MATH: Move the math classes to their own math/ dir and Math namespace.

math/vector2d.h

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+/* Residual - A 3D game interpreter
+ *
+ * Residual is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ * $URL$
+ * $Id$
+ */
+
+#ifndef MATH_VECTOR2D_H
+#define MATH_VECTOR2D_H
+
+#include "math/vector3d.h"
+
+namespace Math {
+
+class Vector2d {
+public:
+	Vector2d();
+	Vector2d(float x, float y);
+	Vector2d(const Vector2d &vec);
+
+	inline float getX() const { return _x; }
+	inline float getY() const { return _y; }
+	void setX(float x);
+	void setY(float y);
+
+	Vector2d &operator=(const Vector2d &vec);
+	Vector2d &operator/=(float s);
+
+	void normalize();
+	Vector2d getNormalized() const;
+
+	void rotateAround(const Vector2d &point, float angle);
+	float getAngle() const;
+	float getMagnitude() const;
+	float getDistanceTo(const Vector2d &point) const;
+
+	Vector3d toVector3d() const;
+
+private:
+	float _x;
+	float _y;
+};
+
+inline Vector2d operator-(const Vector2d& v1, const Vector2d& v2) {
+	Vector2d result(v1.getX() - v2.getX(), v1.getY() - v2.getY());
+	return result;
+}
+
+inline Vector2d operator+(const Vector2d &v1, const Vector2d &v2) {
+	Vector2d result(v1.getX() + v2.getX(), v1.getY() + v2.getY());
+	return result;
+}
+
+inline Vector2d operator*(const Vector2d &v1, float factor) {
+	Vector2d result(v1.getX() * factor, v1.getY() * factor);
+	return result;
+}
+
+inline Vector2d operator/(const Vector2d &v1, float factor) {
+	Vector2d result(v1.getX() / factor, v1.getY() / factor);
+	return result;
+}
+
+inline Vector2d operator-(const Vector2d &v) {
+	return Vector2d(-v.getX(), -v.getY());
+}
+
+}
+
+namespace Common {
+class Debug;
+}
+
+Common::Debug &operator<<(Common::Debug dbg, const Math::Vector2d &v);
+
+#endif