Savita Dawar savitacad'delhi'nic'in

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CollabCAD Software based on Open Source Software
Open Standards

Savita Dawar savita_at_cad.delhi.nic.in CAD Group,
National Informatics Centre, Ministry Of
Communication Information Technology, A-Block,
C.G.O. Complex, Lodhi Road, New Delhi 110003,
India Tel [phone] Fax
91-11-4392225 http//www.collabcad.com
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• CollabCAD Software is based on Open Standards and
  Open Source Software
• CollabCAD is a Java based distributed 2D 3D
  CAD/CAM Software
• Developed by Computer Aided Design Group of
  National Informatics Centre, the IT Support
  professionals from India.
• LINUX is the Development Platform.

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• Emphasis has been to base it on open source
  software and free software such as
• OpenCASCADE the geometric kernel from Matra
  Datavision (www.opencascade.com)
• Java, Java3D SUN Microsystems
  (www.java.sun.com)
• Linux 6.2 - RedHat Linux 6.2 (www.redhat.com)

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• Ptolemy Plot from UC, Berkeley
  (www.ptolemy.eecs.berkeley.edu)
• JPython/Jacl for Client-side Scripting to achieve
  interapplication operability (www.jython.org)
• WilmaScope Java3D Graph Structure Visualisation
  program (www.wilmascope.org)

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• Cassowary Incremental constraint solving
  toolkit for linear equalities and inequalities
  (www.cs.washington.edu/research/constraints/cassow
  ary)
• Java Speech API Jesse Peterson, Text-to-speech
  synthesizer (www.jpeterson.com/rnd/ )

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Use of Open Source Software has helped CollabCAD
to provide a cost-effective CAD solution!
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• CollabCAD 1.5

• Based on a 3-tier distributed computing
  architecture
• Available on Linux, Windows Solaris

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• CollabCAD 1.5 features
• Design Drafting
• Surface Solid Modeling
• Basic NC features
• Collaborative Design
• Client side Scripting ( JPython, Jacl)

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Some Models created in CollabCAD
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• CollabCAD 1.5 features
• Re-Engineering
• Surface re-construction
• The next 3 slides show the body of an aircraft
  reconstructed from a point cloud in CollabCAD

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An aircraft reconstructed from point cloud in
CollabCAD
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Next 2 slides show A model created using the
2D-Sketcher of CollabCAD
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• CollabCAD is collaborative in nature
• It enables multiple designers to work across the
  network
• Access to Audio Video conferencing
• Access to the same design concurrently
• Modify the designs

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• CollabCAD supports standards based data exchange
  formats
• IGES, STEP, VRML and STL formats
• STEP AP 214 203 are supported

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STEP file generated in CollabCAD
ISO-10303-21HEADER FILE_DESCRIPTION(('Model')
,'1') FILE_NAME('Euclid Shape
Model','2002-03-22T151537',('Author'),(
'MATRA-DATAVISION'),'CASCADE STEP processor
V4.0', 'MATRA-DATAVISION CASCADE OL
4.0','Unknown') FILE_SCHEMA(('AUTOMOTIVE_DESIGN_
CC2 1 2 10303 214 -1 1 5 4 '))ENDSECDATA
1 APPLICATION_PROTOCOL_DEFINITION('committee
draft', 'automotive_design',1997,2)2
APPLICATION_CONTEXT( 'core data for automotive
mechanical design processes')3
SHAPE_DEFINITION_REPRESENTATION(4,10)4
PRODUCT_DEFINITION_SHAPE('','',5)5
PRODUCT_DEFINITION('design','',6,9)6
PRODUCT_DEFINITION_FORMATION('','',7)7
PRODUCT('Product 1','Product 1','',(8))
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• STEP XML
• ST-XML A programming tool from
  STEPTools,Inc(www.steptools.com) has been used
• converts STEP data to STEP XML and business
  object data
• Uses OSEB Binding Support
• XML bindings defined by Part 28 of the STEP ISO
  10303 standard

