Java 3D Introduction

http://www.hta-bi.bfh.ch/~rfs/pwf/java3/

Stefan RuferAssistant Computer Science Departement

rfs@hta-bi.bfh.ch

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Todays Contents Start Introduction to Computer Graphics Java 3D Tutorial Chapters – Layout:

Technical Introduction Application in Java 3D Example Programs

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Start Foreword Installing Java 3D Running Java 3D Programs Warm-up Course overview References & Sources

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

StartObjectives Appetizer for the Course. Know how to compile and run Java

3D programs. Know where to search in case of

troubles or further interest.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

StartForeword Determine the correct color for

every pixel. This course is programming

oriented. Why to learn Java 3D?

It is object oriented. It is 3D. It is fun.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Start Installing Java 3D School PCs have Java 3D installed

Make sure that JDK 1.2.2 or later has been initialized (NAL -> Java -> Initialize ...).

The SUN environment does not include Java 3D per default

Check web-page for details and troubleshooting

# Add some directories to your PATH#original: PATH ${HOME}/bin:${PATH}:PATH /tools/java/JDK-1.2-AND-Java3D-1.1/bin:${HOME}/bin:${PATH}:

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Start Running Java 3D Programs Copy source from intranet

It is so simple – but IF... have a look on the web page for troubleshooting (all JARs at the right place, also in the JRE?).

>javac Program.java>java Program

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

StartWarm-up Simply let us try some examples...!

http://www.hta-bi.bfh.ch/~rfs/pwf/java3/Chapter Start, paragraph Warm-up.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Start Course Overview

Date Subject Remark23.10.00 Start / Introduction to Computer Graphics30.10.00 Hello World! / The Virtual Universe Tutorial Chapter 1, 2

6.11.00 Transformations / SceneBuilder13.11.00 Creating Geometry / Easier Content

CreationTutorial Chapter 2, 3

20.11.00 Interaction Tutorial Chapter 427.11.00 Animation Tutorial Chapter 5

4.12.00 Lights Tutorial Chapter 611.12.00 Textures Tutorial Chapter 718.12.00 Spline, Ray-Tracing, Future

8.1.01 Project Work Kick-off Project work by one, two or three people. Proposals for projects will be accepted.15.1.01 Project Work

22.1.01 Project Work29.1.01 Project Work

5.2.01 Project Work12.2.01 Project Work19.2.01 Project Work26.2.01 Presentations of the Project Works

5.3.01 Holiday

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Start References & Sources SUN and intranet web pages, links

found in documentation. Use the glossary, it makes live

easier if you know about what exactly you are talking.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Intro to Computer Graphics Why Java 3D 2D versus 3D Color Models Hardware Java 3D Tutorial

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsObjectives Understand some essential basics

of computer graphics like color models.

Get an idea of what hardware is involved if doing computer graphics.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsWhy Java 3D 3D-modelers like Art*lantis

Easy content creation Pre-programmed „static“ behaviour Many pre-defined shapes, extrusions, textures...

3D-languages like Java 3D or OpenGL High degree of user interaction Start on the „green field“ Create new 3D applications (CAD, Simulator, ...)

3D-renderers like PovRay No interaction, only one picture

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer Graphics2D versus 3D 2D

R2 => R2

Simply two dimensional picture on 2D-Screen.

3D R3 => R2

Match three dimensional mathematical model to two dimensional Screen.

A new approach are Holography techniques R3 => R3 but that‘s maybe beyond the scope of this course...

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsColor Models RGB is the most most important

color model for computer graphics. Additive system Red, Green, Blue, 8bit each Java 3D: each color has values 0..1 Application example: ColorSpace

Other systems: CMYK, HSB...

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsHardware (1) Graphic Cards minimize processor load by

executing graphic commands in hardware. DirectX OpenGL

Raster Screen have an x-y pixel array (=raster) to display our graphics CRT LCD Counterpart: Vector graphic devices such as

analog cathode-ray oscilloscopes.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsHardware (2)

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Introduction to Computer GraphicsJava 3D Tutorial Tutorial by SUN Great (as usual, it is SUN...) Use this and the API as your

reference!

