Revision: 6839
http://playerstage.svn.sourceforge.net/playerstage/?rev=6839&view=rev
Author: alexcb
Date: 2008-07-10 15:32:48 -0700 (Thu, 10 Jul 2008)
Log Message:
-----------
optimized version of normalize
Modified Paths:
--------------
code/stage/trunk/libstage/stage.hh
Modified: code/stage/trunk/libstage/stage.hh
===================================================================
--- code/stage/trunk/libstage/stage.hh 2008-07-10 22:28:34 UTC (rev 6838)
+++ code/stage/trunk/libstage/stage.hh 2008-07-10 22:32:48 UTC (rev 6839)
@@ -170,7 +170,14 @@
/** Normalize an angle to within +/_ M_PI
*/
- inline double normalize( double a ){ return( atan2(sin(a), cos(a)));}
+ inline double normalize( double a )
+ {
+ //optimized version of return( atan2(sin(a), cos(a)));
+ while( a < -M_PI ) a += 2.0 * M_PI;
+ while( a > M_PI ) a -= 2.0 * M_PI;
+ return a;
+ }
+
/** take binary sign of a, either -1, or 1 if >= 0
*/
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