/**
* Copyright (c) 2006-2012 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_REVOLUTE_JOINT_H
#define LOVE_PHYSICS_BOX2D_REVOLUTE_JOINT_H

// Module
#include "Joint.h"

namespace love
{
namespace physics
{
namespace box2d
{
	/**
	* A RevoluteJoint allows two bodies relative rotation
	* around a single point.
	**/
	class RevoluteJoint : public Joint
	{
	private:

		// The Box2D revolute joint object.
		b2RevoluteJoint * joint;

	public:

		/**
		* Creates a new RevoluteJoint connecting body1 and body2.
		**/
		RevoluteJoint(Body * body1, Body * body2, float x, float y, bool collideConnected);

		virtual ~RevoluteJoint();

		/**
		* Get the current joint angle in degrees.
		**/
		float getJointAngle() const;

		/**
		* Get the current joint angle speed in degrees per second.
		**/
		float getJointSpeed() const;

		/**
		* Enable/disable the joint motor.
		**/
		void enableMotor(bool motor);

		/**
		* Checks whether the motor is enabled.
		**/
		bool isMotorEnabled() const;

		/**
		* Set the maximum motor torque, usually in N-m.
		**/
		void setMaxMotorTorque(float torque);

		/**
		* Sets the motor speed in radians per second.
		**/
		void setMotorSpeed(float speed);

		/**
		* Gets the motor speed in radians per second.
		**/
		float getMotorSpeed() const;

		/**
		* Get the current motor torque, usually in N-m.
		* @param inv_dt The inverse timestep.
		**/
		float getMotorTorque(float inv_dt) const;

		/**
		* Get the maximum motor torque, usually in N-m.
		**/
		float getMaxMotorTorque() const;

		/**
		* Enable/disable the joint limit.
		**/
		void enableLimit(bool limit);

		/**
		* Checks whether limits are enabled.
		**/
		bool isLimitEnabled() const;

		/**
		* Sets the upper limit in degrees.
		**/
		void setUpperLimit(float limit);

		/**
		* Sets the lower limit in degrees.
		**/
		void setLowerLimit(float limit);

		/**
		* Sets the limits in degrees.
		**/
		void setLimits(float lower, float upper);

		/**
		* Gets the lower limit in degrees.
		**/
		float getLowerLimit() const;

		/**
		* Gets the upper limit in degrees.
		**/
		float getUpperLimit() const;

		/**
		* Gets the limits in degrees.
		* @returns The lower limit.
		* @returns The upper limit.
		**/
		int getLimits(lua_State * L);

	};

} // box2d
} // physics
} // love

#endif // LOVE_PHYSICS_BOX2D_REVOLUTE_JOINT_H
