] = bound(0, r, 255);
- data[y][x][1] = bound(0, g, 255);
- data[y][x][0] = bound(0, b, 255);
- data[y][x][3] = bound(0, a, 255);
- }
- }
- explosiontexture = R_LoadTexture2D(explosiontexturepool, "explosiontexture", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, -1, NULL);
- // if (r_loadfog)
- // {
- // for (y = 0;y < 128;y++)
- // for (x = 0;x < 128;x++)
- // data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
- // explosiontexturefog = R_LoadTexture2D(explosiontexturepool, "explosiontexture_fog", 128, 128, &data[0][0][0], TEXTYPE_BGRA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_FORCELINEAR, NULL);
- // }
- // note that explosions survive the restart
- }
- static void r_explosion_shutdown(void)
- {
- R_FreeTexturePool(&explosiontexturepool);
- }
- static void r_explosion_newmap(void)
- {
- numexplosions = 0;
- memset(explosion, 0, sizeof(explosion));
- }
- static int R_ExplosionVert(int column, int row)
- {
- int i;
- float yaw, pitch;
- // top and bottom rows are all one position...
- if (row == 0 || row == EXPLOSIONGRID)
- column = 0;
- i = row * (EXPLOSIONGRID + 1) + column;
- yaw = ((double) column / EXPLOSIONGRID) * M_PI * 2;
- pitch = (((double) row / EXPLOSIONGRID) - 0.5) * M_PI;
- explosionpoint[i][0] = cos(yaw) * cos(pitch);
- explosionpoint[i][1] = sin(yaw) * cos(pitch);
- explosionpoint[i][2] = 1 * -sin(pitch);
- explosiontexcoord2f[i][0] = (float) column / (float) EXPLOSIONGRID;
- explosiontexcoord2f[i][1] = (float) row / (float) EXPLOSIONGRID;
- explosionnoiseindex[i] = (row % EXPLOSIONGRID) * EXPLOSIONGRID + (column % EXPLOSIONGRID);
- return i;
- }
- #endif
- void R_Explosion_Init(void)
- {
- #ifdef MAX_EXPLOSIONS
- int i, x, y;
- i = 0;
- for (y = 0;y < EXPLOSIONGRID;y++)
- {
- for (x = 0;x < EXPLOSIONGRID;x++)
- {
- explosiontris[i][0] = R_ExplosionVert(x , y );
- explosiontris[i][1] = R_ExplosionVert(x + 1, y );
- explosiontris[i][2] = R_ExplosionVert(x , y + 1);
- i++;
- explosiontris[i][0] = R_ExplosionVert(x + 1, y );
- explosiontris[i][1] = R_ExplosionVert(x + 1, y + 1);
- explosiontris[i][2] = R_ExplosionVert(x , y + 1);
- i++;
- }
- }
- #endif
- Cvar_RegisterVariable(&r_explosionclip);
- #ifdef MAX_EXPLOSIONS
- Cvar_RegisterVariable(&r_drawexplosions);
- R_RegisterModule("R_Explosions", r_explosion_start, r_explosion_shutdown, r_explosion_newmap, NULL, NULL);
- #endif
- }
- void R_NewExplosion(const vec3_t org)
- {
- #ifdef MAX_EXPLOSIONS
- int i, j;
- float dist, n;
- explosion_t *e;
- trace_t trace;
- unsigned char noise[EXPLOSIONGRID*EXPLOSIONGRID];
- fractalnoisequick(noise, EXPLOSIONGRID, 4); // adjust noise grid size according to explosion
- for (i = 0, e = explosion;i < MAX_EXPLOSIONS;i++, e++)
- {
- if (!e->alpha)
- {
- numexplosions = max(numexplosions, i + 1);
- e->starttime = cl.time;
- e->endtime = cl.time + cl_explosions_lifetime.value;
- e->time = e->starttime;
- e->alpha = cl_explosions_alpha_start.value;
- e->fade = (cl_explosions_alpha_start.value - cl_explosions_alpha_end.value) / cl_explosions_lifetime.value;
- e->clipping = r_explosionclip.integer != 0;
- VectorCopy(org, e->origin);
- for (j = 0;j < EXPLOSIONVERTS;j++)
