Hi,
I'm trying to create an application using Swing and Java 3D.
My problem is that it seems as if the Canvas3D stops rendering
when I resize or try to open a file using the standard file opener.
It's even more strange than that. If you resize the window and
releases the mouse, everything looks good. But as soon as the
mouse is moved (inside the app), the Canvas3D goes blank.
I've tried to go through the email archive and the j3d faq regarding
lightweight/heavyweight problems, but have not found any help.
Does anybody know if this is a known bug, or am I just doing
something strange?
I've attached the source files to reproduce the problem.
I'm running java 1.4.0 and java 3D 1.3 beta1 windows opengl
Regards,
Roger Berggren
package com.decim;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.*;
public class AppScene
{
Canvas3D canvas;
public AppScene()
{
}
public Canvas3D createCanvas()
{
GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D();
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice device = env.getDefaultScreenDevice();
GraphicsConfiguration config = device.getBestConfiguration(template);
this.canvas = new Canvas3D(config);
return this.canvas;
}
public SceneManager createScene()
{
SceneManager scene = SceneManager.getInstance();
BoundingSphere bounds = new BoundingSphere(new Point3d(), 100.0);
scene.addCamera(createCamera(bounds));
scene.makeLive();
BranchGroup startup = new BranchGroup();
String message = "Application startup";
float length = message.length();
Transform3D transform = new Transform3D();
TransformGroup scale = new TransformGroup();
transform.setScale(1.0);
transform.rotY(-0.75);
scale.setTransform(transform);
startup.addChild(scale);
Font3D f3d = new Font3D(new Font("Courier", Font.PLAIN, 3), new FontExtrusion());
Text3D txt = new Text3D(f3d, message, new Point3f(-length / 1.5f, -1f, -1f));
Shape3D sh = new Shape3D();
Appearance app = new Appearance();
Material mm = new Material();
mm.setLightingEnable(true);
app.setMaterial(mm);
sh.setGeometry(txt);
sh.setAppearance(app);
scale.addChild(sh);
Color3f ambientColor = new Color3f(0.3f, 0.3f, 0.3f);
AmbientLight ambientLightNode = new AmbientLight(ambientColor);
ambientLightNode.setInfluencingBounds(bounds);
startup.addChild(ambientLightNode);
startup.setCapability(BranchGroup.ALLOW_DETACH);
startup.setCapability(Node.ALLOW_BOUNDS_READ);
scene.changeWorldGroup(startup);
return scene;
}
public TransformGroup createCamera(BoundingSphere bounds)
{
PhysicalEnvironment env;
DirectionalLight headlight;
PhysicalBody body;
View view;
ViewPlatform platform = new ViewPlatform();
Vector3f loc = new Vector3f(0, 0, 10.0f);
Group head = new Group();
head.setCapability(Group.ALLOW_CHILDREN_EXTEND);
Transform3D location = new Transform3D();
location.setTranslation(loc);
TransformGroup transform = new TransformGroup();
transform.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
transform.setTransform(location);
transform.addChild(platform);
transform.addChild(head);
// oneFrameRotation = new Transform3D();
// now create the headlight
headlight = new DirectionalLight();
headlight.setCapability(Light.ALLOW_STATE_WRITE);
headlight.setColor(new Color3f(1, 1, 1));
headlight.setInfluencingBounds(bounds);
headlight.setEnable(true);
transform.addChild(headlight);
body = new PhysicalBody();
env = new PhysicalEnvironment();
view = new View();
view.setBackClipDistance(100);
view.setPhysicalBody(body);
view.setPhysicalEnvironment(env);
view.attachViewPlatform(platform);
view.addCanvas3D(canvas);
return transform;
}
}
package com.decim;
import javax.media.j3d.Canvas3D;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.io.File;
public class Designer extends JFrame implements ActionListener
{
public Designer()
{
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("Designer");
JButton openButton = new JButton("Open ...");
openButton.addActionListener(this);
getContentPane().add(openButton, BorderLayout.SOUTH);
this.setSize(640, 400);
}
public void addCanvas(Canvas3D canvas)
{
getContentPane().add(canvas, BorderLayout.CENTER);
}
public void actionPerformed(java.awt.event.ActionEvent evt)
{
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnVal = fc.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
File file = fc.getSelectedFile();
String path = file.getAbsolutePath();
this.setTitle("Designer [" + file.getName() + "]");
}
}
public void displayFrame(boolean center)
{
this.validate();
if (center == true)
{
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = this.getSize();
if (frameSize.height > screenSize.height)
{
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width)
{
frameSize.width = screenSize.width;
}
this.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
}
this.setVisible(true);
}
public static void main(String args[])
{
AppScene scene = new AppScene();
Designer frame = new Designer();
frame.addCanvas(scene.createCanvas());
SceneManager mgr = scene.createScene();
frame.displayFrame(true);
}
}
package com.decim;
import javax.media.j3d.*;
public class SceneManager extends VirtualUniverse
{
private Locale locale;
private BranchGroup viewGroup;
private BranchGroup worldGroup;
private static SceneManager instance;
private SceneManager()
{
this.locale = new Locale(this);
this.viewGroup = new BranchGroup();
this.viewGroup.setCapability(Group.ALLOW_CHILDREN_EXTEND);
this.worldGroup = new BranchGroup();
this.worldGroup.setCapability(BranchGroup.ALLOW_DETACH);
}
public static synchronized SceneManager getInstance()
{
if (instance == null)
{
instance = new SceneManager();
}
return instance;
}
public void addCamera(TransformGroup cam)
{
this.viewGroup.addChild(cam);
}
public void makeLive()
{
this.viewGroup.compile();
this.worldGroup.compile();
this.locale.addBranchGraph(this.viewGroup);
this.locale.addBranchGraph(this.worldGroup);
}
public synchronized void changeWorldGroup(BranchGroup newGroup)
{
newGroup.compile();
this.locale.replaceBranchGraph(this.worldGroup, newGroup);
this.worldGroup = newGroup;
}
}
