import javax.media.opengl.GL2; 
import javax.media.opengl.GLAutoDrawable; 
import javax.media.opengl.GLCapabilities; 
import javax.media.opengl.GLEventListener; 
import javax.media.opengl.GLProfile; 
import javax.media.opengl.awt.GLCanvas; 

import javax.swing.JFrame;
 
public class Scaling implements GLEventListener {
 
   @Override 
    
   public void display( GLAutoDrawable drawable ) { 
   
      final GL2 gl = drawable.getGL().getGL2(); 
      gl.glScalef( 0.50f,0.25f,0.50f ); 
      gl.glBegin( GL2.GL_TRIANGLES );
        
      // Drawing Using Triangles 
      gl.glColor3f( 1.0f, 0.0f, 0.0f );   // Red 
      gl.glVertex3f( 0.5f,0.7f,0.0f );    // Top 
        
      gl.glColor3f( 0.0f,1.0f,0.0f );     // blue 
      gl.glVertex3f( -0.2f,-0.50f,0.0f ); // Bottom Left 
        
      gl.glColor3f( 0.0f,0.0f,1.0f );     // green 
      gl.glVertex3f( 0.5f,-0.5f,0.0f );   // Bottom Right 
        
      gl.glEnd(); 
   }
   
   @Override 
   public void dispose( GLAutoDrawable arg0 ) { 
      //method body 
   } 
   
   @Override 
   public void init( GLAutoDrawable arg0 ) { 
      // method body 
   } 
   
   @Override 
   public void reshape( GLAutoDrawable arg0, int arg1, int arg2, int arg3, int arg4 ) { 
      // method body 
   }
   
   public static void main( String[] args ) {   
   
      //getting the capabilities object of GL2 profile 
      final GLProfile profile = GLProfile.get( GLProfile.GL2 ); 
      GLCapabilities capabilities = new GLCapabilities(profile);
        
      // The canvas  
      final GLCanvas glcanvas = new GLCanvas( capabilities ); 
      Scaling scaling = new Scaling(); 
      glcanvas.addGLEventListener( scaling ); 
      glcanvas.setSize( 400, 400 );  

      //creating frame 
      final JFrame frame  = new JFrame (" Dimnished Triangle (Scaling )");   

      //adding canvas to it 
      frame.getContentPane().add(glcanvas); 
      frame.setSize(frame.getContentPane().getPreferredSize()); 
      frame.setVisible(true);         
      
   } //end of main 
    
} //end of classimport javax.media.opengl.GL2;