JOGL 3D Paddle Wheel

So far, we have learned how to create different geometrical shapes in JOGL such as triangle, cube and cuboid. Now, we will create a paddle wheel and try to rotate it.

3D image of rotating paddle wheel

To rotate a paddle wheel through coding, go through the below example: -

JPaddle.java

package com.javatpoint.jogl;


import javax.media.opengl.*;
import javax.media.opengl.awt.GLCanvas;
import javax.swing.JFrame;
import com.jogamp.opengl.util.FPSAnimator;

public class JPaddle implements GLEventListener {

  

   private float rotation = 0.0f;
      
   @Override
   public void display( GLAutoDrawable drawable ) {
	
		   GL2 gl = drawable.getGL().getGL2();
		   gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
		   gl.glLoadIdentity();  
		   gl.glTranslatef( 0f, 0f, -2.0f ); 
		   gl.glRotatef(rotation, 1f, 0f, 0f);   

		   gl.glColor3f(1f, 0f, 0f);
		   gl.glBegin(GL2.GL_POLYGON); 
		   gl.glVertex3d(-0.5,0.3,0.8); 
		   gl.glVertex3d(0.5,0.3,0.8); 
		   gl.glVertex3d(0.8,0.7,0.8);
		   gl.glVertex3d(-0.8,0.7,0.8);
		   gl.glEnd();

		   int paddles=40;
		   for (int i = 0; i < paddles; i++) {
		   gl.glRotated(360.0/paddles, 1, 0, 0);
		   gl.glBegin(GL2.GL_POLYGON);
		   gl.glVertex3d(-0.5,0.3,0.8); 
		   gl.glVertex3d(0.5,0.3,0.8); 
		   gl.glVertex3d(0.8,0.7,0.8);
		   gl.glVertex3d(-0.8,0.7,0.8);

		   gl.glEnd();

		   }


		   rotation -= 0.2f;  

		   }
   
		   public void reshape(GLAutoDrawable drawable, int x, int y,
				   int width, int height) {

				   }
				   public void displayChanged(GLAutoDrawable drawable, boolean modeChanged,
				   boolean deviceChanged) {
				   }
				   @Override
				   public void dispose(GLAutoDrawable arg0) {
				   	
				   	
				   }
				   @Override
				   public void init(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);
      JPaddle paddle = new JPaddle();
		
      gc.addGLEventListener( paddle );
      gc.setSize( 400, 400 );
		
      final JFrame frame = new JFrame ("Motor Paddle");
      frame.add(gc);
      frame.setSize(600,500);
      frame.setVisible(true); 
      
      final FPSAnimator animator = new FPSAnimator(gc, 200,true);
      animator.start();
   }
	
}

Output: