Patricio,
Attached is an example of the Graphics2D operations in Java3D.
Also, the following is excerpted from Java3D 1.2 API Documentation,
" The J3DGraphics2D class extends Graphics2D to provide 2D rendering
into a Canvas3D. It is an abstract base class that is
further extended by a non-public Java 3D implementation class. This
class allows Java 2D rendering to be mixed with Java 3D
rendering in the same Canvas3D, subject to the same restrictions as
imposed for 3D immediate-mode rendering: In
mixed-mode rendering, all Java 2D requests must be done from one of
the Canvas3D callback methods; in pure-immediate
mode, the Java 3D renderer must be stopped for the Canvas3D being
rendered into."
Graphics2D only applies to Immediate-mode and Mixed-mode, not Retained-mode.
Enjoy, Jean
Java 3D Team
Sun Microsystems
>Date: Fri, 26 May 2000 13:53:51 +0200
>From: Patricio Inostroza <[EMAIL PROTECTED]>
>Subject: [JAVA3D] Graphics2D operations. Searching an example ?
>To: [EMAIL PROTECTED]
>
>Hi,
>
>Somebody have an example and/or some hints of the Graphics2D
>operations in Java3D?
>
>something like:
>
>...
>Canvas3D c = new Canvas3D (config);
>....
>J3DGraphics2D g2d = canvas.getGraphics2D();
>...
>
>// and now I want to draw in 2D... but, how ? where ?
>
>
>Thank you
>
>Pato I.
>[EMAIL PROTECTED]
/*
* @(#)HelloUniverse.java 1.48 00/02/10 13:14:09
*
* 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.BorderLayout;
import java.awt.event.*;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.awt.font.TextLayout;
import java.awt.font.FontRenderContext;
import java.io.*;
import java.util.*;
public class HelloUniverse extends Applet {
public BranchGroup createSceneGraph(Canvas3D canvas) {
// 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 simple shape leaf node, add it to the scene graph.
objTrans.addChild(new ColorCube(0.4));
// 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;
}
class HelloCanvas3D extends Canvas3D {
private GraphicsContext3D gc;
private J3DGraphics2D g2 = null;
private Dimension d = new Dimension(0, 0);
public HelloCanvas3D(GraphicsConfiguration gcfg) {
super(gcfg,false);
}
public void postRender() {
if (g2 == null) {
g2 = this.getGraphics2D();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
}
this.getSize(d);
drawDemo(d.width, d.height, g2);
g2.flush(true);
}
}
public void drawDemo(int w, int h, J3DGraphics2D g2) {
FontRenderContext frc = g2.getFontRenderContext();
Font font = g2.getFont();
TextLayout tl = new TextLayout("Dashes", font, frc);
float sw = (float) tl.getBounds().getWidth();
float sh = (float) tl.getAscent() + tl.getDescent();
g2.setColor(Color.green);
tl.draw(g2, (float) (w/2-sw/2), sh+5);
BasicStroke dotted = new BasicStroke(3, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND, 0, new float[]{0,6,0,6}, 0);
g2.setStroke(dotted);
g2.drawRect(3,3,w-6,h-6);
int x = 0; int y = h-34;
BasicStroke bs[] = new BasicStroke[6];
float j = 1.1f;
for (int i = 0; i < bs.length; i++, j += 1.0f) {
float dash[] = { j };
BasicStroke b = new BasicStroke(1.0f, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER, 10.0f, dash, 0.0f);
g2.setStroke(b);
g2.drawLine(20, y, w-20, y);
bs[i] = new BasicStroke(3.0f, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER, 10.0f, dash, 0.0f);
y += 5;
}
Shape shape = null;
y = 0;
for (int i = 0; i < 6; i++) {
x = (i == 0 || i == 3) ? (w/3-w/5)/2 : x + w/3;
y = (i <= 2) ? (int) sh+h/12 : h/2;
g2.setStroke(bs[i]);
g2.translate(x, y);
switch (i) {
case 0 : shape = new Arc2D.Float(0.0f, 0.0f, w/5, h/4, 45, 270,
Arc2D.PIE);
break;
case 1 : shape = new Ellipse2D.Float(0.0f, 0.0f, w/5, h/4);
break;
case 2 : shape = new RoundRectangle2D.Float(0.0f, 0.0f, w/5, h/4,
10.0f, 10.0f);
break;
case 3 : shape = new Rectangle2D.Float(0.0f, 0.0f, w/5, h/4);
break;
case 4 : shape = new QuadCurve2D.Float(0.0f,0.0f,w/10, h/2,w/5,0.0f);
break;
case 5 : shape = new CubicCurve2D.Float(0.0f,0.0f,w/15,h/2,
w/10,h/4,w/5,0.0f);
break;
}
g2.draw(shape);
g2.translate(-x, -y);
}
}
public HelloUniverse() {
setLayout(new BorderLayout());
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
HelloCanvas3D c = new HelloCanvas3D(config);
add("Center", c);
// Create a simple scene and attach it to the virtual universe
BranchGroup scene = createSceneGraph(c);
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 HelloUniverse to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new HelloUniverse(), 256, 256);
}
}