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STEP/XML file(using ST-XML from STEPTools) lt?xml
version"1.0"?gt ltiso_10303_28 representation_categ
ory"OSEB"gt ltiso_10303_28_headergt
ltdocument_namegtEuclid Shape Modellt/document_namegt
lttime_stampgt2001-10-31T1536310500lt/time_sta
mpgt ltauthorgtAuthor Namelt/authorgt ltoriginating_orga
nizationgt MATRA-DATAVISION lt/originating_organizat
iongt ltauthorizationgtAuthorisation
statuslt/authorizationgt ltoriginating_systemgtMATRA
-DATAVISION CASCADE OL 3.0lt/originating_systemgt
ltpreprocessor_versiongtCASCADE STEP processor
V3.0lt/preprocessor_versiongt lt/iso_10303_28_headergt
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ltexpress_data id"express" representation_category
"OSEB"gt ltosbuos xmlns"urniso10303-28oseb/conf
ig_control_design" xmlnsedo"urniso103
03-28oseb/Edo" xmlnsosb"urniso10303-
28oseb" modelname"Euclid Shape
Model" schema"config_control_design"
unset"NULL" c"i3 i1 " gt ltUncertainty_measure_w
ith_unit x-id"i29" Value_component-r"id1"
Unit_component-r"i26" Name"distance_accuracy_val
ue" Description"confusion accuracy"/gt ltLength_mea
sure x-id"id1" val"1E-007"/gt ltSi_unitSolid_angle
_unit x-id"i28" Name"steradian"/gt ltPlane_angle_u
nitSi_unit x-id"i27" Name"radian"/gt ltLength_unit
Si_unit x-id"i26" Prefix"milli" Name"metre"/gt
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CollabCAD can be considered as the geometry
workbench and be used for a total CIM solution
using a Consortium Approach
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• Proposed Consortium Approach (1)
• Background Information
• Availability of CIM Specialized Solutions in
  isolation
• Need to pool the expertise in Educational
  Research Institutes and Industries

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• Proposed Consortium Approach (2)
• Original forecasts which turned out to be wrong
• Attempts to develop End-to-End CIM Solutions by a
  single Organization
• Vendor specified Data Standards
• Single Point Product Development

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• Proposed Consortium Approach (3)
• Original forecasts which turned out to be true
• Need for Collaborative Integrated Development
• International Data Standards

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• Proposed Consortium Approach (4)
• Realistic Approach to build a shared CIM Solution
• Geometry Base from CollabCAD (NIC)
• IGES, STEP, STL, VRML International Standard
  formats for sharing
• Distributed (Java, Java3D) and Collaborative
  Technology
• Based on Open Source Libraries (OpenCascade,
  Ozone, ..)

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• Proposed Consortium Approach (5)
• Integrating other Specialized Modules to get
  total CIM solution
• At first stage, sharing of geometry data static
  files
• Dynamic sharing of data in the next stage

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Proposed Consortium Approach (6)

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Proposed Consortium Approach (7)

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• Effects of Consortium Development
• Leads to the End-to-End CIM Solution for the
  Strategic Sectors
• Cost effective CIM Solution to other Sectors
  including Educational and Research Institutes
• A common framework for CIM Solution is getting
  developed and hence any organization can plug-in
  its specialized modules

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• Benefits of Consortium Development (1)
• Reduction in time-to-market
• Even a modest reduction in inventory may save
  billions of dollars in global market industries
• Going to market ahead of other competitors can be
  worth of gaining several millions of dollars to
  an industry.
• No loss in information of product data and hence
  highest quality is achieved

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• Benefits of Consortium Development(2)
• Better secured product data since different
  levels of authentication (designer,
  process-planer, industry-partner, contractor,
  customer etc), and permissions (view only, edit,
  etc) across global access
• The right people get the right data at the right
  time.
• Cost effective solutions

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• Benefits of Consortium Development(3)
• Fee-for-service over the net creates a new huge
  market for sharing human expertise to do very
  specialized/focused business.
• Tools are affordable even for small-scale
  industry, consultants etc because of
  fee-for-service model with software-on-demand
  tools

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Current Work in CollabCAD is in progress in the
following areas (1)

• Basic Tolerance, Constraint, Assembly
• Bill of Materials
• Styling
• Sketcher

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Current Work in CollabCAD is in progress in the
following areas (2)

• Feature Based Solid Modeling
• Web Enabling and Browser
• IGES and XML Based Geometry Workbench
• Basic facility for taking CAD Data into OPEN
  OFFICE through XML

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• Current Work in CollabCAD is in progress in the
  following areas (3)
• Improvements in Advanced Surface Handling
  Re-engineering, Solid Modeling, Scripting, Video
  Audio Conferencing

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• For further details contact
• Dr.B.K.Gairola bkg_at_hub.nic.in
• Dr. Savita Dawar savita_at_cad.delhi.nic.in
• Fax -91-11-439 2225