import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.*;
import java.io.*;
import java.util.*;
import gl4java.GLContext;
import gl4java.awt.GLCanvas;

import gl4java.utils.glut.*;

public class ex4a extends Applet 
{
    exampleCanvas canvas = null;
    jooglRealTimeClock rtClock = null;
    jooglTransform tempTrans, permTrans;
    
    /**
     * void init()
     *
     * Initialise the applet.
     */
    public void init()
    {
        Dimension d = getSize();

        //We will use BorderLayout to layout the applet components
        setLayout(new BorderLayout());

        //Create our canvas and add it to the center of the applet
        canvas = new exampleCanvas(d.width, d.height);
        add("Center", canvas);
        
        /* retrieve the root object */
        jooglRoot root = new jooglRoot();
        canvas.addRoot(root);
        rtClock = ((jooglRealTimeClock)(canvas.getClock()));

        /* create a camera */
        jooglCamera camera = 
            new jooglPerspectiveCamera(0.0, 0.0, 30.0, /* eye is at (0,0,30) */
	 		   0.0, 0.0, 0.0, /* center is at (0,0,0) */
			   0.0, 1.0, 0.0, /* up is in positive Y direction */
			   40.0, /* field of view in degree */ 
			   1.0, /* Z near */
			   100.0);/* Z far */
        root.setCamera(camera);
        root.setShadeMode(new jooglShadeMode(jooglShadeMode.SMOOTH));
        
        /* create an ambient light and add it to the scene graph. */
        jooglAmbientLight lightAmb = new jooglAmbientLight(0.2, 0.2, 0.2);
        root.add(lightAmb);
    

        /***********************
         * Create two point light sources, with little icons for them (small spheres)
         ***********************/
        jooglGroup group1 = new jooglGroup();
        root.add(group1);

        /* Next add a small green sphere to group1, and translate it to (6,3,3) */
        jooglSphere sphere1 = new jooglSphere(0.25, 10);
        sphere1.setTransform(new jooglTransform().translate(8.0, 0.0, 5.0));
        sphere1.setMaterial(new jooglMaterial(0.2, 1.0, 0.2, 0.8));

        jooglLight light1 = 
            new jooglSpotLight(0.6, 3.5, 0.4, /* green-tinted */
                                8.0, 0.0, 5.0, /* out on the x axis */
                                -6.0, 0.0, -5.0,
                                1.0, 0.3, 0.1,
                                25.0, 2.0);
        group1.add(sphere1);
        group1.add(light1);
        
        /* Next add a small red sphere to group1, and translate it to (-6,-3,-3) */
        jooglSphere sphere2 = new jooglSphere(0.25, 10);
        sphere2.setTransform(new jooglTransform().translate(-6.0, -3.0, -3.0));
        sphere2.setMaterial(new jooglMaterial(1.0, 0.2, 0.2, 0.8));

        jooglLight light2 = 
            new jooglPositionalLight(1.5, 0.4, 0.6, /* red-tinted */
				   -6.0, -3.0, -3.0, /* out on the x axis */
				   1.0, 0.0, 0.0);
        group1.add(sphere2);
        group1.add(light2);
        
        /* create a group and add it to the root. */
        jooglGroup group3 = new jooglGroup();
        jooglGroup group2 = new jooglGroup();
	root.add(group3);
        group3.add(group2);
        
        permTrans = new jooglTransform();
        tempTrans = new jooglTransform();
        group2.setTransform(permTrans);
        group3.setTransform(tempTrans);
        
        jooglDrawMode[] dm = new jooglDrawMode[3];
        dm[0] = new jooglDrawMode(jooglDrawMode.LINE);
        dm[1] = new jooglDrawMode(jooglDrawMode.POINT);
        dm[2] = new jooglDrawMode(jooglDrawMode.FILL);
        
