inpolygon equivalent function in 3D?

Question

Pinpress 2012-5-4

2
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https://ww2.mathworks.cn/matlabcentral/answers/37444-inpolygon-equivalent-function-in-3d

Hi,

I need to find a way to determine if a large number of points are inside a closed polygon expressed by either a triangular or quadrilateral mesh in 3D. I know in 2D, there's a matlab function "inpolygon". Is there an equivalent method/function in 3D?

Thanks!

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Answer 1

Pinpress 2012-5-7

2
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https://ww2.mathworks.cn/matlabcentral/answers/37444-inpolygon-equivalent-function-in-3d#answer_46975

Thanks for the tip. However, I don't think that's a good solution. I believe it tries to generate a convex hull using delaunayn. However, the closed surface I have is not necessarily a convex hull (arbitrary shape).