openwebwork/pg-dev — pull request #34 by dpvc (2013-02-14 16:48:45+00:00)
Title: New macro file for parametric planes in 3D

This provides a `ParameticPlane()` function similar to the `ParametricLine()` one available in `parserParametricLine()`. This handles parametric planes in 3D only, at the moment (since it used cross products in testing for equality).