//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
void AAS_MergePlaneFaces(tmp_area_t *tmparea, int planenum)
{
tmp_face_t *face1, *face2, *nextface2;
winding_t *neww;
int side1, side2;
for (face1 = tmparea->tmpfaces; face1; face1 = face1->next[side1])
{
side1 = face1->frontarea != tmparea;
if (face1->planenum != planenum) continue;
//
for (face2 = face1->next[side1]; face2; face2 = nextface2)
{
side2 = face2->frontarea != tmparea;
nextface2 = face2->next[side2];
//
if ((face2->planenum & ~1) != (planenum & ~1)) continue;
//
neww = MergeWindings(face1->winding, face2->winding,
mapplanes[face1->planenum].normal);
FreeWinding(face1->winding);
face1->winding = neww;
if (face2->frontarea) AAS_RemoveFaceFromArea(face2, face2->frontarea);
if (face2->backarea) AAS_RemoveFaceFromArea(face2, face2->backarea);
AAS_FreeTmpFace(face2);
//
nextface2 = face1->next[side1];
} //end for
} //end for
} //end of the function AAS_MergePlaneFaces
//===========================================================================
//
// Parameter: -
// Returns: -
// Changes Globals: -
//===========================================================================
int AAS_TryMergeFaces( tmp_face_t *face1, tmp_face_t *face2 ) {
winding_t *neww;
#ifdef DEBUG
if ( !face1->winding ) {
Error( "face1 %d without winding", face1->num );
}
if ( !face2->winding ) {
Error( "face2 %d without winding", face2->num );
}
#endif //DEBUG
//
if ( face1->faceflags != face2->faceflags ) {
return false;
}
//NOTE: if the front or back area is zero this doesn't mean there's
//a real area. It means there's solid at that side of the face
//if both faces have the same front area
if ( face1->frontarea == face2->frontarea ) {
//if both faces have the same back area
if ( face1->backarea == face2->backarea ) {
//if the faces are in the same plane
if ( face1->planenum == face2->planenum ) {
//if they have both a front and a back area (no solid on either side)
if ( face1->frontarea && face1->backarea ) {
neww = MergeWindings( face1->winding, face2->winding,
mapplanes[face1->planenum].normal );
} //end if
else
{
//this function is to be found in l_poly.c
neww = TryMergeWinding( face1->winding, face2->winding,
mapplanes[face1->planenum].normal );
} //end else
if ( neww ) {
FreeWinding( face1->winding );
face1->winding = neww;
if ( face2->frontarea ) {
AAS_RemoveFaceFromArea( face2, face2->frontarea );
}
if ( face2->backarea ) {
AAS_RemoveFaceFromArea( face2, face2->backarea );
}
AAS_FreeTmpFace( face2 );
return true;
} //end if
} //end if
else if ( ( face1->planenum & ~1 ) == ( face2->planenum & ~1 ) ) {
Log_Write( "face %d and %d, same front and back area but flipped planes\r\n",
face1->num, face2->num );
} //end if
} //end if
} //end if
return false;
} //end of the function AAS_TryMergeFaces
