On 12/2/2011 8:04 PM, michael.a.bo...@l-3com.com wrote:
My question is this, if I load a file using
osgDB::readNodeFile("somefile.osg");
How would I set it up for instanced drawing?
My guess is that I would need to write a node-visitor that collects all
of the geometry -> drawables and sets them up to use the instanced call
overload instead of the default. I have tried doing this, but my
implementation has gotten pretty complex, and I want to make sure there
isn't a more simple way I have overlooked.
Yes, you'd need to write a NodeVisitor. It would have an apply(Geode&) that
iterates over each Drawable. If the Drawable is a Geometry, the code would
further iterate over each PrimitiveSet and call setNumInstances() on each one.
It really just boils down to a pair of nested loops. This doesn't seem
particularly complex, so I wonder if you might be doing something different that
is complicating things. Your description of what you're doing is pretty vague,
so it's hard to tell.
-Paul
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