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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2009 Valentin Milea
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+#import "TransformUtils.h"
+
+void CGAffineToGL(const CGAffineTransform *t, GLfloat *m)
+{
+        // | m[0] m[4] m[8]  m[12] |     | m11 m21 m31 m41 |     | a c 0 tx |
+        // | m[1] m[5] m[9]  m[13] |     | m12 m22 m32 m42 |     | b d 0 ty |
+        // | m[2] m[6] m[10] m[14] | <=> | m13 m23 m33 m43 | <=> | 0 0 1  0 |
+        // | m[3] m[7] m[11] m[15] |     | m14 m24 m34 m44 |     | 0 0 0  1 |
+        
+        m[2] = m[3] = m[6] = m[7] = m[8] = m[9] = m[11] = m[14] = 0.0f;
+        m[10] = m[15] = 1.0f;
+        m[0] = t->a; m[4] = t->c; m[12] = t->tx;
+        m[1] = t->b; m[5] = t->d; m[13] = t->ty;
+}
+
+void GLToCGAffine(const GLfloat *m, CGAffineTransform *t)
+{
+        t->a = m[0]; t->c = m[4]; t->tx = m[12];
+        t->b = m[1]; t->d = m[5]; t->ty = m[13];
+}