autoresponding me... Extrated from Specification:
"Note that if this Group node is part of a live or
compiled scene graph, only BranchGroup nodes may be added to or removed
from it--and only if the appropriate capability bits are set."
Ra�l wrote:
> then... What ALLOW_CHILDREN_EXTEND is for?
>
>
> (I'd like to adding nodes without make a new Branchgroup for each one or
> dettachig and attaching the BranchGroup each time.)
>
>
>
> Scott Rutledge wrote:
>
>> Attach your ColorCube to a BranchGroup then add the BranchGroup to the
>> live
>> Group.
>>
>> At 10:52 PM 4/17/2002 +0200, you wrote:
>>
>>> Im trying to add a ColorCube to a living Group, I set the
>>> ALLOW_CHILDREN_EXTEND capability bit to all the groups but I receive the
>>> javax.media.j3d.RestrictedAccessException: Group: only a BranchGroup
>>> node may be added
>>>
>>> Can anybody show me what can I modify to avoid it.
>>>
>>> Thanks.
>>>
>>> Here is the code:
>>>
>>> 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.ColorCube;
>>> import com.sun.j3d.utils.universe.*;
>>> import javax.media.j3d.*;
>>> import javax.vecmath.*;
>>>
>>> public class HelloUniverse extends Applet {
>>>
>>> private SimpleUniverse u = null;
>>> TransformGroup objTrans = new TransformGroup();
>>> 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.
>>>
>>> objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
>>> objRoot.addChild(objTrans);
>>>
>>> objTrans.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
>>> objRoot.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
>>>
>>> // 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);
>>> // Create a simple Shape3D node; add it to the scene graph.
>>> objTrans.addChild(new ColorCube(0.4));
>>> }
>>>
>>> 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);
>>> }
>>> }
>>
>>
>>
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>>
>
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