We're using an off screen buffer and have several simple shapes identified but
text names using Text3D. In order to keep the text in the correct orientation
we've used OrientedShape3D.
This has worked fine up until the point we actually used the Off screen buffer.
The text itself doesn't seem to scale with the other shapes.
Below is a simple example, simply enter a scaling factor in the dialog
(0.something to about 10 should work fine) and view the result. The Sphere
scales but the Text does not.
There is a SHOW_BUG boolean you can switch in the code to demonstrate what we
expect to happen.
Comments would be welcome.
-John Davies-
-------------------------------- BugPanel.java --------------------
import java.awt.event.*;
import java.awt.image.*;
import java.awt.*;
import javax.swing.*;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
/**
* Copyright (c) 2001 Century 24 Solutions Ltd.
*
* www.c24solutions.com
* Suite 10
* Three Tuns House
* 109 Borough High Street
* London, SE1 1NL
*
* Tel: +44 (0)20 7744 6220
*
* Simon Heinrich
* [EMAIL PROTECTED]
*
* 3rd April 2001
*/
public class BugPanel extends JPanel implements ActionListener
{
private static final boolean SHOW_BUG = true;
private static final int WIDTH = 640;
private static final int HEIGHT = 480;
private static final Color3f RED = new Color3f(1.0f, 0.0f, 0.0f);
private static final Color3f WHITE = new Color3f(1.0f, 1.0f, 1.0f);
private static final Color3f BLACK = new Color3f(0.0f, 0.0f, 0.0f);
private SimpleUniverse universe;
private BoundingSphere bounds;
private BranchGroup objRoot;
private JLabel label;
private Canvas3D canvas;
private TransformGroup textTG;
private TransformGroup sphTG;
public BugPanel()
{
initGUI();
addSceneGraph();
canvas.renderOffScreenBuffer();
}
private void initGUI()
{
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
canvas = new Canvas3D(config, true)
{
public void postSwap()
{
label.setIcon(new
ImageIcon(canvas.getOffScreenBuffer().getImage()));
}
};
BufferedImage offScreenImg = new BufferedImage(WIDTH, HEIGHT ,
BufferedImage.TYPE_INT_RGB);
ImageComponent2D buffer = new
ImageComponent2D(ImageComponent.FORMAT_RGB, offScreenImg);
buffer.setCapability(ImageComponent2D.ALLOW_IMAGE_READ);
canvas.setOffScreenBuffer(buffer);
canvas.getScreen3D().setSize(new Dimension(1280, 1024));
canvas.getScreen3D().setPhysicalScreenWidth(0.36124);
canvas.getScreen3D().setPhysicalScreenHeight(0.28899555);
bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
objRoot = new BranchGroup();
objRoot.setCapability(Group.ALLOW_CHILDREN_EXTEND);
// Set up background
Background background = new Background(0.0f, 0.0f, 0.0f);
background.setApplicationBounds(bounds);
objRoot.addChild(background);
// Set up lighting
DirectionalLight dLgt = new DirectionalLight(true, new Color3f(0.8f,
0.8f, 0.8f), new Vector3f(0.5f, -0.2f, -1.0f));
dLgt.setInfluencingBounds(bounds);
objRoot.addChild(dLgt);
// Set up universe
universe = new SimpleUniverse(canvas);
universe.getViewingPlatform().setNominalViewingTransform();
universe.getViewer().getView().setProjectionPolicy(javax.media.j3d.View.PARALLEL_PROJECTION);
universe.addBranchGraph(objRoot);
label = new JLabel();
this.setLayout(new BorderLayout());
this.add(label, BorderLayout.CENTER);
}
private void addSceneGraph()
{
BranchGroup bg = new BranchGroup();
TransformGroup tg = new TransformGroup();
TransformGroup state = new TransformGroup();
//Text
Transform3D textT3D = new Transform3D();
textT3D.setScale(1.0);
textTG = new TransformGroup(textT3D);
textTG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
textTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Font3D f3d = new Font3D(new Font("Comic Sans MS", Font.PLAIN, 1), new
FontExtrusion());
Text3D txt = new Text3D(f3d, "x");
Material redMaterial = new Material(RED, BLACK, RED, WHITE, 128.0f);
redMaterial.setLightingEnable(true);
Appearance redAppearance = new Appearance();
redAppearance.setMaterial(redMaterial);
if (SHOW_BUG)
{
OrientedShape3D textShape = new OrientedShape3D(txt, redAppearance,
OrientedShape3D.ROTATE_ABOUT_AXIS, new Vector3f( 0.0f, 1.0f, 0.0f));
textTG.addChild(textShape);
}
else
{
Shape3D textShape = new Shape3D(txt, redAppearance);
textTG.addChild(textShape);
}
state.addChild(textTG);
//Sphere
Transform3D sphT3D = new Transform3D();
sphT3D.setScale(1.0);
sphTG = new TransformGroup(sphT3D);
sphTG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
sphTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Sphere sphShape = new Sphere(0.05f, Sphere.GENERATE_NORMALS |
Sphere.GENERATE_TEXTURE_COORDS | Sphere.ENABLE_GEOMETRY_PICKING |
Sphere.ENABLE_APPEARANCE_MODIFY, 15, redAppearance);
sphTG.addChild(sphShape);
state.addChild(sphTG);
tg.addChild(state);
bg.addChild(tg);
objRoot.addChild(bg);
}
public void actionPerformed(ActionEvent e)
{
double scale = new Double(JOptionPane.showInputDialog(this, "Enter scale
ratio (0.001 - 10.000):")).doubleValue();
System.out.println("Setting scale to: "+scale);
Transform3D t3d = new Transform3D();
// Scale text
textTG.getTransform(t3d);
t3d.setScale(scale);
textTG.setTransform(t3d);
// Scale sphere
sphTG.getTransform(t3d);
t3d.setScale(scale);
sphTG.setTransform(t3d);
System.out.println("Rendering off screen buffer");
canvas.renderOffScreenBuffer();
}
public static void main(String args[])
{
JFrame f = new JFrame();
BugPanel bugPanel = new BugPanel();
f.getContentPane().add(bugPanel);
JToolBar toolBar = new JToolBar();
JButton refresh = new JButton("Change scaling");
refresh.addActionListener(bugPanel);
toolBar.add(refresh);
f.getContentPane().add(toolBar, BorderLayout.NORTH);
f.setSize(bugPanel.WIDTH, bugPanel.HEIGHT);
f.setVisible(true);
System.out.println("Ready...");
}
}
begin:vcard
n:Davies;John
tel;cell:+44 (0) 7770 697272
tel;fax:+44 (0) 7092 167832
tel;work:+44 (0) 20 7744 6220
x-mozilla-html:TRUE
url:http://www.c24solutions.com
org:Century 24 Solutions
version:2.1
email;internet:[EMAIL PROTECTED]
title:Technical Director
adr;quoted-printable:;;Suite 10, Three Tuns House=0D=0A109 Borough High Street=0D=0ALondon SE1 1NL;London;;;UK
fn:John Davies
end:vcard
