transform matrix is now separate from R_Mesh_State, a new function called R_Mesh_Matr...
[xonotic/darkplaces.git] / r_explosion.c
index 1a2470f..15212cc 100644 (file)
@@ -19,46 +19,28 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
 #include "quakedef.h"
+#include "cl_collision.h"
 
 #define MAX_EXPLOSIONS 64
 #define EXPLOSIONGRID 8
 #define EXPLOSIONVERTS ((EXPLOSIONGRID+1)*(EXPLOSIONGRID+1))
 #define EXPLOSIONTRIS (EXPLOSIONGRID*EXPLOSIONGRID*2)
-#define EXPLOSIONSTARTRADIUS (20.0f)
 #define EXPLOSIONSTARTVELOCITY (256.0f)
-#define EXPLOSIONRANDOMVELOCITY (64.0f)
 #define EXPLOSIONFADESTART (1.5f)
-#define EXPLOSIONFADERATE (4.5f)
-/*
-#define MAX_EXPLOSIONGAS (MAX_EXPLOSIONS * EXPLOSIONGAS)
-#define EXPLOSIONGAS 8
-#define EXPLOSIONGASSTARTRADIUS (15.0f)
-#define EXPLOSIONGASSTARTVELOCITY (50.0f)
-#define GASDENSITY_SCALER (32768.0f / EXPLOSIONGAS)
-#define GASFADERATE (GASDENSITY_SCALER * EXPLOSIONGAS * 2)
-
-typedef struct explosiongas_s
-{
-       float pressure;
-       vec3_t origin;
-       vec3_t velocity;
-}
-explosiongas_t;
-
-explosiongas_t explosiongas[MAX_EXPLOSIONGAS];
-*/
+#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];
 }
@@ -77,7 +59,7 @@ cvar_t r_drawexplosions = {0, "r_drawexplosions", "1"};
 void r_explosion_start(void)
 {
        int x, y;
-       byte noise1[128][128], noise2[128][128], noise3[128][128], data[128][128][4];
+       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);
@@ -114,7 +96,6 @@ void r_explosion_shutdown(void)
 void r_explosion_newmap(void)
 {
        memset(explosion, 0, sizeof(explosion));
-//     memset(explosiongas, 0, sizeof(explosiongas));
 }
 
 int R_ExplosionVert(int column, int row)
@@ -128,9 +109,15 @@ int R_ExplosionVert(int column, int row)
        explosionpoint[i][0] = cos(a) * c;
        explosionpoint[i][1] = sin(a) * c;
        explosionpoint[i][2] = -sin(b);
-       explosionnoiseindex[i] = (row % EXPLOSIONGRID) * EXPLOSIONGRID + (column % EXPLOSIONGRID);
+       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;
 }
 
@@ -152,15 +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);
@@ -171,268 +149,164 @@ void R_Explosion_Init(void)
 void R_NewExplosion(vec3_t org)
 {
        int i, j;
-       float dist, v[3], normal[3];
-       byte noise[4][EXPLOSIONGRID*EXPLOSIONGRID];
-       fractalnoise(noise[0], EXPLOSIONGRID, 4);
-       fractalnoise(noise[1], EXPLOSIONGRID, 2);
-       fractalnoise(noise[2], EXPLOSIONGRID, 2);
-       fractalnoise(noise[3], EXPLOSIONGRID, 2);
+       float dist;
+       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[3][explosionnoiseindex[j]] * (1.0f / 256.0f) + 0.5;
-                               VectorMA(org, dist, explosionspherevert[j], v);
-                               TraceLine(org, v, explosion[i].vert[j], normal, 0);
-                               VectorAdd(explosion[i].vert[j], normal, explosion[i].vert[j]);
-                               explosion[i].vertvel[j][0] = explosionspherevertvel[j][0] * dist + (((float) noise[0][explosionnoiseindex[j]] - 128.0f) * (EXPLOSIONRANDOMVELOCITY / 128.0f));
-                               explosion[i].vertvel[j][1] = explosionspherevertvel[j][1] * dist + (((float) noise[1][explosionnoiseindex[j]] - 128.0f) * (EXPLOSIONRANDOMVELOCITY / 128.0f));
-                               explosion[i].vertvel[j][2] = explosionspherevertvel[j][2] * dist + (((float) noise[2][explosionnoiseindex[j]] - 128.0f) * (EXPLOSIONRANDOMVELOCITY / 128.0f));
+                               // 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;
                }
        }
-
-       /*
-       i = 0;
-       j = EXPLOSIONGAS;
-       while (i < MAX_EXPLOSIONGAS && j > 0)
-       {
-               while (explosiongas[i].pressure > 0)
-               {
-                       i++;
-                       if (i >= MAX_EXPLOSIONGAS)
-                               return;
-               }
-               VectorRandom(v);
-               VectorMA(org, EXPLOSIONGASSTARTRADIUS, v, v);
-               TraceLine(org, v, explosiongas[i].origin, NULL, 0);
-               VectorRandom(v);
-               VectorScale(v, EXPLOSIONGASSTARTVELOCITY, explosiongas[i].velocity);
-               explosiongas[i].pressure = j * GASDENSITY_SCALER;
-               j--;
-       }
-       */
 }
 
