Normal repair

[czc98]

Hi!
I have a closed triangular mesh, but some faces on the model have reversed normals. Is there a relatively simple method in meshlib to detect the reversed faces?

[Fedr]

Hi,

MeshLib's representation of meshes requires consistent orientation of neighbor faces (both must have normals in same direction). So most probably, you will not be able to load your mesh without some losses in such triangles.

If you can attached some example, we will look at it.

[czc98]

af3cea55-86ea-4348-8566-1b54693ae2a5.zip

[Fedr]

Thanks.

When such file is open in MeshInspector, one will see

So all vertices along the boundary among inconsistently oriented triangles are duplicated, and a boundary appears among such areas:

To fix such mesh, please

1. Manually Flip root component by picking it by mouse:
   

2. Then Unite Close Vertices to stitch the boundaries:
   

Does it work for you?