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What is the difference between the CGAL and the VTK libraries? Both incorporate a lot of the standard geometric algorithms. Can anyone list some application domains where the one is preferred over the other?
VTK is mostly targeted toward visualization (frontend). It includes some computational geometry functions out of convenience (e.g. Delaunay triangulation). It would be better suited for viewing MRI scans, visualizing large data sets, or converting point clouds / meshes from one format to another for example.
CGAL is targeted toward computational geometry (backend). It will require some type of frontend (e.g. OpenGL, VTK) to view the result. It would be better suited for molecular biology, astronomy, architectural design backends for example.