implement clip planes in GLES polydata mapper
port code from the vtkOpenGLPolyDataMapper.cxx to the vtkOpenGLLowMemoryPolyDataMapper.cxx to enable clip plans for polydata mapper in GLES builds.
Edited by Jaswant Panchumarti (Kitware)
port code from the vtkOpenGLPolyDataMapper.cxx to the vtkOpenGLLowMemoryPolyDataMapper.cxx to enable clip plans for polydata mapper in GLES builds.