src/edu/mit/ezyang/gravity/j3d/EditableGroup.java

   1 /*
   2  * To change this template, choose Tools | Templates
   3  * and open the template in the editor.
   4  */
   5 package edu.mit.ezyang.gravity.j3d;
   6
   7 import com.sun.j3d.utils.picking.behaviors.PickZoomBehavior;
   8 import edu.mit.ezyang.gravity.j3d.SmartPickTranslateBehavior;
   9 import javax.media.j3d.BoundingSphere;
  10 import javax.media.j3d.Bounds;
  11 import javax.media.j3d.BranchGroup;
  12 import javax.media.j3d.Canvas3D;
  13 import javax.media.j3d.Node;
  14 import javax.media.j3d.Transform3D;
  15 import javax.media.j3d.TransformGroup;
  16 import javax.vecmath.Point3d;
  17 import javax.vecmath.Vector3f;
  18
  19 /**
  20  * Convenience group for adding elements that need to be editable.
  21  * @warning Actual object should be added using addTransformChild(), NOT
  22  *          addChild().
  23  * @author Edward Z. Yang <ezyang@mit.edu>
  24  */
  25 public class EditableGroup extends BranchGroup {
  26
  27     private TransformGroup transformGroup;
  28
  29     public EditableGroup(Canvas3D canvas, TransformGroup rotateGroup, Vector3f location) {
  30         setCapability(BranchGroup.ALLOW_DETACH);
  31
  32         Bounds bounds = new BoundingSphere(new Point3d(0f, 0f, 0f), 1000f);
  33
  34         SmartPickTranslateBehavior translate = new SmartPickTranslateBehavior(this, canvas, bounds);
  35         translate.setRotateTransformGroup(rotateGroup);
  36         addChild(translate);
  37
  38         // :TODO: this needs to be modified to be smart
  39         SmartPickZoomBehavior zoom = new SmartPickZoomBehavior(this, canvas, bounds);
  40         zoom.setRotateTransformGroup(rotateGroup);
  41         addChild(zoom);
  42
  43         transformGroup = new TransformGroup();
  44         transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
  45         transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
  46         transformGroup.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
  47
  48         Transform3D transform = new Transform3D();
  49         transform.setTranslation(location);
  50         transformGroup.setTransform(transform);
  51
  52         addChild(transformGroup);
  53     }
  54
  55     public void addTransformChild(Node child) {
  56         transformGroup.addChild(child);
  57     }
  58
  59
  60 }