FrictionJoint.java

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.physics.box2d.joints;

import com.badlogic.gdx.physics.box2d.Joint;
import com.badlogic.gdx.physics.box2d.World;

/** Friction joint. This is used for top-down friction. It provides 2D translational friction and angular friction. */
public class FrictionJoint extends Joint {
	// @off
	/*JNI
	#include <Box2D/Box2D.h> 
	 */

	public FrictionJoint(World world, long addr) {
		super(world, addr);
	}

	/** Set the maximum friction force in N. */
	public void setMaxForce(float force) {
		jniSetMaxForce(addr, force);
	}

	private native void jniSetMaxForce(long addr, float force); /*
																b2FrictionJoint* joint = (b2FrictionJoint*)addr;
																joint->SetMaxForce( force );
																*/

	/** Get the maximum friction force in N. */
	public float getMaxForce() {
		return jniGetMaxForce(addr);
	}

	private native float jniGetMaxForce(long addr); /*
													b2FrictionJoint* joint = (b2FrictionJoint*)addr;
													return joint->GetMaxForce();
													*/

	/** Set the maximum friction torque in N*m. */
	public void setMaxTorque(float torque) {
		jniSetMaxTorque(addr, torque);
	}

	private native void jniSetMaxTorque(long addr, float torque); /*
																	b2FrictionJoint* joint = (b2FrictionJoint*)addr;
																	joint->SetMaxTorque( torque );
																	*/

	/** Get the maximum friction torque in N*m. */
	public float getMaxTorque() {
		return jniGetMaxTorque(addr);
	}

	private native float jniGetMaxTorque(long addr); /*
														b2FrictionJoint* joint = (b2FrictionJoint*)addr;
														return joint->GetMaxTorque();
														*/
}