transform matrix is now separate from R_Mesh_State, a new function called R_Mesh_Matr...
[xonotic/darkplaces.git] / r_explosion.c
index db67b39..15212cc 100644 (file)
@@ -8,7 +8,7 @@ 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.  
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
 See the GNU General Public License for more details.
 
@@ -19,90 +19,78 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
 #include "quakedef.h"
-
-float TraceLine (vec3_t start, vec3_t end, vec3_t impact, vec3_t normal);
+#include "cl_collision.h"
 
 #define MAX_EXPLOSIONS 64
-#define EXPLOSIONGRID 16
+#define EXPLOSIONGRID 8
 #define EXPLOSIONVERTS ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))
-#define EXPLOSIONTRIS (EXPLOSIONVERTS*2)
-#define EXPLOSIONSTARTRADIUS (0.0f)
-#define EXPLOSIONSTARTVELOCITY (500.0f)
+#define EXPLOSIONTRIS (EXPLOSIONGRID*EXPLOSIONGRID*2)
+#define EXPLOSIONSTARTVELOCITY (256.0f)
 #define EXPLOSIONFADESTART (1.5f)
-#define EXPLOSIONFADERATE (6.0f)
+#define EXPLOSIONFADERATE (3.0f)
 
-vec3_t explosionspherevert[EXPLOSIONVERTS];
-vec3_t explosionspherevertvel[EXPLOSIONVERTS];
 float explosiontexcoords[EXPLOSIONVERTS][2];
 int explosiontris[EXPLOSIONTRIS][3];
 int explosionnoiseindex[EXPLOSIONVERTS];
 vec3_t explosionpoint[EXPLOSIONVERTS];
+vec3_t explosionspherevertvel[EXPLOSIONVERTS];
 
 typedef struct explosion_s
 {
        float starttime;
+       float time;
        float alpha;
+       vec3_t origin;
        vec3_t vert[EXPLOSIONVERTS];
        vec3_t vertvel[EXPLOSIONVERTS];
 }
 explosion_t;
 
-explosion_t explosion[128];
+explosion_t explosion[MAX_EXPLOSIONS];
 
 rtexture_t     *explosiontexture;
 rtexture_t     *explosiontexturefog;
 
+rtexturepool_t *explosiontexturepool;
+
 cvar_t r_explosionclip = {CVAR_SAVE, "r_explosionclip", "1"};
 cvar_t r_drawexplosions = {0, "r_drawexplosions", "1"};
 
-int R_ExplosionVert(int column, int row)
-{
-       int i;
-       float a, b, c;
-       i = row * (EXPLOSIONGRID + 1) + column;
-       a = row * M_PI * 2 / EXPLOSIONGRID;
-       b = column * M_PI * 2 / EXPLOSIONGRID;
-       c = cos(b);
-       explosionpoint[i][0] = cos(a) * c;
-       explosionpoint[i][1] = sin(a) * c;
-       explosionpoint[i][2] = -sin(b);
-       explosionnoiseindex[i] = (row & (EXPLOSIONGRID - 1)) * EXPLOSIONGRID + (column & (EXPLOSIONGRID - 1));
-       explosiontexcoords[i][0] = (float) column / (float) EXPLOSIONGRID;
-       explosiontexcoords[i][1] = (float) row / (float) EXPLOSIONGRID;
-       return i;
-}
-
 void r_explosion_start(void)
 {
        int x, y;
-       byte noise1[128][128], noise2[128][128], data[128][128][4];
-       fractalnoise(&noise1[0][0], 128, 2);
-       fractalnoise(&noise2[0][0], 128, 2);
+       qbyte noise1[128][128], noise2[128][128], noise3[128][128], data[128][128][4];
+       explosiontexturepool = R_AllocTexturePool();
+       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] * 3 - 128;
+                       j = (noise1[y][x] * noise2[y][x]) * 3 / 256 - 128;
                        r = (j * 512) / 256;
                        g = (j * 256) / 256;
                        b = (j * 128) / 256;
-                       a = noise2[y][x];
+                       a = noise3[y][x] * 3 - 128;
                        data[y][x][0] = bound(0, r, 255);
                        data[y][x][1] = bound(0, g, 255);
                        data[y][x][2] = bound(0, b, 255);
                        data[y][x][3] = bound(0, a, 255);
                }
        }
-       explosiontexture = R_LoadTexture ("explosiontexture", 128, 128, &data[0][0][0], TEXF_MIPMAP | TEXF_ALPHA | TEXF_RGBA | TEXF_PRECACHE);
+       explosiontexture = R_LoadTexture (explosiontexturepool, "explosiontexture", 128, 128, &data[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE);
        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_LoadTexture ("explosiontexturefog", 128, 128, &data[0][0][0], TEXF_MIPMAP | TEXF_ALPHA | TEXF_RGBA | TEXF_PRECACHE);
+       explosiontexturefog = R_LoadTexture (explosiontexturepool, "explosiontexturefog", 128, 128, &data[0][0][0], TEXTYPE_RGBA, TEXF_MIPMAP | TEXF_ALPHA | TEXF_PRECACHE);
+       // note that explosions survive the restart
 }
 
 void r_explosion_shutdown(void)
 {
+       R_FreeTexturePool(&explosiontexturepool);
 }
 
 void r_explosion_newmap(void)
@@ -110,6 +98,29 @@ void r_explosion_newmap(void)
        memset(explosion, 0, sizeof(explosion));
 }
 
