[petsc-users] orientation semantics for DMPlex

[Geoffrey Irving]

What are the orientation semantics of DMPlex?  I figured if I listed
the edges of each triangle in counterclockwise order it would come out
right, but it appears to be right for some triangles and wrong for
others.  Do I always have to call DMPlexSetConeOrientation?

Unfortunately, I haven't yet grasped the documentation for
DMPlexSetConeOrientation.

Thanks,
Geoffrey