SW Tracking Report Feature Objectives Overview

This program displays a simple 3D rendering of a polygon using JOGL. Please note though that this code is a demonstration of the use of JOGL and as such makes use of immediate mode drawing commands; this serves to show how the conventional C style API is used through JOGL, but it is strongly recommended to make use of modern OpenGL techniques.

import java.awt.*;
import java.awt.event.*;
import com.jogamp.opengl.*;
import com.jogamp.opengl.awt.GLCanvas;
import com.jogamp.opengl.fixedfunc.*;
import com.jogamp.opengl.util.Animator;
 
/**
 * Self-contained example (within a single class only to keep it simple) 
 * displaying a rotating quad
 */
public class JOGLQuad implements GLEventListener {
 
	private float rotateT = 0.0f;
 
	@Override
	public void display(GLAutoDrawable gLDrawable) {
		final GL2 gl = gLDrawable.getGL().getGL2();
		gl.glClear(GL.GL_COLOR_BUFFER_BIT);
		gl.glClear(GL.GL_DEPTH_BUFFER_BIT);
		gl.glLoadIdentity();
		gl.glTranslatef(0.0f, 0.0f, -5.0f);
 
		// rotate about the three axes
		gl.glRotatef(rotateT, 1.0f, 0.0f, 0.0f);
		gl.glRotatef(rotateT, 0.0f, 1.0f, 0.0f);
		gl.glRotatef(rotateT, 0.0f, 0.0f, 1.0f);
 
		// Draw A Quad
		gl.glBegin(GL2.GL_QUADS);       
		gl.glColor3f(0.0f, 1.0f, 1.0f);   // set the color of the quad
		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();                                                     
 
		// increasing rotation for the next iteration                   
		rotateT += 0.2f; 
	}
 
	@Override
	public void init(GLAutoDrawable glDrawable) {
		GL2 gl = glDrawable.getGL().getGL2();
		gl.glShadeModel(GLLightingFunc.GL_SMOOTH);
		gl.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
		gl.glClearDepth(1.0f);
		gl.glEnable(GL.GL_DEPTH_TEST);
		gl.glDepthFunc(GL.GL_LEQUAL);
		gl.glHint(GL2ES1.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
	}
 
	@Override
	public void reshape(GLAutoDrawable gLDrawable, int x, int y, int width, int height) {
		GL2 gl = gLDrawable.getGL().getGL2();
		final float aspect = (float) width / (float) height;
		gl.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
		gl.glLoadIdentity();
		final float fh = 0.5f;
		final float fw = fh * aspect;
		gl.glFrustumf(-fw, fw, -fh, fh, 1.0f, 1000.0f);
		gl.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
		gl.glLoadIdentity();
	}
 
	@Override
	public void dispose(GLAutoDrawable gLDrawable) {
	}
 
	public static void main(String[] args) {
		final GLCanvas canvas = new GLCanvas();
		final Frame frame = new Frame("Jogl Quad drawing");
		final Animator animator = new Animator(canvas);
		canvas.addGLEventListener(new JOGLQuad());
		frame.add(canvas);
		frame.setSize(640, 480);
		frame.setResizable(false);
		frame.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				animator.stop();
				frame.dispose();
				System.exit(0);
			}
		});
		frame.setVisible(true);
		animator.start();
		canvas.requestFocus();
	}
}

You can compile the source code above with Java >= 9 by entering (the JogAmp fat JAR jogamp-fat.jar is required):

javac -cp jogamp-fat.jar JOGLQuad.java

You can run this example by entering (under other operating systems except Windows):

java --add-exports java.base/java.lang=ALL-UNNAMED --add-exports java.desktop/sun.java2d=ALL-UNNAMED --add-opens java.desktop/sun.awt=ALL-UNNAMED -cp jogamp-fat.jar:. JOGLQuad

You can run this example by entering (under Windows):

java --add-exports java.base/java.lang=ALL-UNNAMED --add-exports java.desktop/sun.java2d=ALL-UNNAMED --add-opens java.desktop/sun.awt=ALL-UNNAMED -cp jogamp-fat.jar;. JOGLQuad