[ggt-checkins] SF.net SVN: ggt:[1282] trunk/gmtl/Containment.h

[<pat...@us...>]

Revision: 1282
          http://ggt.svn.sourceforge.net/ggt/?rev=1282&view=rev
Author:   patrickh
Date:     2012-10-26 21:30:13 +0000 (Fri, 26 Oct 2012)
Log Message:
-----------
Speed up isInVolume() for the Sphere/Point case.

Submitted by Paul Martz.

Modified Paths:
--------------
    trunk/gmtl/Containment.h

Modified: trunk/gmtl/Containment.h
===================================================================
--- trunk/gmtl/Containment.h	2012-10-26 21:24:52 UTC (rev 1281)
+++ trunk/gmtl/Containment.h	2012-10-26 21:30:13 UTC (rev 1282)
@@ -45,7 +45,8 @@
    // the sphere to the point has a magnitude less than or equal to the radius
    // of the sphere.
    // |pt - center| <= radius
-   return ( length(gmtl::Vec<DATA_TYPE,3>(pt - container.mCenter)) <= container.mRadius );
+   // Compare squares to avoid sqrt() call.
+   return ( lengthSquared(gmtl::Vec<DATA_TYPE,3>(pt - container.mCenter)) <= ( container.mRadius * container.mRadius ) );
 }
 
 /**

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