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. Baghera View PDE 2005, Atlanta 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

3. Baghera View PDE 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

4. Baghera View PDE 2005, Atlanta 4 Demonstration

5. Baghera View PDE 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

6. Baghera View PDE 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)

7. Baghera View PDE 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

8. Baghera View PDE 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

9. Baghera View PDE 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

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

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

12. Baghera View PDE 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

13. Baghera View PDE 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 ?

14. Baghera View PDE 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