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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.
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import com.jogamp.opengl.*; | |
import com.jogamp.opengl.fixedfunc.*; | |
import com.jogamp.opengl.util.Animator; | |
import com.jogamp.opengl.util.ImmModeSink; | |
import com.jogamp.newt.opengl.GLWindow; | |
/** | |
* Self-contained example (within a single class only to keep it simple) | |
* displaying a rotating quad | |
*/ | |
public class JOGLQuadES1 implements GLEventListener { | |
private float rotateT = 0.0f; | |
private static Animator animator; | |
private static final ImmModeSink glSink = ImmModeSink.createFixed( 40, | |
3, GL.GL_FLOAT, // vertex | |
4, GL.GL_FLOAT, // color | |
0, GL.GL_FLOAT, // normal | |
0, GL.GL_FLOAT, // texCoords | |
GL.GL_STATIC_DRAW); | |
@Override | |
public void display(GLAutoDrawable gLDrawable) { | |
final GL2ES1 gl = gLDrawable.getGL().getGL2ES1(); | |
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 | |
// ES1 do not support glBegin(GL2.GL_QUADS) | |
// JogAmp JOGL can use its ImmModeSink class to emulate GL2 QUADS on ES1 hardware. | |
glSink.glBegin(glSink.GL_QUADS); | |
glSink.glColor3f(0.0f, 1.0f, 0.5f); // set the color of the quad | |
glSink.glVertex3f(-1.0f, 1.0f, 0.0f); // Top Left | |
glSink.glColor3f(1.0f, 0.0f, 0.5f); | |
glSink.glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right | |
glSink.glColor3f(1.0f, 0.5f, 0.0f); | |
glSink.glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right | |
glSink.glColor3f(0.0f, 0.5f, 1.0f); | |
glSink.glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left | |
// Done Drawing The Quad | |
glSink.glEnd(gl); | |
// increasing rotation for the next iteration | |
rotateT += 0.2f; | |
} | |
@Override | |
public void init(GLAutoDrawable glDrawable) { | |
GL2ES1 gl = glDrawable.getGL().getGL2ES1(); | |
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) { | |
GL2ES1 gl = gLDrawable.getGL().getGL2ES1(); | |
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) { | |
animator.stop(); | |
glSink.destroy(glDrawable.getGL()); | |
} | |
public static void main(String[] args) { | |
GLCapabilities caps = new GLCapabilities(GLProfile.get(GLProfile.GL2ES1)); | |
// We may at this point tweak the caps and request a translucent drawable | |
caps.setBackgroundOpaque(false); | |
GLWindow glWindow = GLWindow.create(caps); | |
animator = new Animator(glWindow); | |
glWindow.addGLEventListener(new JOGLQuadES1()); | |
glWindow.setTitle("Jogl ES1 Quad drawing"); | |
glWindow.setSize(600, 400); | |
glWindow.setVisible(true); | |
animator.start(); | |
} | |
} |
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