82847ebbaf
This change prevents fatal errors occurring during programmatic construction of a plane object. If an invalid plane is constructed then this can be tested for using a new plane::valid() method. Errors are still generated from dictionary construction as before, and they have been improved to better identify where in the file the erroneous specification is. This change fixes some issues associated with meshToMesh mapping. The cell overlap calculation now detects and skips over degenerate tetrahedra. Previously, it was generating errors as it tried to construct planes from the faces of these degenerate tetrahedra.
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About OpenFOAM
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