picktranslatebehavior.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: PickTranslateBehavior.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
 * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
 * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
 * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
 * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
 * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
 * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 *
 * $Revision: 1.4 $
 * $Date: 2007/02/09 17:20:14 $
 * $State: Exp $
 */

package com.sun.j3d.utils.behaviors.picking;

import com.sun.j3d.utils.behaviors.mouse.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.media.j3d.*;
import javax.vecmath.*;

// A mouse behavior that allows user to pick and translate scene graph objects.
// Common usage: 1. Create your scene graph. 2. Create this behavior with
// the root and canvas. See PickRotateBehavior for more details. 

/**
 * @deprecated As of Java 3D version 1.2, replaced by
 * <code>com.sun.j3d.utils.picking.behaviors.PickTranslateBehavior</code>
 *
 * @see com.sun.j3d.utils.picking.behaviors.PickTranslateBehavior
 */

public class PickTranslateBehavior extends PickMouseBehavior implements MouseBehaviorCallback {
  MouseTranslate translate;
  int pickMode = PickObject.USE_BOUNDS;
  private PickingCallback callback = null;
  private TransformGroup currentTG;

  /**
   * Creates a pick/translate behavior that waits for user mouse events for
   * the scene graph. This method has its pickMode set to BOUNDS picking. 
   * @param root   Root of your scene graph.
   * @param canvas Java 3D drawing canvas.
   * @param bounds Bounds of your scene.
   **/

  public PickTranslateBehavior(BranchGroup root, Canvas3D canvas, Bounds bounds){
    super(canvas, root, bounds);
    translate = new MouseTranslate(MouseBehavior.MANUAL_WAKEUP);
    translate.setTransformGroup(currGrp);
    currGrp.addChild(translate);
    translate.setSchedulingBounds(bounds);
    this.setSchedulingBounds(bounds);
  }

  /**
   * Creates a pick/translate behavior that waits for user mouse events for
   * the scene graph.
   * @param root   Root of your scene graph.
   * @param canvas Java 3D drawing canvas.
   * @param bounds Bounds of your scene.
   * @param pickMode specifys PickObject.USE_BOUNDS or PickObject.USE_GEOMETRY.
   * Note: If pickMode is set to PickObject.USE_GEOMETRY, all geometry object in 
   * the scene graph that allows pickable must have its ALLOW_INTERSECT bit set. 
   **/

  public PickTranslateBehavior(BranchGroup root, Canvas3D canvas, Bounds bounds,
 			       int pickMode){
    super(canvas, root, bounds);
    translate = new MouseTranslate(MouseBehavior.MANUAL_WAKEUP);
    translate.setTransformGroup(currGrp);
    currGrp.addChild(translate);
    translate.setSchedulingBounds(bounds);
    this.setSchedulingBounds(bounds);
    this.pickMode = pickMode;
  }

  /**
   * Sets the pickMode component of this PickTranslateBehavior to the value of
   * the passed pickMode.
   * @param pickMode the pickMode to be copied.
   **/  

  public void setPickMode(int pickMode) {
    this.pickMode = pickMode;
  }

 /**
   * Return the pickMode component of this PickTranslaeBehavior.
   **/ 

  public int getPickMode() {
    return pickMode;
  }

  /**
   * Update the scene to manipulate any nodes. This is not meant to be 
   * called by users. Behavior automatically calls this. You can call 
   * this only if you know what you are doing.
   * 
   * @param xpos Current mouse X pos.
   * @param ypos Current mouse Y pos.
   **/
  public void updateScene(int xpos, int ypos){
    TransformGroup tg = null;
        
    if (!mevent.isAltDown() && mevent.isMetaDown()){
      
      tg =(TransformGroup)pickScene.pickNode(pickScene.pickClosest(xpos, ypos, pickMode),
					     PickObject.TRANSFORM_GROUP);
      //Check for valid selection. 
      if ((tg != null) && 
	  (tg.getCapability(TransformGroup.ALLOW_TRANSFORM_READ)) && 
	  (tg.getCapability(TransformGroup.ALLOW_TRANSFORM_WRITE))){
	
	translate.setTransformGroup(tg);
	translate.wakeup();
	currentTG = tg;
      } else if (callback!=null)
	callback.transformChanged( PickingCallback.NO_PICK, null );
    }
    
  }

  /**
    * Callback method from MouseTranslate
    * This is used when the Picking callback is enabled
    */
  public void transformChanged( int type, Transform3D transform ) {
      callback.transformChanged( PickingCallback.TRANSLATE, currentTG );
  }

  /**
    * Register the class @param callback to be called each
    * time the picked object moves
    */
  public void setupCallback( PickingCallback callback ) {
      this.callback = callback;
      if (callback==null)
          translate.setupCallback( null );
      else
          translate.setupCallback( this );
  }

}