Negative Tetraheder Volumes in vtkMeshQuality
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Similar to my previously reported bug, the vtkMeshQuality filter uses a formular that may produce negative volumes for Tetrahedra.
vtkMeshQuality does not use the vtkTetra::ComputeVolume() method, but rather the v_tet_vol() from verdict.
As before, the issue is resolved by adding an fabs(), see attached file with fix in line 1394