Hello,
I had the same problems a few weeks ago, so I tryed
lots of things but my borders were never really good
drawen. You have to set an offset for the polygon
attributes of your appearance
I found this wonderful sample, try it, I think that it
can solve your problem !!!
_____________________________
/*
%Z%%M% %I% %E% %U%
***************************************************************
"Copyright (c) 2001 Sun Microsystems, Inc. All Rights
Reserved.
Redistribution and use in source and binary forms,
with or without
modification, are permitted provided that the
following conditions are met:
-Redistributions of source code must retain the above
copyright notice, this
list of conditions and the following disclaimer.
-Redistribution in binary form must reproduce the
above copyright notice, this
list of conditions and the following disclaimer in the
documentation and/or
other materials provided with the distribution.
Neither the name of Sun Microsystems, Inc. or the
names of contributors may be
used to endorse or promote products derived from this
software without
specific prior written permission.
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.
You acknowledge that Software is not designed,licensed
or intended for use in
the design, construction, operation or maintenance of
any nuclear facility."
****************************************************************************
*/
import java.applet.Applet;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
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.*;
import java.awt.*;
import java.text.NumberFormat;
public class PolygonOffset extends Applet implements
Java3DExplorerConstants {
SimpleUniverse u;
boolean isApplication;
Canvas3D canvas;
OffScreenCanvas3D offScreenCanvas;
View view;
PolygonAttributes solidPa;
PolygonAttributes wirePa;
float dynamicOffset = 1.0f;
float staticOffset = 1.0f;
ViewingPlatform viewingPlatform;
float innerScale = 0.94f;
TransformGroup innerTG;
Transform3D scale;
float sphereRadius = 0.9f;
String outFileBase = "offset";
int outFileSeq = 0;
float offScreenScale = 1.0f;
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 wireApp = new Appearance();
ColoringAttributes wireCa = new ColoringAttributes();
wireCa.setColor(black);
wireApp.setColoringAttributes(wireCa);
wirePa = new PolygonAttributes(
PolygonAttributes.POLYGON_LINE,
PolygonAttributes.CULL_BACK,
0.0f);
wireApp.setPolygonAttributes(wirePa);
Sphere outWireSphere = new Sphere(sphereRadius, 0,
15, wireApp);
objTrans.addChild(outWireSphere);
// solid
ColoringAttributes outCa = new
ColoringAttributes(red,
ColoringAttributes.SHADE_FLAT);
Appearance outSolid = new Appearance();
outSolid.setColoringAttributes(outCa);
solidPa = new PolygonAttributes(
PolygonAttributes.POLYGON_FILL,
PolygonAttributes.CULL_BACK,
0.0f);
solidPa.setPolygonOffsetFactor(dynamicOffset);
solidPa.setPolygonOffset(staticOffset);
solidPa.setCapability(PolygonAttributes.ALLOW_OFFSET_WRITE);
outSolid.setPolygonAttributes(solidPa);
Sphere outSolidSphere = new Sphere(sphereRadius, 0,
15, outSolid);
objTrans.addChild(outSolidSphere);
innerTG = new TransformGroup();
innerTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
scale = new Transform3D();
updateInnerScale();
objTrans.addChild(innerTG);
// Create a smaller sphere to go inside. This sphere
has a different
// tesselation and color
Sphere inWireSphere = new Sphere(sphereRadius, 0, 10,
wireApp);
innerTG.addChild(inWireSphere);
// inside solid
ColoringAttributes inCa = new
ColoringAttributes(blue,
ColoringAttributes.SHADE_FLAT);
Appearance inSolid = new Appearance();
inSolid.setColoringAttributes(inCa);
inSolid.setPolygonAttributes(solidPa);
Sphere inSolidSphere = new Sphere(sphereRadius, 0,
10, inSolid);
innerTG.addChild(inSolidSphere);
// 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);
// set up a white background
Background bgWhite = new Background(new
Color3f(1.0f, 1.0f, 1.0f));
bgWhite.setApplicationBounds(bounds);
objTrans.addChild(bgWhite);
// Have Java 3D perform optimizations on this
scene graph.
