One way that comes to my mind is to iterate through cells, and use vertices coordinates to compute if the given coordinate of p, but the implementation is different for different cell types, and will need the correct continuous order of vertices of a cell. Is there any more convenient way? It surely…

There are functions such as compute_closest_entity that uses bounding box trees for fast searching. This works even if the point is not in any cell. There are other collision detection algorithms in DOLFIN/DOLFINx as well, but as you haven’t specified what version you are using I won’t go into det…

Oh, sorry, I am using Dolfin. What function could I use if I want precise judgement of whether a point is inside an element?

Given an coordinate of point p, how to define which cell it is in?

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dokken September 28, 2023, 6:47am 4

See; How to determine whether a point belongs to a mesh cell - #2 by dokken

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Given an coordinate of point p, how to define which cell it is in?

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