import java.awt.event.*;
import javax.swing.*;

import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;

public class light//
        extends glskeleton//
        implements GLEventListener//
        , KeyListener//
{
    private GLUT glut;
    
    //
    /**
     * This program demonstrates the use of the OpenGL lighting model. A sphere
     * is drawn using a grey material characteristic. A single light source
     * illuminates the object.
     *
     * @author Kiet Le (Java conversion)
     */
    public light() {
    }
    
    public static void main(String[] args) {
        GLCapabilities caps = new GLCapabilities();
        GLJPanel canvas = new GLJPanel(caps);
        light demo = new light();
        demo.setCanvas(canvas);
        canvas.addGLEventListener(demo);
        demo.setDefaultListeners(demo);
        
//        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame frame = new JFrame("light");
        frame.setSize(500, 500);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        frame.getContentPane().add(canvas);
        frame.setVisible(true);
        canvas.requestFocusInWindow();
    }
    
    /*
     * Initialize material property, light source, lighting model, and depth
     * buffer.
     */
    public void init(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        glut = new GLUT();
        //
        float mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
        float mat_shininess[] = { 50.0f };
        float light_position[] = { 1.0f, 1.0f, 1.0f, 0.0f };
        //
        gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        gl.glShadeModel(GL.GL_SMOOTH);
        //
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat_specular, 0);
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_SHININESS, mat_shininess, 0);
        gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, light_position, 0);
        //
        gl.glEnable(GL.GL_LIGHTING);
        gl.glEnable(GL.GL_DEPTH_TEST);
        gl.glDepthFunc(GL.GL_LESS);
        gl.glEnable(GL.GL_LIGHT0);

	// light 1
	float light1_ambient[] = { 0.2f, 0.2f, 0.2f, 1.0f };
	float light1_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
	float light1_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
	float light1_position[] = { -1.0f, 1.0f, 1.0f, 1.0f };
 	float spot_direction[] = { 1.0f, -1.0f, 0.0f };

	gl.glLightfv(GL.GL_LIGHT1, 
		     GL.GL_AMBIENT, 
		     light1_ambient,
		     0);
	gl.glLightfv(GL.GL_LIGHT1, 
		     GL.GL_DIFFUSE, 
		     light1_diffuse,
		     0);
	gl.glLightfv(GL.GL_LIGHT1, 
		     GL.GL_SPECULAR, 
		     light1_specular,
		     0);
	gl.glLightfv(GL.GL_LIGHT1, 
		     GL.GL_POSITION, 
		     light1_position,
		     0);
	gl.glLightf(GL.GL_LIGHT1, 
		    GL.GL_CONSTANT_ATTENUATION, 
		    0.5f);
	gl.glLightf(GL.GL_LIGHT1, 
		    GL.GL_LINEAR_ATTENUATION, 
		    0.3f);
	gl.glLightf(GL.GL_LIGHT1, 
		    GL.GL_QUADRATIC_ATTENUATION, 
		    0.1f);
	gl.glLightf(GL.GL_LIGHT1, 
		    GL.GL_SPOT_CUTOFF, 
		    45.0f);
	gl.glLightfv(GL.GL_LIGHT1, 
		    GL.GL_SPOT_DIRECTION,
		    spot_direction,
		    0);
//         gl.glEnable(GL.GL_LIGHT1);
    }
    
    public void display(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        //
        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        gl.glColor4d(1, 0, 0, 0);
        glut.glutSolidSphere(1.0, 20, 20);
        gl.glFlush();
    }
    
    public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) {
        GL gl = drawable.getGL();
        //
        gl.glViewport(0, 0, w, h);
        gl.glMatrixMode(GL.GL_PROJECTION);
        gl.glLoadIdentity();
        if (w <= h) //
            gl.glOrtho(-1.5, 1.5,//
                    -1.5 * (float) h / (float) w,//
                    1.5 * (float) h / (float) w,//
                    -10.0, 10.0);
        else
            gl.glOrtho(-1.5 * (float) w / (float) h, //
                    1.5 * (float) w / (float) h, //
                    -1.5, 1.5, -10.0, 10.0);
        gl.glMatrixMode(GL.GL_MODELVIEW);
        gl.glLoadIdentity();
    }
    
    public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
            boolean deviceChanged) {
    }
    
    public void keyTyped(KeyEvent key) {
    }
    
    public void keyPressed(KeyEvent key) {
        switch (key.getKeyCode()) {
            case KeyEvent.VK_ESCAPE:
                super.runExit();
                break;
                
            default:
                break;
        }
    }
    
    public void keyReleased(KeyEvent key) {
    }
    
}