> MIME-Version: 1.0
> Date: Tue, 8 Feb 2000 12:02:36 -0500
> From: John Kasdan <[EMAIL PROTECTED]>
> Subject: [JAVA3D] Pauli exclusion principle for Spheres?
> To: [EMAIL PROTECTED]
>
> When I use the utility class Sphere I find that I can only show one Sphere
> constructed with the default (void) constructor. Also, if I use an
> appearance object on which I have only set the material, I can only display
> one sphere of a given radius. But if I only set the coloring attribute, I
> can display multiple spheres of the same radius. I have no similar problem
> with the Box class. Any suggestions as to what's happening?
>
> JK
>
Hi,
Do you have an example program you can send to [EMAIL PROTECTED] that
demonstrates these problems?
Attached is a quick hack I did to HelloUniverse to display two Sphere
primitives that use the default constructor - both show up.
Dan Petersen
Java 3D Team
Sun Microsystems
** Look for the newsgroup: comp.lang.java.3d **
/*
* @(#)HelloUniverse.java 1.48 00/02/10 13:14:09
*
* Copyright (c) 1996-2000 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* 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.image.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
public class HelloUniverse extends Applet {
public BranchGroup createSceneGraph() {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create the transform group node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at runtime. Add it to the
// root of the subgraph.
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
DirectionalLight dl = new DirectionalLight();
dl.setDirection(new Vector3f(1.0f, 0.5f, 0.0f));
dl.setInfluencingBounds(bounds);
objRoot.addChild(dl);
// Create a simple shape leaf node, add it to the scene graph.
Sphere sphere1 = new Sphere( );
objTrans.addChild(sphere1);
Transform3D trans = new Transform3D();
trans.setTranslation(new Vector3d(1.0, .5, 0.0));
TransformGroup tg = new TransformGroup(trans);
objRoot.addChild(tg);
Sphere sphere2 = new Sphere( );
tg.addChild(sphere2);
// Create a new Behavior object that will perform the desired
// operation on the specified transform object and add it into
// the scene graph.
Transform3D yAxis = new Transform3D();
Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
0, 0,
4000, 0, 0,
0, 0, 0);
RotationInterpolator rotator =
new RotationInterpolator(rotationAlpha, objTrans, yAxis,
0.0f, (float) Math.PI*2.0f);
rotator.setSchedulingBounds(bounds);
objTrans.addChild(rotator);
// Have Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
}
public HelloUniverse() {
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();
SimpleUniverse u = new SimpleUniverse(c);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
// u.getViewingPlatform().setNominalViewingTransform();
Transform3D t3d = new Transform3D();
t3d.setTranslation(new Vector3d(0.0, 0.0, 10.0));
u.getViewingPlatform().getViewPlatformTransform().setTransform(t3d);
u.addBranchGraph(scene);
}
//
// 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);
}
}
