RE: [cgmo-webcgm-comment] Public Comment

[Kevin O'Kane <kevoka@AUTO-TROL.com>]

I do not know of an implementation that will create a CGM NURBS element. Our
product, Tech Illustrator, will generate NUBS, but not NURBS. 

Kevin O'Kane
Auto-trol Technology Corp.

-----Original Message-----
From: Cruikshank, David W [mailto:david.w.cruikshank@boeing.com]
Sent: Thursday, August 19, 2004 4:35 PM
To: kgordon@docsoft.com
Cc: cgmo-webcgm-comment@lists.oasis-open.org
Subject: RE: [cgmo-webcgm-comment] Public Comment


Actually NUBS and NURBS are prohibited in the WebCGM Profile, but will
likely be permitted in the next version of the WebCGM Profile.

They are permitted in the Air Transport Association (ATA) GREXCHANGE Profile
and we, at Boeing, do use NUBS extensively in our technical illustrations
and export them into CGM.  Most of the products focused on creation and
maintenance of technical illustrations use either NUBS or Polybeziers.  We
have yet to identify a requirement in the application of technical
illustrations for NURBS, but would be interested in hearing about one.

Let me know if I can provide any more information.

Thank You,

Dave Cruikshank
Technical Fellow - Graphics/Digital Data Interchange
Boeing Commercial Airplane
206.544.8876, fax 206.544.9590
david.w.cruikshank@boeing.com



-----Original Message-----
From: comment-form@oasis-open.org [mailto:comment-form@oasis-open.org]
Sent: Thursday, August 19, 2004 1:19 PM
To: cgmo-webcgm-comment@lists.oasis-open.org
Subject: [cgmo-webcgm-comment] Public Comment


Comment from: kgordon@docsoft.com

I have a question, I know i'll find some help here.  It regards non-uniform
rational b-splines.

The first sentence I hear out of every CGM proponents mouth is that SVG
can't replace CGM becuase SVG doesn't support NURBS.  Well I wanted to do
some testing and see how well they preformed. Well it's funny, i've been
trying to find a CGM with a NURB for quite some time now.  There isn't one
in any test suite available, NIST/ATA/Etc.  There was 1 cgm with a bspline,
but it wasn't a nurb, (it was element 24 'nub', rather than 25 'nurb')
Where would a person find a cgm with a NURB in it?