JOGL Hello World

by Online Tutorials Library July 14, 2022

JOGL Hello World

We already learned how to draw a simple lines in JOGL. By changing the coordinates of such line, we can also write alphabetical words.

JOGL Hello World Example

In this example, we will draw first character of Hello World (i.e. H W).

HelloWorld.java

 package com.tutoraspire.jogl;  import javax.media.opengl.*;   import javax.media.opengl.awt.GLCanvas;   import javax.swing.JFrame;      public class HelloWorld implements GLEventListener {          @Override   public void init(GLAutoDrawable arg0)      {                }         @Override   public void display(GLAutoDrawable drawable) {   final GL2 gl = drawable.getGL().getGL2();     //Draw H gl.glBegin(GL2.GL_LINES);  gl.glVertex2d(-0.8, 0.6); gl.glVertex2d(-0.8, -0.6); gl.glVertex2d(-0.8, 0.0); gl.glVertex2d(-0.4, 0.0); gl.glVertex2d(-0.4, 0.6); gl.glVertex2d(-0.4, -0.6); gl.glEnd(); //Draw W gl.glBegin(GL2.GL_LINES); gl.glVertex2d(0.4,0.6); gl.glVertex2d(0.4,-0.6); gl.glVertex2d(0.4,-0.6); gl.glVertex2d(0.6,0); gl.glVertex2d(0.6,0); gl.glVertex2d(0.8,-0.6); gl.glVertex2d(0.8,-0.6); gl.glVertex2d(0.8,0.6); gl.glEnd();    }            @Override   public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int arg3, int arg4)       {             }      @Override   public void dispose(GLAutoDrawable arg0)       {         }      public static void main(String[] args) {      final GLProfile gp = GLProfile.get(GLProfile.GL2);   GLCapabilities cap = new GLCapabilities(gp);      final GLCanvas gc = new GLCanvas(cap);   HelloWorld sq = new HelloWorld();   gc.addGLEventListener(sq);   gc.setSize(400, 400);      final JFrame frame = new JFrame(“Hello World”);   frame.add(gc);   frame.setSize(500,400);   frame.setVisible(true);        }       }   

Output:

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