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[jiju peethambaran <>]

You may use locate() function available in Triangulation_2...
something like....
If(is_equal(face_handle a, dt.locate(point query, face_handle)))--- where
'a'  is the given triangle and query is your point. It checks whether the
face returned by the locate() is same as 'a' or not. If both are same, your
query point lies in the given triangle...I don't know whether there exist
any other direct method for this...



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