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+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2013 Laurent Gomila (laurent.gom@gmail.com)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+// you must not claim that you wrote the original software.
+// If you use this software in a product, an acknowledgment
+// in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+// and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Graphics/CircleShape.hpp>
+#include <cmath>
+
+
+namespace sf
+{
+////////////////////////////////////////////////////////////
+CircleShape::CircleShape(float radius, unsigned int pointCount) :
+m_radius (radius),
+m_pointCount(pointCount)
+{
+ update();
+}
+
+
+////////////////////////////////////////////////////////////
+void CircleShape::setRadius(float radius)
+{
+ m_radius = radius;
+ update();
+}
+
+
+////////////////////////////////////////////////////////////
+float CircleShape::getRadius() const
+{
+ return m_radius;
+}
+
+
+////////////////////////////////////////////////////////////
+void CircleShape::setPointCount(unsigned int count)
+{
+ m_pointCount = count;
+ update();
+}
+
+////////////////////////////////////////////////////////////
+unsigned int CircleShape::getPointCount() const
+{
+ return m_pointCount;
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2f CircleShape::getPoint(unsigned int index) const
+{
+ static const float pi = 3.141592654f;
+
+ float angle = index * 2 * pi / m_pointCount - pi / 2;
+ float x = std::cos(angle) * m_radius;
+ float y = std::sin(angle) * m_radius;
+
+ return Vector2f(m_radius + x, m_radius + y);
+}
+
+} // namespace sf