Hi,
Since D3D only support negative offset, the example
is modified as below to work under both OGL and D3D.
There is also another test in the attachment for hidden
line removal that you may found useful.
- Kelvin
---------------
Java 3D Team
Sun Microsystems Inc.
>
>At 10:11 AM 12/8/2000 -0800, you wrote:
>>An example of this is attached. You'll want to do the same thing as the
>>example, except you'll want to make the filled polygons have the background
>>color.
>
/*
* @(#)PolygonOffset.java 1.48 99/05/20 14:07:00
*
* Copyright (c) 1996-1998 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 javax.swing.*;
import javax.swing.event.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
public class PolygonOffset extends JFrame implements ChangeListener {
JLabel sliderValueLabel;
PolygonAttributes solidPa;
PolygonAttributes wirePa;
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 a Sphere. We will display this as both wireframe and
// solid to make a hidden line display
// wireframe
Appearance wire = new Appearance();
wirePa = new PolygonAttributes(
PolygonAttributes.POLYGON_LINE,
PolygonAttributes.CULL_BACK,
0.0f);
wire.setPolygonAttributes(wirePa);
Sphere wireSphere = new Sphere(0.7f, wire);
objTrans.addChild(wireSphere);
// solid
Color3f red = new Color3f(1.0f, 0.0f, 0.0f);
ColoringAttributes solidCa = new ColoringAttributes(red,
ColoringAttributes.SHADE_FLAT);
Material solidMat = new Material();
solidMat.setLightingEnable(false);
Appearance solid = new Appearance();
solid.setMaterial(solidMat);
solid.setColoringAttributes(solidCa);
solidPa = new PolygonAttributes(
PolygonAttributes.POLYGON_FILL,
PolygonAttributes.CULL_BACK,
0.0f);
// solidPa.setCapability(PolygonAttributes.ALLOW_OFFSET_WRITE);
wirePa.setCapability(PolygonAttributes.ALLOW_OFFSET_WRITE);
solid.setPolygonAttributes(solidPa);
Sphere solidSphere = new Sphere(0.7f, solid);
objTrans.addChild(solidSphere);
// Create a new Behavior object that will perform the desired
// operation on the specified transform object and add it into
// the scene graph.
AxisAngle4f axisAngle = new AxisAngle4f(0.0f, 0.0f, 1.0f,
-(float)Math.PI / 2.0f);
Transform3D yAxis = new Transform3D();
Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
0, 0,
80000, 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 void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
float offset = source.getValue();
//solidPa.setPolygonOffset(offset);
wirePa.setPolygonOffset(-offset);
sliderValueLabel.setText(Float.toString(offset));
}
public PolygonOffset() {
super("Polygon Offset");
JPanel contentPane = new JPanel();
contentPane.setLayout(new BorderLayout());
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
Canvas3D canvas = new Canvas3D(config);
canvas.setSize(800, 800);
contentPane.add(canvas, BorderLayout.CENTER);
setContentPane(contentPane);
// Create a simple scene and attach it to the virtual universe
BranchGroup scene = createSceneGraph();
SimpleUniverse u = new SimpleUniverse(canvas);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
JPanel sliderPanel = new JPanel();
JLabel sliderLabel = new JLabel("Polygon Offset");
sliderPanel.add(sliderLabel);
JSlider offsetSlider = new JSlider(JSlider.HORIZONTAL, 0, 1500, 0);
offsetSlider.addChangeListener(this);
sliderPanel.add(offsetSlider);
sliderValueLabel = new JLabel("0.0");
sliderPanel.add(sliderValueLabel);
contentPane.add(sliderPanel, BorderLayout.SOUTH);
pack();
show();
}
//
// The following allows PolygonOffset to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new PolygonOffset();
}
}
/*
* @(#)HLR.java 1.46 98/11/17 17:27:55
*
* Copyright (c) 1996-1998 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.BorderLayout;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
public class HLR extends Applet {
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 HLR Sphere and Cone offset from one another
Transform3D t = new Transform3D();
ColoringAttributes ca;
PolygonAttributes pa;
TransparencyAttributes ta;
Appearance app;
t.set(new Vector3d(0.05, 0.05, 0.1));
TransformGroup sphereTrans = new TransformGroup(t);
objTrans.addChild(sphereTrans);
Sphere sphere = new Sphere(0.3f);
app = new Appearance();
ca = new ColoringAttributes();
ca.setColor(new Color3f(0.0f, 0.0f, 0.0f));
app.setColoringAttributes(ca);
pa = new PolygonAttributes();
pa.setPolygonMode(pa.POLYGON_FILL);
pa.setPolygonOffset(0.0f);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
sphere.setAppearance(app);
sphereTrans.addChild(sphere);
sphere = new Sphere(0.3f);
app = new Appearance();
ca = new ColoringAttributes();
ca.setColor(new Color3f(1.0f, 0.0f, 0.0f));
app.setColoringAttributes(ca);
pa = new PolygonAttributes();
pa.setPolygonMode(pa.POLYGON_LINE);
pa.setPolygonOffset(-500.0f);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
ta = new TransparencyAttributes();
ta.setTransparencyMode(ta.BLENDED);
app.setTransparencyAttributes(ta);
sphere.setAppearance(app);
sphereTrans.addChild(sphere);
t.set(new Vector3d(-0.05, -0.05, -0.1));
TransformGroup coneTrans = new TransformGroup(t);
objTrans.addChild(coneTrans);
Cone cone = new Cone(0.4f, 0.8f);
app = new Appearance();
ca = new ColoringAttributes();
ca.setColor(new Color3f(0.0f, 0.0f, 0.0f));
app.setColoringAttributes(ca);
pa = new PolygonAttributes();
pa.setPolygonMode(pa.POLYGON_FILL);
pa.setPolygonOffset(0.0f);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
cone.setAppearance(app);
coneTrans.addChild(cone);
cone = new Cone(0.4f, 0.8f);
app = new Appearance();
ca = new ColoringAttributes();
ca.setColor(new Color3f(0.0f, 1.0f, 0.0f));
app.setColoringAttributes(ca);
pa = new PolygonAttributes();
pa.setPolygonMode(pa.POLYGON_LINE);
pa.setPolygonOffset(-500.0f);
pa.setCullFace(pa.CULL_NONE);
app.setPolygonAttributes(pa);
ta = new TransparencyAttributes();
ta.setTransparencyMode(ta.BLENDED);
app.setTransparencyAttributes(ta);
cone.setAppearance(app);
coneTrans.addChild(cone);
// 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 HLR() {
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 HLR to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new HLR(), 256, 256);
}
}
