Hi -- a question came up in the Denver class regarding dynamic data in VBOs, and I had to admit I encountered this as well, and needed a solution. Here's the issue... If I enable VBOs in a Geometry, and dynamically modify the data each frame, the buffer object doesn't update unless I explicitly call dirty() on the modified Vec3Array. When I do this, the scene updates dynamically, yes, but: in a debugger, I see that the _entire_ block of array data is copied into the buffer object, not just the modified portion. Is there something I'm missing in the interface that would a) make it so the VBO will update without requiring an explicit dirty() call, and b) would allow just the modified portion to be copied (using, say, glMapBuffer, for example)? Thanks, Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> +1 303 859 9466
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