+// baseparms, parms, temps
+static void R_DecalSystem_SplatTriangle(decalsystem_t *decalsystem, float r, float g, float b, float a, float s1, float t1, float s2, float t2, int decalsequence, qboolean dynamic, float (*planes)[4], matrix4x4_t *projection, int triangleindex, int surfaceindex)
+{
+ int cornerindex;
+ int index;
+ float v[9][3];
+ const float *vertex3f;
+ int numpoints;
+ float points[2][9][3];
+ float temp[3];
+ float tc[9][2];
+ float f;
+ float c[9][4];
+ const int *e;
+
+ e = rsurface.modelelement3i + 3*triangleindex;
+
+ vertex3f = rsurface.modelvertex3f;
+
+ for (cornerindex = 0;cornerindex < 3;cornerindex++)
+ {
+ index = 3*e[cornerindex];
+ VectorCopy(vertex3f + index, v[cornerindex]);
+ }
+ // cull backfaces
+ //TriangleNormal(v[0], v[1], v[2], normal);
+ //if (DotProduct(normal, localnormal) < 0.0f)
+ // continue;
+ // clip by each of the box planes formed from the projection matrix
+ // if anything survives, we emit the decal
+ numpoints = PolygonF_Clip(3 , v[0] , planes[0][0], planes[0][1], planes[0][2], planes[0][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), points[1][0]);
+ if (numpoints < 3)
+ return;
+ numpoints = PolygonF_Clip(numpoints, points[1][0], planes[1][0], planes[1][1], planes[1][2], planes[1][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), points[0][0]);
+ if (numpoints < 3)
+ return;
+ numpoints = PolygonF_Clip(numpoints, points[0][0], planes[2][0], planes[2][1], planes[2][2], planes[2][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), points[1][0]);
+ if (numpoints < 3)
+ return;
+ numpoints = PolygonF_Clip(numpoints, points[1][0], planes[3][0], planes[3][1], planes[3][2], planes[3][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), points[0][0]);
+ if (numpoints < 3)
+ return;
+ numpoints = PolygonF_Clip(numpoints, points[0][0], planes[4][0], planes[4][1], planes[4][2], planes[4][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), points[1][0]);
+ if (numpoints < 3)
+ return;
+ numpoints = PolygonF_Clip(numpoints, points[1][0], planes[5][0], planes[5][1], planes[5][2], planes[5][3], 1.0f/64.0f, sizeof(points[0])/sizeof(points[0][0]), v[0]);
+ if (numpoints < 3)
+ return;
+ // some part of the triangle survived, so we have to accept it...
+ if (dynamic)
+ {
+ // dynamic always uses the original triangle
+ numpoints = 3;
+ for (cornerindex = 0;cornerindex < 3;cornerindex++)
+ {
+ index = 3*e[cornerindex];
+ VectorCopy(vertex3f + index, v[cornerindex]);
+ }
+ }
+ for (cornerindex = 0;cornerindex < numpoints;cornerindex++)
+ {
+ // convert vertex positions to texcoords
+ Matrix4x4_Transform(projection, v[cornerindex], temp);
+ tc[cornerindex][0] = (temp[1]+1.0f)*0.5f * (s2-s1) + s1;
+ tc[cornerindex][1] = (temp[2]+1.0f)*0.5f * (t2-t1) + t1;
+ // calculate distance fade from the projection origin
+ f = a * (1.0f-fabs(temp[0])) * cl_decals_newsystem_intensitymultiplier.value;
+ f = bound(0.0f, f, 1.0f);
+ c[cornerindex][0] = r * f;
+ c[cornerindex][1] = g * f;
+ c[cornerindex][2] = b * f;
+ c[cornerindex][3] = 1.0f;
+ //VectorMA(v[cornerindex], cl_decals_bias.value, localnormal, v[cornerindex]);
+ }
+ if (dynamic)
+ R_DecalSystem_SpawnTriangle(decalsystem, v[0], v[1], v[2], tc[0], tc[1], tc[2], c[0], c[1], c[2], triangleindex, surfaceindex, decalsequence);
+ else
+ for (cornerindex = 0;cornerindex < numpoints-2;cornerindex++)
+ R_DecalSystem_SpawnTriangle(decalsystem, v[0], v[cornerindex+1], v[cornerindex+2], tc[0], tc[cornerindex+1], tc[cornerindex+2], c[0], c[cornerindex+1], c[cornerindex+2], -1, surfaceindex, decalsequence);
+}