[vtkusers] vtkOpenGLPolyDataMapper, custom shaders and line width property

[Neher, Peter]

Hi everyone,


I am trying to render a polydata in a QVTKOpenGLWidget with thick lines (actor property line width) in conjunction with my own shader code. Since we switched from QVTKWidget to QVTKOpenGLWidget this results in black lines (no color and/or lighting). Everything works fine if the line with is 1.0. For line width > 1.0, the shader seems to do nothing.


Shader code is attached, as well as two images of depicting the issue.


Any help is much appreciated!


Peter
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