-void R_DrawExplosion(explosion_t *e)
+void R_DrawExplosionCallback(const void *calldata1, int calldata2)
 {
-       int i;
-       float c[EXPLOSIONVERTS][4], diff[3], fog, ifog, alpha;
-       rmeshinfo_t m;
+       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.transparent = true;
        m.blendfunc1 = GL_SRC_ALPHA;
-       m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
-       m.numtriangles = EXPLOSIONTRIS;
-       m.index = &explosiontris[0][0];
-       m.numverts = EXPLOSIONVERTS;
-       m.vertex = &e->vert[0][0];
-       m.vertexstep = sizeof(float[3]);
+       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;
-       if (alpha > 1)
-               alpha = 1;
-       m.cr = 1;
-       m.cg = 1;
-       m.cb = 1;
-       m.ca = alpha;
+       VectorSubtract(r_origin, e->origin, centerdir);
+       VectorNormalizeFast(centerdir);
        if (fogenabled)
        {
-               m.color = &c[0][0];
-               m.colorstep = sizeof(float[4]);
-               for (i = 0;i < EXPLOSIONVERTS;i++)
+               for (i = 0, c = varray_color;i < EXPLOSIONVERTS;i++, c += 4)
                {
-                       // use inverse fog alpha as color
-                       VectorSubtract(e->vert[i], r_origin, diff);
-                       ifog = 1 - exp(fogdensity/DotProduct(diff,diff));
-                       if (ifog < 0)
-                               ifog = 0;
-                       c[i][0] = ifog;
-                       c[i][1] = ifog;
-                       c[i][2] = ifog;
-                       c[i][3] = alpha;
+                       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;
                }
        }
-       m.tex[0] = R_GetTexture(explosiontexture);
-       m.texcoords[0] = &explosiontexcoords[0][0];
-       m.texcoordstep[0] = sizeof(float[2]);
-
-       R_Mesh_Draw(&m);
-
-       if (fogenabled)
+       else
        {
-               m.blendfunc1 = GL_SRC_ALPHA;
-               m.blendfunc2 = GL_ONE;
-               for (i = 0;i < EXPLOSIONVERTS;i++)
+               for (i = 0, c = varray_color;i < EXPLOSIONVERTS;i++, c += 4)
                {
-                       VectorSubtract(e->vert[i], r_origin, diff);
-                       fog = exp(fogdensity/DotProduct(diff,diff));
-                       c[i][0] = fogcolor[0];
-                       c[i][1] = fogcolor[1];
-                       c[i][2] = fogcolor[2];
-                       c[i][3] = alpha * fog;
+                       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;
                }
-               //m.color = &c[0][0];
-               //m.colorstep = sizeof(float[4]);
-               m.tex[0] = R_GetTexture(explosiontexturefog);
-               R_Mesh_Draw(&m);
        }
+       R_Mesh_Draw(numverts, numtriangles);
 }
 
