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Brecht Van Lommel 2bb9d5471e Fix for bug #5250: inaccurate conversion between edit and pose mode bones. ...

Using acos(dot(u, v)) to find the angle between two vectors is quite
inaccurate, and there's a better way to do it, as explained here:
http://www.plunk.org/~hatch/rightway.php

Also changed the use of atan for computing roll to atan2 in some places,
the latter avoids accuracy and division by zero issues.

2006-11-18 23:07:32 +00:00

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