import java.applet.Applet;
import java.awt.*;
import go.*;

//
// GoSquare class containing data representing a square,
// and a render method for drawing the square.
//

class GoSquare extends GoInterface
{
    GoTriangleFan  data;

    GoSquare()
    {
        data = new GoTriangleFan(4);

        data.xyz(0, -0.5, -0.5, 0.0);
        data.xyz(1,  0.5, -0.5, 0.0);
        data.xyz(2,  0.5,  0.5, 0.0);
        data.xyz(3, -0.5,  0.5, 0.0);
    }

    //
    // Interface render method.
    //
    public void render()
    {
        go.clear(Go.IMAGE);
        go.render(data);
        swap();
    }
}

//
// Java applet
//

public class square extends Applet
{
    public void init()
    {
        setLayout(new GridLayout(1, 1));
        add("Center", new GoSquare());
    }
}