[bezier curve] add missing files

src/modules/math/BezierCurve.h

@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * 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.
+ **/
+
+#ifndef LOVE_MATH_BEZIER_CURVE_H
+#define LOVE_MATH_BEZIER_CURVE_H
+
+// LOVE
+#include "common/Object.h"
+#include "common/Vector.h"
+#include <vector>
+
+namespace love
+{
+namespace math
+{
+
+class BezierCurve : public Object
+{
+public:
+
+	/**
+	 * @param controlPoints Control polygon of the curve.
+	 **/
+	BezierCurve(const std::vector<Vector> &controlPoints);
+
+	/**
+	 * @returns Degree of the curve
+	 **/
+	size_t getDegree() const
+	{
+		return controlPoints.size() - 1;
+	}
+
+	/**
+	 * @returns i'th control point.
+	 **/
+	const Vector &getControlPoint(int i) const;
+
+	/**
+	 * Sets the i'th control point.
+	 * @param i Control point to change.
+	 * @param point New control point.
+	 **/
+	void setControlPoint(int i, const Vector &point);
+
+	/**
+	 * Insert a new control point before the i'th control point.
+	 * If i < 0, Lua string indexing rules apply.
+	 * @param point Control point to insert.
+	 * @param pos Position to insert.
+	 **/
+	void insertControlPoint(const Vector &point, int pos = -1);
+
+	/**
+	 * Evaluates the curve at time t.
+	 * @param t Curve parameter, must satisfy 0 <= t <= 1.
+	 **/
+	Vector eval(double t) const;
+
+	/**
+	 * Renders the curve by subdivision.
+	 * @param accuracy The 'fineness' of the curve.
+	 * @returns A polygon chain that approximates the bezier curve.
+	 **/
+	std::vector<Vector> render(size_t accuracy = 4) const;
+
+private:
+	std::vector<Vector> controlPoints;
+};
+
+}
+}
+
+#endif