Hi,
I'm from Italy so please forgive my English.
I'm new at Java3D... in these days I was trying to create an applet that
displays a polygon with LineStripArray... I think I've created the
polygon, but it won't appear on the panel in the browser (I get a black
surface with no line)... I can't locate the problem.... I put here the
code, hoping that someone could tell me how to view what I've created!
thank you very much!

import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.*;
import java.applet.*;
import java.awt.*;

public class GraficaComp extends Applet {

   private Geometry poligono(){
       LineStripArray pol;
       Point3f punti[] = new Point3f[3];
       Color3f colors[] = new Color3f[3];
       int stripCounts[] = {3};

       Color3f red = new Color3f(1.0f, 0.0f, 0.0f);
       Color3f yellow = new Color3f(0.7f, 0.5f, 0.0f);

       punti[0] = new Point3f(1.0f, 1.5f, 1.7f);
       punti[1] = new Point3f(4.2f, 1.7f, 6.2f);
       punti[2] = new Point3f(2.9f, 5.8f, 3.4f);
       
       colors[0] = red;
       colors[1] = yellow;
       colors[2] = red;
       
       pol = new LineStripArray(3, LineStripArray.COORDINATES,
stripCounts);
       
       pol.setCoordinates(0, punti);
       
       return pol;
   }    

    public GraficaComp() {
        setLayout(new BorderLayout());
        Canvas3D superficie = new Canvas3D(null);
        add("Center", superficie);

        BranchGroup scena = createSceneGraph();
        scena.compile();

        SimpleUniverse simpleU = new SimpleUniverse(superficie);

        simpleU.getViewingPlatform().setNominalViewingTransform();

        simpleU.addBranchGraph(scena);
    }

public BranchGroup createSceneGraph(){
       BranchGroup objRoot = new BranchGroup();
              
       objRoot.addChild(new Shape3D(poligono()));
       return objRoot;
    }

public static void main(String[] args){
   Frame frame = new MainFrame(new GraficaComp(), 256, 256);
}    
}   

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