Source

love / src / modules / physics / box2d / RopeJoint.cpp

/**
 * 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.
 **/

#include "RopeJoint.h"

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

namespace love
{
namespace physics
{
namespace box2d
{

RopeJoint::RopeJoint(Body *body1, Body *body2, float x1, float y1, float x2, float y2, float maxLength, bool collideConnected)
	: Joint(body1, body2)
	, joint(NULL)
{
	b2RopeJointDef def;
	def.bodyA = body1->body;
	def.bodyB = body2->body;
	body1->getLocalPoint(x1, y1, x1, y1);
	body2->getLocalPoint(x2, y2, x2, y2);
	def.localAnchorA.x = Physics::scaleDown(x1);
	def.localAnchorA.y = Physics::scaleDown(y1);
	def.localAnchorB.x = Physics::scaleDown(x2);
	def.localAnchorB.y = Physics::scaleDown(y2);
	def.maxLength = Physics::scaleDown(maxLength);
	def.collideConnected = collideConnected;
	joint = (b2RopeJoint *)createJoint(&def);
}

RopeJoint::~RopeJoint()
{
}

float RopeJoint::getMaxLength() const
{
	return Physics::scaleUp(joint->GetMaxLength());
}


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