1. Non-Invasive Interactive Visualization of Architectural Environments Christopher NiederauerU.C. Santa Barbara Mike HoustonStanford University Maneesh AgrawalaMicrosoft Research Greg HumphreysUniversity of Virginia

2. Motivation Trackball style manipulator Walkthrough Can’t see overall interior/exterior structure! ArcBall [Shoemake 1992][Teller 1992]

3. Motivation

4. The Idea Exploded view Non-Invasive [Mohr 2001] Overall structure is visible!

5. How It’s Done Example Architecture: Soda Hall –Geometric Analysis (Pre-Process) –Rendering Geometric AnalysisRendering Gather Data Find Splits OpenGL Stream … Floor Composite

6. Gather Architectural Data Intercept the OpenGL stream –Find downward facing polygons Requires up-vector Geometric AnalysisRendering Find Splits OpenGL Stream … Floor Composite up Gather Data

7. 446 Gather Architectural Data Create Histogram 286 126 Height Ceiling Area Geometric AnalysisRendering OpenGL Stream … Floor Composite Soda Hall Side Profile 606 766 942 Find Splits Gather Data

8. Find Splits Find Splitting Heights Geometric AnalysisRendering Gather Data OpenGL Stream … Floor Composite

9. Offset Ceiling Heights

11. Rendering Multiple Playback (Once per Floor) –Clipping Planes –Viewpoint Control Geometric AnalysisRendering Gather Data Find Splits OpenGL Stream … Floor Composite

12. Cluster Speedup Composite Floor 1 Floor 2Floor 3 Complete Model

13. Soda Hall Trackball Walkthrough

14. Results with Soda Hall (Single Floor)

15. Quake III: Arena Trackball Walkthrough

16. Results with Quake III: Arena (Single Floor) Item

17. Video

18. Transparent Back-Faces

19. Future Directions Make fully automated: –Semantic inputs Up vector Number of stories to split into

20. Future Directions [Salomon et al, 2003]

21. Future Directions (Hand Designed Mock-up)

22. Summary and Conclusions Can improve viewer comprehension

23. Acknowledgements Pat Hanrahan John Carmack Christopher August DOE VIEWS Grant #B504665