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Boolean function that is 1 inside a geometric entity and 0 outside

Posted Feb 27, 2021, 3:15 p.m. EST General, Geometry 1 Reply

Logan Bishop-Van Horn
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Does anyone know if there is a boolean function that is 1 inside a geometric entity and 0 outside which can be used in variable/expression definitions? I am looking for something like

inside_geom(x, y, z, geom) -> 1 if (x, y, z) is located inside geom, 0 otherwise

1 Reply Last Post Mar 1, 2021, 5:18 a.m. EST
Henrik Sönnerlind COMSOL Employee

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Posted: 3 years ago Mar 1, 2021, 5:18 a.m. EST

If you mean 'inside a geometric entity' as in 'located inside domain 17', then you can use the expression dom == 17. What 'dom' means depends on the context, so it can be a domain, boundary, or edge.

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Henrik Sönnerlind
COMSOL
If you mean 'inside a geometric entity' as in 'located inside domain 17', then you can use the expression dom == 17. What 'dom' means depends on the context, so it can be a domain, boundary, or edge.

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