Visualization with help from SCV

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Visualization with help from SCV

• Erik Brisson
• Boston University
• Scientific Computing and Visualization

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How can we help?

• What software / viz tools to use
• Managing data
• Understanding problems
• Use of color, scale, etc
• Making animations
• Programming
• Data transfer
• Data conversion
• Custom / specialized tools

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Packages we support

• Mathematics and Data Analysis
• Mathematica
• MATLAB
• IDL
• Scientific Visualization
• VTK
• (Paraview)
• Modeling, Rendering, and Animation
• Maya
• OpenGL
• (OpenSceneGraph)
• Image Tools
• ImageMagick

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R.I.P.

• SGI (NAG) Explorer, AVS, OpenDX

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Example math / analysis package (IDL)

• File fit_xy.pro
• N 10
• xy fltarr(2,N)
• openr, 1, 'dat/ex_xy.dat'
• readf, 1, xy
• close, 1
• x xy(0,)
• y xy(1,)
• print, 'x'
• print, x
• print, 'y'
• print, y
• plot, psym1, x, y
• ypoly poly_fit(x, y, 3)
• yapprox ypoly(0) ypoly(1)x ypoly(2)x2
  ypoly(3)x3

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Output from IDL program

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Plot from IDL program

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More from IDL

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VTK (Visualization Tool Kit)

• Open source software
• C class libraries
• Tcl/Tk, Java, Python interface layers
• Supports scalars, vectors, tensors
• Supports specialized modeling and visualization
• techniques

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Paraview
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Paraview
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More general graphics software

• Maya
• OpenGL
• OpenSceneGraph

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Maya rendered vortex shedding
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Maya rendered Fan pressure
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Maya rendered Fan entropy isosurface
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Virtual Environments

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What's in a virtual world?

• An environment
• Representations of physical objects
• Visual models
• Auditory elements
• Interactions with objects
• Representations of people - avatars
• Communication
• Gesturing
• Typing / chatting
• Telephony
• Video

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Our goal with DAFFIE

• Distributed, interactive virtual environment
• Distributed
• Interactive
• Visually and aurally rich
• Input (models, images and sounds) from variety of
  available tools
• Simple import method
• Script driven
• Accessible to non-expert users
• Extensible by programmers

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The DAFFIE event system

• Communication between agents

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darp scripts arproom file

• arproom 2.0
• name cart-models
• enter_xyz 3.0 4.0 4.0
• enter_hpr 30.0 -98.0 0.0
• group_xyz 0 0 0
• group_hpr 0 0 0
• group_path ../models/purple_cube/
• group purple_cube.arpg
• group_xyz 2 -4 0
• group_hpr 60 0 0
• group_path ../models/blue_cube/
• group blue_cube.arpg
• group_xyz -3 -5 2
• group_hpr 0 0 0
• group_path ../models/orange_sphere/

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The DVD Wall

• Tiled, rear projected, passive stereo display
  system
• Based on commodity components