[Hgengine-cvs] SF.net SVN: hgengine:[297] Mercury2/src/Camera.cpp

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

Revision: 297
          http://hgengine.svn.sourceforge.net/hgengine/?rev=297&view=rev
Author:   cnlohr
Date:     2009-05-31 21:38:26 +0000 (Sun, 31 May 2009)

Log Message:
-----------
add info for user

Modified Paths:
--------------
    Mercury2/src/Camera.cpp

Modified: Mercury2/src/Camera.cpp
===================================================================
--- Mercury2/src/Camera.cpp	2009-05-31 21:07:59 UTC (rev 296)
+++ Mercury2/src/Camera.cpp	2009-05-31 21:38:26 UTC (rev 297)
@@ -49,6 +49,12 @@
 		m_y += m->dy/1200.0f;
 		m_x += m->dx/1200.0f;
 
+		//keep m_y within [-PI -> PI]
+		if( m_y < -Q_PI ) m_y += Q_PI*2.;
+		if( m_y > Q_PI )  m_y -= Q_PI*2.;
+
+		//if m_y is < -PI/2 or m_y > PI/2 one must invert the axes
+
 		MQuaternion qLeftRight = MQuaternion::CreateFromAxisAngle(MercuryVector(0,1,0), m_x);
 		MercuryVector LocalLookAt = MercuryVector( 1, 0, 0 );
 		LocalLookAt = LocalLookAt.Rotate( qLeftRight );


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