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual Universe Basics Scene Graph Locales Content Branch View Branch Understanding MyUniverse Recipe for a simple Program

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseObjectives Know what a virtual universe and a

scene graph is. Understand the basic parts and

elements of a scene graph. Know the basic recipe for a Java 3D

program.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseBasics A virtual universe can be seen as a 1:1

representation of our own universe. Represent structures from astronomical to

subatomic. Floating point 3D space: 2^256 (!!) for each

x,y,z. Decimal point for 1 meter at 2^128 ->

incredible precision at incredible extend. There is one VU-instance only (Singleton).

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseScene Graph (1) Scene Graph is the

graphical representation of the objects in our VU.

Directed Acyclic Graph (Tree) Nodes, arcs, parents,

childs, leaves, references and other objects.

VirtualUniverse

Locale

Group

Leaf

NodeComponent Other objects

Reference

Link

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseScene Graph (2) A Java 3D program may have more

objects than those in the scene graph.

A scene graph drawing is the correct documentation for the 3D part of a Java 3D program.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseScene Graph (3) Basic parts of a

scene graph myVirtualUniverse

myLocale

BranchGroup

BranchGroup

a3Dobject myViewPlatform

ViewBranch

Content Branch

Locale(s)

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseLocales (1) How to handle the huge extend of

a virtual universe efficiently? Our virtual universe contains at

least one Locale. The locale is a 3D-reference point

inside the virtual universe.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseLocales (2) Standard Locale resides at (0,0,0) in the

VU. We can have several Locales, eg:

One as reference point of the swiss coordinate system (located in Bordeaux, France).

A second as the architects reference point of a building plan.

The both are related, but depending on the point of view it is more convenient (and precise) to work with one or the other.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseContent Branch (1) Contains all „visible“ objects of our

scene. Contains all transformations for

those objects (displacement, animation, ...).

We distinguish between group nodes and leaf nodes (see following slide).

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseContent Branch (2) The most

common object types Branch

Group

Shape3DAppearance

TransformGroup

...

...

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseView Branch

The Canvas3D will be inserted in our application or applet -> most important!

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseRecipe for a simple Program1. Create a Frame & a

Canvas3D object.2. Create a SimpleUniverse

object which gets a reference to the Canvas3D.

3. Construct the content branch.4. Insert the content branch into

the Locale of the SimpleUniverse.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

The Virtual UniverseExercises Check Web-Page, chapter

„Virtual Universe“

http://www.hta-bi.bfh.ch/~rfs/pwf/java3/

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello World The Java 3D API Finally: Hello World! Source Code Class Diagram of HelloJava3D What happens when running? Exercises

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldObjectives Understand the high-level

structure of the APIs involved in a Java 3D program.

Understand the code of the HelloJava3Da example line by line.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldThe Java 3D API Packages related to the Java 3D

API: Core classes: javax.media.j3d Utility classes: com.sun.j3d.utils Math classes: javax.vecmath AWT classes: javax.swing

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldFinally: Hello World! Probably the most

simple Scene Graph

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldSource Codepublic class HelloJava3Da extends Applet { public HelloJava3Da() { setLayout(new BorderLayout()); Canvas3D canvas3D = new Canvas3D(null); add("Center", canvas3D);

SimpleUniverse simpleU = new SimpleUniverse(canvas3D); simpleU.getViewingPlatform().setNominalViewingTransform();

BranchGroup scene = createSceneGraph(); simpleU.addBranchGraph(scene); }

public BranchGroup createSceneGraph() { BranchGroup objRoot = new BranchGroup(); objRoot.addChild(new ColorCube(0.4));

return objRoot; }

public static void main(String[] args) { Frame frame = new MainFrame(new HelloJava3Da(), 256, 256); }}

