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Baghera View

Baghera View A new generation of STEP based models viewer and synthesizer based on virtual reality and open source technologies PDE 2005 The 7th NASA-ESA Workshop on Product Data Exchange April 19-22, 2005 Atlanta, Georgia USA. Eric Lebègue - HANOP Jean-Luc Le Gal & Thierry Warrot - CNES

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Baghera View

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  1. Baghera View A new generation of STEP based models viewer and synthesizer based on virtual reality and open source technologies PDE 2005 The 7th NASA-ESA Workshop on Product Data Exchange April 19-22, 2005 Atlanta, Georgia USA Eric Lebègue - HANOP Jean-Luc Le Gal & Thierry Warrot - CNES Hans-Peter De Koning – ESA/ESTEC Souheil Soubra & Florent Coudret - CSTB

  2. Context : STEP standards available • STEP standards are now available and becoming stable for exchange and archiving of technical data for space engineering domain • AP203/214 : 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 Baghera ViewPDE 2005, Atlanta

  3. 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 Baghera ViewPDE 2005, Atlanta

  4. Demonstration Baghera ViewPDE 2005, Atlanta

  5. Current functions • Loading / superposing several STEP models into one 3D session • Browsing hierarchy, searching for elements • 3 rendering modes : wire frame, solid, transparency • Elements properties display • Generating reports Baghera ViewPDE 2005, Atlanta

  6. Technologies • STEP-TAS loading with PyEXPRESS/C++ library • Direct translation of STEP-TAS objects into OpenSG representation • AP203/214 loading with OpenCascade 5 • Report generation in Word/RTF format • Portable GUI with QT (Windows, UNIX, Linux, Mac) Baghera ViewPDE 2005, Atlanta

  7. Characteristics • Installation (STEP-TAS) : • ZIP < 20 MB • no particular graphic cards required • => easy to distribute • Intuitive GUI => no training • Performance : • Loading STEP-TAS METOP model (>17000 instances) in few seconds • Loading AP203 model little bit faster than Open Cascade standard viewer Baghera ViewPDE 2005, Atlanta

  8. Current status • Current version : 3.2.beta • Compliant with TASverter r2004-02-11 • See : http://www.estec.esa.int/thermal/tools/tasverter.html • Beta testing in progress with CNES, ESA, Astrium and Alcatel Space • First OP version • Planned : Autumn 2005 • Based on “frozen” STEP-TAS • CNES is willing a free distribution, at least in Europe • Contact : Thierry Warrot : thierry.warrot@cnes.fr Baghera ViewPDE 2005, Atlanta

  9. AP203 / 214 to STEP-TAS converter prototype • OpenCascade 5 for loading AP203/214 • PyEXPRESS/C++ for writing STEP-TAS • Compliant with TAS Verter • Generates triangles and hierarchy • Can be loaded into Baghera View 3.2 Baghera ViewPDE 2005, Atlanta

  10. Summary : A new Architecture Baghera View V3 STEP-TAS (EXPRESS) PyEXPRESS Generator STEP-TAS C++ Library Bibliothèques Open Cascade 5.2 STEP-TAS C++ Library AP203/214 -> STEP-TAS Converter (Prototype) STEP-TAS Files AP203/214 Files … STEP-TAS Python Library STEP-TAS Python Library STEP-TAS Python Library CATIA TAS-Verter ESARAD TAS-Verter THERMICA TAS-Verter CORATHERM ESARAD THERMICA CORATHERM Baghera ViewPDE 2005, Atlanta

  11. Development context : CSTB EVE PlatformCSTB, European Leader for Research in the Construction domain Building and civil engineering design Space earth observation Data acquisition and processing Mechanical design Standard Bus (STEP, IFC, OpenGIS, HDF/NetCDF…) EVE Platform Enriched Virtual Environments Simulation Modules Simulation Modules Light weight clients Immersion Space Baghera ViewPDE 2005, Atlanta

  12. Proposed extensions (1/2) • Comparison of models • For checking incremental exchanges • For collision detection • Using PyJex (University of Manchester) • Filtering of report generation • For getting more compact documents • Detailed STEP files analysis (rules checking…) • Required for files not generated by TAS Verter Baghera ViewPDE 2005, Atlanta

  13. Proposed extensions (2/2) • Upgrade to be compliant with future TAS Verters • Orbitography, kinematic, missions related data… • Extension and industrialisation of AP203/214 to STEP-TAS converter prototype • Semi-Automatic filtering • Shapes recognition • New loadings : • STEP-NRF (results of analysis, ESATAN…) • STEP-SPE (ESABASE…) • AP209 (sponsors are welcome) • Other ideas ? Baghera ViewPDE 2005, Atlanta

  14. Thank you for your attention • Contacts • HANOP • Eric.lebegue : eric.lebegue@hanop.net • CNES • Jean-Luc Le Gal : jean-luc.legal@cnes.fr • Thierry Warrot : Thierry.Warrot@cnes.fr • ESA/ESTEC • Hans-Peter De Koning : hans-peter.de.koning@esa.int • CSTB • Souheil Soubra : souheil.soubra@cstb.fr • Florent Coudret : florent.coudret@cstb.fr Baghera ViewPDE 2005, Atlanta

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