The resulting polygon is shifted about libnfporb HOT 10 CLOSED

That is currently a limitation. libnfporb shifts the nfp into positive coordinate space. didn't think that might cause problems see #20. Let me see what i can do about it :)

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I think i fixed it in this branch: https://github.com/kallaballa/libnfporb/tree/issue30
Could you give it a try?

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could you open issue about the performance comments you had in your email? I can't at the moment answer gmail-emails

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thx!

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alright

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Still seems incorrect. Since the source polygons have central symmetry, obviously, their Minkowski difference also has to have central symmetry. I.e. the NFP's center should be where the green dot is.

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Dang... I'll look into it!

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I analyzed the situation and found out that the result of your test was correct from the beginning. Because illustrating in text seemed tedious I created a video that explains why the polygons aren't located around the green dot and are still valid

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Got it. I assumed that NFP is a Minkowski difference, which is true only if the reference point is at the coordinate (0, 0). Thank you for clarification. Nice video!

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:)

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