Fix orientation for triangles after Delaunay2D filter

ParaView Support
1

I have a pipeline which consist on a Delaunay2D filter followed by an ExtractSurface. After this, I save the mesh as an obj. I have tried to load it in CGAL and it reports each time different number of faces, until I have realised that the orientation for the faces generated by my paraview pipeline is not consistent.

coarseobj = WavefrontOBJReader(registrationName='coarse.obj', FileName='coarse.obj')
delaunay2D1 = Delaunay2D(registrationName='Delaunay2D1', Input=coarseobj)
extractSurface1 = ExtractSurface(registrationName='ExtractSurface1', Input=delaunay2D1)
SaveData('coarse.obj', proxy=extractSurface1)

How can I fix the orientation of my triangles after this pipeline?

2

Hello,

To adjust the normal direction of the triangles, you can apply the Generate Surface Normals filter to extractSurface1 with the Consistency option turned on.