[JAVA3D] Nice and Easy problem (hopefully)

[Ben Logan]

Hi
I havent used geometry in J3D for a few months and I can't work out why
my polygons are rendering in a weird fashion...
Have half the polygon (a triangle) is rendering in red fine, the other
half doesn't appear!

Code;

Point3f[] pts = new Point3f[4];
    pts[0] = gridPoints[from];
    pts[1] = gridPoints[to];
    System.out.println("BOTTOM LEFT: " + gridPoints[from]);
    System.out.println("BOTTOM RIGHT: " + gridPoints[to]);

    float x = gridPoints[from].x;
    float y = gridPoints[from].y;
    float z = gridPoints[from].z;
    pts[2] = new Point3f(x,y+1,z);
    System.out.println("TOP LEFT: (" + x + " " + (y+1) + " " + z + ")");

    x = gridPoints[to].x;
    y = gridPoints[to].y;
    z = gridPoints[to].z;
    pts[3] = new Point3f(x,y+1,z);
    System.out.println("TOP RIGHT: (" + x + " " + (y+1) + " " + z +
")");

    int[] indices = {
        0,1,2,3
    };

    GeometryInfo gi = new GeometryInfo(GeometryInfo.QUAD_ARRAY);
    gi.setCoordinates(pts);
    gi.setCoordinateIndices(indices);

    Shape3D wall = new Shape3D();
    wall.setGeometry(gi.getGeometryArray());

    Appearance appear = new Appearance();
    ColoringAttributes redColoring = new ColoringAttributes(red,
ColoringAttributes.SHADE_FLAT);
    appear.setColoringAttributes(redColoring);
    wall.setAppearance(appear);

    wallGroup.addChild(wall);

Rather than waste any more time on this, I was hoping some could point
out the obvious to me, thanks in advance 
(PS its not a points problem)

********************************************
Ben Logan - Graduate Software Engineer
RCID
Stephenson Building
Newcastle Upon Tyne
NE1 7RU
www.rcid.ncl.ac.uk
******************************************** 

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