[ZooLib-checkins] SF.net SVN: zoolib:[2604] trunk/zoolib/source/cxx/more/zoolib/gameengine/ ZGameEngine_Geometry.h

[<ag...@us...>]

Revision: 2604
          http://zoolib.svn.sourceforge.net/zoolib/?rev=2604&view=rev
Author:   agreen
Date:     2011-11-09 17:14:49 +0000 (Wed, 09 Nov 2011)
Log Message:
-----------
Add sShear.

Modified Paths:
--------------
    trunk/zoolib/source/cxx/more/zoolib/gameengine/ZGameEngine_Geometry.h

Modified: trunk/zoolib/source/cxx/more/zoolib/gameengine/ZGameEngine_Geometry.h
===================================================================
--- trunk/zoolib/source/cxx/more/zoolib/gameengine/ZGameEngine_Geometry.h	2011-10-31 20:28:34 UTC (rev 2603)
+++ trunk/zoolib/source/cxx/more/zoolib/gameengine/ZGameEngine_Geometry.h	2011-11-09 17:14:49 UTC (rev 2604)
@@ -203,8 +203,8 @@
 template <class Val>
 ZMatrix<Val,4,4> sRotateX(Val radians)
 	{
-	Val s = sin(radians);
-	Val c = cos(radians);
+	const Val s = sin(radians);
+	const Val c = cos(radians);
 	ZMatrix<Val,4,4> result;
 	result.fE[0][0] = 1;
 	result.fE[1][1] = c;
@@ -222,8 +222,8 @@
 template <class Val>
 ZMatrix<Val,4,4> sRotateY(Val radians)
 	{
-	Val s = sin(radians);
-	Val c = cos(radians);
+	const Val s = sin(radians);
+	const Val c = cos(radians);
 	ZMatrix<Val,4,4> result;
 	result.fE[0][0] = c;
 	result.fE[1][1] = 1;
@@ -241,8 +241,8 @@
 template <class Val>
 ZMatrix<Val,4,4> sRotateZ(Val radians)
 	{
-	Val s = sin(radians);
-	Val c = cos(radians);
+	const Val s = sin(radians);
+	const Val c = cos(radians);
 	ZMatrix<Val,4,4> result;
 	result.fE[0][0] = c;
 	result.fE[0][1] = s;
@@ -253,6 +253,36 @@
 	return result;
 	}
 
+// =================================================================================================
+#pragma mark -
+#pragma mark * sShear
+
+template <class Val>
+ZMatrix<Val,4,4> sShear(Val xy, Val xz, Val yx, Val yz, Val zx, Val zy)
+	{
+	ZMatrix<Val,4,4> result(null);
+	result.fE[0][0] = 1;
+	result.fE[0][1] = xy;
+	result.fE[0][2] = xz;
+	result.fE[0][3] = 0;
+
+	result.fE[1][0] = yx;
+	result.fE[1][1] = 1;
+	result.fE[1][2] = yz;
+	result.fE[1][3] = 0;
+
+	result.fE[2][0] = zx;
+	result.fE[2][1] = zy;
+	result.fE[2][2] = 1;
+	result.fE[2][3] = 0;
+
+	result.fE[3][0] = 0;
+	result.fE[3][1] = 0;
+	result.fE[3][2] = 0;
+	result.fE[3][3] = 1;
+	return result;
+	}
+
 } // namespace ZGameEngine
 } // namespace ZooLib
 

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