Virtual Worlds Lab www'cc'gatech'eduvwlab cdshawcc'gatech'edu

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Virtual Worlds Labwww.cc.gatech.edu/vwlabcdshaw
_at_cc.gatech.edu

• Areas of research
• Virtual Environments,
• Scientific Geospatial Information
  Visualization

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Time Dependent Volume Data Doppler Radar Weather
Schematic of Doppler radar
Multiple radars
Side view of Doppler radar with regions of higher
confidence sampling
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Navigating and Exploring a Severe Storm
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Tracker-Based 12 DoF Two-Handed Surface Editor
Part of the NFS/ITR Digital Clay Project. (gave
BrownBag talk on 09/05 this year) Chris Shaw,
Jarek Rossignac, Ignacio Llamas, ByungMoon Kim,
Joshua Gargus and Jesse Shieh
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Test System Meshculptor

• Grab a part or parts of the object and pull or
  push (6 DoF per tracker/hand)
• Translucent spheres around cursors represent area
  of influence
• Result plastic-like deformation
• Behind scenes space warp, no physical model

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Two-Handed Interaction

• Multiple Possibilities
• 1. One hand is used for context manipulation
  while the other one is deforming the object
• 2. Both hands are used simultaneously for object
  deformation
• 3. Combining 1. and 2. can switch hand from
  deforming to manipulating context

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BioInformatics Visualization

• Infinitely scalable, zoomable genome visual
  interface and database
• Visualize entire genomes
• Examine protein structures

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BioInformatics Visualization
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BioInformatics Visualization
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Firefighter Training VE

• Fire in single family home.
• Intended user is a commanding officer trainee.
• User issues commands to virtual firefighters.
• Operator translates voice commands.
• Virtual firefighters perform instructed tasks.
• The fire simulation reacts to the tasks
  performed.

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System Architecture
SVE
Operator

• Virtual Environment
• House
• Firefighter Animations
• Tools
• Volume Renderer

Graphical Command Interface
FDS
Fire Simulation Volume Data
1 volume / sec
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Graphical Command Interface

• Contains House Map
• List Firefighters
• Each firefighter can be issued commands by menu
• Firefighters are represented by icons on the map.

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Firefighter Training VE

• Simple Virtual Environments (SVE)
• Extensible framework for building VE applications
  
• Scene Graph, Tracker Drivers
• Provides support for rapid prototyping as well as
  complete implementation of simple and complex VE
  applications.

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Firefighters performing various tasks
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Cutting
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Chopping
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Carrying Ladder
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Climbing Ladder
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Cutting hole in roof
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Pulling Hose Fire Smoke in background
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Pulling Hose Smoke in background
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Fire Simulation

• NIST Fire Dynamic Simulator (FDS)
• Computational fluid dynamics (CFD) model of
  fire-driven fluid flow.
• We model the house offline
• Extract fire and smoke data for the entire house
  volume at one-second increments.
• NISTs Smokeview can be used to visualize FDS
  data.

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Volume Data

• Pre-computed data from FDS
• Heat Release Rate per unit Volume (HRRPUV)
• Soot Density
• 1 voxel array per second 166 x 81 x 21
• Run Length Encoding (RLE) Compression
• Quantized to 8 bits per voxel
• 2MB 160KB per time step
• Lorenzo compression
• 2MB 10KB per time step

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Volume Rendering

• Splat based renderer
• Retrieve values for each voxel
• Draw gaussian texture with color and opacity
  determined by voxel value
• If HRRPUV gt min(HRRPUV)
• Draw Flame
• Else
• Draw Smoke

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Fire and Smoke in background
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Fire and Smoke
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Scientific Information Visualization

• Visualization of 3D Scalar and Vector fields
• Glyph visualization
• Each data location in 3D represented by a glyph
• Data dimensions map to glyph visual dimensions
• 3D scale, orientation, color, opacity
• Eg. 3D Vector display, 3D scatterplot.

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Scientific Info Viz

• Glyph Visualization

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Information Visualization

• XGold
• YUS
• ZFederal Reserve
• GlyphStock
• ColorNoriega

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Desktop VR Visualization

• Access to desktop
• Stereo viewing
• Two-handed interaction
• 3-space trackers with buttons
• Each hand has a distinct role
• Left hand sets up context
• Right hand performs fine manipulation

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Ringos Underwater Adventure

• Description an immersive 3D virtual environment
  
• Goal to reduce the pain and anxiety associated
  with childrens cancer treatment
• Method draws attention away from discomfort by
  engaging children in the interactive and
  exploratory game

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Screenshots
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Screenshots
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Screenshots
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Screenshots
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Screenshots
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How Do I Get Involved?

• 4903 Research Projects
• Come to our meetings
• CS 8001 VW in CRB 303