Hmm... I suppose that topic name can be taken a couple different ways ;-)
I've been trying to trace PrimitiveSet::dirty() and figured it would be safer
to just ask...
1) If I change a vertex position of a Primitive, does calling
PrimitiveSet::dirty() yield
the same eventual results as calling the parent Geometry's
dirtyDisplayList() or
is it a different beast altogether?
I cannot easily see if changing the _vboList's _modifiedCount causes the
vertex change to be reflected into OGL. Not sure if changing a vertex
position
requires PrimitiveSet::dirty, Geometry::dirtyDisplayList, or both to be
done right.
2) Is it safe to assume that if changing a vertex color, texture coordinate, or
normal requires only a display list dirtying, but if changing the vertex
position,
that a dirtyBound should also be called?
Note that I'm talking about occasional modifications, not "dynamic geometry"
that would warrant turning off the display lists. I'm writing a wrapper that
accepts
changes to vertices and am trying to make only the necessary dirty() calls.
Thanks,
Bill
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