Visualization with help from SCVVisualization with help from SCV

Erik Brisson

Boston University

Scientific Computing and Visualization

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How can we help?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 supportPackages we support

Mathematics and Data AnalysisMathematicaMATLABIDL

Scientific VisualizationVTK(Paraview)

Modeling, Rendering, and AnimationMayaOpenGL(OpenSceneGraph)

Image ToolsImageMagick

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R.I.P.R.I.P.

SGI (NAG) Explorer, AVS, OpenDX

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Example math / analysis package (IDL)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, psym=1, x, y

ypoly = poly_fit(x, y, 3)

yapprox = ypoly(0) + ypoly(1)*x + ypoly(2)*x^2 + ypoly(3)*x^3

print, 'yapprox'

print, yapprox

oplot, x, yapprox

end

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Output from IDL programOutput from IDL program

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Plot from IDL programPlot from IDL program

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More from IDLMore from IDL

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VTK (Visualization Tool Kit)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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ParaviewParaview

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ParaviewParaview

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More general graphics softwareMore general graphics software

Maya

OpenGL

OpenSceneGraph

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Maya rendered: vortex sheddingMaya rendered: vortex shedding

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Maya rendered: Fan pressureMaya rendered: Fan pressure

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Maya rendered: Fan entropy isosurfaceMaya rendered: Fan entropy isosurface

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Virtual EnvironmentsVirtual Environments

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What's in a virtual world?What's in a virtual world?

An environment

Representations of physical objectsVisual models

Auditory elements

Interactions with objects

Representations of people - avatars

CommunicationGesturing

Typing / chatting

Telephony

Video

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Our goal with DAFFIEOur goal with DAFFIE

Distributed, interactive virtual environmentDistributed

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 systemThe DAFFIE event system

Communication between agents

Navigator Viewer

Navigator

Viewer

Sound server

Event Server

App agent

App agent

App agent

Telephony Video agent

Sound server

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darp scripts: arproom filedarp scripts: arproom filearproom 2.0

name cart-modelsenter_xyz 3.0 4.0 4.0enter_hpr 30.0 -98.0 0.0

group_xyz 0 0 0group_hpr 0 0 0group_path ../models/purple_cube/group purple_cube.arpg

group_xyz 2 -4 0group_hpr 60 0 0group_path ../models/blue_cube/group blue_cube.arpg

group_xyz -3 -5 2group_hpr 0 0 0group_path ../models/orange_sphere/group orange_sphere.arpg

end

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The DVD WallThe DVD Wall

Tiled, rear projected, passive stereo display system

Based on commodity components