[Hgengine-cvs] SF.net SVN: hgengine:[545] Mercury2/src/MQuaternion.h

[<cn...@us...>]

Revision: 545
          http://hgengine.svn.sourceforge.net/hgengine/?rev=545&view=rev
Author:   cnlohr
Date:     2009-10-02 06:47:10 +0000 (Fri, 02 Oct 2009)

Log Message:
-----------
fix:  There is virtually no way to SSE-ize Quaternion math efficiently, except in place on large data sets.  We use quaternions in a much different way, so don't float_row it.

Modified Paths:
--------------
    Mercury2/src/MQuaternion.h

Modified: Mercury2/src/MQuaternion.h
===================================================================
--- Mercury2/src/MQuaternion.h	2009-09-28 22:37:27 UTC (rev 544)
+++ Mercury2/src/MQuaternion.h	2009-10-02 06:47:10 UTC (rev 545)
@@ -73,7 +73,10 @@
 		inline float& Z() { return m_wxyz[3]; }
 		
 //	private:
-		FloatRow m_wxyz;
+		//Tricky: This cannot be a float row, otherwise all references cease to operate as one would expect.
+		//Also, for most operations, it appeared to go slower.  All the moving in and out of these variables
+		//is disadvantagious.
+		float m_wxyz[4];
 } M_ALIGN(32);
 
 ///Produce a matrix out of a rotation x, then y then z (how Mercury does it)


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