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love / src / modules / physics / box2d / DistanceJoint.h

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/**
 * 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_PHYSICS_BOX2D_DISTANCE_JOINT_H
#define LOVE_PHYSICS_BOX2D_DISTANCE_JOINT_H

// Module
#include "Joint.h"

namespace love
{
namespace physics
{
namespace box2d
{

/**
 * The DistanceJoint keeps Bodies at a fixed distance
 * from eachother.
 **/
class DistanceJoint : public Joint
{
public:

	/**
	 * Creates a DistanceJoint connecting body1 to body2.
	 **/
	DistanceJoint(Body *body1, Body *body2, float x1, float y1, float x2, float y2, bool collideConnected);

	virtual ~DistanceJoint();

	/**
	 * Sets the equilibrium distance between the two bodies.
	 **/
	void setLength(float length);

	/**
	 * Gets the equilibrium distance between the two bodies.
	 **/
	float getLength() const;

	/**
	 * Sets the response speed.
	 **/
	void setFrequency(float hz);

	/**
	 * Gets the response speed.
	 **/
	float getFrequency() const;

	/**
	 * Sets the damping ratio.
	 * 0 = no damping, 1 = critical damping.
	 **/
	void setDampingRatio(float d);

	/**
	 * Gets the damping ratio.
	 * 0 = no damping, 1 = critical damping.
	 **/
	float getDampingRatio() const;

private:
	// The Box2D DistanceJoint object.
	b2DistanceJoint *joint;
};

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

#endif // LOVE_PHYSICS_BOX2D_DISTANCE_JOINT_H