+int R_ExplosionVert(int column, int row)
+{
+       int i;
+       float a, b, c;
+       i = row * (EXPLOSIONGRID + 1) + column;
+       a = row * M_PI * 2 / EXPLOSIONGRID;
+       b = column * M_PI * 2 / EXPLOSIONGRID;
+       c = cos(b);
+       explosionpoint[i][0] = cos(a) * c;
+       explosionpoint[i][1] = sin(a) * c;
+       explosionpoint[i][2] = -sin(b);
+       explosionspherevertvel[i][0] = explosionpoint[i][0] * EXPLOSIONSTARTVELOCITY;
+       explosionspherevertvel[i][1] = explosionpoint[i][1] * EXPLOSIONSTARTVELOCITY;
+       explosionspherevertvel[i][2] = explosionpoint[i][2] * EXPLOSIONSTARTVELOCITY;
+       explosiontexcoords[i][0] = (float) column / (float) EXPLOSIONGRID;
+       explosiontexcoords[i][1] = (float) row / (float) EXPLOSIONGRID;
+       // top and bottom rows are all one position...
+       if (row == 0 || row == EXPLOSIONGRID)
+               column = 0;
+       explosionnoiseindex[i] = (row % EXPLOSIONGRID) * EXPLOSIONGRID + (column % EXPLOSIONGRID);
+       return i;
+}
+
 void R_Explosion_Init(void)
 {
        int i, x, y;
@@ -128,15 +139,6 @@ void R_Explosion_Init(void)
                        i++;
                }
        }
-       for (i = 0;i < EXPLOSIONVERTS;i++)
-       {
-               explosionspherevert[i][0] = explosionpoint[i][0] * EXPLOSIONSTARTRADIUS;
-               explosionspherevert[i][1] = explosionpoint[i][1] * EXPLOSIONSTARTRADIUS;
-               explosionspherevert[i][2] = explosionpoint[i][2] * EXPLOSIONSTARTRADIUS;
-               explosionspherevertvel[i][0] = explosionpoint[i][0] * EXPLOSIONSTARTVELOCITY;
-               explosionspherevertvel[i][1] = explosionpoint[i][1] * EXPLOSIONSTARTVELOCITY;
-               explosionspherevertvel[i][2] = explosionpoint[i][2] * EXPLOSIONSTARTVELOCITY;
-       }
 
        Cvar_RegisterVariable(&r_explosionclip);
        Cvar_RegisterVariable(&r_drawexplosions);
@@ -148,127 +150,163 @@ void R_NewExplosion(vec3_t org)
 {
        int i, j;
        float dist;
-       byte noise[EXPLOSIONGRID*EXPLOSIONGRID];
-       fractalnoise(noise, EXPLOSIONGRID, 2);
+       qbyte noise[EXPLOSIONGRID*EXPLOSIONGRID];
+       fractalnoisequick(noise, EXPLOSIONGRID, 4); // adjust noise grid size according to explosion
        for (i = 0;i < MAX_EXPLOSIONS;i++)
        {
-               if (explosion[i].alpha <= 0.0f)
+               if (explosion[i].alpha <= 0.01f)
                {
+                       explosion[i].starttime = cl.time;
+                       explosion[i].time = explosion[i].starttime - 0.1;
                        explosion[i].alpha = EXPLOSIONFADESTART;
+                       VectorCopy(org, explosion[i].origin);
                        for (j = 0;j < EXPLOSIONVERTS;j++)
                        {
-                               dist = noise[explosionnoiseindex[j]] * (1.0f / 512.0f) + 0.5;
-                               explosion[i].vert[j][0] = explosionspherevert[j][0] * dist + org[0];
-                               explosion[i].vert[j][1] = explosionspherevert[j][1] * dist + org[1];
-                               explosion[i].vert[j][2] = explosionspherevert[j][2] * dist + org[2];
-                               explosion[i].vertvel[j][0] = explosionspherevertvel[j][0] * dist;
-                               explosion[i].vertvel[j][1] = explosionspherevertvel[j][1] * dist;
-                               explosion[i].vertvel[j][2] = explosionspherevertvel[j][2] * dist;
+                               // calculate start
+                               VectorCopy(explosion[i].origin, explosion[i].vert[j]);
+                               // calculate velocity
+                               dist = noise[explosionnoiseindex[j]] * (1.0f / 255.0f) + 0.5;
+                               VectorScale(explosionspherevertvel[j], dist, explosion[i].vertvel[j]);
                        }
                        break;
                }
        }
 }
 
