Non-Invasive Interactive Visualization of Architectural Environments Christopher NiederauerU.C. Santa Barbara Mike HoustonStanford University Maneesh AgrawalaMicrosoft.

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Presentation transcript:

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

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

Motivation

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

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

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

446 Gather Architectural Data Create Histogram Height Ceiling Area Geometric AnalysisRendering OpenGL Stream … Floor Composite Soda Hall Side Profile Find Splits Gather Data

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

Offset Ceiling Heights

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

Cluster Speedup Composite Floor 1 Floor 2Floor 3 Complete Model

Soda Hall Trackball Walkthrough

Results with Soda Hall (Single Floor)

Quake III: Arena Trackball Walkthrough

Results with Quake III: Arena (Single Floor) Item

Video

Transparent Back-Faces

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

Future Directions [Salomon et al, 2003]

Future Directions (Hand Designed Mock-up)

Summary and Conclusions Can improve viewer comprehension

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