- {
- // calculate start origin and velocity
- n = noise[explosionnoiseindex[j]] * (1.0f / 255.0f) + 0.5;
- dist = n * cl_explosions_size_start.value;
- VectorMA(e->origin, dist, explosionpoint[j], e->vert[j]);
- dist = n * (cl_explosions_size_end.value - cl_explosions_size_start.value) / cl_explosions_lifetime.value;
- VectorScale(explosionpoint[j], dist, e->vertvel[j]);
- // clip start origin
- if (e->clipping)
- {
- trace = CL_TraceLine(e->origin, e->vert[j], MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value, true, false, NULL, false, false);
- VectorCopy(trace.endpos, e->vert[i]);
- }
- }
- break;
- }
- }
- #endif
- }
- #ifdef MAX_EXPLOSIONS
- static void R_DrawExplosion_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
- {
- int surfacelistindex = 0;
- const int numtriangles = EXPLOSIONTRIS, numverts = EXPLOSIONVERTS;
- GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
- GL_DepthMask(false);
- GL_DepthRange(0, 1);
- GL_PolygonOffset(r_refdef.polygonfactor, r_refdef.polygonoffset);
- GL_DepthTest(true);
- GL_CullFace(r_refdef.view.cullface_back);
- R_EntityMatrix(&identitymatrix);
- // R_Mesh_ResetTextureState();
- R_SetupShader_Generic(explosiontexture, NULL, GL_MODULATE, 1, false, false, false);
- for (surfacelistindex = 0;surfacelistindex < numsurfaces;surfacelistindex++)
- {
- const explosion_t *e = explosion + surfacelist[surfacelistindex];
- // FIXME: this can't properly handle r_refdef.view.colorscale > 1
- GL_Color(e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, e->alpha * r_refdef.view.colorscale, 1);
- R_Mesh_PrepareVertices_Generic_Arrays(numverts, e->vert[0], NULL, explosiontexcoord2f[0]);
- R_Mesh_Draw(0, numverts, 0, numtriangles, NULL, NULL, 0, explosiontris[0], NULL, 0);
- }
- }
- static void R_MoveExplosion(explosion_t *e)
- {
- int i;
- float dot, end[3], frametime;
- trace_t trace;
- frametime = cl.time - e->time;
- e->time = cl.time;
- e->alpha = e->alpha - (e->fade * frametime);
- if (e->alpha < 0 || cl.time > e->endtime)
- {
- e->alpha = 0;
- return;
- }
- for (i = 0;i < EXPLOSIONVERTS;i++)
- {
- if (e->vertvel[i][0] || e->vertvel[i][1] || e->vertvel[i][2])
- {
- VectorMA(e->vert[i], frametime, e->vertvel[i], end);
- if (e->clipping)
- {
- trace = CL_TraceLine(e->vert[i], end, MOVE_NOMONSTERS, NULL, SUPERCONTENTS_SOLID, 0, 0, collision_extendmovelength.value, true, false, NULL, false, false);
- if (trace.fraction < 1)
- {
- // clip velocity against the wall
- dot = -DotProduct(e->vertvel[i], trace.plane.normal);
- VectorMA(e->vertvel[i], dot, trace.plane.normal, e->vertvel[i]);
- }
- VectorCopy(trace.endpos, e->vert[i]);
- }
- else
- VectorCopy(end, e->vert[i]);
- }
- }
- }
- #endif
- void R_DrawExplosions(void)
- {
- #ifdef MAX_EXPLOSIONS
- int i;
- if (!r_drawexplosions.integer)
- return;
- for (i = 0;i < numexplosions;i++)
- {
- if (explosion[i].alpha)
- {
- R_MoveExplosion(&explosion[i]);
- if (explosion[i].alpha)
- R_MeshQueue_AddTransparent(TRANSPARENTSORT_DISTANCE, explosion[i].origin, R_DrawExplosion_TransparentCallback, NULL, i, NULL);
- }
- }
- while (numexplosions > 0 && explosion[i-1].alpha <= 0)
- numexplosions--;
- #endif
- }