com.almasb.fxgl.physics.box2d.dynamics.joints.ConstantVolumeJointDef Maven / Gradle / Ivy

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/*
 * FXGL - JavaFX Game Library. The MIT License (MIT).
 * Copyright (c) AlmasB ([email protected]).
 * See LICENSE for details.
 */
package com.almasb.fxgl.physics.box2d.dynamics.joints;

import com.almasb.fxgl.physics.box2d.dynamics.Body;

import java.util.ArrayList;

/**
 * Definition for a {@link ConstantVolumeJoint}, which connects a group a bodies together so they
 * maintain a constant volume within them.
 */
public class ConstantVolumeJointDef extends JointDef {
    public float frequencyHz;
    public float dampingRatio;

    ArrayList bodies;
    ArrayList joints;

    public ConstantVolumeJointDef() {
        super(JointType.CONSTANT_VOLUME);
        bodies = new ArrayList();
        joints = null;
        collideConnected = false;
        frequencyHz = 0.0f;
        dampingRatio = 0.0f;
    }

    /**
     * Adds a body to the group
     *
     * @param argBody
     */
    public void addBody(Body argBody) {
        bodies.add(argBody);
        if (bodies.size() == 1) {
            bodyA = argBody;
        }
        if (bodies.size() == 2) {
            bodyB = argBody;
        }
    }

    /**
     * Adds a body and the pre-made distance joint. Should only be used for deserialization.
     */
    public void addBodyAndJoint(Body argBody, DistanceJoint argJoint) {
        addBody(argBody);
        if (joints == null) {
            joints = new ArrayList();
        }
        joints.add(argJoint);
    }
}