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldClass Diagram of HelloJava3D

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldWhat happens when running?while (true) {

Process inputPerform Behaviours //none at the momentTraverse scene graph and render visual objectsif (request to exit) break

}Cleanup and exit

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Hello WorldExercises Check Web-Page, chapter „Hello

World“

http://www.hta-bi.bfh.ch/~rfs/pwf/java3/

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating Content Geometic Utility Classes Mathematical Classes Geometry Classes GeometryArray Classes GeometryStrip Array Classes Indexed Geometry Appearance and Attributes Point- + LineAttributes PolygonAttributes

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentObjectives Get an overview on how to handle

polygones in Java 3D. Know the most important

attributes that determine the look of a polygone.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentGeometric Utility Classes

Box (2x2x2 m)

Cone (Ø2m, height 2m)

Cylinder (Ø2m, height 2m)

Sphere (Ø2m)

Default color white

Tutorial Page 2-6

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentMathematical Classes (1) Tuples are simply pairs or triples of

numbers. For each vertex there can be up to

four javax.vecmath objects: Points for coordinates Colors Vectors for normals TexCoords for texture coordinates

Tutorial Page 2-15

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentMathematical Classes (2) Vectors: mostly used for normals

and position information in 3D-space.

Normals: determined using the right hand (remember: we have a right-handed system).

P0

P1

P2n

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentGeometry Classes What to do if our shape is not a

box or a cylinder? Create Shape3D-object, use

setGeometry() method! For a triangle:

Three-element array One point per element

Tutorial Page 2-20

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentGeometryArray Classes Most primitive form to create shapes:

Points or lines are one pixel wide per default.

Colors are interpolated from vertex to vertex if specified.(see code page 2-24, line 9+10)

Tutorial Page 2-21

2-26

P0 P1

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentGeometryStripArray Classes More convenient: share some

vertices:

Example Yoyo: Ever tried to model a Jumbo-Jet by hand? Often geometry is generated by mathematical calculations.

Tutorial Page 2-27

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentIndexed Geometry Best re-use of vertices but we lose

performance using the index array.

Tutorial Page 2-27

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentAppearance and Attributes Appearance class does not specify

the appearance directrly but contains many links to appearance objects:

Tutorial Page 2-34

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentPoint- + LineAttributes Points and Lines are 1 pixel wide

by default. Zooming does not affect this.

Let‘s try to change: Thikness of the line Antialiasing

Tutorial Page 2-37

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Creating ContentPolygonAttributes We can set the PolygonMode:

Fill: fill the interior of the polygones Line: connect vertices with lines

(„Drahtigttermodell“) Point: draw only points at the vertices

Face culling: Hide front, back or none of the faces of a polygon.

Tutorial Page 2-38

2-42

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content Creation Class Loaders Handle a bunch of objects Text in 2D and 3D Background Bounding Leaf

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationObjectives Be able to load and display non-

Java 3D objects in a scene. Understand background and

bounding leaf and why one of the two is not enough.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationClass Loaders Load 3D scene files and create Java 3D

representations (branch graph). Read and parse file Create Java 3D objects Return branch group object with all the scene

contents Insert branch group in the scene

-> J3D API Demos: ..\ObjLoad\java ObjLoad ..\geometry\galleon.obj

Tutorial Page 3-2

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationHandle a bunch of points First create a GeometryInfo object. Now many operations can be

performed on this object (and on our data): Generate Normals „Stripifying“ „Compacting“

Example: GeometryInfoApp.java

Tutorial Page 3-7

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationText in 2D and 3D Text2D creates a rectangular

polygone and a texture on it. Text3D creates geometry objects

for the text that have an extrusion.

Tutorial Page 3-13

3-16

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationBackground Background can be a solid color,

an image and/or a geometry. Background is infinitely far away,

you can not go or see what‘s behind.