objRoot.compile();
return objRoot;
}
void updateInnerScale() {
scale.set(innerScale);
innerTG.setTransform(scale);
}
public PolygonOffset() {
this(false);
}
public PolygonOffset(boolean isApplication) {
this.isApplication = isApplication;
}
public void init() {
setLayout(new BorderLayout());
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
JPanel canvasPanel = new JPanel();
GridBagLayout gridbag = new GridBagLayout();
canvasPanel.setLayout(gridbag);
canvas = new Canvas3D(config);
canvas.setSize(600, 600);
add(canvas, BorderLayout.CENTER);
u = new SimpleUniverse(canvas);
if (isApplication) {
offScreenCanvas = new OffScreenCanvas3D(config,
true);
// set the size of the off-screen canvas based on
a scale
// of the on-screen size
Screen3D sOn = canvas.getScreen3D();
Screen3D sOff = offScreenCanvas.getScreen3D();
Dimension dim = sOn.getSize();
dim.width *= offScreenScale;
dim.height *= offScreenScale;
sOff.setSize(dim);
sOff.setPhysicalScreenWidth(sOn.getPhysicalScreenWidth()
*
offScreenScale);
sOff.setPhysicalScreenHeight(sOn.getPhysicalScreenHeight()
*
offScreenScale);
// attach the offscreen canvas to the view
u.getViewer().getView().addCanvas3D(offScreenCanvas);
}
// Create a simple scene and attach it to the virtual
universe
BranchGroup scene = createSceneGraph();
// set the eye at z = 2.0
viewingPlatform = u.getViewingPlatform();
Transform3D vpTrans = new Transform3D();
vpTrans.set(new Vector3f(0.0f, 0.0f, 2.0f));
viewingPlatform.getViewPlatformTransform().setTransform(vpTrans);
// set up a parallel projection with clip limits at 1
and -1
view = u.getViewer().getView();
view.setProjectionPolicy(View.PARALLEL_PROJECTION);
view.setFrontClipPolicy(View.VIRTUAL_EYE);
view.setBackClipPolicy(View.VIRTUAL_EYE);
view.setFrontClipDistance(1.0f);
view.setBackClipDistance(3.0f);
u.addBranchGraph(scene);
// set up the sliders
JPanel guiPanel = new JPanel();
guiPanel.setLayout(new GridLayout(0, 1));
FloatLabelJSlider dynamicSlider = new
FloatLabelJSlider(
"Dynamic Offset", 0.1f, 0.0f, 2.0f, dynamicOffset);
dynamicSlider.addFloatListener(new FloatListener() {
public void floatChanged(FloatEvent e) {
dynamicOffset = e.getValue();
solidPa.setPolygonOffsetFactor(dynamicOffset);
}
});
guiPanel.add(dynamicSlider);
LogFloatLabelJSlider staticSlider = new
LogFloatLabelJSlider(
"Static Offset", 0.1f, 10000.0f, staticOffset);
staticSlider.addFloatListener(new FloatListener() {
public void floatChanged(FloatEvent e) {
staticOffset = e.getValue();
solidPa.setPolygonOffset(staticOffset);
}
});
guiPanel.add(staticSlider);
FloatLabelJSlider innerSphereSlider = new
FloatLabelJSlider(
"Inner Sphere Scale", 0.001f, 0.90f, 1.0f,
innerScale);
innerSphereSlider.addFloatListener(new
FloatListener() {
public void floatChanged(FloatEvent e) {
innerScale = e.getValue();
updateInnerScale();
}
});
guiPanel.add(innerSphereSlider);
if (isApplication) {
JButton snapButton = new JButton("Snap Image");
snapButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e) {
Point loc = canvas.getLocationOnScreen();
offScreenCanvas.setOffScreenLocation(loc);
Dimension dim = canvas.getSize();
dim.width *= offScreenScale;
dim.height *= offScreenScale;
nf.setMinimumIntegerDigits(3);
offScreenCanvas.snapImageFile(
outFileBase + nf.format(outFileSeq++),
dim.width, dim.height);
nf.setMinimumIntegerDigits(0);
}
});
guiPanel.add(snapButton);
}
add(guiPanel, BorderLayout.EAST);
}
public void destroy() {
u.removeAllLocales();
}
//
// The following allows PolygonOffset to be run as
an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new PolygonOffset(true), 950, 600);
}
}
___________________________________________________
--- Frank Wu <[EMAIL PROTECTED]> wrote:
> You have to get the coordinates and offset them,
> then use them to draw a
> wireframe.
>
> Frank
>
> -----Original Message-----
> From: Raúl [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, January 10, 2002 5:53 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA3D] Add lines on the borders of a
> cube
>
>
> ----- Original Message -----
> From: "marco fiocca" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, January 11, 2002 5:27 AM
> Subject: [JAVA3D] Add lines on the borders of a cube
>
>
> > Hello everybody,
> > I have a problem an I don't know how to
> solve it, so I hope that
> someone can
> > help me!
> >
> > I have a cube and at its borders I have to attach
> segments of different
> > colors that emphasize some parts of the borders.
> > I make these segments as LineArrays and I give
> them some coordinates
> lievely
> > different from those of cube's vertices, in a way
> that they are rendered
> in
> > front of the cube's faces when are visible, and
> are adiacent to the
> borders.
> > The problem is that when I rotate the cube some
> lines didn't appear even
> if
> > the correspondent border is visible; this is
> because the coordinates
> between
> > border and line vertices are not exactly the same,
> and so the lines appear
> > more far then the cube face.
> > How can I solve my problem?
> > There's not a way to outline the borders of a cube
> with different colors?
> Not if you use ColorCube from utils package of Sun.
>
>
> >
> > Thanks in advance
> >
> > Marco Fiocca
> >
> >
>
===========================================================================
> > 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".
> >
>
>
===========================================================================
> 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".
>
>
==========================================================================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".
__________________________________________________
Do You Yahoo!?
Send FREE video emails in Yahoo! Mail!
http://promo.yahoo.com/videomail/
===========================================================================
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".
