/*
* @brief
*/
static void BuildPatch(int32_t fn, winding_t *w) {
patch_t *patch;
d_bsp_plane_t *plane;
patch = (patch_t *) Mem_Malloc(sizeof(*patch));
face_patches[fn] = patch;
patch->face = &d_bsp.faces[fn];
patch->winding = w;
// resolve the normal
plane = &d_bsp.planes[patch->face->plane_num];
if (patch->face->side)
VectorNegate(plane->normal, patch->normal);
else
VectorCopy(plane->normal, patch->normal);
WindingCenter(w, patch->origin);
// nudge the origin out along the normal
VectorMA(patch->origin, 2.0, patch->normal, patch->origin);
patch->area = WindingArea(w);
if (patch->area < 1.0) // clamp area
patch->area = 1.0;
EmissiveLight(patch); // surface light
}
/**
* @brief Build a patch for a surface that emits light
* @note This is called in the lighting stage
* @param fn The face number of the surface that emits the light
* @param w The winding
* @sa BuildLights
*/
static void BuildPatch (int fn, winding_t* w)
{
patch_t* patch;
dBspPlane_t* plane;
patch = Mem_AllocType(patch_t);
face_patches[fn] = patch;
patch->face = &curTile->faces[fn];
patch->winding = w;
/* resolve the normal */
plane = &curTile->planes[patch->face->planenum];
if (patch->face->side)
VectorNegate(plane->normal, patch->normal);
else
VectorCopy(plane->normal, patch->normal);
WindingCenter(w, patch->origin);
/* nudge the origin out along the normal */
VectorMA(patch->origin, 2.0, patch->normal, patch->origin);
patch->area = WindingArea(w);
if (patch->area < 1.0) /* clamp area */
patch->area = 1.0;
EmissiveLight(patch); /* surface light */
}
