Code Example
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.
JOGLQuad class—This class uses the JOGL API (version 2.0) to render a polygon.
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GL2ES1;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.awt.GLCanvas;
import javax.media.opengl.fixedfunc.GLLightingFunc;
import javax.media.opengl.fixedfunc.GLMatrixFunc;
import javax.media.opengl.glu.GLU;
import com.jogamp.opengl.util.Animator;
/** * Self-contained example (within a single class only to keep it simple) * displaying a rotating quad * * @author Julien Gouesse (http://tuer.sourceforge.net) * * Source code under CC BY 3.0 */
public class JoglExample { private static final class JoglExampleKeyListener extends KeyAdapter { private final JoglExample joglExample; private JoglExampleKeyListener(JoglExample joglExample) { this.joglExample = joglExample; } @Override public void keyPressed(KeyEvent e) { if (e.getKeyCode == KeyEvent.VK_ESCAPE) { joglExample.exit; } } } private static final class JoglExampleGLEventListener implements GLEventListener { private final JoglExample joglExample; private float rotateT = 0.0f; private GLU glu; private JoglExampleGLEventListener(JoglExample joglExample) { this.joglExample = joglExample; } @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 on the three axis 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; glu = GLU.createGLU(gl); 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); ((Component) glDrawable).addKeyListener(new JoglExampleKeyListener(joglExample)); } @Override public void reshape(GLAutoDrawable gLDrawable, int x, int y, int width, int height) { GL2 gl = gLDrawable.getGL.getGL2; if (height <= 0) { height = 1; } float h = (float) width / (float) height; gl.glMatrixMode(GLMatrixFunc.GL_PROJECTION); gl.glLoadIdentity; glu.gluPerspective(50.0f, h, 1.0, 1000.0); gl.glMatrixMode(GLMatrixFunc.GL_MODELVIEW); gl.glLoadIdentity; } @Override public void dispose(GLAutoDrawable gLDrawable) { // do nothing } } private final GLCanvas canvas; private final Frame frame; private final Animator animator; public JoglExample { canvas = new GLCanvas; frame = new Frame("Jogl Quad drawing"); animator = new Animator(canvas); canvas.addGLEventListener(new JoglExampleGLEventListener(this)); frame.add(canvas); frame.setSize(640, 480); frame.setUndecorated(true); frame.setExtendedState(Frame.MAXIMIZED_BOTH); frame.addWindowListener(new WindowAdapter { public void windowClosing(WindowEvent e) { exit; } }); frame.setVisible(true); animator.start; canvas.requestFocus; } public void exit { animator.stop; frame.dispose; System.exit(0); } public static void main(String args) { // AWT methods have to be invoked on the AWT EDT EventQueue.invokeLater(new Runnable { @Override public void run { new JoglExample; } }); }
}