|
|
@@ -4882,13 +4882,17 @@ begin_decal(GeomNode *base_geom) {
|
|
|
nassertv(base_geom != (GeomNode *)NULL);
|
|
|
|
|
|
_decal_level++;
|
|
|
- nassertv(4*_decal_level < 16);
|
|
|
|
|
|
#ifndef DISABLE_POLYGON_OFFSET_DECALING
|
|
|
if (dx_decal_type == GDT_offset) {
|
|
|
-
|
|
|
#define POLYGON_OFFSET_MULTIPLIER 2
|
|
|
|
|
|
+ // note: zbias seems inconsitently supported. may be possible to fake it by
|
|
|
+ // adding (delta * element[4,3]) to element [3,3] of a regular matrix
|
|
|
+ // need to test this and see if to offers perf improvement over blend-based decaling
|
|
|
+
|
|
|
+ nassertv(POLYGON_OFFSET_MULTIPLIER*_decal_level < 16); // 16 is the max allowed zbias
|
|
|
+
|
|
|
// Just draw the base geometry normally.
|
|
|
base_geom->draw(this);
|
|
|
_d3dDevice->SetRenderState(D3DRENDERSTATE_ZBIAS, POLYGON_OFFSET_MULTIPLIER * _decal_level); // _decal_level better not be higher than 8!
|
cxgeorge