Illustrates how to display a ball lit by a red light : Sphere Ball « 3D « Java

Illustrates how to display a ball lit by a red light

Illustrates how to display a ball lit by a red light
The Joy of Java 3D

by Greg Hopkins

Copyright Copyright 2001

Lighting up the World. The way the light falls on an object provides us with the 
shading that helps us see shapes in three dimensions

The next example illustrates how to display a ball lit by a red light:

The sphere we created is white (the default), it appears red because of the colored 
light. Since it is a DirectionalLight, we also have to specify how far the light 
shines and in what direction. In the example, the light shines for 100 meters from 
the origin and the direction is to the right, down and into the screen (this is defined 
by the vector: 4.0 right, -7.0 down, and -12.0 into the screen).

You can also create an AmbientLight which will produce a directionless light, or a 
SpotLight if you want to focus on a particular part of your scene. A combination of a 
strong directional light and a weaker ambient light gives a natural-looking appearance to 
your scene. Java 3D lights do not produce shadows.


import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.SimpleUniverse;

public class Ball {
  public Ball() {
    // Create the universe
    SimpleUniverse universe = new SimpleUniverse();

    // Create a structure to contain objects
    BranchGroup group = new BranchGroup();

    // Create a ball and add it to the group of objects
    Sphere sphere = new Sphere(0.5f);

    // Create a red light that shines for 100m from the origin
    Color3f light1Color = new Color3f(1.8f, 0.1f, 0.1f);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
    Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
    DirectionalLight light1 = new DirectionalLight(light1Color,

    // look towards the ball

    // add the group of objects to the Universe

  public static void main(String[] args) {
    new Ball();


Related examples in the same category

1.The scene is of nine spheres and one light sourceThe scene is of nine spheres and one light source
2.Sphere SampleSphere Sample
3.A red sphere using the Sphere utility classA red sphere using the Sphere utility class
4.Appearance Bounds