-void R_DrawExplosion(explosion_t *e)
+void R_DrawExplosionCallback(const void *calldata1, int calldata2)
 {
-       int i, index, *indexlist = &explosiontris[0][0], alpha = bound(0, e->alpha * 128.0f, 128), texnum, fogtexnum;
-       float s, t;
-//     s = cl.time * 1;
-//     t = cl.time * 0.75;
-//     s -= (int) s;
-//     t -= (int) t;
-       s = 0;
-       t = 0;
-       /*
-       glColor4f(1,1,1,e->alpha);
-       glDisable(GL_TEXTURE_2D);
-//     glBindTexture(GL_TEXTURE_2D, explosiontexture);
-       glVertexPointer(3, GL_FLOAT, sizeof(float[3]), (float *) &e->vert[0][0]);
-//     glTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), (float *) &explosiontexcoords[0][0]);
-       glEnableClientState(GL_VERTEX_ARRAY);
-//     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-       glDrawElements(GL_TRIANGLES, EXPLOSIONTRIS, GL_UNSIGNED_INT, indexlist);
-//     glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-       glDisableClientState(GL_VERTEX_ARRAY);
-       glEnable(GL_TEXTURE_2D);
-       */
-       texnum = R_GetTexture(explosiontexture);
-       fogtexnum = R_GetTexture(explosiontexturefog);
-       for (i = 0;i < EXPLOSIONTRIS;i++)
+       int i, numtriangles, numverts;
+       float *c, *v, diff[3], centerdir[3], ifog, alpha, dist;
+       rmeshstate_t m;
+       const explosion_t *e;
+       e = calldata1;
+
+       memset(&m, 0, sizeof(m));
+       m.blendfunc1 = GL_SRC_ALPHA;
+       m.blendfunc2 = GL_ONE;
+       m.wantoverbright = false;
+       m.tex[0] = R_GetTexture(explosiontexture);
+       R_Mesh_Matrix(&r_identitymatrix);
+       R_Mesh_State(&m);
+
+       numtriangles = EXPLOSIONTRIS;
+       numverts = EXPLOSIONVERTS;
+       R_Mesh_ResizeCheck(numverts, numtriangles);
+
+       memcpy(varray_element, explosiontris, numtriangles * sizeof(int[3]));
+       for (i = 0, v = varray_vertex;i < numverts;i++, v += 4)
+       {
+               v[0] = e->vert[i][0];
+               v[1] = e->vert[i][1];
+               v[2] = e->vert[i][2];
+       }
+       memcpy(varray_texcoord[0], explosiontexcoords, numverts * sizeof(float[2]));
+       alpha = e->alpha;
+       VectorSubtract(r_origin, e->origin, centerdir);
+       VectorNormalizeFast(centerdir);
+       if (fogenabled)
        {
-               transpolybegin(texnum, 0, fogtexnum, TPOLYTYPE_ALPHA);
-               index = *indexlist++;transpolyvert(e->vert[index][0], e->vert[index][1], e->vert[index][2], explosiontexcoords[index][0] + s, explosiontexcoords[index][1] + t, 255, 255, 255, alpha);
-               index = *indexlist++;transpolyvert(e->vert[index][0], e->vert[index][1], e->vert[index][2], explosiontexcoords[index][0] + s, explosiontexcoords[index][1] + t, 255, 255, 255, alpha);
-               index = *indexlist++;transpolyvert(e->vert[index][0], e->vert[index][1], e->vert[index][2], explosiontexcoords[index][0] + s, explosiontexcoords[index][1] + t, 255, 255, 255, alpha);
-               transpolyend();
+               for (i = 0, c = varray_color;i < EXPLOSIONVERTS;i++, c += 4)
+               {
+                       VectorSubtract(e->vert[i], e->origin, diff);
+                       VectorNormalizeFast(diff);
+                       dist = (DotProduct(diff, centerdir) * 6.0f - 4.0f) * alpha;
+                       if (dist > 0)
+                       {
+                               // use inverse fog alpha
+                               VectorSubtract(e->vert[i], r_origin, diff);
+                               ifog = 1 - exp(fogdensity/DotProduct(diff,diff));
+                               dist = dist * ifog;
+                               if (dist < 0)
+                                       dist = 0;
+                               else
+                                       dist *= mesh_colorscale;
+                       }
+                       else
+                               dist = 0;
+                       c[0] = c[1] = c[2] = dist;
+                       c[3] = 1;
+               }
        }
+       else
+       {
+               for (i = 0, c = varray_color;i < EXPLOSIONVERTS;i++, c += 4)
+               {
+                       VectorSubtract(e->vert[i], e->origin, diff);
+                       VectorNormalizeFast(diff);
+                       dist = (DotProduct(diff, centerdir) * 6.0f - 4.0f) * alpha;
+                       if (dist < 0)
+                               dist = 0;
+                       else
+                               dist *= mesh_colorscale;
+                       c[0] = c[1] = c[2] = dist;
+                       c[3] = 1;
+               }
+       }
+       R_Mesh_Draw(numverts, numtriangles);
 }
 
