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This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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I would like to display arrows on a closed surface mesh. Given that the the arrows may point inside and outside the surface, I can see the arrows pointing outside the surface using vtkGlyph3D and vtkArrowSource. However, the arrows pointing inside is not visable. How can I pull out the arrows pointing inside?

Is there any function by which I can chang the role between the start point and end point of an arrow? This is the same as changing the direction of the arrow, and let the head of the arrow locate at the vertex. While for arrows pointing outside the mesh, I want to keep the arrows pointing outward sticking to the vertex.