JOGL 3D Triangle

JOGL 3D Triangle with Introduction, Installation, Interfaces, Classes, Frame using AWT, Frame using Swing, 2D Objects, Primitives Shapes, 3D Cube, 3D Triangle, 3D Basic Shape, 3D Objects etc.

Jan 10, 2020 06:21 109 0

JOGL 3D Triangle

In this section, we will learn how to create a three-dimensional triangle with the help of simple example. We will also rotate this triangle to see all its sides.

J3DTriangle.java

package com.tpoint.jogl;  
  
import javax.media.opengl.*;  
import javax.media.opengl.awt.GLCanvas;  
import javax.media.opengl.glu.GLU;  
  
import javax.swing.JFrame;  
  
import com.jogamp.opengl.util.FPSAnimator;  
  
public class J3DTriangle implements GLEventListener {  
  
private GLU glu = new GLU();  
private float rotation = 0.0f;  
  
   @Override  
public void display(GLAutoDrawable drawable) {  
final GL2 gl = drawable.getGL().getGL2();  
  
  
gl.glClear( GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT );  
gl.glLoadIdentity();   
      // Move triangle  
gl.glTranslatef( -0.5f, 0.0f, -6.0f );   
gl.glRotatef( rotation, 0.0f, 1.0f, 0.0f );  
gl.glBegin( GL2.GL_TRIANGLES );   
  
  
      // Front  
gl.glColor3f( 1.0f, 1.0f, 0.0f ); // Yellow  
gl.glVertex3f( 1.5f, 2f, 0.0f ); // Top Of Triangle   
          
gl.glColor3f( 0.0f, 1.5f, 0.0f ); // Green  
gl.glVertex3f( -1.5f, -1.5f, 1.5f ); // Left Of Triangle   
          
gl.glColor3f( 1.0f, 0.0f, 1.0f ); // Purple  
gl.glVertex3f( 1.5f, -1.5f, 1.5f ); // Right Of Triangle   
  
      // Right  
gl.glColor3f( 1.0f, 1.0f, 0.0f ); // Yellow  
gl.glVertex3f( 1.5f, 2.0f, 0.0f ); // Top Of Triangle   
          
gl.glColor3f( 1.0f, 0.0f, 1.0f ); // Purple  
gl.glVertex3f( 1.5f, -1.5f, 1.5f ); // Left Of Triangle   
          
gl.glColor3f( 0.0f, 1.0f, 0.0f ); // Green  
gl.glVertex3f( 1.5f, -1.5f, -1.5f ); // Right Of Triangle   
  
      // Back  
gl.glColor3f( 1.0f, 1.0f, 0.0f ); // Yellow  
gl.glVertex3f( 1.5f, 2.0f, 0.0f ); // Top Of Triangle   
          
gl.glColor3f( 0.0f, 1.0f, 0.0f ); // Green  
gl.glVertex3f( 1.5f, -1.5f, -1.5f ); // Left Of Triangle   
          
gl.glColor3f( 1.0f, 0.0f, 1.0f ); // Purple  
gl.glVertex3f( -1.5f, -1.5f, -1.5f ); // Right Of Triangle   
  
      //left  
gl.glColor3f( 1.0f, 1.0f, 0.0f ); // Yellow  
gl.glVertex3f( 1.5f, 2.0f, 0.0f ); // Top Of Triangle   
          
gl.glColor3f( 1.0f, 0.0f, 1.0f ); // Purple  
gl.glVertex3f( -1.5f, -1.5f, -1.5f ); // Left Of Triangle   
          
gl.glColor3f( 0.0f, 1.0f, 0.0f ); // Green  
gl.glVertex3f( -1.5f, -1.5f, 1.5f ); // Right Of Triangle   
          
gl.glEnd();   
gl.glFlush();  
rotation += 0.6f;  
   }  
  
   @Override  
public void dispose( GLAutoDrawable drawable ) {  
      //method body  
   }  
  
   @Override  
public void init( GLAutoDrawable drawable ) {  
      //method body  
   }  
  
   @Override  
public void reshape( GLAutoDrawable drawable, int x, int y, int width, int height ) {  
  
final GL2 gl = drawable.getGL().getGL2();  
if(height<=0)  
height = 1;  
              
final float h = ( float ) width / ( float ) height;  
gl.glViewport( 0, 0, width, height );  
gl.glMatrixMode( GL2.GL_PROJECTION );  
gl.glLoadIdentity();  
          
glu.gluPerspective( 45.0f, h, 1.0, 20.0 );  
gl.glMatrixMode( GL2.GL_MODELVIEW );  
gl.glLoadIdentity();  
   }  
  
public static void main( String[] args ) {  
  
final GLProfile gp = GLProfile.get( GLProfile.GL2 );  
GLCapabilities cap = new GLCapabilities(gp );  
  
final GLCanvas gc = new GLCanvas( cap );  
      J3DTriangle triangle = new J3DTriangle();  
          
gc.addGLEventListener( triangle );  
gc.setSize( 400, 400 );  
          
final JFrame frame = new JFrame( "3D Triangle" );  
          
frame.add(gc);  
frame.setSize(500,400);  
frame.setVisible(true);    
  
          
final FPSAnimator animator = new FPSAnimator(gc,400,true);  
animator.start();  
   }  
      
}  