Tutorial Page 3-22

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Easier Content CreationBounding Leaf Used for different classes: Light,

Fog, Behaviour or Background. Only an intersection with the

bounding leaf of such an object makes it visible.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Animation Interpolators Alpha Object Billboard Level of Detail (LOD) Morphing

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationObjectives Get an impression of the different

forms of animation. Be able to animate objects using

an Interpolator and Alpha object.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationInterpolators Change all important

3D-object data easily. Interpolators do not

change the corresponding value automatically -> Alpha object needed.

Tutorial Page 5-11

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationAlpha Object (1)

Tutorial Page 5-7

Alpha objects generate events distributed over time.

They are used as trigger events for the interpolators.

Some of the possible wave-forms f(t):

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationAlpha Object (2)

Tutorial Page 5-7

AlphaAtOneDuration

PhaseDelayDuration AlphaAtZeroDurationTriggerTime

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationPut it together

TransformGroup objRotate = new TransformGroup();objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);

Alpha alpha = new Alpha ();

RotationInterpolator rotInt = new RotationInterpolator (alpha, objRotate);rotInt.setSchedulingBounds(bounds);

objRotate

rotIntalpha

Trigger events

Change Transform3D

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationBillboard Show complex (background)

geometry, e.g. trees. Troubles with different views. These objects are flat:

Tutorial Page 5-26

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationLevel of Detail (LOD) As closer you are as more details

you want to see -> LOD. Several childs of a Switch node,

choose the right one. Long developement time for

creating the objects with different detail levels.

Tutorial Page 5-30

5-31

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationMorphing „Interpolator for geometry“. You have to define the key frames. The Morph class will interpolate

between the key frames. -> Try the Java 3D example \jdk1.3\

demo\java3d\Morphing\Morphing.java

Tutorial Page 5-36

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

AnimationExercises Find description on the web page

(chapter animation):www.hta-bi.bfh.ch/~rfs/pwf/java3/

Tutorial Page 5-36

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Lights Java 3D Lighting Model Influence Different Light Types Mixing Lights Material Objects Other Coloring Possibilities Shadows

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsObjectives Understand the Java 3D lighting

system. Know about the different ways to

give a color to an object. Recall the theory about additive

light mixing.

Tutorial Page 6-2

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsJava 3D Lighting Model There are three different reflections:

Ambient (caused by ambient light) Diffuse („normal“ reflection) Specular (highlight reflections of polished

material) No inter-object reflections in Java 3D. Light sources are not visible itself.

Tutorial Page 6-2

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsInfluence There is no warning for leaving

light out of a scene. There is no warning for not setting

a light source its influencing bounds.

Some light types have a attenuation setting.

Tutorial Page 6-8 6-9

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsDifferent Light Types Ambient light

As if the sky was cloudy. Directional light

For the virtual „sun“. Point light

For virtual lamps. Spot light

Virtual spot lamps.

Tutorial Page 6-11 ff

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsMixing Light Why does an object appear in a

certain color? White sphere, red and blue light ->

result?

Tutorial Page 6-17

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsMaterial Object Color settings of the material

object represent „reflection coefficients“.

Shininess is an interesting value.

Tutorial Page 6-21

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsOther Coloring Possibilities No lights needed, but no „shiny“

effects: ColoringAttributes Per-vertex color (KickCan example:

class Floor).

Tutorial Page 6-23

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

LightsShadows There are no built-in shadows in

Java 3D. Shadows in the tutorial are created

using hand-made classes and polygones.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Textures Basic Principles Create a Simple Texture

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

TexturesObjectives Know what a texture is and why

we need it. Be able to program simple

textures.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

TexturesBasic Principles Detailed surface structures are

hard and expensive to build in 3D -> Texture!

„Texel“ is „texture element“ -> one pixel of a texture.

