import java.awt.event.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
import javax.media.opengl.*;
import javax.media.opengl.glu.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.texture.*;

public class Lesson06 {
	public static void main(String args[]){
		JFrame frame = new JFrame("Lesson06");
		GLCanvas canvas = new GLCanvas();
		frame.add(canvas);
		
		final Animator animator = new Animator(canvas);
		canvas.addGLEventListener(new Lesson06Renderer());
		frame.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				animator.stop();
				System.exit(0);
			}
		});
		frame.setVisible(true);
		frame.setBounds(0, 0, 640+frame.getInsets().left+frame.getInsets().right, 480+frame.getInsets().top+frame.getInsets().bottom);
		frame.requestFocus();
		animator.start();
	}
}

class Lesson06Renderer implements GLEventListener{
	public void init(GLAutoDrawable drawable){
		final GL gl = drawable.getGL();
		gl.glShadeModel(GL.GL_SMOOTH);
		gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
		gl.glClearDepth(1.0f);
		gl.glEnable(GL.GL_DEPTH_TEST);
		gl.glDepthFunc(GL.GL_LEQUAL);
		gl.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
		gl.glEnable(GL.GL_TEXTURE_2D);
			
		Texture tex;
		try {
		  tex = TextureIO.newTexture(TextureIO.newTextureData(ImageIO.read(new File("NeHe.png")), false));
		} catch (IOException ioe) {
		  //handle error
		}
	}
	
	public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height){
		final GL gl = drawable.getGL();
		final GLU glu = new GLU();
		
		if(height <= 0)height = 1;
		float h = (float)width / (float)height;
		gl.glViewport(0, 0, width, height);
		gl.glMatrixMode(GL.GL_PROJECTION);
		gl.glLoadIdentity();
		glu.gluPerspective(45.0, h, 0.2, 20.0);
		gl.glMatrixMode(GL.GL_MODELVIEW);
		gl.glLoadIdentity();
	}
	
	public void display(GLAutoDrawable drawable){
		final GL gl = drawable.getGL();
		
		gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
		gl.glLoadIdentity();
				
		gl.glTranslatef(0, 0, -6);
								
		gl.glBegin(GL.GL_QUADS);
			gl.glTexCoord2f(0.0f, 0.0f);gl.glVertex3f(-1.0f, -1.0f, 1.0f);
			gl.glTexCoord2f(1.0f, 0.0f);gl.glVertex3f(1.0f, -1.0f, 1.0f);
			gl.glTexCoord2f(1.0f, 1.0f);gl.glVertex3f(1.0f, 1.0f, 1.0f);
			gl.glTexCoord2f(0.0f, 1.0f);gl.glVertex3f(-1.0f, 1.0f, 1.0f);
		gl.glEnd();
	
	}
	
	public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged){}
}