import java.awt.event.*;

import javax.swing.*;

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

/*
 * Created on 29/07/2006
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */                                                                             

/**
 * Alpha3D.java
 * This program demonstrates how to intermix opaque and alpha blended polygons
 * in the same scene, by using glDepthMask. Pressing the left mouse button
 * toggles the eye position.
 * 
 * @ported to java by Wu Shin-Ting
 * 
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

public class Alpha3D//
        extends JFrame//
        implements GLEventListener//
        , KeyListener//
        , MouseListener //
{
    private GLU glu;
    private GLUT glut;

    private boolean eyePosition = false;

    //
    public Alpha3D() {
    }

    public static void main(String[] args) {
        GLCapabilities caps = new GLCapabilities();
        caps.setSampleBuffers(true);// enable sample buffers for aliasing
        caps.setNumSamples(caps.getNumSamples() * 2);

        GLJPanel canvas = new GLJPanel(caps);
        Alpha3D demo = new Alpha3D();
        canvas.addGLEventListener(demo);
        if (demo instanceof KeyListener)
            canvas.addKeyListener(demo);
        if (demo instanceof MouseListener)
            canvas.addMouseListener(demo);
        //
        JFrame.setDefaultLookAndFeelDecorated(true);
        JFrame frame = new JFrame("Alpha3D");
        frame.setSize(500, 500);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().add(canvas);
        frame.setVisible(true);
        canvas.requestFocusInWindow();
    }

    public void init(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        glu = new GLU();
        glut = new GLUT();
        //
        float mat_ambient[] = { 0.0f, 0.0f, 0.0f, 0.15f };
        float mat_specular[] = { 1.0f, 1.0f, 1.0f, 0.15f };
        float mat_shininess[] = { 15.0f };

        gl.glMaterialfv(GL.GL_FRONT, GL.GL_AMBIENT, mat_ambient, 0);
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_SPECULAR, mat_specular, 0);
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_SHININESS, mat_shininess, 0);

        gl.glEnable(GL.GL_LIGHTING);
        gl.glEnable(GL.GL_LIGHT0);
        gl.glDepthFunc(GL.GL_LESS);
        gl.glEnable(GL.GL_DEPTH_TEST);
    }

    public void display(GLAutoDrawable drawable) {
        GL gl = drawable.getGL();
        //
        float position[] = { 0.0f, 0.0f, 1.0f, 1.0f };
        float mat_torus[] = { 0.75f, 0.75f, 0.0f, 1.0f };
        float mat_cylinder[] = { 0.0f, 0.75f, 0.75f, 0.15f };

        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
        gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, position, 0);
        gl.glPushMatrix();
        if (eyePosition)
            glu.gluLookAt(0.0, 0.0, 9.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
        else
            glu.gluLookAt(0.0, 0.0, -9.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
        gl.glPushMatrix();
        gl.glTranslatef(0.0f, 0.0f, 1.0f);
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, mat_torus, 0);
        glut.glutSolidTorus(0.275, 0.85, 10, 10);
        gl.glPopMatrix();

        gl.glEnable(GL.GL_BLEND);
        gl.glDepthMask(false);
        gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE);
        gl.glMaterialfv(GL.GL_FRONT, GL.GL_DIFFUSE, mat_cylinder, 0);
        gl.glTranslatef(0.0f, 0.0f, -1.0f);
        glut.glutSolidCube(2.0f);// (1.0, 2.0);
        gl.glDepthMask(true);
        gl.glDisable(GL.GL_BLEND);
        gl.glPopMatrix();

        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();
        glu.gluPerspective(30.0, (float) w / (float) h, 1.0, 20.0);
        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:
            System.exit(0);
            break;

        default:
            break;
        }
    }

    public void keyReleased(KeyEvent key) {
    }

    public void mouseClicked(MouseEvent mouse) {
    }

    public void mousePressed(MouseEvent mouse) {
        if (mouse.getButton() == MouseEvent.BUTTON1) //
            eyePosition = !eyePosition;

        ((GLCanvas)(this.getContentPane().getComponentAt(0,0))).display();
        
    }

    public void mouseReleased(MouseEvent mouse) {
    }

    public void mouseEntered(MouseEvent mouse) {
    }

    public void mouseExited(MouseEvent mouse) {
    }

}
/*
 *  For the software in this directory
 * (c) Copyright 1993, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED 
 * Permission to use, copy, modify, and distribute this software for 
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that 
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. 
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * US Government Users Restricted Rights 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
 */