// CubeGL.java
// Andrew Davison, November 2006, ad@fivedots.coe.psu.ac.th

/* A JFrame contains a JPanel which holds a Canvas subclass called
   CubeCanvasGL. The canvas displays a rotating coloured cube
   using active rendering.

   The application is paused when it is minimized or deactivated. 
   The window can be resized.

   The code uses the JSR-231 1.0.0 release build of JOGL, 
   14th September 2006.

   The canvas could be added directly to the JFrame, but this 
   approach allows other components can be included in the JFrame. 
   In this example, there's a textfield which reports the cube 
   rotations in the x,y,z- axes.
*/

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

import javax.media.opengl.*;


public class CubeGL extends JFrame implements WindowListener
{
  private static int DEFAULT_FPS = 80;

  private static final int PWIDTH = 512;   // size of panel
  private static final int PHEIGHT = 512; 

  private CubeCanvasGL canvas;

  private JTextField rotsTF;   // displays cube rotations
  private DecimalFormat df = new DecimalFormat("0.#");  // 1 dp


  public CubeGL(long period) 
  {
    super("CubeGL (Active)");

    Container c = getContentPane();
    c.setLayout( new BorderLayout() );
    c.add( makeRenderPanel(period), BorderLayout.CENTER);

    rotsTF = new JTextField("Rotations: ");
    rotsTF.setEditable(false);
    c.add(rotsTF, BorderLayout.SOUTH);

    addWindowListener(this);

    pack();
    setVisible(true);
  } // end of CubeGL()


  private JPanel makeRenderPanel(long period)
  // construct the canvas, inside a JPanel
  {
    JPanel renderPane = new JPanel();
    renderPane.setLayout( new BorderLayout() );
    renderPane.setOpaque(false);
    renderPane.setPreferredSize( new Dimension(PWIDTH, PHEIGHT));

    canvas = makeCanvas(period);
    renderPane.add(canvas, BorderLayout.CENTER);

    canvas.setFocusable(true);
    canvas.requestFocus();    // the canvas now has focus, so receives key events

    // detect window resizes, and reshape the canvas accordingly
    renderPane.addComponentListener( new ComponentAdapter() {
      public void componentResized(ComponentEvent evt)
      { Dimension d = evt.getComponent().getSize();
        // System.out.println("New size: " + d);
        canvas.reshape(d.width, d.height);
      } // end of componentResized()
    });

    return renderPane;
  }  // end of makeRenderPanel()


  private CubeCanvasGL makeCanvas(long period)
  {
    // get a configuration suitable for an AWT Canvas (for CubeCanvasGL)
    GLCapabilities caps = new GLCapabilities();

    AWTGraphicsDevice dev = new AWTGraphicsDevice(null);
    AWTGraphicsConfiguration awtConfig = (AWTGraphicsConfiguration)
       GLDrawableFactory.getFactory().chooseGraphicsConfiguration(caps, null, dev);

    GraphicsConfiguration config = null;
    if (awtConfig != null)
      config = awtConfig.getGraphicsConfiguration();

    return new CubeCanvasGL(this, period, PWIDTH, PHEIGHT, config, caps);
  } // end of makeCanvas()


  public void setRots(float rotX, float rotY, float rotZ)
  // called from CubeCanvasGL to show cube rotations
  {  rotsTF.setText("Rotations: (" + df.format(rotX) + ", " + 
                                     df.format(rotY) + ", " + 
                                     df.format(rotZ) + ")");  }



  // ----------------- window listener methods -------------

  public void windowActivated(WindowEvent e) 
  { canvas.resumeGame();  }

  public void windowDeactivated(WindowEvent e) 
  {  canvas.pauseGame();  }

  public void windowDeiconified(WindowEvent e) 
  {  canvas.resumeGame();  }

  public void windowIconified(WindowEvent e) 
  {  canvas.pauseGame(); }

  public void windowClosing(WindowEvent e)
  {  canvas.stopGame();  }

  public void windowClosed(WindowEvent e) {}
  public void windowOpened(WindowEvent e) {}

// -----------------------------------------

  public static void main(String[] args)
  { 
    int fps = DEFAULT_FPS;
    if (args.length != 0)
      fps = Integer.parseInt(args[0]);

    long period = (long) 1000.0/fps;
    System.out.println("fps: " + fps + "; period: " + period + " ms");

    new CubeGL(period*1000000L);    // ms --> nanosecs 
  } // end of main()