        for (int i = 0; i<3; i++) 
        {
            jooglGeometry obj = new jooglCube(2.0);
            obj.setDrawMode(dm[i]);
            jooglTransform t = new jooglTransform().translate(5.0 - 6.0 * i , 5.0, 0.0);
            t.rotateY(-45.0);
            obj.setTransform(t);
            group2.add(obj);
            
            obj = new jooglTeapot(2.0);
            obj.setDrawMode(dm[i]);
            t = new jooglTransform().translate(5.0 - 6.0 * i , 0.0, 0.0);
            t.rotateY(30.0);
            obj.setTransform(t);
            group2.add(obj);
            
            obj = new jooglSphere(1.5,30);
            obj.setDrawMode(dm[i]);
            t = new jooglTransform().translate(5.0 - 6.0 * i , -5.0, 0.0);
            obj.setTransform(t);
            group2.add(obj);
        }
    }


    /**
     * void start()
     *
     * Start the applet.
     */
    public void start()
    {
    }


    /**
     * void stop()
     *
     * Stop the applet.
     */
    public void stop()
    {
    }

    /* main, for when it is run from the command line. 
     * Set up a window for the "applet" to run in.
     */
    public static void main( String args[] ) {
	ex4a applet = new ex4a();

	Frame f = new Frame("CS4451A Joogl Example 4A");
	f.addWindowListener( new WindowAdapter() {
		public void windowClosed(WindowEvent e)
		{
		    System.exit(0);
		}
		public void windowClosing(WindowEvent e)
		{
		    windowClosed(e);
		}
	    });

	f.setLayout(new BorderLayout());
	f.add("Center", applet);
	applet.setSize(500,300);
	applet.init();
	applet.start();
	Dimension ps = applet.getPreferredSize();
	f.setBounds(-100,-100,99,99);
	f.setVisible(true);
	f.setVisible(false);
	f.setVisible(true);
	Insets i = f.getInsets();
	f.setBounds(0,0, ps.width+i.left+i.right, 
		    ps.height+i.top+i.bottom);
	f.setVisible(true);
    }

    /* GLCanvas class for this application.     
     * We would use GLAnimCanvas because if we wanted the canvas
     * to be constantly redrawn.
     */
    private class exampleCanvas extends jooglCanvas implements MouseListener, MouseMotionListener
    {
        public exampleCanvas(int w, int h)
        {
            super(w, h);
        }

        /**
         * void preInit()
         *
         * Called just BEFORE the GL-Context is created.
         */
        public void preInit()
        {
            // initialize joogl
            super.preInit();
            
            addMouseMotionListener(this);
        }

        protected int x0;
        protected int y0;

        protected void newposition(int x, int y)
        {
            float dx = ((float)(x - x0))/5.0f;
            float dy = ((float)(y - y0))/5.0f;
            
            tempTrans.setIdentity();
            tempTrans.rotateX(dy);
            tempTrans.rotateY(-dx);
        }
        
        /*
	 * Methods required for the implementation of MouseMotionListener
	 */
        public void mouseMoved(MouseEvent evt)
        {
        }
    
        public void mouseDragged(MouseEvent evt)
        {
	    int x1 = evt.getX();
	    int y1 = evt.getY();

            newposition(x1, y1);
	    repaint();
        }

        /*
	 * Methods required for the implementation of MouseListener
	 */
        public void mouseEntered(MouseEvent evt)
        {
        }
    
        public void mouseExited(MouseEvent evt)
        {
        }
    
        public void mousePressed(MouseEvent evt)
        {
            x0 = evt.getX();
	    y0 = evt.getY();
        }
    
        public void mouseReleased(MouseEvent evt)
        {
	    int x1 = evt.getX();
	    int y1 = evt.getY();

            newposition(x1, y1);
            
            permTrans.multiply(tempTrans);
            tempTrans.setIdentity();
            
	    repaint();
        }
    
        public void mouseClicked(MouseEvent evt)
        {
	}
    }
}