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Visualization Workshop
David BockVisualization Research Programmer
National Center for Supercomputing Applications - NCSA University of Illinois at Urbana-Champaign
Introduction to AVS
Wright State University
Agenda Introduction to AVS System design Getting started Break Overview tour of AVS The AVS Network Editor Building networks The AVS Geometry Viewer Importing data into AVS Break Work on your own: on-line demos, help, apps Wrap-up: questions, hand-outs
IntroductionWhat is AVS?
Application Visualization System Visual programming data visualization product. Provides
comprehensive suite of data visualization and analysis techniques that incorporates both traditional visualization tools such as 2D plots and graphs and image processing as well as advanced tools such as 3D interactive rendering and volume visualization.
Advanced Visual Systems, Inc. (http://www.avs.com) Initial development 1988 - Stardent Computer, Inc. Other product offerings include AVS/Express, OpenViz
IntroductionApplications
Medical Imaging Atmospheric Science GIS Mathematics Computational Fluid Dynamics Astrophysics Chemistry etc…
IntroductionPlatform Availability
UNIX Workstations Digital Equipment Corporation Hewlett Packard International Business Machines Silicon Graphics Sun Microsystems
AVS5 now supports the Linux Operating System
System DesignDesign Methodology
Modular architecture Categorizes 4 steps of visualization (Input, Filter, Map, Render) Breaks each category into small subtasks or modules
Visual programming Easy to use interface provides drag & drop construction Graphical connection of modules in data-flow environment
Networks Describes visual programming sessions Inter-connections of modules in data-flow environment Individual “applications” Share with colleagues
System DesignDesign Methodology
Multi-tiered user environment Application Users
want easy-to-use turnkey application to visualize their data Application Developers
create interactive, visual applications for users in their organizations or
for commercial distribution Application Programmers
develop custom techniques to extend module toolsuite
On-line documentation Detailed help facilities Extensive demo and application examples
System DesignAdvantages & Benefits
Scientist driven exploration Researcher is the visualization developer Can explore and experiment with different representations
Multiple visual representations Increases insight Multiple networks
Session sharing Saved networks can be shared among colleagues Sessions shared in addition to results
System DesignAdvantages & Benefits
Distributed For solutions to large-scale problems, AVS is designed to run in a
distributed environment AVS modules can execute and leverage remote machines Avoids need for data transfer AVS handles data format conversion issues
Extensible Custom module development Helpful software development tools - AVS Module Generator
International AVS Centre (IAC) (http://www.iavsc.org) Module repository (public-domain modules) User group, training materials
Getting StartedAVS execution environment
Directory structureLUI/ data/ include/ networks/
applications/ demo/ lib/ relnotes/
avs_library/ demosuite/ license/ runtime/
bin/ examples/ math/ test/
chem_lib/ filter/ unsupp_mods/
cpio inScape/
Useful variables setenv AVS_PATH/usr/avs/ set path = ($path $AVS_PATH/bin)
Executing AVS prompt% avs
Getting StartedAVS execution environment
Customization startup file Custom control over appearance, default directories, module libs Copy system startup file to home directory
cp $AVS_PATH/runtime/avsrc $HOME/.avsrc
Some example settingsNetworkWindow 960x960+290+30
DataDirectory $HOME/myData
NetworkDirectory $HOME/myNetworks
ModuleLibraries $AVS_PATH/avs_library/Volume \
$AVS_PATH/avs_library/UCD \
$AVS_PATH/unsupp_mods \
$HOME/myModules
Wrap up Questions, comments
Workshop hand-outs
Relevant web links http://www.avs.com - Advanced Visual Systems http://www.iavsc.org - International AVS Centre http://www.ncsa.uiuc.edu/SCD/Vis/Software/AVS/AVSdocs.html