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diff --git a/engines/wintermute/Matrix4.cpp b/engines/wintermute/Matrix4.cpp
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+/*
+This file is part of WME Lite.
+http://dead-code.org/redir.php?target=wmelite
+
+Copyright (c) 2011 Jan Nedoma
+
+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.
+*/
+
+#include "engines/wintermute/Matrix4.h"
+#include "engines/wintermute/Vector2.h"
+#include <math.h>
+
+namespace WinterMute {
+
+//////////////////////////////////////////////////////////////////////////
+Matrix4::Matrix4() {
+	for (int i = 0; i < 4; i++) {
+		for (int j = 0; j < 4; j++) {
+			m[i][j] = 0.0f;
+		}
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+Matrix4::~Matrix4() {
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void Matrix4::Identity() {
+	for (int i = 0; i < 4; i++) {
+		for (int j = 0; j < 4; j++) {
+			m[i][j] = 0.0f;
+		}
+	}
+	m[0][0] = 1.0f;
+	m[1][1] = 1.0f;
+	m[2][2] = 1.0f;
+	m[3][3] = 1.0f;
+
+}
+
+//////////////////////////////////////////////////////////////////////////
+void Matrix4::RotationZ(float angle) {
+	Identity();
+
+	m[0][0] = cos(angle);
+	m[1][1] = cos(angle);
+	m[0][1] = sin(angle);
+	m[1][0] = -sin(angle);
+}
+
+//////////////////////////////////////////////////////////////////////////
+void Matrix4::TransformVector2(Vector2 &vec) {
+	float norm;
+
+	norm = m[0][3] * vec.x + m[1][3] * vec.y + m[3][3];
+
+	float x = (m[0][0] * vec.x + m[1][0] * vec.y + m[3][0]) / norm;
+	float y = (m[0][1] * vec.x + m[1][1] * vec.y + m[3][1]) / norm;
+
+	vec.x = x;
+	vec.y = y;
+}
+
+} // end of namespace WinterMute