CheckOutwardNormals

版本 1.0.0 (2.5 KB) 作者: Darrel Robertson

Checks face/vertex list of closed triangulated objects to make sure all normals are outward facing.

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更新时间 2024/7/11

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Checks normals are outward facing and re-orders face if not.

Works with concave objects and with cavities. e.g. swiss cheese

Only works with triangular faces

Requirements: Function TriangleRayIntersection by Jarek Tuszynski

https://www.mathworks.com/matlabcentral/fileexchange/33073-triangle-ray-intersection

Input: faces, F (Nx3)

vertices, V (Nx3)

Output: corrected face list so all normals are outwards facing

list of any faces reordered

Assumptions: Normals are from clockwise orientation of faces. I.e. Right hand rule

Shape is closed and watertight.

No duplicate faces

Potential improvements: TriangleRayIntersection accepts multi-face, multi-ray input so should be able to speed up by removing the loop over the faces.

引用格式

Darrel Robertson (2024). CheckOutwardNormals (https://www.mathworks.com/matlabcentral/fileexchange/169468-checkoutwardnormals), MATLAB Central File Exchange. 检索来源 2024/7/27.