Attached is an example which, I think, shows a transparent gif
file used as a texture. The gif file consists of lines and
symbols on a clear background. The example is a modified version
of demo/java3d/TextureTest/TextureImage. The attached gif file
goes in ../images relative to that.
The display is of a rotating cube with the texture on it. The
cube is blue, and I tried to make the cube itself transparent.
However, nothing can be seen under the texture except blue.
Should the opposite side of the cube be visible? or just
anything which is inside the cube?
lmd
> MIME-Version: 1.0
> Date: Fri, 17 Nov 2000 13:13:04 -0500
> From: "J. Lee Dixon" <[EMAIL PROTECTED]>
> Subject: Re: [JAVA3D] java3d1.2.1beta1 - transparent gif as texture fails
> To: [EMAIL PROTECTED]
>
> You need to enable blending...
>
> TransparencyAttributes transp = new TransparencyAttributes();
> transp.setTransparencyMode(TransparencyAttributes.BLENDED);
> appearance.setTransparencyAttributes(transp);
> // workaround for bug... default RenderAttr
> appearance.setRenderingAttributes( new RenderingAttributes() );
>
> Previously there was a bug concerning transparencies, and setting
> the default RenderingAttributes was the workaround. I don't know if
> it is still needed or not...
>
> -Lee
>
> -----Original Message-----
> From: Tom Nelson [mailto:[EMAIL PROTECTED]]
> Sent: Friday, November 17, 2000 11:31 AM
> To: [EMAIL PROTECTED]
> Subject: [JAVA3D] java3d1.2.1beta1 - transparent gif as texture fails
>
>
> If I use a transparent gif as a texture
> (for example, in demos/java3d/TextureTest/MultiTextureTest.java)
> the object appears solid black. A non-transparent gif works fine.
> Is there something new we have to set for textures with transparency?
>
> Thanks,
> Tom Nelson
>
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LeRoy M. Dorman Scripps Institution of Oceanography, 0220
University of California, San Diego La Jolla, CA 92093-0220
voice: +1 858 534-2406 fax: +1 858 534-6849 inet: [EMAIL PROTECTED]
http://www-mpl.ucsd.edu/cg/people/ldorman.html
Physical address:
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/*
* @(#)TextureImage.java 1.20 00/03/31 14:28:06
*
* 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.*;
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.*;
public class TextureImaget extends Applet {
private java.net.URL texImage = null;
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
Appearance app = new Appearance();
// app.setCapability(Appearance.ALLOW_TEXTURE_WRITE);
// app.setCapability(Appearance.ALLOW_TEXTURE_ATTRIBUTES_WRITE);
Texture tex = new TextureLoader(texImage, this).getTexture();
app.setTexture(tex);
TextureAttributes texAttr = new TextureAttributes();
texAttr.setTextureMode(TextureAttributes.DECAL);
app.setTextureAttributes(texAttr);
TransparencyAttributes _transAtt = new TransparencyAttributes();
// _transAtt.setTransparencyMode(TransparencyAttributes.BLENDED);
_transAtt.setTransparency(0.6f);
app.setTransparencyAttributes(_transAtt);
// app.setRenderingAttributes( new RenderingAttributes());
ColoringAttributes _colorAtt = new ColoringAttributes( 0.f, 0.f, 0.5f,
ColoringAttributes.SHADE_GOURAUD);
app.setColoringAttributes(_colorAtt);
/*
*/
// 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,
24000, 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 TextureImaget() {
}
public TextureImaget(java.net.URL url) {
texImage = url;
}
public void init() {
if (texImage == null) {
// the path to the image for an applet
try {
texImage = new java.net.URL(getCodeBase().toString() +
"../images/LauLayout_ai.gif");
// "../images/Laulayout_ai.png");
// "../images/stone.jpg");
}
catch (java.net.MalformedURLException ex) {
System.out.println(ex.getMessage());
System.exit(1);
}
}
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();
u.addBranchGraph(scene);
}
//
// 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/LauLayout_ai.gif");
// url = new java.net.URL("file:../images/Laulayout_ai.png");
// 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 TextureImaget(url), 512, 512);
}
}
LauLayout_ai.gif
LauLayout_ai.gif