src/edu/mit/ezyang/gravity/j3d/utils/picking/behaviors/PickSelectBehavior.java

   1 /*
   2  * To change this template, choose Tools | Templates
   3  * and open the template in the editor.
   4  */
   5
   6 package edu.mit.ezyang.gravity.j3d.utils.picking.behaviors;
   7
   8 import edu.mit.ezyang.gravity.j3d.utils.picking.behaviors.PickSelectCallback;
   9 import com.sun.j3d.utils.behaviors.mouse.MouseBehaviorCallback;
  10 import com.sun.j3d.utils.geometry.Primitive;
  11 import com.sun.j3d.utils.picking.PickResult;
  12 import com.sun.j3d.utils.picking.behaviors.PickMouseBehavior;
  13 import java.awt.event.MouseEvent;
  14 import javax.media.j3d.Bounds;
  15 import javax.media.j3d.BranchGroup;
  16 import javax.media.j3d.Canvas3D;
  17 import javax.media.j3d.Transform3D;
  18
  19 /**
  20  *
  21  * @author Edward Z. Yang <ezyang@mit.edu>
  22  */
  23 public class PickSelectBehavior extends PickMouseBehavior implements MouseBehaviorCallback {
  24     protected PickSelectCallback callback;
  25     public PickSelectBehavior(BranchGroup root, Canvas3D canvas, Bounds bounds) {
  26         super(canvas, root, bounds);
  27         setSchedulingBounds(bounds);
  28     }
  29     public void setupCallback(PickSelectCallback callback) {
  30         this.callback = callback;
  31     }
  32     public void updateScene(int xpos, int ypos) {
  33         Primitive primitive = null;
  34         if (mevent.getButton() == MouseEvent.BUTTON1) {
  35             pickCanvas.setShapeLocation(xpos, ypos);
  36             PickResult pr = pickCanvas.pickClosest();
  37             if ((pr != null) &&
  38                     ((primitive = (Primitive) pr.getNode(PickResult.PRIMITIVE)) != null) &&
  39                     (primitive.getCapability(Primitive.ENABLE_APPEARANCE_MODIFY ))) {
  40                 if (callback != null) {
  41                     callback.notifyPick(primitive);
  42                 }
  43             }
  44         }
  45     }
  46
  47     /**
  48      * Callback method from MouseTranslate
  49      * This is used when the Picking callback is enabled
  50      */
  51     public void transformChanged(int type, Transform3D transform) {
  52     }
  53 }