[Bf-committers] Re: Re: [Bf-blender-cvs] CVS commit: blender/source/blender/python/api2_2x Mathutils.c

Martin Poirier theeth at yahoo.com
Mon Oct 10 21:50:41 CEST 2005

--- Brecht Van Lommel <brechtvanlommel at pandora.be>

> Exactly. There is a saacos ('safe acos') function in
> BLI_arithb.h just for this,
> and it's used all over the sources. acos should
> never be called directly.
> Brecht.

The "problem" is that saacos returns a single
precision float whereass python uses double precision
floats, so using acos directly has added precision
(even though the vector's data is in single


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