Hi:
I can't reproduce this using Java3d 1.2 beta2
under both solaris and windows. If you are using
Java3D 1.1 please try again using 1.2. Also
please try using the latest version of JDK which
has better GC.
Thanks.
- Kelvin
------------
Java 3D Team
Sun Microsystems Inc.
>X-Originating-IP: [212.125.161.83]
>Mime-Version: 1.0
>Date: Fri, 21 Apr 2000 16:51:13 GMT
>From: Are Meisfjord <[EMAIL PROTECTED]>
>Subject: [JAVA3D] Bug in cloneTree()?
>To: [EMAIL PROTECTED]
>
>Hi!
>
>
>I'm working on an application that builds up a data structure containing
>some Java3D Nodes (Boxes etc.), but also instances of other classes. The J3D
>Node instances in this structure are not part of any SceneGraph, but there
>is a method that traverses the data structure and produces a SceneGraph.
>This is accomplished by calling cloneTree() on each Node.
>
>This seems to work fine, but the strange thing is that the performance of
>the traverse method becomes worse and worse when it is being called
>repeatedly. The problem seems to be cloneTree() and I've made this little
>test program to demonstrate it:
>
>// Test.java
>import java.applet.Applet;
>import java.awt.event.*;
>import com.sun.j3d.utils.applet.MainFrame;
>import com.sun.j3d.utils.geometry.*;
>import java.awt.*;
>import java.util.*;
>
>public class Test extends Applet {
>
> private Box box = new Box();
>
> public Test() {
> Button btnTest = new Button("Test");
> btnTest.addActionListener(new ActionListener() {
> public void actionPerformed(ActionEvent e) {
> // Try un-commenting next line and see what happens!
> // box = new Box();
> System.out.println("Started: " +
> Calendar.getInstance().getTime());
> for (int i = 0; i < 100; i++) {
> box.cloneTree();
> }
> System.out.println("Stopped: " +
> Calendar.getInstance().getTime() +
> "\r\n");
> System.gc();
> }});
> add(btnTest);
> }
>
> public static void main(String[] args) {
> Frame frame = new MainFrame(new Test(), 100, 40);
> }
>
>}
>// End of Test.java
>
>The program creates a Box and clones it 100 times every time the user hits
>the button. Here is a sample transcript that illustrates the problem:
>
>C:\>java Test
>Started: Fri Apr 21 16:43:49 GMT+02:00 2000
>Stopped: Fri Apr 21 16:43:53 GMT+02:00 2000
>
>Started: Fri Apr 21 16:43:57 GMT+02:00 2000
>Stopped: Fri Apr 21 16:44:03 GMT+02:00 2000
>
>Started: Fri Apr 21 16:44:08 GMT+02:00 2000
>Stopped: Fri Apr 21 16:44:22 GMT+02:00 2000
>
>Started: Fri Apr 21 16:44:59 GMT+02:00 2000
>Stopped: Fri Apr 21 16:45:28 GMT+02:00 2000
>
>Started: Fri Apr 21 16:46:19 GMT+02:00 2000
>Stopped: Fri Apr 21 16:47:13 GMT+02:00 2000
>
>As you can see, what initially took four seconds takes almost a minute when
>it's run the fifth time! I wonder if this is a bug in Java3D, or if I'm just
>missing something important. Hope you can help me out with this one...
>
>Regards,
>
>
>Are Meisfjord
>
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