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I have many .ply files.

With some reasons, some of their normal orientations are pointing outside of the object(which is what I want) and some of them are pointing inside the object.

enter image description here

Does Meshlabserver has a function that can detect the normal orientation of a .ply file, and another function that can unify all the normal to a specific orientation?

By the way, since I am new to 3D ojects, I would like to know what factor determines the normal orientation? Hope someone willing to answer my question.

Thanks.

APU
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  • I'm having the same problem... photos are of archaeological excavations (foundations and the like), so I'm taking pictures down into a pit to map the stonework foundations. Camera orientations are correct, but color/image information is on the opposite (outside) surface of the convex feature? Have you tried _Filters -> Camera -> Re-orient vertex normals using cameras_? That seems to (sometimes) work. I haven't figured out the specifics of it yet, though. – JSCard Jun 13 '17 at 14:02

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