1. Comparative Navigation System for Collaborative Project The 15-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision’2007, Plzen, Czech Republic Sooyeon OH Universal City Group, National Institute of Information and Communications Technology, JAPAN Wookhyun YEO Department Housing & Interior Design, Yonsei University, KOREA

2. WSCG'2007, Plzen, Czech Republic Contents ・ Objectives ・ Concept ・ Technology ・ Prototype system ・ Conclusion

3. WSCG'2007, Plzen, Czech Republic Objectives To create content that can be shown to the general public to improve their understanding of architectural research To develop a system for architectural design proposals and to put these digital archives to practical use To develop a system that many users can easily use via the Internet

4. WSCG'2007, Plzen, Czech Republic Concept Examination of architectural design proposal based on comparison Comparison effectively improves understanding Consideration of differences reveals and clarifies contents Comparison of different contents clarifies relationships, effects, and causal relations

5. WSCG'2007, Plzen, Czech Republic System Development System developed using various tools, including modeling and image-editing tools GUI developed using Microsoft© DirectX Graphics® API-based Virtools®

6. WSCG'2007, Plzen, Czech Republic Scene Development

7. WSCG'2007, Plzen, Czech Republic System Requirements High-speed rendering Lightweight 3D data Easy-to-use interface

8. WSCG'2007, Plzen, Czech Republic System Configuration PC Network distribution server

9. WSCG'2007, Plzen, Czech Republic Process Flow 2.Data converting and scene creating 3.Attribute/ behavior assigning and GUI creating 4.Testing and debugging 1. Database 3D objects (3D model data, GIS data) 2D contents (Photo, Texture, and Text) Data converted using modeler. Scenes formed by grouping models. Attributes/behaviors assigned to objects (camera, light, collision detection, LOD, gravity, etc.) 3D objects exported to navigation system 5.Data block and scene Saving Data gathered from modeling.

10. WSCG'2007, Plzen, Czech Republic GUI Operation Interface applet Camera-free operation One-screen mode Two-screen mode Real time simulation applet 3D Database of model applet Four-screen mode Camera-fixed operation Top Page

11. WSCG'2007, Plzen, Czech Republic System Functions 3D Space Move Plug-in Concurrent Comparison Navigation Function Cross-section View

12. WSCG'2007, Plzen, Czech Republic Concurrent Comparison Navigation One-screen mode ・ Superposition comparison ・ Object-inserting comparison Two-screen mode ・ Vertical/Horizontal screen division ・ Guide screen Four-screen mode ・ Photograph/model comparison

13. WSCG'2007, Plzen, Czech Republic Summary To develop a shared 3D environment that enables users to see and understand 3D contents collaboratively, we… developed a prototype interactive collaborative architectural design system using comparison functions. validated system usability via user evaluations.

14. WSCG'2007, Plzen, Czech Republic Future Work Expand of comparison content Pursue of system extension Develop an easier to-use-GUI

15. WSCG'2007, Plzen, Czech Republic Contact Send your comments and questions to Me, Sooyeon Oh, at sooyeon@nict.go.jp