NonInvasive Interactive Visualization of Architectural Environments

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Non-Invasive Interactive Visualization of
Architectural Environments

• Christopher Niederauer U.C. Santa Barbara
• Mike Houston Stanford University
• Maneesh Agrawala Microsoft Research
• Greg Humphreys University of Virginia

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Motivation
Trackball style manipulator
Walkthrough
ArcBall Shoemake 1992
Teller 1992
Cant see overall interior/exterior structure!
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Motivation
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The Idea

• Exploded view
• Non-Invasive
• Mohr 2001

Overall structure is visible!
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How Its Done

• Example Architecture Soda Hall
• Geometric Analysis (Pre-Process)
• Rendering

Geometric Analysis
Rendering
Floor
Gather Data
Find Splits
Composite

OpenGL Stream
Floor
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Gather Architectural Data

• Intercept the OpenGL stream
• Find downward facing polygons
• Requires up-vector

up
Geometric Analysis
Rendering
Floor
OpenGL Stream
Find Splits
Gather Data
Composite

Floor
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Gather Architectural Data

• Create Histogram

Height Ceiling Area
942
766
606
446
286
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Soda Hall Side Profile
Geometric Analysis
Rendering
Floor
OpenGL Stream
Find Splits
Gather Data
Composite

Floor
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Find Splitting Heights
Geometric Analysis
Rendering
Floor
OpenGL Stream
Find Splits
Gather Data
Composite

Floor
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Offset Ceiling Heights
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Offset Ceiling Heights
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Rendering

• Multiple Playback
• (Once per Floor)
• Clipping Planes
• Viewpoint Control

Geometric Analysis
Rendering
Floor
OpenGL Stream
Gather Data
Find Splits
Composite

Floor
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Cluster Speedup
Floor 1
Floor 2
Floor 3
Complete Model
Composite
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Soda Hall
Trackball
Walkthrough
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Results with Soda Hall
(Single Floor)
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Quake III Arena
Trackball
Walkthrough
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Results with Quake III Arena
(Single Floor)
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Video
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Transparent Back-Faces
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Future Directions

• Make fully automated
• Semantic inputs
• Up vector
• Number of stories to split into

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Future Directions
Salomon et al, 2003
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Future Directions
(Hand Designed Mock-up)
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Summary and Conclusions

• Can improve viewer comprehension

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Acknowledgements

• Pat Hanrahan
• John Carmack
• Christopher August
• DOE VIEWS Grant B504665

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