Texture mapping: Fit image to a given geometry.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

TexturesCreate a Simple Texture Load an image

Create a texture

Create 3D-object with appearance

String filename = "earth.jpg"; TextureLoader loader = new TextureLoader(filename, this);ImageComponent2D image = loader.getImage();

Texture2D texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA, image.getWidth(), image.getHeight());texture.setImage(0, image);

Appearance appear = new Appearance(); appear.setTexture(texture);

Sphere earth = new Sphere(1.0f, Primitive.GENERATE_TEXTURE_COORDS, appear));

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project Information Gathering Set-up Deliverables

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

ProjectObjectives Apply all what you have learned. Learn more of the Java 3D API and

3D computer graphics. Know what you want to do ->

concept, system design, ...

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

ProjectInformation Gathering Search the web, get ideas. Do a brain storming or something

similar -> write down your ideas. Form project groups. Discuss your ideas so that you get

ready to start with a concept.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

ProjectSet-up Participants of the project. Discussed your idea with the

teacher.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

ProjectDeliverables The deliverables are: source and

documentation of the project. Documentation as HTML page or

paper. Turn in source and documentation:

ZIP file by mail (or link for download if size > 1MB)

or CD-ROM

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More... Spline Functions 3D-modelling Professional Rendering POVRay Example

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More…Objectives Get a little outlook on what

happens outside of Java 3D. Have an idea of professional tools

used in computer graphics. Hands-on experience with POVRay.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More…Spline Functions Base: Spline Functions Applications of Spline Functions in:

Spline Curves, Spline Surfaces Advantages: Smooth surfaces (!) Application in Java 3D:

com.sun.j3d.utils.behaviors.interpolators.TCBSplineInterpolator

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More…3D-modelling LightWave (www.newtek.com) ZOOM

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More…Professional Rendering Rendering for films like Toy Story or

Titanic is done with rendering products. Performance is far from real time but the

experience pretty close to real world. Examples of Products:

PRMan (www.pixar.com) BMRT (www.bmrt.org) POVRay (www.povray.org)

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

A Bit More…POVRay Example Download POVRay from

ftp.hta-bi.bfh.ch (Windows Version) Install locally Create a ready-made scene Play around

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

ProjectWhat to do? A Paper describing a 3D computer

graphics related aspect. A Java 3D program (little demo,

game, a start for a bigger project…). A demo with an other 3D software

(PRMan, BRMT, PovRay). A picture of a 3D-contest (e.g.

PovRay).

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project Presentations Deliverables Presentations!

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project PresentationsDeliverables Turn in source and documentation:

ZIP file by mail (or link for download)or CD-ROM

Due Date: 2nd March 2001rfs@hta-bi.bfh.ch

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project PresentationsPresentations!

1 Daniel Glauser 3D-Bomberman2 Ramon Keller 3D-Schach3 Nicolas Leuba Fisch-Aquarium4 Roger Mathys

Pascal MoserMurmelbahn

5 Philippe SchnyderPhilippe SchochMarkus Trachsel

3D-Würfel

6 Stefan Rufer RenderMan / BMRT

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project RenderMan / BMRT What is RenderMan? What is BMRT? What is Radiosity?

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project RenderMan / BMRTWhat is RenderMan? Open interface by Pixar. Interface for 3D-model rendering. Provides extension possibilities for

custom shading and gadgets. This is NOT an implementation.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project RenderMan / BMRTWhat is BMRT? BMRT is a free 3D-renderer by

BlueMountain Corp. BMRT is partly RenderMan compatible. Contains various tools. Most important:

rgl: Simple, fast renderer for previews. rendrib: High-end renderer providing ray-

tracing, radiosity, programmable shading…

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project RenderMan / BMRTWhat is Radiosity? Imagine: Blue room with white chair

chair appears a bit blue! Compute diffuse, inter-object

reflections RayTracing uses AmbientLight to

simulate this not too good. Radiosity approximates diffuse, inter-

object reflections.

Stefan Rufer, HTA Biel, 2000 Java 3D – an Introduction

Project RenderMan / BMRTRadiosity examples

rendribquality

rglpreview