import java.applet.Applet;
import java.awt.Graphics;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

// must import jgl.GL....
import jgl.GL;
import jgl.GLAUX;

public class cube extends Applet
		  implements ComponentListener {
    // must use GL to use jGL.....
    // and use GLAUX to use the aux functions.....
    // remember to give GL to initialize GLAUX
    GL myGL = new GL ();
    GLAUX myAUX = new GLAUX (myGL);

    private void display () {
	myGL.glClear (GL.GL_COLOR_BUFFER_BIT);
	myGL.glColor3f (1.0f, 1.0f, 1.0f);
	myGL.glLoadIdentity ();			/* clear the matrix */
	myGL.glTranslatef (0.0f, 0.0f, -5.0f);
						/* viewing transformation */
	myGL.glScalef (1.0f, 2.0f, 1.0f); 
						/* modeling transformation */
	myAUX.auxWireCube (1.0);		/* draw the cube */
	myGL.glFlush ();
    }

    private void myinit () {
	myGL.glShadeModel (GL.GL_FLAT);
    }

    public void componentMoved (ComponentEvent e) {}
    public void componentShown (ComponentEvent e) {}
    public void componentHidden (ComponentEvent e) {}

    public void componentResized (ComponentEvent e) {
        // get window width and height by myself
	myReshape (getSize ().width, getSize ().height);
        display ();
	repaint ();
    }

    private void myReshape (int w, int h) {
	myGL.glMatrixMode (GL.GL_PROJECTION);	/* prepare for and then */
	myGL.glLoadIdentity ();			/* define the projection */
	myGL.glFrustum (-1.0f,  1.0f,		/* transformation */
			-1.0f,  1.0f,
			 1.5f, 20.0f);
	myGL.glMatrixMode (GL.GL_MODELVIEW);	/* back to modelview matrix */
	myGL.glViewport (0, 0, w, h);		/* define the viewport */
    }
	
    public void update (Graphics g) {
    	// skip the clear screen command....
	paint (g);
    }

    public void paint (Graphics g) {
	myGL.glXSwapBuffers (g, this);
    }

    public void init () {
	myAUX.auxInitPosition (0, 0, 500, 500);
	myAUX.auxInitWindow (this);
	myinit ();

	// as call auxReshapeFunc()
	addComponentListener (this);
	myReshape (getSize ().width, getSize ().height);

	// call display as call auxMainLoop(display);
	display ();
    }

}