com.laex.cg2d.model.joints.BEPulleyJoint.java Source code

Introduction

Here is the source code for com.laex.cg2d.model.joints.BEPulleyJoint.java

Source

/*
 * Copyright (c) 2012, 2013 Hemanta Sapkota.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Hemanta Sapkota (laex.pearl@gmail.com)
 */
package com.laex.cg2d.model.joints;

import org.apache.commons.lang.ArrayUtils;
import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.PropertyDescriptor;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;

import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.JointDef.JointType;
import com.badlogic.gdx.physics.box2d.joints.PulleyJointDef;
import com.laex.cg2d.model.descs.Vec2PropertySource;
import com.laex.cg2d.model.model.Joint;
import com.laex.cg2d.model.model.Shape;
import com.laex.cg2d.model.util.FloatUtil;

/**
 * The Class BEPulleyJoint.
 */
public class BEPulleyJoint extends Joint {

    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 677561183649479725L;

    /** The Constant GROUND_ANCHOR_A_PROP. */
    public static final String GROUND_ANCHOR_A_PROP = "PulleyJoint.GroundAnchorA";

    /** The Constant GROUND_ANCHOR_B_PROP. */
    public static final String GROUND_ANCHOR_B_PROP = "PulleyJoint.GroundAnchorB";

    /** The Constant RATIO_PROP. */
    public static final String RATIO_PROP = "PulleyJoint.Ratio";

    /** The descriptors. */
    private static IPropertyDescriptor[] descriptors;

    static {
        PropertyDescriptor groundAnchorAProp = new PropertyDescriptor(GROUND_ANCHOR_A_PROP, "Ground Anchor A");
        PropertyDescriptor groundAnchorBProp = new PropertyDescriptor(GROUND_ANCHOR_B_PROP, "Ground Anchor B");

        PropertyDescriptor ratioProp = new TextPropertyDescriptor(RATIO_PROP, "Ratio");

        descriptors = new IPropertyDescriptor[] { groundAnchorAProp, groundAnchorBProp, ratioProp };
    }

    /** The pulley joint def. */
    private PulleyJointDef pulleyJointDef = new PulleyJointDef();

    /** The ground anchor b. */
    private Vector2 groundAnchorA, groundAnchorB;

    /** The ratio. */
    float ratio;

    /**
     * Instantiates a new bE pulley joint.
     * 
     * @param source
     *          the source
     * @param target
     *          the target
     */
    public BEPulleyJoint(Shape source, Shape target) {
        super(source, target);

        groundAnchorA = new Vector2(-1, 1);
        groundAnchorB = new Vector2(1, 1);
        ratio = 1;
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getEditableValue()
     */
    @Override
    public Object getEditableValue() {
        return pulleyJointDef;
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getPropertyDescriptors()
     */
    @Override
    public IPropertyDescriptor[] getPropertyDescriptors() {
        return (IPropertyDescriptor[]) ArrayUtils.addAll(super.getPropertyDescriptors(), descriptors);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#setPropertyValue(java.lang.Object,
     * java.lang.Object)
     */
    @Override
    public void setPropertyValue(Object id, Object value) {

        if (isGroundAnchorA(id)) {
            this.groundAnchorA = (Vector2) value;
        } else if (isGroundAnchorB(id)) {
            this.groundAnchorB = (Vector2) value;
        } else if (isRatioProp(id)) {
            this.ratio = FloatUtil.toFloat(value);
        } else {
            super.setPropertyValue(id, value);
        }

    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getPropertyValue(java.lang.Object)
     */
    @Override
    public Object getPropertyValue(Object id) {
        if (isGroundAnchorA(id)) {
            return new Vec2PropertySource(groundAnchorA);
        } else if (isGroundAnchorB(id)) {
            return new Vec2PropertySource(groundAnchorB);
        } else if (isRatioProp(id)) {
            return Float.toString(ratio);
        }

        return super.getPropertyValue(id);
    }

    /**
     * Checks if is ratio prop.
     * 
     * @param id
     *          the id
     * @return true, if is ratio prop
     */
    private boolean isRatioProp(Object id) {
        return RATIO_PROP.equals(id);
    }

    /**
     * Checks if is ground anchor a.
     * 
     * @param id
     *          the id
     * @return true, if is ground anchor a
     */
    private boolean isGroundAnchorA(Object id) {
        return GROUND_ANCHOR_A_PROP.equals(id);
    }

    /**
     * Checks if is ground anchor b.
     * 
     * @param id
     *          the id
     * @return true, if is ground anchor b
     */
    private boolean isGroundAnchorB(Object id) {
        return GROUND_ANCHOR_B_PROP.equals(id);
    }

    /*
     * (non-Javadoc)
     * 
     * @see com.laex.cg2d.shared.model.Joint#getJointType()
     */
    @Override
    public JointType getJointType() {
        return JointType.PulleyJoint;
    }

    /**
     * Gets the ground anchor a.
     * 
     * @return the ground anchor a
     */
    public Vector2 getGroundAnchorA() {
        return groundAnchorA;
    }

    /**
     * Gets the ground anchor b.
     * 
     * @return the ground anchor b
     */
    public Vector2 getGroundAnchorB() {
        return groundAnchorB;
    }

    /**
     * Gets the ratio.
     * 
     * @return the ratio
     */
    public float getRatio() {
        return ratio;
    }

    /* (non-Javadoc)
     * @see com.laex.cg2d.model.model.Joint#computeLocalAnchors(int)
     */
    @Override
    public void computeLocalAnchors(int ptmRatio) {
        // TODO Auto-generated method stub

    }

}