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[SLIMDX] Meshes into a vertex buffer ?

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Hi, fairly new at this, and need some advice. I'm writing a CAD type program in VB.NET using DX9 and SLIMDX using only Fixed Pipeline functions.

All going well, and displaying around 1,000,000 primitives fairly smoothly. However.

One part which is killing performance is displaying 20-30,000 different sized spheres using the Mesh.DrawSubset command in a loop to transform a common mesh and position copies around the 3D world, every frame

Can I load these into a static vertex buffer, or maybe create triangle primitives from the mesh to do the same? How? Thanks in advance for any pointers

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