--- /dev/null
+/*
+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, 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);
+ 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, 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(explosion[i].origin, R_DrawExplosion_TransparentCallback, NULL, i, NULL);
+ }
+ }
+ while (numexplosions > 0 && explosion[i-1].alpha <= 0)
+ numexplosions--;
+#endif
+}
+
projects / voretournament / voretournament.git / blobdiff