/**
 * 
 */
package cg;

import javax.swing.JFrame;

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;

import com.jogamp.opengl.glu.GLU;

/**
 * @author
 *
 */

/**
 * JOGL Example #: 3D Shapes - two solid cubes (using push & pop)
 */
public class Main implements GLEventListener {

	/**
	 * @param args
	 */
	private GLU glu = new GLU();
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		 
		//instantiating OpenGL functionality
	      final GLProfile profile = GLProfile.get(GLProfile.GL2);
	      GLCapabilities capabilities = new GLCapabilities(profile);
	  
	      //creating canvas
	      final GLCanvas glcanvas = new GLCanvas(capabilities);

	      //setting frame size inputs
	      final int width = 800;
	      final int height = 600;
	     
	      Main m = new Main();
	      glcanvas.addGLEventListener(m);
	  
	      //creating frame
	      final JFrame frame = new JFrame ("OpenGL Fenster");
	  
	      //adding canvas to frame
	      frame.getContentPane().add(glcanvas);
	      
	      //setting visibility and sizes to frame:
	      frame.setSize(width, height);
	      frame.setVisible(true);

	      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	@Override
	public void init(GLAutoDrawable drawable) {
		GL2 gl = drawable.getGL().getGL2();
		
		gl.glClearColor(0.000f, 0.749f, 1.000f, 1.0f);
		
	    gl.glEnable(GL2.GL_DEPTH_TEST);	
	}

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

	@Override
	public void display(GLAutoDrawable drawable) {
		GL2 gl = drawable.getGL().getGL2();
		
		gl.glClear(GL2.GL_DEPTH_BUFFER_BIT);   
	      
	    gl.glMatrixMode(GL2.GL_MODELVIEW);
	    gl.glLoadIdentity();
	    
	    gl.glTranslatef(0.0f, 0.0f, -10.0f);
	    
	    gl.glPushMatrix();
	    
	    gl.glTranslatef(-2.0f, 0.0f, 0.0f);
	    gl.glRotatef(45.0f, 0.0f, 1.0f, 0.0f);
	    
		drawCube(gl);
		
		gl.glPopMatrix();
		
	    gl.glTranslatef(2.0f, 0.0f, 0.0f);
	    gl.glRotatef(45.0f, 1.0f, 0.0f, 0.0f);
	    
	    drawCube(gl);
	}

	@Override
	public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
		final GL2 gl = drawable.getGL().getGL2();
		
	    final float h = (float) width / (float) height;
	      
	    gl.glMatrixMode(GL2.GL_PROJECTION);
	    gl.glLoadIdentity();
	    glu.gluPerspective(45.0f, h, 1.0, 20.0);
	}

	// Würfel
	//	  v6----- v5
	//	 /|      /|
	//	v1------v0|
	//	| |     | |
	//	| v7----|-v4
	//	|/      |/
	//	v2------v3
	public void drawCube(GL2 gl) {
		gl.glBegin(GL2.GL_QUADS);
			
			gl.glColor3f(1f, 0f, 0f); //red color
			gl.glVertex3f(1.0f, 1.0f, -1.0f); // v5 Top Right (Top)
	 		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // v6 Top Left (Top)
	  		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // v1 Bottom Left (Top)
	 		gl.glVertex3f(1.0f, 1.0f, 1.0f); // v0 Bottom Right (Top)

		    gl.glColor3f(0f, 1f, 0f); //green color
	  		gl.glVertex3f(1.0f, -1.0f, 1.0f); // v3 Top Right (Bottom) 
	  		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // v2 Top Left (Bottom)
	  		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // v7 Bottom Left (Bottom)
	  		gl.glVertex3f(1.0f, -1.0f, -1.0f); // v4 Bottom Right (Bottom)

		    gl.glColor3f(0f, 0f, 1f); //blue color
	  		gl.glVertex3f(1.0f, 1.0f, 1.0f); // v0 Top Right (Front)
	  		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // v1 Top Left (Front)
	  		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // v2 Bottom Left (Front) 
	 		gl.glVertex3f(1.0f, -1.0f, 1.0f); // v3 Bottom Right (Front)

		    gl.glColor3f(1f, 1f, 0f); //yellow (red + green)
	  		gl.glVertex3f(1.0f, -1.0f, -1.0f); // v4 Bottom Left (Back)
	  		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // v7 Bottom Right (Back)
	 		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // v6 Top Right (Back)
	 		gl.glVertex3f(1.0f, 1.0f, -1.0f); // v5 Top Left (Back)

		    gl.glColor3f(1f, 0f, 1f); //purple (red + green)
	 		gl.glVertex3f(-1.0f, 1.0f, 1.0f); // v1 Top Right (Left)
	 		gl.glVertex3f(-1.0f, 1.0f, -1.0f); // v6 Top Left (Left)
	  		gl.glVertex3f(-1.0f, -1.0f, -1.0f); // v7 Bottom Left (Left)
	  		gl.glVertex3f(-1.0f, -1.0f, 1.0f); // v2 Bottom Right (Left)

		    gl.glColor3f(0f, 1f, 1f); //sky blue (blue + green)
	  		gl.glVertex3f(1.0f, 1.0f, -1.0f); // v5 Top Right (Right)
	  		gl.glVertex3f(1.0f, 1.0f, 1.0f); // v0 Top Left (Right)
	 		gl.glVertex3f(1.0f, -1.0f, 1.0f); // v3 Bottom Left (Right)
	  		gl.glVertex3f(1.0f, -1.0f, -1.0f); // v4 Bottom Right (Right)
	      
	     gl.glEnd();
	}

}