/**
 * @(#) SimpleTest.java
 * @(#) author: unknown (converted to Java by Ron Cemer), converted again by Tim Hickey from molehill.java
 */

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.util.*;
import java.io.*;
import java.util.*;
import gl4java.GLContext;
import gl4java.awt.GLCanvas;

public class SimpleTest extends Applet 
{
    simpleTestCanvas canvas = null;


        /* Initialize the applet */


	public void init()
	{
        Dimension d = getSize();
        setLayout(new BorderLayout());
        canvas = new simpleTestCanvas(d.width, d.height);
        add("Center", canvas);
	}


        /* Start the applet */


    public void start()
    {
    }


        /* Stop the applet */


    public void stop()
    {
    }


        /* Destroy the applet */


    public void destroy()
    {
        canvas.cvsDispose();
    }


	public static void main( String args[] ) 
	{
		Frame mainFrame = new Frame("simpleTest");

		SimpleTest applet = new SimpleTest();

		applet.setSize(400, 400);
		applet.init();
		applet.start();

		mainFrame.add(applet);

		mainFrame.pack();
		mainFrame.setVisible(true);
	}

        /* Local GLCanvas extension class */


    private class simpleTestCanvas extends GLCanvas
    {
        float angle=0f;

        public simpleTestCanvas(int w, int h)
        {
            super(w, h);
            GLContext.gljNativeDebug = false;
            GLContext.gljClassDebug = false;
        }
    
        public void preInit()
        {
            doubleBuffer = true;
            stereoView = false;
        }
    
        public void init()
        {
            System.out.println("init(): " + this);
            reshape(getSize().width, getSize().height);

            gl.glMatrixMode(GL_PROJECTION);
            glu.gluPerspective(55.0f, 1.0f, 2.0f, 24.0f);
            gl.glMatrixMode(GL_MODELVIEW);
            gl.glTranslatef(0.0f, 0.0f, -15.0f);
            gl.glRotatef(200.0f, 1.0f, 0.0f, 0.0f);
            gl.glRotatef(60.0f, 0.0f, 1.0f, 0.0f);
            
        }
    
        public void cvsDispose()
        {
            System.out.println("destroy(): " + this);
            super.cvsDispose();
        }
    
        public void reshape(int width, int height)
        {
            gl.glViewport(0,0,width,height);
            gl.glMatrixMode(GL_PROJECTION);
        }

        public void display()
        {
            if (glj.gljMakeCurrent() == false)  // return;
                System.out.println("makecurrent error");

            gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

            gl.glMatrixMode(GL_MODELVIEW);
            gl.glLoadIdentity();
            glu.gluLookAt
               (0.0f, 8.0f, 6.0f, /* eye is at (0,8,6) */
                0.0f, 0.0f, 0.0f,  /* center is at (0,0,0) */
                0.0f, 1.0f, 0.0f); /* up is in postivie Y direction */

            gl.glRotatef(angle, 0.0f, 1.0f, 0.0f); angle+=0.5f;
            System.out.println("angle="+angle);

                gl.glBegin(GL_TRIANGLE_FAN);
                gl.glColor3f(1.0f, 0.0f, 0.0f);
                gl.glVertex3f(0, 0, 0);
                gl.glVertex3f(2, 1, 1);
                gl.glColor3f(1.0f, 1.0f, 0.0f);
                gl.glVertex3f(2, -1, 1);
                gl.glColor3f(0.0f, 1.0f, 0.0f);
                gl.glVertex3f(2, -1, -1);
                gl.glColor3f(0.0f, 1.0f, 1.0f);
                gl.glVertex3f(2, 1, -1);
                gl.glColor3f(0.0f, 0.0f, 1.0f);
                gl.glVertex3f(2, 1, 1);
                gl.glEnd();

            gl.glFlush();

            glj.gljSwap();
            glj.gljCheckGL();
            glj.gljFree();
        }
    }
}