Paula:
Are you using 1.2.1? Using your code sample as guide, I modified
the texture program under demo/java3d/TextureTest/TextureImage and it works
correctly. I have attached the modified program.
-Uma
Java3D Team
> MIME-version: 1.0
> X-MIMEOLE: Produced By Microsoft MimeOLE V5.00.2615.200
> Content-transfer-encoding: 7bit
> X-Priority: 3
> X-MSMail-priority: Normal
> Date: Sun, 1 Apr 2001 16:14:25 +0100
> From: Paula Keohan <[EMAIL PROTECTED]>
> Subject: [JAVA3D] Textures and transparency
> To: [EMAIL PROTECTED]
>
> Hi all,
>
> I've created an Appearance object from a Texture2D object. I've set the
> transparency attributes of the appearance also. But, when I change the
alpha
> value, it doesn't have any effect on the appearance. Anyone got any ideas
> why the transparency doesn't change? Is it just not possible with
textures
> created from images? I've included code below.
>
> Thanks,
> Paula.
>
>
> Appearance textureAppearance = new Appearance();
> TransparencyAttributes transparency = new TransparencyAttributes(
> TransparencyAttributes.NICEST, .85f);
>
> PolygonAttributes polyAttrib = new PolygonAttributes();
> polyAttrib.setCullFace(PolygonAttributes.CULL_BACK);
> textureAppearance.setPolygonAttributes(polyAttrib);
>
> TexCoordGeneration tcg = new
> TexCoordGeneration(TexCoordGeneration.OBJECT_LINEAR,
> TexCoordGeneration.TEXTURE_COORDINATE_2);
> textureAppearance.setTexCoordGeneration(tcg);
>
> String filename = texturefilepath.getAbsolutePath() +
File.separatorChar +
> texturename;
>
> TextureLoader loader = new TextureLoader(filename, this);
> ImageComponent2D image = loader.getScaledImage(1024, 1024);
>
> Texture2D texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA,
> image.getWidth(),
> image.getHeight());
> texture.setImage(0, image);
> texture.setEnable(true);
>
> textureAppearance.setTexture(texture);
> textureAppearance.setTransparencyAttributes(transparency);
>
>
===========================================================================
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the
body
> of the message "signoff JAVA3D-INTEREST". For general help, send email
to
> [EMAIL PROTECTED] and include in the body of the message "help".
/*
* %Z%%M% %I% %E% %U%
*
* Copyright (c) 1996-2001 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.*;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.geometry.Box;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
public class TextureImage extends JApplet implements ActionListener {
private java.net.URL texImage = null;
private SimpleUniverse u = null;
JCheckBox changeTransp;
TransparencyAttributes transparency1, transparency2;
Appearance app;
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);
// Create appearance object for textured cube
app = new Appearance();
Texture tex = new TextureLoader(texImage, this).getTexture();
app.setTexture(tex);
TextureAttributes texAttr = new TextureAttributes();
texAttr.setTextureMode(TextureAttributes.MODULATE);
app.setTextureAttributes(texAttr);
transparency1 = new TransparencyAttributes(
TransparencyAttributes.NICEST, .85f);
transparency2 = new TransparencyAttributes(
TransparencyAttributes.NICEST, .3f);
PolygonAttributes polyAttrib = new PolygonAttributes();
polyAttrib.setCullFace(PolygonAttributes.CULL_BACK);
app.setPolygonAttributes(polyAttrib);
app.setTransparencyAttributes(transparency1);
app.setCapability(Appearance.ALLOW_TRANSPARENCY_ATTRIBUTES_WRITE);
// Create textured cube and add it to the scene graph.
Box textureCube = new Box(0.4f, 0.4f, 0.4f,
Box.GENERATE_TEXTURE_COORDS, app);
objTrans.addChild(textureCube);
// 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);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
rotator.setSchedulingBounds(bounds);
objTrans.addChild(rotator);
// Have Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
}
public TextureImage() {
}
public TextureImage(java.net.URL url) {
texImage = url;
}
public void init() {
Container contentPane = getContentPane();
if (texImage == null) {
// the path to the image for an applet
try {
texImage = new java.net.URL(getCodeBase().toString() +
"../images/stone.jpg");
}
catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
Canvas3D c = new Canvas3D(config);
contentPane.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);
JPanel p = new JPanel();
BoxLayout boxlayout = new BoxLayout(p,
BoxLayout.Y_AXIS);
p.setLayout(boxlayout);
changeTransp = new JCheckBox("Change Transparency",
false);
changeTransp.addActionListener(this);
p.add(changeTransp);
contentPane.add("South", p);
}
public void destroy() {
u.removeAllLocales();
}
//
// The following allows TextureImage to be run as an application
// as well as an applet
//
public static void main(String[] args) {
java.net.URL url = null;
if (args.length > 0) {
try {
url = new java.net.URL("file:" + args[0]);
}
catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
else {
// the path to the image for an application
try {
url = new java.net.URL("file:../images/stone.jpg");
}
catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
new MainFrame(new TextureImage(url), 256, 256);
}
public void actionPerformed(ActionEvent e) {
int i;
Object target = e.getSource();
if (target == changeTransp) {
if ( changeTransp.isSelected()) {
app.setTransparencyAttributes(transparency2);
}
else {
app.setTransparencyAttributes(transparency1);
}
}
}
}
