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2007-11-06 Tomas Frydrych <tf@o-hand.com>

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* clutter/clutter-fixed.h:
	Added CLUTTER_SQRTI_ARG_MAX, CLUTTER_SQRTI_5_PERCENT,
	CLUTTER_SQRTI_10_PERCENT expressing clutter_sqrti limits.
	Stripped trailing whitespace.

        * clutter/clutter-fixed.c:
	(clutter_sqrti):
	Updated documentation, stripped trailing whitespace.

        * clutter/clutter-behaviour-path.c:
	(node_distance):
	Use clib sqrt if clutter_sqrti() precission would be worse than
	10%.
	Stripped trailing whitespace.
This commit is contained in:
Tomas Frydrych
2007-11-06 15:46:23 +00:00
parent 9461dd216b
commit 3b07be19ba
4 changed files with 141 additions and 71 deletions
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4
clutter/clutter-fixed.c
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@ -608,7 +608,9 @@ clutter_sqrtx (ClutterFixed x)
*
* This function is about 10x faster than clib sqrt() on x86, and (this is
* not a typo!) more than 800x faster on ARM without FPU. It's error is < 5%
* for arguments < 132 and < 10% for arguments < 5591.
* for arguments < #CLUTTER_SQRTI_ARG_5_PERCENT and < 10% for arguments <
* #CLUTTER_SQRTI_ARG_10_PERCENT. The maximum argument that can be passed to
* this function is CLUTTER_SQRTI_ARG_MAX.
*
* Return value: integer square root.
*