Are your parts represented in two or three dimensions? If they're 3d meshes, you can use the same techniques as others have described, but you'll need to do polygon/line intersection instead of line/line intersection. Either way, if you're doing a lot of tests like this, you might want to build a BSP tree out of your data. BSP tree intersection tests are average-case logarithmic time, and by building the structure once you might save yourself some computation.

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In reply to Re: OT: point inside polyhedron test by FoxtrotUniform
in thread OT: point inside polyhedron test by stu96art

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