-void R_MoveExplosion(explosion_t *e, float frametime)
+void R_MoveExplosion(explosion_t *e)
 {
        int i;
-       vec3_t end;
-       e->alpha -= frametime * EXPLOSIONFADERATE;
+       float dot, frictionscale, end[3], impact[3], normal[3], frametime;
+
+       frametime = cl.time - e->time;
+       e->time = cl.time;
+       e->alpha = EXPLOSIONFADESTART - (cl.time - e->starttime) * EXPLOSIONFADERATE;
+       if (e->alpha <= 0.01f)
+       {
+               e->alpha = -1;
+               return;
+       }
+       frictionscale = 1 - frametime;
+       frictionscale = bound(0, frictionscale, 1);
        for (i = 0;i < EXPLOSIONVERTS;i++)
        {
                if (e->vertvel[i][0] || e->vertvel[i][1] || e->vertvel[i][2])
                {
-                       end[0] = e->vert[i][0] + frametime * e->vertvel[i][0];
-                       end[1] = e->vert[i][1] + frametime * e->vertvel[i][1];
-                       end[2] = e->vert[i][2] + frametime * e->vertvel[i][2];
-                       if (r_explosionclip.value)
+                       VectorScale(e->vertvel[i], frictionscale, e->vertvel[i]);
+                       VectorMA(e->vert[i], frametime, e->vertvel[i], end);
+                       if (r_explosionclip.integer)
                        {
-                               float f, dot;
-                               vec3_t impact, normal;
-                               f = TraceLine(e->vert[i], end, impact, normal);
-                               VectorCopy(impact, e->vert[i]);
-                               if (f < 1)
+                               if (CL_TraceLine(e->vert[i], end, impact, normal, 0, true) < 1)
                                {
                                        // clip velocity against the wall
-                                       dot = -DotProduct(e->vertvel[i], normal);
-                                       e->vertvel[i][0] += normal[0] * dot;
-                                       e->vertvel[i][1] += normal[1] * dot;
-                                       e->vertvel[i][2] += normal[2] * dot;
+                                       dot = DotProduct(e->vertvel[i], normal) * -1.125f;
+                                       VectorMA(e->vertvel[i], dot, normal, e->vertvel[i]);
                                }
+                               VectorCopy(impact, e->vert[i]);
                        }
                        else
-                       {
                                VectorCopy(end, e->vert[i]);
-                       }
                }
        }
+       for (i = 0;i < EXPLOSIONGRID;i++)
+               VectorCopy(e->vert[i * (EXPLOSIONGRID + 1)], e->vert[i * (EXPLOSIONGRID + 1) + EXPLOSIONGRID]);
+       memcpy(e->vert[EXPLOSIONGRID * (EXPLOSIONGRID + 1)], e->vert[0], sizeof(float[3]) * (EXPLOSIONGRID + 1));
 }
 
+
 void R_MoveExplosions(void)
 {
        int i;
        float frametime;
+
        frametime = cl.time - cl.oldtime;
+
        for (i = 0;i < MAX_EXPLOSIONS;i++)
-       {
-               if (explosion[i].alpha > 0.0f)
-               {
-                       if (explosion[i].starttime > cl.time)
-                       {
-                               explosion[i].alpha = 0;
-                               continue;
-                       }
-                       R_MoveExplosion(&explosion[i], frametime);
-               }
-       }
+               if (explosion[i].alpha > 0.01f)
+                       R_MoveExplosion(&explosion[i]);
 }
 
 void R_DrawExplosions(void)
 {
        int i;
-       if (!r_drawexplosions.value)
+
+       if (!r_drawexplosions.integer)
                return;
        for (i = 0;i < MAX_EXPLOSIONS;i++)
-       {
-               if (explosion[i].alpha > 0.0f)
-               {
-                       R_DrawExplosion(&explosion[i]);
-               }
-       }
+               if (explosion[i].alpha > 0.01f)
+                       R_MeshQueue_AddTransparent(explosion[i].origin, R_DrawExplosionCallback, &explosion[i], 0);
 }
+