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diff --git a/src/base/Triangle.h b/src/base/Triangle.h
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+++ b/src/base/Triangle.h
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+//
+//  libavg - Media Playback Engine.
+//  Copyright (C) 2003-2014 Ulrich von Zadow
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+//  Current versions can be found at www.libavg.de
+//
+
+#ifndef _Triangle_H_
+#define _Triangle_H_
+
+#include "../api.h"
+
+#include "../glm/glm.hpp"
+
+#include <iostream>
+
+namespace avg {
+   
+struct AVG_API Triangle {
+public:
+    glm::vec2 p0;
+    glm::vec2 p1;
+    glm::vec2 p2;
+
+    Triangle(const glm::vec2& P0, const glm::vec2& P1, const glm::vec2& P2);
+    Triangle();
+    
+    bool operator ==(const Triangle & tri) const;
+    bool isInside(const glm::vec2& pt) const;
+    float getArea() const;
+    bool isClockwise() const;
+};
+
+std::ostream& operator<<(std::ostream& os, const Triangle& tri);
+
+}
+
+#endif