altoslib: Clean up quaternion and rotation interfaces
authorKeith Packard <keithp@keithp.com>
Thu, 22 Jun 2017 17:10:06 +0000 (10:10 -0700)
committerKeith Packard <keithp@keithp.com>
Thu, 22 Jun 2017 17:10:06 +0000 (10:10 -0700)
Export euler to quaternion (instead of half_euler).
Provide angles to rotate rather than rates and time.
Add comments to quaternion and rotation code.

Signed-off-by: Keith Packard <keithp@keithp.com>

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