在本論文裡，我們發展一個基於口袋型電腦的隱函數設計3D物件系統，這個系統可以讓使用者在任何地方任何時間輕易的設計並觀賞到他們所設計的3D物件。隨著無線技術的提升，口袋型電腦可由WLAN、GPRS、WCDMA輕易的連結上網際網路。口袋型電腦有限的硬體導致運算能力不足所產生的問題可以用client-server模型解決。這個模型將複雜的運算移到工作站並且傳回多邊形的資料到口袋型電腦電腦上。採用我們所發展的系統，無論在哪裡，使用者可以設計並欣賞到他們的創意所產生的3D物件。

In this thesis, we develops a Pocket PC-based 3D object design system using implicit functions, which allows users to design and view 3D objects easily at anytime and anywhere. With the growing wireless techniques, Pocket PC can easily connect to the Internet via WLAN, GPRS, WCDMA, etc. The problems of insufficient computing power caused by the limited hardware on Pocket PCs can be solved by the client-server model, which performs complex computation on the workstation, and transmit polygon mesh data to the Pocket PC. Via the proposed system, one can design and visualize his any innovative ideas instantly wherever he is.

Chapter 1 Introduction 6
Chapter 2 Background Materials 8
2.1 Implicit Function 8
2.1.1 Primitive Function 8
2.1.2 Blending Operator 9
2.2 3D Object Design System using Implicit Functions 10
2.3 Pocket GL 13
2.4 Client-Server Model 14
2.5 Software on Pocket PC 15
Chapter 3 System Architecture 18
3.1 Client Layer 19
3.1.1 Graphic User Interface (GUI) 19
3.1.2 Constructive Tree Handler 20
3.1.3 Network Handler (Client) 21
3.1.4 3D Scene Graph Rendering Subsystem 21
3.2 Server Layer 22
3.2.1 Network Handler (Server) 22
3.2.2 The Implicit Function Operating Subsystem 22
3.2.3 Polygon Translation Component 23
3.3 Interaction between Network Handler 23
(Client and Server) 23
Chapter 4 Implementation 25
4.1 System Environment 25
4.2 The Primitive Functions in the System 26
4.3 Implementation of Constructive Tree 28
4.4 Implementation of Network Handler 30
4.5 The Procedure of Editing 3D Object 31
4.6 Performance Evaluation 35
Chapter 5 Conclusion and Future work 37

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