Rotate a mesh to align its surface to that of another mesh

Asked Aug 12 '20 at 08:13

Active Aug 12 '20 at 08:25

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I have two meshes which I want to align. I need to put the (bottom surface of the) cylinder on top of the box as shown. I got the normal vectors of both surfaces (v1,v2).

How do I calculate the needed rotation for the cylinders surface to face the exact opposite direction of the top of the box?

I'm grateful for any advice. Thanks in advance

edited Aug 12 '20 at 08:25

asked Aug 12 '20 at 08:13

Apbln

[Matrix method](https://math.stackexchange.com/questions/180418/calculate-rotation-matrix-to-align-vector-a-to-vector-b-in-3d). [Quaternion method](https://stackoverflow.com/questions/1171849/finding-quaternion-representing-the-rotation-from-one-vector-to-another) (easier). – meowgoesthedog Aug 12 '20 at 09:40
see [Problem superimposing and aligning 3D triangles](https://stackoverflow.com/a/52163563/2521214) – Spektre Aug 13 '20 at 08:09

Rotate a mesh to align its surface to that of another mesh

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