[vtkusers] drawing lines on curve surface

[Tao-Pak Chris Tsui]

Dear All vtk veterans

I have a 3D skull object made up of marching cubes...
what should I do if I want to draw irregular shape
polygon on the surface of the skull when I click on
it?  to make it clear, the line should be LYING on the
surface of the skull instead of intersecting the
curved surface with a straight line...

Thanks

Chris




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