How to find elements of a 3d matrix inside a volume

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Ashli 2013-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/71472-how-to-find-elements-of-a-3d-matrix-inside-a-volume

Hi all, Does anyone has any idea how can I find the elements of a 3d matrix located inside a volume defined by boundary faces? any comment is appreciated,

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Answer 1

Sean de Wolski 2013-4-10

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编辑：Sean de Wolski 2013-9-19

Hi Ashli,

This utility will "voxelise" your mesh. Then you can use that image as a logical index into your 3d image:

http://www.mathworks.com/matlabcentral/fileexchange/27390-mesh-voxelisation

Also, on the off chance that all of your objects are convex, then there is an approach to this with vert2con() on the FEX that will quickly allow you to identify whether a voxel is inside the vertices.

More

http://www.mathworks.com/matlabcentral/fileexchange/37856-inpolyhedron-are-points-inside-a-triangulated-volume