Hi Kelvin,
I've attached source code to illustrate the bug.
Thanks,
Renoir
Kelvin Chung wrote:
> Hi Renoir,
>
> Thanks for your bug report. Please send us a
> test program for investigation so that we can fix
> it before release.
>
> - Kelvin
> ------------
> Java 3D Team
> Sun Microsystems Inc.
>
> >Delivered-To: [EMAIL PROTECTED]
> >X-Accept-Language: en
> >MIME-Version: 1.0
> >Date: Mon, 26 Nov 2001 15:21:43 +0200
> >From: Renoir Sewjee <[EMAIL PROTECTED]>
> >Subject: [JAVA3D] AntiAliasing Problem 1.3 beta
> >To: [EMAIL PROTECTED]
> >
> >Hi,
> >
> >There seems to be an antialiasing problem in j3d 1.3 beta (see attached
> >picture) - the areas that are supposed to be transparent are filled with
> >the background colour. My setup is WinNT, NVidia Vanta, j2sdk 1.3.1_01
> >(also tested on 1.4 beta 3, same results).
> >
> >Regards,
> >Renoir
> >
> >--
> >Renoir Sewjee
> >Software Engineer
> >ISS International (Welkom)
> >Tel: +27 (0)57 912 2702
> >Fax: +27 (0)57 912 2652
> >--
> >
--
Renoir Sewjee
Software Engineer
ISS International (Welkom)
Tel: +27 (0)57 912 2702
Fax: +27 (0)57 912 2652
--
import java.awt.Dimension;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Color3f;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Background;
import javax.media.j3d.Material;
import javax.media.j3d.Appearance;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Shape3D;
import javax.media.j3d.PointArray;
import javax.media.j3d.PointAttributes;
import javax.media.j3d.ColoringAttributes;
import javax.media.j3d.TransparencyAttributes;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
/**
* Illustrates an antialiasing problem in 1.3 beta: when antialiased geometry is in
front of
* geometry that allows transparency, the parts of the antialiased geometry that are
supposed to
* be transparent are rendered in the background colour.
*
* As an example,
* A point array with antialiased points in drawn in front of a sphere, when the
sphere can be
* transparent (transparency att set and transparency mode != none) you will see a
border around the points.
*
*/
public class AntiAliasingBug extends JFrame
{
public AntiAliasingBug(boolean sphereTransparent)
{
super();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
BoundingSphere everywhere = new BoundingSphere(new Point3d(),
Double.MAX_VALUE);
Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
canvas.setDoubleBufferEnable(true);
getContentPane().add(canvas, BorderLayout.CENTER);
SimpleUniverse universe = new SimpleUniverse(canvas);
universe.getViewingPlatform().setNominalViewingTransform();
BranchGroup lights = new BranchGroup();
DirectionalLight directionalLight = new DirectionalLight();
directionalLight.setInfluencingBounds(everywhere);
lights.addChild(directionalLight);
AmbientLight ambientLight = new AmbientLight();
ambientLight.setInfluencingBounds(everywhere);
lights.addChild(ambientLight);
universe.getViewingPlatform().getViewPlatformTransform().addChild(lights);
BranchGroup root = new BranchGroup();
Background background = new Background(1, 1, 1);
background.setApplicationBounds(everywhere);
root.addChild(background);
/*
* Sphere.
*
*/
Material sphereMaterial = new Material();
sphereMaterial.setDiffuseColor(1, 0, 1);
Appearance sphereAppearance = new Appearance();
sphereAppearance.setMaterial(sphereMaterial);
if (sphereTransparent)
// Sphere can be transparent.
sphereAppearance.setTransparencyAttributes(new
TransparencyAttributes(TransparencyAttributes.NICEST, 0.0f));
else
// Sphere cannot be transparent - could even leave out the following
statement.
sphereAppearance.setTransparencyAttributes(new
TransparencyAttributes(TransparencyAttributes.NONE, 0.0f));
root.addChild(new Sphere(0.5f, Sphere.GENERATE_NORMALS, sphereAppearance));
/*
* Point Array.
*
*/
PointAttributes pointAttributes = new PointAttributes(10, true);
Appearance pointAppearance = new Appearance();
pointAppearance.setPointAttributes(pointAttributes);
Point3f point = new Point3f();
Color3f colour = new Color3f();
PointArray pointArray = new PointArray(5, PointArray.COORDINATES |
PointArray.COLOR_3);
point.set(0.0f, 0.0f, 0.6f);
colour.set(0, 1, 0);
pointArray.setCoordinate(0, point);
pointArray.setColor(0, colour);
point.set(0.0f, 0.1f, 0.6f);
colour.set(1, 0, 0);
pointArray.setCoordinate(1, point);
pointArray.setColor(1, colour);
point.set(0.0f, -0.1f, 0.6f);
colour.set(1, 0, 0);
pointArray.setCoordinate(2, point);
pointArray.setColor(2, colour);
point.set(0.1f, 0.0f, 0.6f);
colour.set(0, 0, 1);
pointArray.setCoordinate(3, point);
pointArray.setColor(3, colour);
point.set(-0.1f, 0.0f, 0.6f);
colour.set(0, 0, 1);
pointArray.setCoordinate(4, point);
pointArray.setColor(4, colour);
root.addChild(new Shape3D(pointArray, pointAppearance));
/*
* Orbit Behaviour.
*
*/
OrbitBehavior orbitter = new OrbitBehavior(canvas, OrbitBehavior.REVERSE_ALL);
orbitter.setSchedulingBounds(everywhere);
orbitter.setViewingPlatform(universe.getViewingPlatform());
root.addChild(orbitter);
root.compile();
universe.addBranchGraph(root);
}
public static void main(String[] args)
{
boolean sphereTransparent = true;
if (args.length >= 1)
{
if (args[0].toLowerCase().equals("true")) sphereTransparent = true;
if (args[0].toLowerCase().equals("false")) sphereTransparent = false;
}
else
{
System.err.println();
System.err.println("usage: java AntiAliasingBug [true | false]");
System.err.println("A first argument of true allows the sphere to have
transparency (the default).");
System.err.println();
}
AntiAliasingBug app = new AntiAliasingBug(sphereTransparent);
app.setTitle("AntiAliasing Bug 1.3 beta");
app.setSize(800, 600);
app.setVisible(true);
}
}
