Hi Veasna,
The brachgraph create in utility Box (in v1.2) is
Group (Box)
|
TG
/ | \
Body Top bottom
Attach is a simple example that clone Box/Cone
modify from HelloUniverse. It didn't show the problem.
It seems that your code detach TG from Group
before calling cloneNode(). This will cause
the Exception that you shown when Box trying
to get TG using getChild(0) in cloneNode.
Is this what your code is doing ? If not
please send us a test case for investigation.
Note that in the Spec of Node.java
we discourage the use of cloneNode directly.
* NOTE: Applications should <i>not</i> call this method directly.
* It should only be called by the cloneTree method.
*
public Node cloneNode(boolean forceDuplicate)
instead cloneTree() should be used.
Also, starting from v1.2.1 beta2 the TransformGroup
(TG) will be eliminate and branchgraph
of Box will become:
Group (Box)
/ | \
Body Top bottom
Thanks.
- Kelvin
-------------------
Java 3D Team
Sun Microsystems Inc.
>MIME-Version: 1.0
>Date: Wed, 8 Nov 2000 15:53:06 -0800
>From: "HENG,VEASNA (HP-Corvallis,ex1)" <[EMAIL PROTECTED]>
>Subject: [JAVA3D] Problem with Box.cloneNode(true)
>To: [EMAIL PROTECTED]
>
>Hello Java 3D Team:
>
>I am hoping someone out there or the Java 3D Team can help me with the
following
>problem:
>
>I am using JDK 1.3 and Java 3D 1.2 to implement a Java 3D program. When I try
to
>clone a Box primitive node, I got the following exception:
>
>Exception occurred during event dispatching:
>java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
> at java.util.Vector.elementAt(Vector.java:417)
> at javax.media.j3d.GroupRetained.getChild(GroupRetained.java:34
> at javax.media.j3d.Group.getChild(Group.java:219)
> at com.sun.j3d.utils.geometry.Box.getShape(Box.java:215)
> at com.sun.j3d.utils.geometry.Primitive.getAppearance(Primitive)
> at com.sun.j3d.utils.geometry.Box.cloneNode(Box.java:336)
>
>I got similar except on cloning a Cone primitive:
>
>Exception occurred during event dispatching:
>java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
> at java.util.Vector.elementAt(Vector.java:417)
> at javax.media.j3d.GroupRetained.getChild(GroupRetained.java
> at javax.media.j3d.Group.getChild(Group.java:219)
> at com.sun.j3d.utils.geometry.Cone.getShape(Cone.java:116)
> at com.sun.j3d.utils.geometry.Primitive.getAppearance(Primitive)
> at com.sun.j3d.utils.geometry.Cone.cloneNode(Cone.java:293)
>
>This seems like a bug somewhere in the Group Node class? I appreciate any
>assistance you can provide at this point. Please e-mail me your answer if
>possible. My e-mail address is [EMAIL PROTECTED]
>
>Thanks,
>- Veasna
>
>===========================================================================
>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
>of the message "signoff JAVA3D-INTEREST". For general help, send email to
>[EMAIL PROTECTED] and include in the body of the message "help".
/*
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* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
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* redistribute the Software for such purposes.
*/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
public class HelloUniverse extends Applet {
private SimpleUniverse u = null;
public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create the TransformGroup node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at run time. Add it to
// the root of the subgraph.
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);
// Create a simple Shape3D node; add it to the scene graph.
objTrans.addChild(new ColorCube(0.4));
// Create a new Behavior object that will perform the
// desired operation on the specified transform and add
// it into the scene graph.
Transform3D yAxis = new Transform3D();
Alpha rotationAlpha = new Alpha(-1, 4000);
RotationInterpolator rotator =
new RotationInterpolator(rotationAlpha, objTrans, yAxis,
0.0f, (float) Math.PI*2.0f);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
rotator.setSchedulingBounds(bounds);
objRoot.addChild(rotator);
Appearance app = new Appearance();
Box box= new Box(0.2f, 0.2f, 0.2f, 0, app, 0);
Box box2= new Box();
Cone cone = new Cone(0.4f, 0.3f);
objRoot.addChild(cone);
objRoot.addChild(box);
Node cloneBox = box.cloneNode(true);
Node cloneBox2 = box2.cloneNode(true);
Node cloneCone = cone.cloneNode(true);
System.out.println(cloneBox);
System.out.println(cloneBox2);
System.out.println(cloneCone);
// Have Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
}
public HelloUniverse() {
}
public void init() {
setLayout(new BorderLayout());
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
Canvas3D c = new Canvas3D(config);
add("Center", c);
// Create a simple scene and attach it to the virtual universe
BranchGroup scene = createSceneGraph();
u = new SimpleUniverse(c);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
}
public void destroy() {
u.removeAllLocales();
}
//
// The following allows HelloUniverse to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new HelloUniverse(), 256, 256);
}
}
