andykorth/opentk — pull request #15 by Robmaister (2013-07-18 20:16:34+00:00)
Title: Implemented Quaternion.FromMatrix

I needed a matrix-to-quaternion conversion for parsing a model format, so I implemented it here.

The APIs I added:

- `Quaternion.FromMatrix()`
- `Quaterniond.FromMatrix()`