When OpenGL cannot be properly imported (when it is not installed at all or when it doesn't work for some reason), the import of the library will crash with a NotImplementedError
This fix catches this error and allows the library to be imported without crashing. OpenGL related functionality (MeshViewer) will not work but at least the Mesh class can be used. Many users might only need that functionality.
When OpenGL cannot be properly imported (when it is not installed at all or when it doesn't work for some reason), the import of the library will crash with a NotImplementedError
This fix catches this error and allows the library to be imported without crashing. OpenGL related functionality (MeshViewer) will not work but at least the Mesh class can be used. Many users might only need that functionality.