An OfftheShelf Architecture for Rendering X3D Content on Mobile Devices

1
An Off-the-Shelf Architecture for Rendering X3D
Content on Mobile Devices

• Ching-Long Yeh and Shao-Fong Yeh
• Department of Computer Science and Engineering
• Tatung University
• Taipei
• Taiwan

2
Outline

• Introduction
• Background
• Analysis and Design
• Implementation
• Conclusion and Future Work

3
Introduction

• Motivation
• Why 3D ?
• Mobile 3D API
• OpenGL ES,Direct3Dm,J2ME JSR-184
• X3D
• 3D content
• Easy-to-use
• Cross-Platform
• Mobile device
• 3D MMI
• 3D Game
• Any 3D application

4
Background

• X3D
• Advantages
• X3D content is modular and reusable
• XML encoding
• Easy-to-use
• Cross-platform
• Disadvantage
• Need a browser

5
Background

• ltX3D profile"Immersive"gt
• ltScenegt
• ltTransform translation"3 0 -2"gt
• ltShapegt
• ltAppearancegt
• ltMaterial diffuseColor"1 0 0" /gt
• lt/Appearancegt
• ltCone bottomRadius"1.0" height"4.0" /gt
• lt/Shapegt
• lt/Transformgt
• lt/Scenegt
• lt/X3Dgt

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Background

• JSR-184
• Mobile 3D Graphics API for J2ME
• CLDC 1.1, MIDP 2.0
• retained mode, immediate mode
• JSR-172
• J2ME Web Service API (WSA)
• CLDC 1.0 1.1
• SOAP 1.1, WSDL 1.1

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Analysis and Design

• Problem Analysis
• Energy consumption issues
• Limited CPU and memory
• Parsing X3D is a complex job

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Analysis and Design

• System Overview

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Analysis and Design

• System Design
• Function Description
• Get X3D files through Internet
• Parsing X3D files
• User Interface
• Event Manager
• Scene Display

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Analysis and Design

• User Interface

Y-axis
X-axis
Z-axis
Z-axis
Y-axis
X-axis
Translation/Rotation
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Analysis and Design

• System Architecture

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Analysis and Design

• Process Flow

13
Implementation

• Development Environment

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X3D Nodes

• Grouping
• Transform
• Geometry 3D
• Box, Cone, Cylinder, Sphere
• Navigation
• Viewpoint
• Shape
• Material

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Implementation

• Implementation of the Main Components

JAXP API W3C DOM API
Change the status of X3D nodes
X3Dl Library JSR-184 calls
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Implementation

• Demo
• 3D scene
• Magic Cube
• Reversi
• 3D Dial-up interface

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3D Scene
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Magic Cube
Rotate the cube with X-axis
Left part of the Cube
Right part of the Cube
Rotate the cube with X-axis
Left part of the Cube
Right part of the Cube
Rotate the cube with Y-axis
Top part of the Cube
Bottom part of the Cube
Rotate the cube with Y-axis
Top part of the Cube
Bottom part of the Cube
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Reversi
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3D Dial-up interface
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Conclusion and Future Work

• Conclusion
• We design and implement an X3D browser for mobile
  devices
• We also implement some applications of X3D on
  mobile devices with our browser

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Conclusion and Future Work

• Future Work
• Able to support more X3D nodes
• Try another 3D API for mobile device such as
  OpenGL ES to increase the performance
• Create more 3D applications to display by using
  our browser

23

• Thank You