1. A Simple Talk on Java 3D Presented by C.H. Chen on Jul. 6, 2004

2. Outlines Introduction Deployment of your Development Environment Understanding Java 3D Demo

3. Introduction

5. Flight simulators and medical-imaging Developments in high-performance hardware led to developments in high-performance graphics APIs — beginning in the 1970s with Siggraph ’ s CORE API, continuing in the 1980s with SGI ’ s OpenGL and on through today with MS ’ s Direct3D and Java 3D. 3D Graphic Java 3D: high-level graphic-programming API write once run anywhere simplifying the complex graphics

6. Introduction Four major goals of Java 3D APIs -application portability -hardware independence -performance scalibility -ability to produce 3D graphics over a network

7. Introduction

8. Features of Java 3D for development - Behavior - Fog - Geometry - Light - Sound - Texture

9. Deployment of your Development Environment Requirement: J2SE or J2EE, OpenGL or Direct X Java 3D API 1.3.1 (current version) http://java.sun.com/product/java-media/3D other IDE : eg. Java 3D NetBeans Module 1.0 beta

10. Deployment of your Development Environment

11. Understanding Java 3D

13. Scene : Virtual Universe VirtualUniverse Scene Graph

14. Understanding Java 3D

24. Partial subclasses of - Group : BranchGroup, Switch TransformGroup … - Leaf : Behavior, Light, Shape3D ViewPlatform … - NodeComponent : Appearance, Material Texture …

25. Understanding Java 3D

28. SimpleUniverse class creates a scene graph including: VirtualUniverse, locale objects, complete view branch graph View branch graph ViewingPlatform, viewer

29. Understanding Java 3D

32. Sample code tracing // Java extension packages import javax.swing.event.*; import javax.media.j3d.*; import javax.vecmath.*; // Java3D utility packages import com.sun.j3d.utils.universe.*; import com.sun.j3d.utils.image.*; import com.sun.j3d.utils.geometry.*; import com.sun.j3d.utils.behaviors.mouse.*;

33. public class Java3DWorld extends Canvas3D { private Appearance appearance; // 3D object's appearance private Light ambientLight; // ambient scene lighting private Box shape; // 3D object to manipulate private Color3f lightColor; // Light color private Light directionalLight; private Material material; // 3D objects color object private SimpleUniverse simpleUniverse; // 3D scene environment private TextureLoader textureLoader; // 3D object's texture // holds 3D transformation information private TransformGroup transformGroup; private String imageName; // texture image file name // Java3DWorld constructor public Java3DWorld( String imageFileName ) { super( SimpleUniverse.getPreferredConfiguration() ); imageName = imageFileName;

34. Sample code tracing // create SimpleUniverse ( 3D Graphics environment ) simpleUniverse = new SimpleUniverse( this ); // set viewing distance for 3D scene ViewingPlatform viewPlatform = simpleUniverse.getViewingPlatform(); viewPlatform.setNominalViewingTransform(); // create 3D scene BranchGroup branchGroup = createScene(); // attach BranchGroup to SimpleUniverse simpleUniverse.addBranchGraph( branchGroup ); } // end Java3DWorld constructor 5

35. // create 3D scene public BranchGroup createScene() { BranchGroup scene = new BranchGroup(); // initialize TransformGroup transformGroup = new TransformGroup(); // set TransformGroup's WRITE permission transformGroup.setCapability( TransformGroup.ALLOW_TRANSFORM_WRITE ); transformGroup.setCapability( TransformGroup.ALLOW_TRANSFORM_READ ); // add TransformGroup to BranchGroup scene.addChild( transformGroup ); // create BoundingSphere BoundingSphere bounds = new BoundingSphere( new Point3d( 0.0f, 0.0f, 0.0f ), 100.0 ); 1

36. appearance = new Appearance(); // create object appearance material = new Material(); // create texture matieral appearance.setMaterial( material ); String rgb = new String( "RGB" ); // load texture for scene object textureLoader = new TextureLoader( Java3DWorld.class.getResource( imageName ), rgb, this ); // set capability bits for enabling texture textureLoader.getTexture().setCapability( Texture.ALLOW_ENABLE_WRITE ); // initial texture will not show textureLoader.getTexture().setEnable( false ); // set object's texture appearance.setTexture( textureLoader.getTexture() ); Box.GENERATE_NORMALS | Box.GENERATE_TEXTURE_COORDS, appearance );

37. // add geometry to TransformGroup transformGroup.addChild( shape ); // initialize Ambient lighting ambientLight = new AmbientLight(); ambientLight.setInfluencingBounds( bounds ); // initialize directionalLight directionalLight = new DirectionalLight(); lightColor = new Color3f(); // initialize light color // set initial DirectionalLight color directionalLight.setColor( lightColor ); // set capability bits to allow DirectionalLight's // Color and Direction to be changed directionalLight.setCapability( DirectionalLight.ALLOW_DIRECTION_WRITE ); directionalLight.setCapability( DirectionalLight.ALLOW_DIRECTION_READ ); 2

38. directionalLight.setCapability( DirectionalLight.ALLOW_COLOR_WRITE ); directionalLight.setCapability( DirectionalLight.ALLOW_COLOR_READ ); directionalLight.setInfluencingBounds( bounds ); // add light nodes to BranchGroup scene.addChild( ambientLight ); scene.addChild( directionalLight ); // initialize rotation behavior MouseRotate rotateBehavior = new MouseRotate(); rotateBehavior.setTransformGroup( transformGroup ); rotateBehavior.setSchedulingBounds( bounds ); // initialize translation behavior MouseTranslate translateBehavior = new MouseTranslate(); translateBehavior.setTransformGroup( transformGroup ); translateBehavior.setSchedulingBounds( new BoundingBox( new Point3d( -1.0f, -1.0f, -1.0f ), new Point3d( 1.0f, 1.0f, 1.0f ) ) ); 3

39. // initialize scaling behavior MouseZoom scaleBehavior = new MouseZoom(); scaleBehavior.setTransformGroup( transformGroup ); scaleBehavior.setSchedulingBounds( bounds ); // add behaviors to BranchGroup scene.addChild( scaleBehavior ); scene.addChild( rotateBehavior ); scene.addChild( translateBehavior ); scene.compile(); return scene; } // end method createScene 4

40. Scene Graph of sample code BG TG S B L Appearance Geometry 5 1 2 3 4

41. Demo Java 3D demo Java 3D Fly Through v 1.0

42. References Sun Microsystem Java 3D http://java.sun.com/products/java-media/3D/ Java 3D Tutorial Java 3D Scene Graph Editor http://java3d.netbeans.org/ http://java.sun.com/products/java- media/3D/collateral/presentation/index.htmlhttp://java.sun.com/products/java- media/3D/collateral/presentation/index.html Sample code: Advanced Java how to program