[vtkusers] Draw thousands of different size and color 3D rectangles several times per second

[Mwoua]

It looks good, however, I dont really understand yet how scaling works and I
want all my rectangles to have different size and color so I'm still trying
things up.

Currently im using a vtkPolyData holding vtkCellArray and vtkCellArray to
draw 2D rectangle and try the color scaling.


Bill Lorensen wrote
> Use vtkGlyph3D to efficiently render glyphs of your choice.
> Type
> site:vtk.org/Wiki/VTK/Examples vtkGlyph3D
> into google to see how to use it.
> 
> Also, the most recent VTK has a number of point cloud processing. See:
> http://www.vtk.org/Wiki/VTK/Examples/Cxx#Point_cloud_operations





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