love2d.love/src/modules/physics/box2d/DistanceJoint.cpp

/**
* 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.
**/

#include "DistanceJoint.h"

// Module
#include "Body.h"
#include "World.h"
#include "Physics.h"

namespace love
{
namespace physics
{
namespace box2d
{
	DistanceJoint::DistanceJoint(Body * body1, Body * body2, float x1, float y1, float x2, float y2, bool collideConnected)
		: Joint(body1, body2), joint(NULL)
	{
		b2DistanceJointDef def;
		def.Initialize(body1->body, body2->body, Physics::scaleDown(b2Vec2(x1,y1)), Physics::scaleDown(b2Vec2(x2,y2)));
		def.collideConnected = collideConnected;
		joint = (b2DistanceJoint*)createJoint(&def);
	}

	DistanceJoint::~DistanceJoint()
	{
	}

	void DistanceJoint::setLength(float length)
	{
		joint->SetLength(Physics::scaleDown(length));
	}

	float DistanceJoint::getLength() const
	{
		return Physics::scaleUp(joint->GetLength());
	}

	void DistanceJoint::setFrequency(float hz)
	{
		joint->SetFrequency(hz);
	}

	float DistanceJoint::getFrequency() const
	{
		return joint->GetFrequency();
	}

	void DistanceJoint::setDampingRatio(float d)
	{
		joint->SetDampingRatio(d);
	}

	float DistanceJoint::getDampingRatio() const
	{
		return joint->GetDampingRatio();
	}


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