Move SF_TRIANGLES plane calculation to map loading

Author: VReaperV

src/engine/renderer/tr_bsp.cpp

@@ -1080,6 +1080,15 @@ static void ParseTriSurf( dsurface_t* ds, drawVert_t* verts, bspSurface_t* surf,
 
 	srfGeneric_t* surface = ( srfGeneric_t* ) surf->data;
 	surface->surfaceType = surfaceType_t::SF_TRIANGLES;
+
+	plane_t plane;
+	srfVert_t* v1 = surface->verts + surface->triangles[0].indexes[0];
+	srfVert_t* v2 = surface->verts + surface->triangles[0].indexes[1];
+	srfVert_t* v3 = surface->verts + surface->triangles[0].indexes[2];
+
+	PlaneFromPoints( plane, v1->xyz, v2->xyz, v3->xyz );
+	VectorCopy( plane.normal, surface->plane.normal );
+	surface->plane.dist = plane.dist;
 }
 
 static void ParseMesh( dsurface_t *ds, drawVert_t *verts, bspSurface_t *surf )

src/engine/renderer/tr_main.cpp

@@ -1205,7 +1205,6 @@ R_PlaneForSurface
 */
 void R_PlaneForSurface( surfaceType_t *surfType, cplane_t *plane ) {
 	srfPoly_t *poly;
-	srfVert_t *v1, *v2, *v3;
 
 	if ( !surfType )
 	{
@@ -1218,19 +1217,9 @@ void R_PlaneForSurface( surfaceType_t *surfType, cplane_t *plane ) {
 	switch ( *surfType )
 	{
 		case surfaceType_t::SF_FACE:
-		{
-			*plane = ( ( srfSurfaceFace_t* ) surfType )->plane;
-			return;
-		}
 		case surfaceType_t::SF_TRIANGLES:
 		{
-			srfGeneric_t* tri = ( srfGeneric_t* ) surfType;
-			v1 = tri->verts + tri->triangles[0].indexes[0];
-			v2 = tri->verts + tri->triangles[0].indexes[1];
-			v3 = tri->verts + tri->triangles[0].indexes[2];
-			PlaneFromPoints( plane4, v1->xyz, v2->xyz, v3->xyz );
-			VectorCopy( plane4.normal, plane->normal );
-			plane->dist = plane4.dist;
+			*plane = ( ( srfSurfaceFace_t* ) surfType )->plane;
 			return;
 		}
 		case surfaceType_t::SF_POLY: