/**
 * Unterricht #1 - AWT Fenster mit OpenGl-Unterstützung
 * zeichnet dabei ein Viereck
 */
package cg;

import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import com.jogamp.opengl.GL2;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.awt.GLCanvas;

/**
 * @author tavkhelidze
 *
 */
public class Main implements GLEventListener {

	      //setting frame size inputs
	      static int width = 800;
	      static int height = 600;

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		 
		 /* -------------------- OpenGL context -------------------*/
		//instantiating OpenGL functionality
	      final GLProfile profile = GLProfile.get(GLProfile.GL2);
	      GLCapabilities capabilities = new GLCapabilities(profile);
	  
	      //creating canvas and attaching the listener for OpenGL-Events to it
	      final GLCanvas glcanvas = new GLCanvas(capabilities);
	      glcanvas.addGLEventListener(new Main());

		  /* -------------------- FRAME -------------------*/
	      //creating frame
	      final Frame frame = new Frame ("AWT OpenGL-Fenster");
	  
	  	  //setting visibility and sizes to frame:
	      frame.setSize(width, height);
	      frame.setVisible(true);
	  
	      //adding canvas to frame
	      frame.add(glcanvas);
	      
	    //adding Window-events Listener to the frame
	      frame.addWindowListener(new WindowAdapter()
	    		  {
	    	  public void windowClosing(WindowEvent arg0)
	    	  {
	    		  System.exit(0);
	    	  }
	    		  });
	      
	}

	@Override
	public void init(GLAutoDrawable drawable) {
		// TODO Auto-generated method stub
		
		GL2 gl = drawable.getGL().getGL2();

		//Mit diesem Befehl setzt sich eine andere Farbe (mit Gleitkommazahlen als Parameter,die dem RGBA-Format entsprechen)
		gl.glClearColor(0.000f, 0.749f, 1.000f, 1.0f);
		
	}

	@Override
	public void dispose(GLAutoDrawable drawable) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void display(GLAutoDrawable drawable) {
		// TODO Auto-generated method stub
		
			GL2 gl = drawable.getGL().getGL2();

	      gl.glClear(GL2.GL_COLOR_BUFFER_BIT);     
	      
		  
	      gl.glBegin( GL2.GL_QUADS ); // Start Drawing the quad
	
	      gl.glVertex3f( 0.5f, -0.5f, -0.5f ); // Bottom Left Of the Quad 
	      gl.glVertex3f( -1.0f, -0.5f, -0.5f ); // Bottom Right Of the Quad
	      gl.glVertex3f( -1.0f, 0.5f, -0.5f ); // Top Right Of the Quad 
	      gl.glVertex3f( 0.5f, 0.5f, -0.5f ); // Top Left Of the Quad
	      
	      gl.glEnd();
		
	}

	@Override
	public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
		// TODO Auto-generated method stub
		
	}

}