Added RopeJoint

--HG--
branch : box2d-update

src/modules/physics/box2d/RopeJoint.h

@@ -0,0 +1,62 @@
+/**
+* Copyright (c) 2006-2011 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_PHYSICS_BOX2D_ROPE_JOINT_H
+#define LOVE_PHYSICS_BOX2D_ROPE_JOINT_H
+
+// Module
+#include "Joint.h"
+
+namespace love
+{
+namespace physics
+{
+namespace box2d
+{
+	/**
+	* The RopeJoint enforces a maximum distance between two points 
+	* on two bodies. It has no other effect.
+	**/
+	class RopeJoint : public Joint
+	{
+	private:
+		// The Box2D RopeJoint object.
+		b2RopeJoint * joint;
+	public:
+
+		/**
+		* Creates a RopeJoint connecting body1 to body2. 
+		**/
+		RopeJoint(Body * body1, Body * body2, float x1, float y1, float x2, float y2, float maxLength);
+		
+		virtual ~RopeJoint();
+		
+		/**
+		* Gets the maximum length of the rope.
+		**/
+		float getMaxLength() const;
+		
+	};
+
+} // box2d
+} // physics
+} // love
+
+#endif // LOVE_PHYSICS_BOX2D_ROPE_JOINT_H