The QuadTreeBuilder class was completely revamped as a templated class
to support flexible creation of scene graph quad trees, and a major
bug was fixed as well. Now it actually generates quadtrees instead of
some weird striped thing.
One StateSet is shared among all the "forests." The trees are drawn
after normal terrain objects to minimize some of the transparency
related artifacts.
Lighting was implemented in the ShaderGeometry shader (for both
polygon sides). Ambient-diffuse values for trees are hard-coded in
TreeBin.cxx.
DotOsg wrappers were added for ShaderGeometry so it can be output in
the scene graph dump.
In addition to Stuart's changes, there's an independent quad tree
builder class for constructing loose quad trees from scene graph nodes.
Stuart also implemented changes to the random number generator suggested by
Andy Ross.
Move point lights to render bin 8, clouds to render bin 9. Turn on
AlphaFunc for cloud layers.
Create a StateAttributeFactory object to create and share common state
objects.
Do away with the switch in each terrain tile for the ground lights. They are
turned on by node masks now.
Share state sets among all the light nodes and manage the fog values through a
"GroundLightManager" instead of having separate state sets and callback
functions for each group in each tile.
Create the local path in the right order in OptionsPusher. When
OptionsPusher is used, put it inside a new code block so the order of
destruction with respect to the mutex on reader functions id clear.
Add #include <algorithm> to top of ModelRegistry.cxx.
Change include syntax in PathOptions.cxx
The OSG reader plugins overwrite the path list passed in options with the local
directory of the file being read, forcing you to set the path list in
the Registry. I think this a bug, but in the meantime here's a workaround.
To set a path when loading model files, use an osg ReaderWriter::Options object.
Put locks in ModelRegistry::readNode and ModelRegistry::readImage to avoid
conflicts when files are loaded from both the pager and the main thread.
For the alpha-test animation, use an OVERRIDE attribute on the state
set of the top level node instead of copying drawables and state sets
throughout the model.
As a temporary hack in the blend animation, don't use display lists in
the cloned drawables.
These changes are aimed at cutting down the number of display lists
that the pager needs to compile.
In a big effort to improve use of the object cache, provide a
ModelRegistryCallback template class with different policies for
substitution, caching, optimization, etc.
Change SGTexDataVarianceVistor to make StateSets static too.
