RUNWAYLIGHTS_BIT = (1 << 10),
LIGHTS_BITS = (GROUNDLIGHTS0_BIT | GROUNDLIGHTS1_BIT | GROUNDLIGHTS2_BIT
| RUNWAYLIGHTS_BIT),
- BACKGROUND_BIT = (1 << 11)
+ // Sky parts
+ BACKGROUND_BIT = (1 << 11),
+ // Everything else that isn't terrain. Initially for clouds;
+ // eventually for other models?
+ MODEL_BIT = (1 << 12)
};
// Theory of bin numbering:
//
// Normal opaque objects are assigned bin 0.
//
+// Random objects like trees may have transparency, but there are too
+// many to depth sort individually. By drawing them after the terrain
+// we can at least keep the sky under the ground from poking through.
+//
// Point lights blend with the terrain to simulate attenuation but
// should completely obscure any transparent geometry behind
// them. Also, they should be visible through semi-transparent cloud
// OSG and its file loaders throw all transparent objects into bin 10.
enum RenderBin {
+ RANDOM_OBJECTS_BIN = 2,
POINT_LIGHTS_BIN = 8,
CLOUDS_BIN = 9,
TRANSPARENT_BIN = 10 // assigned by OSG