Remove using std:: from the metar header, remove HTTP support, add very basic unit...

[simgear.git] / simgear / scene / util / RenderConstants.hxx

diff --git a/simgear/scene/util/RenderConstants.hxx b/simgear/scene/util/RenderConstants.hxx
index 91ff7721aacebc5383d140a472e5d2dabc0f5da3..477e41621fe9b4d7e4512ea144fd82f228ef8015 100644 (file)
--- a/simgear/scene/util/RenderConstants.hxx
+++ b/simgear/scene/util/RenderConstants.hxx
@@ -31,8 +31,45 @@ enum NodeMask {
     RECEIVESHADOW_BIT = (1 << 3),
     GUI_BIT = (1 << 4),
     PANEL2D_BIT = (1 << 5),
-    PICK_BIT = (1 << 6)
+    PICK_BIT = (1 << 6),
     // Different classes of lights turned on by node masks
+    GROUNDLIGHTS0_BIT = (1 << 7),
+    GROUNDLIGHTS1_BIT = (1 << 8),
+    GROUNDLIGHTS2_BIT = (1 << 9),
+    RUNWAYLIGHTS_BIT = (1 << 10),
+    LIGHTS_BITS = (GROUNDLIGHTS0_BIT | GROUNDLIGHTS1_BIT | GROUNDLIGHTS2_BIT
+                   | RUNWAYLIGHTS_BIT),
+    // 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
+// layers, so they are rendered before the cloud layers.
+//
+// Clouds layers can't be depth sorted because they are too big, so
+// they are rendered before other transparent objects. The layer
+// partial ordering is handled in the clouds code.
+//
+// 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
 };
 }
 #endif