-void R_MoveExplosion(explosion_t *e, /*explosiongas_t **list, explosiongas_t **listend, */float frametime)
+void R_MoveExplosion(explosion_t *e)
 {
        int i;
-       float f, dot, frictionscale, end[3], impact[3], normal[3];
-       /*
-       vec3_t diff;
-       vec_t dist;
-       explosiongas_t **l;
-       */
-       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];
+                       VectorScale(e->vertvel[i], frictionscale, e->vertvel[i]);
+                       VectorMA(e->vert[i], frametime, e->vertvel[i], end);
                        if (r_explosionclip.integer)
                        {
-                               f = TraceLine(e->vert[i], end, impact, normal, 0);
-                               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) * 1.125f;
-                                       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]);
-                       }
-                       e->vertvel[i][2] += sv_gravity.value * frametime * -0.25f;
-                       VectorScale(e->vertvel[i], frictionscale, e->vertvel[i]);
-               }
-               /*
-               for (l = list;l < listend;l++)
-               {
-                       VectorSubtract(e->vert[i], (*l)->origin, diff);
-                       dist = DotProduct(diff, diff);
-                       if (dist < 4096 && dist >= 1)
-                       {
-                               dist = (*l)->pressure * frametime / dist;
-                               VectorMA(e->vertvel[i], dist, diff, e->vertvel[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_MoveExplosionGas(explosiongas_t *e, explosiongas_t **list, explosiongas_t **listend, float frametime)
-{
-       vec3_t end, diff;
-       vec_t dist, frictionscale;
-       explosiongas_t **l;
-       frictionscale = 1 - frametime;
-       frictionscale = bound(0, frictionscale, 1);
-       if (e->velocity[0] || e->velocity[1] || e->velocity[2])
-       {
-               end[0] = e->origin[0] + frametime * e->velocity[0];
-               end[1] = e->origin[1] + frametime * e->velocity[1];
-               end[2] = e->origin[2] + frametime * e->velocity[2];
-               if (r_explosionclip.integer)
-               {
-                       float f, dot;
-                       vec3_t impact, normal;
-                       f = TraceLine(e->origin, end, impact, normal, 0);
-                       VectorCopy(impact, e->origin);
-                       if (f < 1)
-                       {
-                               // clip velocity against the wall
-                               dot = DotProduct(e->velocity, normal) * -1.3f;
-                               e->velocity[0] += normal[0] * dot;
-                               e->velocity[1] += normal[1] * dot;
-                               e->velocity[2] += normal[2] * dot;
-                       }
-               }
-               else
-               {
-                       VectorCopy(end, e->origin);
-               }
-               e->velocity[2] += sv_gravity.value * frametime;
-               VectorScale(e->velocity, frictionscale, e->velocity);
-       }
-       for (l = list;l < listend;l++)
-       {
-               if (*l != e)
-               {
-                       VectorSubtract(e->origin, (*l)->origin, diff);
-                       dist = DotProduct(diff, diff);
-                       if (dist < 4096 && dist >= 1)
-                       {
-                               dist = (*l)->pressure * frametime / dist;
-                               VectorMA(e->velocity, dist, diff, e->velocity);
-                       }
-               }
-       }
-}
-*/
 
 void R_MoveExplosions(void)
 {
        int i;
        float frametime;
-//     explosiongas_t *gaslist[MAX_EXPLOSIONGAS], **l, **end;
+
        frametime = cl.time - cl.oldtime;
-       /*
-       l = &gaslist[0];
-       for (i = 0;i < MAX_EXPLOSIONGAS;i++)
-       {
-               if (explosiongas[i].pressure > 0)
-               {
-                       explosiongas[i].pressure -= frametime * GASFADERATE;
-                       if (explosiongas[i].pressure > 0)
-                               *l++ = &explosiongas[i];
-               }
-       }
-       end = l;
-       for (l = gaslist;l < end;l++)
-               R_MoveExplosionGas(*l, gaslist, end, frametime);
-       */
 
        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], /*gaslist, end, */frametime);
-               }
-       }
+               if (explosion[i].alpha > 0.01f)
+                       R_MoveExplosion(&explosion[i]);
 }
 
 void R_DrawExplosions(void)
 {
        int i;
+
        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);
 }
+