Geometry Shader Implementation

Tharun · June 21, 2019, 8:42am

Can someone please guide me on how to inject Geometry Shader Code?

Michael · June 21, 2019, 11:17am

Hi,
In VTK 8: vtkOpenGLPolyDataMapper::AddShaderReplacement
In VTK 9 (and current master): vtkShaderProperty::AddGeometryShaderReplacement

dmreagan · July 1, 2019, 5:01pm

I found that AddShaderReplacement didn’t work from Python for geometry shaders, so I have used vtkOpenGLPolyDataMapper::SetGeometryShaderCode.

You can see a simple example here that takes in a cube and replaces each vertex with a pyramid. The example uses the FURY library, but the shader part is raw VTK.