How to draw an image onto a canvas3d?

Question

hi,
i managed to draw onto a canvas 3d overwriting postRender() of canvas3d.
  public void postRender()
    J3DGraphics2D g = getGraphics2D();
    //  TEST BEGINN
      Image pic = this.getToolkit().createImage("Graphics" + File.separator + "start2.png");
      MediaTracker helpMT = new MediaTracker(this);
      helpMT.addImage(pic,0);
      try{
        helpMT.waitForAll();
      } catch(InterruptedException e) {}
      g.drawImage(pic,10,10,200,200,this);
      g.setColor(Color.yellow);
      g.drawString("yellow",20,300);
      g.setPaintMode();
      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.flush(true);
    //  TEST ENDE
  }However the colors are totally messed up. red is purple, for example, and images are also shown with the wrong colors. What am I doin wrong, and how can I fix it?
thanx,
Usul

Answer 1

Please, Im stuck.
Here are the only two classes needed:
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);
}Where could be the problem?