/*
 *  model.java
 *  This program demonstrates modeling transformations
 */

import java.awt.Frame;
import java.io.IOException;
import java.lang.String;
import java.lang.System;

import jgl.GL;
import jgl.GLCanvas;

public class model extends GLCanvas {

    private void myinit () {
    	myGL.glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
	myGL.glShadeModel (GL.GL_FLAT);
    }

    private void draw_triangle () {
	myGL.glBegin (GL.GL_LINE_LOOP);
	    myGL.glVertex2f (  0.0f,  25.0f);
	    myGL.glVertex2f ( 25.0f, -25.0f);
	    myGL.glVertex2f (-25.0f, -25.0f);
	myGL.glEnd ();
    }

    public void display () {
	myGL.glClear (GL.GL_COLOR_BUFFER_BIT);
	myGL.glColor3f (1.0f, 1.0f, 1.0f);

	myGL.glLoadIdentity ();
	myGL.glColor3f (1.0f, 1.0f, 1.0f);
	draw_triangle ();

	myGL.glEnable (GL.GL_LINE_STIPPLE);
	myGL.glLineStipple (1, (short)0xF0F0);
	myGL.glLoadIdentity ();
	myGL.glTranslatef (-20.0f, 0.0f, 0.0f);
	draw_triangle ();

	myGL.glLineStipple (1, (short)0xF00F);
	myGL.glLoadIdentity ();
	myGL.glScalef (1.5f, 0.5f, 1.0f);
	draw_triangle ();

	myGL.glLineStipple (1, (short)0x8888);
	myGL.glLoadIdentity ();
	myGL.glRotatef (90.0f, 0.0f, 0.0f, 1.0f);
	draw_triangle ();
	myGL.glDisable (GL.GL_LINE_STIPPLE);
	
	myGL.glFlush ();
    }

    public void myReshape (int w, int h) {
        myGL.glViewport (0, 0, w, h);
        myGL.glMatrixMode (GL.GL_PROJECTION);
        myGL.glLoadIdentity ();
        if (w <= h) {
            myGL.glOrtho (-50.0f, 50.0f,
                          -50.0f*(float)h/(float)w, 
                           50.0f*(float)h/(float)w, 
                           -1.0f, 1.0f);
        } else {
            myGL.glOrtho (-50.0f*(float)w/(float)h, 
                           50.0f*(float)w/(float)h, 
                          -50.0f, 50.0f,
                           -1.0f,  1.0f);
        }
        myGL.glMatrixMode (GL.GL_MODELVIEW);
    }

    /* ARGSUSED1 */
    public void keyboard (char key, int x, int y) {
	switch (key) {
	    case 27:
		System.exit(0);
	    default:
		break;
	}
    }

    public void init () {
	myUT.glutInitWindowSize (500, 500);
	myUT.glutInitWindowPosition (0, 0);
	myUT.glutCreateWindow (this);
	myinit ();
	myUT.glutDisplayFunc ("display");
	myUT.glutReshapeFunc ("myReshape");
	myUT.glutKeyboardFunc ("keyboard");
	myUT.glutMainLoop ();
    }

    static public void main (String args[]) throws IOException {
	Frame mainFrame = new Frame ();
	mainFrame.setSize (508, 527);
	model mainCanvas = new model ();
	mainCanvas.init();
	mainFrame.add (mainCanvas);
	mainFrame.setVisible (true);
    }

}