How to Detect Inward-Facing Normals in a Band-Shaped Mesh? #4539
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Grantim
Gihong-Yim
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I want to know how to detect cases where, like in the mesh above, the band has normal vectors pointing inward.
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Answered by
Grantim
May 8, 2025
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Hello! This is actually quite tricky task in common case, but if you have single component and know that it is convex (or at least mostly convex), you can use volume calculation to determine if it is looking backwards: if volume is positive - than everything is OK, if volume is negative - than your normals are inverted and you may need to flip orientation. |
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Hello!
This is actually quite tricky task in common case, but if you have single component and know that it is convex (or at least mostly convex), you can use volume calculation to determine if it is looking backwards: if volume is positive - than everything is OK, if volume is negative - than your normals are inverted and you may need to flip orientation.