[vtkusers] render large point cloud with variable color and size

[Ken Martin]

Yes it is, probably your best starting point (assuming a recent 7.0 or
later VTK with the new OpenGL backend) would be vtkPointGaussianMapper

https://gitlab.kitware.com/vtk/vtk/blob/master/Rendering/Core/vtkPointGaussianMapper.h

with examples (C++ sorry) here

https://gitlab.kitware.com/vtk/vtk/blob/master/Rendering/OpenGL2/Testing/Cxx/TestPointGaussianMapper.cxx

and here

https://gitlab.kitware.com/vtk/vtk/blob/master/Rendering/OpenGL2/Testing/Cxx/TestPointGaussianMapperOpacity.cxx

While it is called "Gaussian" it can do flat splats as well etc as you can
specify shader code for the splat.


On Tue, Mar 21, 2017 at 3:27 PM, Tudor Achim <tachim at cs.stanford.edu> wrote:

> Hi everyone,
> I have a quick basic usage question -- hope this is possible within VTK.
> Right now I've got a python module that can render a point cloud with 2.5m
> elements. What I'd like to do is add functionality to have per-point
> colors, per-point sizes, and a per-point selector so I can execute code
> based on which point is selected. I have searched the mailing list and the
> one thread about VTKPointCloud didn't seem to address the first two
> questions. Is it possible to do this in VTK?
>
> Thanks!
> Tudor
>
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Ken Martin PhD
Chairman & CFO
Kitware Inc.
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