Introduction of CAD Kernels

1
Introduction of CAD Kernels

• iCAD Lab. M.E. KAIST
• Hyokwang Lee
• adpc9_at_icad.kaist.ac.kr

2
CAD Applications
Dassult Systems / Catia V5
3
CAD Applications
Autodesk / AutoCAD
Parametric Tech. Corp. / Pro/ENGINEER
4
CAD Applications
SDRC / I-DEAS gt EDS
SolidWorks Corp. / SolidWorks gt Dassult Systems
5
CAD Applications
UGS / Unigrahics NX4 gt EDS
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Company and CAD

• Dassult Systems (lt- SolidWorks Corp.)
• Catia V5
• Solidworks
• EDS PLM(lt- UGS, SDRC)
• UG NX
• I-DEAS NX
• PTC
• Pro/ENGINEER
• Autodesk
• AutoCAD MDT(Mechanical DeskTop)

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CAD Kernels

• Modeling Kernel
• The brains of the CAD applications
• a collection of (computer langage) classes and
  components that are comprised of mathmatical
  functions that perform specific modeling tasks
• CAD aplication interfaces to the kernel's
  functions throught the application's user
  interface

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CAD Kernels
DI Direct Interface
9
CAD Kernels

• ACIS
• Spatial Corp. -gt Dassult-Spatial
• Parasolids
• UGS -gt EDS PLM
• OpenCASCADE
• Open source
• CAS.CADE (Computer Aided Software for Computer
  Aided Design and Engineering), created by Matra
  Datavision in 1993
• published CAS.CADE in open source on the Internet
  as Open CASCADE in 1999.

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CAD Kernels
Doesnt consider incorporation(merge) among CAD
Companies ! You can refer to some imortant
history on the next slide.
11
Some History on the CAD Companies

• SDRC / I-DEAS (-gt EDS)
• 1982 SDRC releases I-DEAS
• 1995 Ford Motor Company selects I-DEAS as its
  corporate standard.
• 2001 EDS acquires SDRC.
• UGS / Unigraphics (-gt EDS)
• 1991 MDME/Unigraphics was acquired by EDS
  (Electronic Data Systems Corp.)
• 1997 EDS sets up its Unigraphics division as a
  wholly-owned subsidiary called Unigraphics
  Solutions.
• 2001 Unigraphics Solutions changes its name to
  UGS.
• Dassult Systems (lt- SolidWorks/SolidWorks,
  Spatial/ACIS)
• 1997 SolidWorks acquisition
• 1998 Acquisition of Matra Datavision(OpenCADCADE)
  development laboratory
• 2000 Acquisition of the 3D component division of
  Spatial

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CAD Systems Kernels
13
CAD Kernels
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ACIS with Scheme
- A3DT\bin\nt_net_dll\acis3dt.exe
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ACIS Scheme Example Prism

• - prism.scm

(partclear) (map viewdelete (partviews)) (vie
wdl 0 0 400 400) (viewgl 400 0 400 400) (map
iso (partviews)) (define p1 (position -10 -5
0)) (define p2 (position 10 -5 0)) (define p3
(position 0 10 0)) (define e1 (edgelinear p1
p2)) (define e2 (edgelinear p2 p3)) (define e3
(edgelinear p3 p1)) (define w (wire-body (list
e1 e2 e3))) (sweeplaw w (gvector 0 0 10)) (map
zoom-all (partviews))
Initialization
View creation
p3(0,10,0)
e2
e3
POINT creation
p1(-10,-5,0)
p2(10,-5,0)
e1
EDGE creation
WIRE
SWEEP
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ACIS Scheme Example Prism
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References

• http//www.dassult.com/
• http//www.solidworks.com/
• http//www.spatial.com/
• http//www.eds.com/
• http//www.ugs.com/
• http//www.solidworks.com/
• http//www.ptc.com/
• http//www.autodesk.com/
• http//www.opencascade.org/