Visibility map

[Ramtin Khosravi]

Dear all,

Where can I find an algorithm for constructing the visibility map
of a point lying on the surface of a 3D polyhedron (not a terrain)?
I would be thankful if someone tell me the running time of the best
algorithm known for the problem.

Please reply to raamtin at ce.sharif.ac.ir

Thanks
--Ramtin

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