1 files changed, 56 insertions, 0 deletions
diff --git a/src/base/BezierCurve.cpp b/src/base/BezierCurve.cpp
new file mode 100644
index 0000000..7e5fb8e
--- /dev/null
+++ b/src/base/BezierCurve.cpp
@@ -0,0 +1,56 @@
+//
+//  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
+//
+
+#include "BezierCurve.h"
+
+#include "GLMHelper.h"
+
+#include <iostream>
+
+using namespace std;
+
+namespace avg {
+
+BezierCurve::BezierCurve(const glm::vec2& p0, const glm::vec2& p1, const glm::vec2& p2, 
+        const glm::vec2& p3)
+    : m_P0(p0),
+      m_P1(p1),
+      m_P2(p2),
+      m_P3(p3)
+{
+}
+
+glm::vec2 BezierCurve::interpolate(float t) const
+{
+    return (1.f-t)*(1.f-t)*(1.f-t)*m_P0+
+           3.f*t*(1.f-t)*(1.f-t)  *m_P1+
+           3.f*t*t*(1.f-t)        *m_P2+
+           t*t*t                  *m_P3;
+}
+
+glm::vec2 BezierCurve::getDeriv(float t) const
+{
+    return 3.f*(m_P1-m_P0)*(1.f-t)*(1.f-t)+
+           6.f*(m_P2-m_P1)*(1.f-t)*t+ 
+           3.f*(m_P3-m_P2)*t*t;
+}
+
+}