WIRED

1

• WIRED
• World-Wide Web Interactive Remote Event Display
• Mark Dönszelmann, IT/API, CERN
• CHEP 2000, 9 February 2000, Padova, Italy

2
Features

• Framework for building Event Displays
• 10 of code is experiment specific
• Client Server Architecture
• Client can be used as Application or Applet
  (browser mode)
• Written entirely in Java
• Client in Java, Server can be in a different
  language
• Access to data
• reads files or connects to Java, FORTRAN, C and
  C
• Graphics Engine to do HEP specific projections
• 3D as well as non-linear (fish-eye) projections
• ATLAS, BaBar, CHORUS, DELPHI and LHCb
• Development infrastructure available for
  collaboration

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WIRED as Application (Delphi)
4
WIRED as Applet in Netscape (BaBar)
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Client-Server Architecture
WIRED Application
WIRED Server
Geometry and Events
Geometry and Events
WIRED Code
WIRED Gateway
WWW Browser
WIRED Applet
WWWServer
WIRED Code
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Plug-in Architecture
ApplicationorApplet
EventLoader
GUI Draw
Cache
WIRED
GeometryLoader
Representables
Represent
Project
Representations
Projections
Projectables
Drawables
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GUI (Views and Controls)
MenuBar
ToolBar
ViewTop
ControlTop
Console
8
Event Visibility Tree
9
Infobus to connect Views to Controls
Comm. Status
Event Selector
Event Info
Command
Info Bus
Views
Parts Select
Info Bus
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Merge Controller
Bus
Merge Controller
Control 1
unknown
View 1 5003
View 2 5003
View 3 5007
View 4 5003
View 5 5007
Control 2
Merge Controller
5007
Select Bus
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Graphics Engine - Special Projections
Parallel Projectionbased on a matrix calculation
X-Fish Eye Projectionbased on functions
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WIRED Graphics Engine versus 3D
Scaling using a 3D Graphics Engine
All drawables based on volume
Scaling using theWIRED Graphics Engine
All drawables based on fixed sized symbols
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Rendering Pipe
Store
Canvas
Pipe
Representation
EventCache
Projection
Hits, Tracks, ...
2D Symbols in 3D
2D Symbols in 2D
3D Transformationto 2D
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Cascaded Projections
Single Projectionat draw time W is discarded
Cascaded ProjectionU,V,W output is X,Y,Z
input at draw time final W value is discarded
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Layering
Layering System
Result
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Access to Data

• XML
• File access (direct or over web server)
• Easiest way to get data in WIRED, but also slow
• Relatively large files, but compression factor is
  high
• Use for fixed geometry (DTD is available)
• No interaction possible
• ATLAS, DELPHI, LHCb
• RMI
• Copy of objects is possible (e.g. full event
  object structure)
• Server is in Java
• CHORUS (to FORTRAN via C)
• CORBA
• Copy of structures is possible
• Server can be in C or Java
• BaBar (to C)

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WIRED as JAS Plug-In

• Access to Data
• Access to/from GUI
• Selection of single events
• Selection of tracks and hits
• Connection to Infobus
• Display of status information
• Collaboration with Tony Johnson is ongoing...

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Libraries and Tools (3rd party)

• Jikes (compiler)
• Swing (gui)
• Aelfred and xml4j (XML parsers)
• JavaMail (bug reporting)
• BeanShell (java scripting engine)
• Infobus (software bus)
• JavaHelp (help system)
• JUnit (unit testing framework)
• ORBacus (CORBA)
• Log4j (logging facility)

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Infrastructure for development

• Unix and NT support for development
• AFS to access repository --gt migrate to CVS
  server
• CVS repository and CVSWeb
• GNUMake
• Nightly build and test on different platforms
• JIndent for coding convention
• JInstall Toolkit to create distribution

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Summary

• Now
• Graphics Engine, including picking, reasonably
  complete
• Printing in PostScript
• Easy event selection
• Access to Data in XML, RMI and CORBA
• Near Future
• Integration - Coupling to JAS
• Further Infobus integration
• Additional Controls
• Addition of the scripting engine
• Configuration saving and restoring (in XML)
• HepRep implementation
• Access to C objects directly (without CORBA)

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Authors (including students)

• Andrea Ballaminut, University of Udine, Italy
• Cristian Colonello, University of Udine, Italy
• Mark Dönszelmann, CERN
• Eric van Herwijnen, CERN
• Dies Köper, NIKHEF, Amsterdam, The Netherlands
• Jari Korhonen, University of Oulu, Finland
• Maarten Litmaath, Fermilab, U.S.A.
• Joseph Perl, SLAC, U.S.A.
• Anna Theodorou, CERN
• Daniel Whiteson, CERN
• Eberhard Wolff, CERN