colors are mixed up when drawing 2d on a canvas3d

Engines, Libraries and Tools Java 3D
#1

hi,

I decided to start a new topic for my problem.

I have to very simple classes. The first one creates a simple universe. The second one extends canvas3d, so that I am able to draw in 2d on top of it. But the colors are all mixed up. Here are my two classes (they compile):

Well, if anyone could take a quick look at these short two classes (they compile and show the problem), I really would appreciate that.

Test2d.class:


import java.awt.*;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.swing.*;
 
public class Test2d extends JFrame
{
  public Test2d ()
  {
    getContentPane().setLayout(new BorderLayout());
    Canvas3D c = new Visual_Canvas3D(SimpleUniverse.getPreferredConfiguration());
    getContentPane().add("Center", c);
    SimpleUniverse simpleU = new SimpleUniverse(c);
    BranchGroup scene = new BranchGroup();
    simpleU.getViewingPlatform().setNominalViewingTransform();
    scene.compile();
    simpleU.addBranchGraph(scene);
  }
 
   public static void main(String[] args)
   {
     Test2d mainApp = new Test2d();
     mainApp.setSize(800,600);
     mainApp.show();
   }
 
}

Visual_Canvas3D.class:


import java.awt.*;
import javax.media.j3d.*;
 
public class Visual_Canvas3D
extends Canvas3D
{
  public Visual_Canvas3D(GraphicsConfiguration gc)
  {
    super(gc);
  }
 
  public void postRender()
  {
   J3DGraphics2D g = getGraphics2D();
 
   g.setColor(Color.red);
   g.drawString("red",20,320);
   g.setColor(Color.green);
   g.drawString("green",20,340);
   g.setColor(Color.orange);
   g.drawString("orange",20,360);
   g.setColor(Color.yellow);
   g.drawString("yellow",20,100);
 
   g.flush(false);
  }
 
}

I really dont know what to do. If anyone could take a quick look (maybe compile), that would really make me happy.

thanx,

Usul

#2

Hmmm, I tested it and it runs good with proper colors! Thus the problem doesn’t seem to be with Java3D! Do you have this occur with other applications too? When drawing a colored geometry?

#3

well, thats strange. but with normal 2d-jcomponent applications everything is fine. i am only having this problem with the canvas3d. ???

Here is my output:

http://www.steffen-kobilke.de/problem.jpg

Edit: As you can see, I added some colors, but otherwise it is still exactly the same sourcecode.

#4

Why don’t you try an applet like HelloUniverse and see wether the color cube is ok or not? It should show the basic colors.

P.S.: Greetings from Germany to Germany :smiley:

#5

The path betrayed me ;D . Gruesse zurueck.

Well, the HelloUniverse example that comes with Java3D shows the cube rotating with the colors yellow, green, blue and red (in that order), and I cant view the top or the bottom in that example. Are these the right colors?

But I already messed around with Java3D a litte, and it seems that the colors are allright, when using pure 3D.

Could you e-mail me your compiled *.class files? Then I could see if maybe my java compiler is messed up. I guess I should re-install it then. Or its something else on my computer, which interfers with java. Hmm. Strange. But plz, e-mail me the compiled *.class files
skobilke@gmx.de

Thanx for helping, in case I havent mentioned.