package eas.miscellaneous.java3D;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Material;
import javax.media.j3d.PointLight;
import javax.media.j3d.SpotLight;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.swing.JFrame;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.SimpleUniverse;
/**
* An example for the use of different light sources. Three light spots
* can be seen on the shiny sphere coming from the directional, the point and
* the spotlight.
*
* This program can be used to play with different colour and illumination effects.
* For instance, the Appearances for the cube and the sphere can be modified to
* see the influence of the choice of different (colour) parameters. It is also
* possible to change the parameters (especially the colours) of the light sources.
* In order to see the effects of single light sources, other light sources
* can be deactivated by not adding them to the corresponding BranchGroup bgLight.
* Change: bgLight.addChild(lightNoX); to //bgLight.addChild(lighNoX);
*
* @author Frank Klawonn
* Last change 01.07.2005
*/
@SuppressWarnings("all")
public class LightingExample extends JFrame
{
//The canvas to be drawn upon.
public Canvas3D myCanvas3D;
public LightingExample()
{
//Mechanism for closing the window and ending the program.
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Default settings for the viewer parameters.
myCanvas3D = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
//Construct the SimpleUniverse:
//First generate it using the Canvas.
SimpleUniverse simpUniv = new SimpleUniverse(myCanvas3D);
//Default position of the viewer.
simpUniv.getViewingPlatform().setNominalViewingTransform();
//The scene is generated in this method.
createSceneGraph(simpUniv);
//Add some light to the scene.
addLight(simpUniv);
//The following three lines enable navigation through the scene using the mouse.
OrbitBehavior ob = new OrbitBehavior(myCanvas3D);
ob.setSchedulingBounds(new BoundingSphere(new Point3d(0.0,0.0,0.0),Double.MAX_VALUE));
simpUniv.getViewingPlatform().setViewPlatformBehavior(ob);
//Show the canvas/window.
setTitle("Various illumination effects");
setSize(700,700);
getContentPane().add("Center", myCanvas3D);
setVisible(true);
}
public static void main(String[] args)
{
LightingExample le = new LightingExample();
}
//In this method, the objects for the scene are generated and added to
//the SimpleUniverse.
public void createSceneGraph(SimpleUniverse su)
{
//*** Generate a cube. ***
//Generate an Appearance for the cube.
Color3f ambientColourBox = new Color3f(0.8f,0.0f,0.0f);
Color3f emissiveColourBox = new Color3f(0.0f,0.0f,0.0f);
Color3f diffuseColourBox = new Color3f(0.8f,0.0f,0.0f);
Color3f specularColourBox = new Color3f(1.0f,0.0f,0.0f);
float shininessBox = 10.0f;
Appearance boxApp = new Appearance();
boxApp.setMaterial(new Material(ambientColourBox,emissiveColourBox,
diffuseColourBox,specularColourBox,shininessBox));
Box myBox = new Box(0.2f,0.2f,0.2f,boxApp);
//Rotate and shift the cube slightly.
Transform3D tfBox = new Transform3D();
tfBox.rotY(Math.PI/6);
tfBox.rotX(Math.PI/9);
Transform3D shift = new Transform3D();
shift.setTranslation(new Vector3f(-0.6f,-0.2f,0.1f));
tfBox.mul(shift);
TransformGroup tgBox = new TransformGroup(tfBox);
tgBox.addChild(myBox);
//***Generate a sphere ***
//Generate an Appearance for the sphere.
Color3f ambientColourSphere = new Color3f(0.2f,0.2f,0.0f);
Color3f emissiveColourSphere = new Color3f(0.0f,0.0f,0.0f);
Color3f diffuseColourSphere = new Color3f(0.4f,0.4f,0.0f);
Color3f specularColourSphere = new Color3f(0.8f,0.8f,0.0f);
float shininessSphere = 120.0f;
Appearance sphereApp = new Appearance();
sphereApp.setMaterial(new Material(ambientColourSphere,emissiveColourSphere,
diffuseColourSphere,specularColourSphere,shininessSphere));
Sphere mySphere = new Sphere(0.3f,Sphere.GENERATE_NORMALS,100,sphereApp);
Transform3D tfSphere = new Transform3D();
tfSphere.setTranslation(new Vector3f(0.0f,0.0f,-1.0f));
TransformGroup tgSphere = new TransformGroup(tfSphere);
tgSphere.addChild(mySphere);
//*** Generate (the root of) the scenegraph. ***
BranchGroup theScene = new BranchGroup();
//Add the cube and the sphere to the scene.
theScene.addChild(tgBox);
theScene.addChild(tgSphere);
//Generate a white background.
Background bg = new Background(new Color3f(1.0f,1.0f,1.0f));
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),Double.MAX_VALUE);
bg.setApplicationBounds(bounds);
theScene.addChild(bg);
theScene.compile();
//Add everything to the universe.
su.addBranchGraph(theScene);
}
//The different light sources are added to the scene here.
public void addLight(SimpleUniverse su)
{
BranchGroup bgLight = new BranchGroup();
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), Double.MAX_VALUE);
//Light no. 1: directional light.
Color3f lightColour1 = new Color3f(0.8f, 0.8f, 0.8f);
Vector3f lightDir1 = new Vector3f(0.0f, 4.0f, -1.0f);
DirectionalLight light1 = new DirectionalLight(lightColour1, lightDir1);
light1.setInfluencingBounds(bounds);
bgLight.addChild(light1);
//Light no. 2: a point light.
Color3f lightColour2 = new Color3f(0.3f, 0.3f, 0.3f);
PointLight light2 = new PointLight(lightColour2,
new Point3f(1.0f,1.0f,1.0f),
new Point3f(0.2f,0.01f,0.01f));
light2.setInfluencingBounds(bounds);
bgLight.addChild(light2);
//Light no. 3: a spotlight.
Color3f lightColour3 = new Color3f(0.3f, 0.3f, 0.3f);
SpotLight light3 = new SpotLight(lightColour3,
new Point3f(0.0f,0.0f,1.0f),
new Point3f(0.1f,0.1f,0.01f),
new Vector3f(0.0f,0.0f,-1.0f),
(float) (Math.PI/20),
0.0f);
light3.setInfluencingBounds(bounds);
bgLight.addChild(light3);
//Light no. 4: ambient light.
Color3f lightColour4 = new Color3f(0.2f, 0.2f, 0.2f);
AmbientLight light4 = new AmbientLight(lightColour4);
light4.setInfluencingBounds(bounds);
bgLight.addChild(light4);
su.addBranchGraph(bgLight);
}
}