Rename short aliases for imported packages to conform to pep8.
Rename short aliases for imported packages to conform to pep8.
Rename short aliases for imported packages to conform to pep8.
Rename short aliases for imported packages to conform to pep8.
Rename files.
Extract tests for class Triangle into Triangle3d_tests.py.
Extract tests for class Triangle into Triangle3d_tests.py.
Extract tests for class Plane into Plane3D_tests.py.