[vtkusers] About static particle system visualization

[Alfredo Metere]

Hi,

I am DESPERATE trying to implement impostor graphic rendering of spheres 
in VTK using GLSL.

Here's the workflow that I use to render the particle positions:
1 - CSV file -> vtkPoints
2 - vtkPoints -> vtkPolyData
3 - vtkPolyData -> vtkGlyph3D
4 - vtkGlyph3D -> SetSource -> vtkPlaneSource
5 - vtkGlyph3D -> vtkPolyDataMapper
6 - vtkPolyDataMapper -> vtkActor
7 - vtkActor -> vtkProperty -> Load Material File in XML
8 - vtkActor -> ShaderOn()
9 - vtkRenderer - > AddActor
10 - vtkRenderer -> SetActiveCamera

Big Problem:
I've tried to write a vertex shader in order to keep the quads aligned 
to the view without ANY success.
This very vertex shader works great in RenderMonkey and other Shader 
compilers with no problem. I've no idea why it is not working.

Is there a way to use OpenGL point sprites instead?

Thanks in advance

-- 
PhD Candidate
Stockholm University, Sweden

Postal Address:
     Alfredo Metere
     c/o Arrhenius Laboratoriet (MMK)
     Svante Arrhenius Väg. 16C
     10691 - Stockholm
     Sweden