} // end of CubeGL class

import com.sun.opengl.util.Animator;
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.media.opengl.*;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
import javax.media.opengl.awt.GLCanvas;


/**
 * SimpleJOGL2.java <BR>
 * author: Brian Paul (converted to Java by Ron Cemer and Sven Goethel) <P>
 *
 * This version is equal to Brian Paul's version 1.2 1999/10/21
 */
public class SimpleJOGL implements GLEventListener {

    public static void main(String[] args) {
        Frame frame = new Frame("Simple JOGL Application");
        GLCanvas canvas = new GLCanvas();

        canvas.addGLEventListener(new SimpleJOGL());
        frame.add(canvas);
        frame.setSize(640, 480);
        final Animator animator = new Animator(canvas);
        frame.addWindowListener(new WindowAdapter() {

            @Override
            public void windowClosing(WindowEvent e) {
                // Run this on another thread than the AWT event queue to
                // make sure the call to Animator.stop() completes before
                // exiting
                new Thread(new Runnable() {

                    public void run() {
                        animator.stop();
                        System.exit(0);
                    }
                }).start();
            }
        });
        // Center frame
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        animator.start();
    }

    public void init(GLAutoDrawable drawable) {
        // Use debug pipeline
        // drawable.setGL(new DebugGL(drawable.getGL()));

       GL2 gl = drawable.getGL().getGL2(); 
        System.err.println("INIT GL IS: " + gl.getClass().getName());

        // Enable VSync
        gl.setSwapInterval(1);

        // Setup the drawing area and shading mode
        gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        gl.glShadeModel(GL2.GL_SMOOTH); // try setting this to GL_FLAT and see what happens.
    }

    public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
        GL2 gl = drawable.getGL().getGL2(); 
        GLU glu = new GLU();

        if (height <= 0) { // avoid a divide by zero error!
        
            height = 1;
        }
        final float h = (float) width / (float) height;
        gl.glViewport(0, 0, width, height);
        gl.glMatrixMode(GL2.GL_PROJECTION);
        gl.glLoadIdentity();
        glu.gluPerspective(45.0f, h, 1.0, 20.0);
        gl.glMatrixMode(GL2.GL_MODELVIEW);
        gl.glLoadIdentity();
    }

    public void display(GLAutoDrawable drawable) {
        GL2 gl = drawable.getGL().getGL2(); 

        // Clear the drawing area
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT);
        // Reset the current matrix to the "identity"
        gl.glLoadIdentity();

        // Move the "drawing cursor" around
        gl.glTranslatef(-1.5f, 0.0f, -6.0f);

        // Drawing Using Triangles
        gl.glBegin(GL2.GL_TRIANGLES);
            gl.glColor3f(1.0f, 0.0f, 0.0f);    // Set the current drawing color to red
            gl.glVertex3f(0.0f, 1.0f, 0.0f);   // Top
            gl.glColor3f(0.0f, 1.0f, 0.0f);    // Set the current drawing color to green
            gl.glVertex3f(-1.0f, -1.0f, 0.0f); // Bottom Left
            gl.glColor3f(0.0f, 0.0f, 1.0f);    // Set the current drawing color to blue
            gl.glVertex3f(1.0f, -1.0f, 0.0f);  // Bottom Right
        // Finished Drawing The Triangle
        gl.glEnd();

        // Move the "drawing cursor" to another position
        gl.glTranslatef(3.0f, 0.0f, 0.0f);
        // Draw A Quad
        gl.glBegin(GL2.GL_QUADS);
            gl.glColor3f(0.5f, 0.5f, 1.0f);    // Set the current drawing color to light blue
            gl.glVertex3f(-1.0f, 1.0f, 0.0f);  // Top Left
            gl.glVertex3f(1.0f, 1.0f, 0.0f);   // Top Right
            gl.glVertex3f(1.0f, -1.0f, 0.0f);  // Bottom Right
            gl.glVertex3f(-1.0f, -1.0f, 0.0f); // Bottom Left
        // Done Drawing The Quad
        gl.glEnd();

        // Flush all drawing operations to the graphics card
        gl.glFlush();
    }

     public void dispose(GLAutoDrawable drawable){}
    
    public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {
    }
}