New version of BAGHERA STEP viewer based on open standard technologies

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• New version of BAGHERA STEP viewer based on open
  standard technologies
• 6th NASA/ESA workshop on Product Data Exchange
• April, 21st, 2004
• EADS Astrium
• Friedrichshafen, Germany

Eric Lebègue (GRAITEC) Jean-Luc Le Gal (CNES)
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Context STEP standards available

• STEP standards are now available and becoming
  stable for exchange and archiving of technical
  data for space engineering domain
• AP203 for general CAD
• Available with CATIA and most of standard general
  CAD tools
• STEP-TAS radiative thermal analysis
• Industrial level available within main European
  radiative thermal tools, thanks to TAS-Verter
• ESARAD, THERMICA, CORATHERM

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Intermediate checking tool required

• Now, in data exchange phase, between engineers
  using different tools, it is important to propose
  a  common reference  checking viewer
• To be used by sender and receiver of the data,
  for
• Checking 3D geometry
• Checking assemblies and properties
• Reporting the exchanged data
• This is the goal of BAGHERA View

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New version of BAGHERA View based on Open
Standards

• To have the full capability and freedom to
  develop specific user requirements (specific
  displays, reporting)
• To be able to propose run-time free licence
• Choices
• STEP-TAS files reading ESA / PyExpress
• STEP-AP203 files reading Open Cascade V5
• 3D GUI Open GL / VTK

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Baghera View Architecture
Windows / Open GL / VTK 3D GUI
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STEP-TAS/NRF -gt PyEXPRESS -gt C API

• PyEXPRESS generation
• Complete Open Source code of new STEP-TAS/NRF C
  API, including STEP-21 write/read
• Validated on
• Windows NT4/2000
• Silicon Graphics /Irix 6
• SUN/Solaris 8

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STEP-TAS/NRF C API Example
ENTITY triangle SUBTYPE OF (primitive_bounded_surf
ace) p1 geometric_construction_point p2
geometric_construction_point p3
geometric_construction_point END_ENTITY
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GUI and reporting

• Standard Windows MFC for menus, properties, tree
  view
• Direct translation of STEP-TAS objects into
  OpenGL/VTK representation
• Triangularisation of STEP-AP203 objects thanks to
  OpenCascade V5 library and display with
  OpenGL/VTK
• Simple report generation in RTF/Word format

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Status Baghera View 3.1

• Development in progress
• Validation
• STEP-TAS files based on ESA tests suites,
  generated with TAS-Verter
• STEP AP203 based on CNES tests suites generated
  with CATIA
• Beta version expected before this summer

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Characteristics

• Installation (STEP-TAS)
• ZIP lt 4 MB
• unzip lt 15MB
• no particular graphic cards required
• gt easy to distribute
• Intuitive GUI gt no training
• Loading ISS model (4000 instances) in few seconds
  on a basic PC ! gt very efficient

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BAGHERA View Possible evolutions

• Integration of STEP-NRF and post-processing
  results display
• WEB integration (Active-X)
• Integration of EXPRESS rules checking
• Models evolutionmanagement
• Extension with orbitography, mobile spacecraft
  and missions related data
• Integration of STEP-SPE,AP209 ?
• Other ideas ?