minor optimization to fogged decal rendering

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@1364 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/r_decals.c b/r_decals.c
index 84b9d842e094822832ffcd58593324c6ffa9db95..07a350fc50f1c3af1938fd171b657fd881b3a520 100644 (file)
--- a/r_decals.c
+++ b/r_decals.c
@@ -287,49 +287,51 @@ void R_DrawDecals (void)
                        VectorCopy(r->dir, dir);
                }
 
-               dist = -PlaneDiff(r->org, surf->plane);
-               VectorMA(r->org, dist, surf->plane->normal, impact);
-
-               ds = (int) (DotProduct(impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3]) - surf->texturemins[0];
-               dt = (int) (DotProduct(impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3]) - surf->texturemins[1];
+               m.ca = r->color[3] * exp(fogdensity/DotProduct(v,v));
 
-               if (ds < 0 || dt < 0 || ds > surf->extents[0] || dt > surf->extents[1])
+               if (m.ca >= 0.01f)
                {
-                       // this should never happen
-                       continue;
-               }
+                       dist = -PlaneDiff(r->org, surf->plane);
+                       VectorMA(r->org, dist, surf->plane->normal, impact);
 
-               tex = &particletexture[r->tex][1];
-               VectorVectors(dir, right, up);
-               VectorScale(right, r->scale, right);
-               VectorScale(up, r->scale, up);
-               tvertex[0][0] = org[0] - right[0] - up[0];
-               tvertex[0][1] = org[1] - right[1] - up[1];
-               tvertex[0][2] = org[2] - right[2] - up[2];
-               tvertex[0][3] = tex->s1;
-               tvertex[0][4] = tex->t1;
-               tvertex[1][0] = org[0] - right[0] + up[0];
-               tvertex[1][1] = org[1] - right[1] + up[1];
-               tvertex[1][2] = org[2] - right[2] + up[2];
-               tvertex[1][3] = tex->s1;
-               tvertex[1][4] = tex->t2;
-               tvertex[2][0] = org[0] + right[0] + up[0];
-               tvertex[2][1] = org[1] + right[1] + up[1];
-               tvertex[2][2] = org[2] + right[2] + up[2];
-               tvertex[2][3] = tex->s2;
-               tvertex[2][4] = tex->t2;
-               tvertex[3][0] = org[0] + right[0] - up[0];
-               tvertex[3][1] = org[1] + right[1] - up[1];
-               tvertex[3][2] = org[2] + right[2] - up[2];
-               tvertex[3][3] = tex->s2;
-               tvertex[3][4] = tex->t1;
+                       ds = (int) (DotProduct(impact, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3]) - surf->texturemins[0];
+                       dt = (int) (DotProduct(impact, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3]) - surf->texturemins[1];
 
-               // if the surface is transparent, render as transparent
-               m.transparent = !(surf->flags & SURF_CLIPSOLID);
-               m.ca = r->color[3] * exp(fogdensity/DotProduct(v,v));
+                       if (ds < 0 || dt < 0 || ds > surf->extents[0] || dt > surf->extents[1])
+                       {
+                               // this should never happen
+                               continue;
+                       }
 
-               if (m.ca >= (1.0f / 255.0f))
+                       tex = &particletexture[r->tex][1];
+                       VectorVectors(dir, right, up);
+                       VectorScale(right, r->scale, right);
+                       VectorScale(up, r->scale, up);
+                       tvertex[0][0] = org[0] - right[0] - up[0];
+                       tvertex[0][1] = org[1] - right[1] - up[1];
+                       tvertex[0][2] = org[2] - right[2] - up[2];
+                       tvertex[0][3] = tex->s1;
+                       tvertex[0][4] = tex->t1;
+                       tvertex[1][0] = org[0] - right[0] + up[0];
+                       tvertex[1][1] = org[1] - right[1] + up[1];
+                       tvertex[1][2] = org[2] - right[2] + up[2];
+                       tvertex[1][3] = tex->s1;
+                       tvertex[1][4] = tex->t2;
+                       tvertex[2][0] = org[0] + right[0] + up[0];
+                       tvertex[2][1] = org[1] + right[1] + up[1];
+                       tvertex[2][2] = org[2] + right[2] + up[2];
+                       tvertex[2][3] = tex->s2;
+                       tvertex[2][4] = tex->t2;
+                       tvertex[3][0] = org[0] + right[0] - up[0];
+                       tvertex[3][1] = org[1] + right[1] - up[1];
+                       tvertex[3][2] = org[2] + right[2] - up[2];
+                       tvertex[3][3] = tex->s2;
+                       tvertex[3][4] = tex->t1;
+
+                       // if the surface is transparent, render as transparent
+                       m.transparent = !(surf->flags & SURF_CLIPSOLID);
                        R_Mesh_Draw(&m);
+               }
        }
 }