tag:blogger.com,1999:blog-3285677929777490656.post8922627571101524703..comments2023-10-31T13:16:01.375+03:00Comments on Open CASCADE notes: Data model highlights – Parasolid, ACIS, Open CASCADERoman Lyginhttp://www.blogger.com/profile/18338419158437898791noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3285677929777490656.post-3866204216365962272011-07-09T16:51:01.090+04:002011-07-09T16:51:01.090+04:00hi,
you said
"An original surface normal is d...hi,<br />you said<br />"An original surface normal is defined by cross-product of U and V derivatives, and can be confirmed or reversed by that boolean flag."<br /><br />u and v in geom_surface is real numbers,<br />how can i get their derivatives?<br /><br />as i remember from calculus 2, u and v should be functions of lines, am i wrong, but they are represented as reals in geom_surface?<br /><br />as you can see i am a bit confused could you advise something?<br />thanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3285677929777490656.post-30272507418166613392010-11-08T10:49:30.172+03:002010-11-08T10:49:30.172+03:00Hi jazzros,
There is some public description of th...Hi jazzros,<br />There is some public description of the Parasolid-XT format. Just Google for it. However, as usual, the devil is in details. There are about 80+ schema files defining the format from v0.15 to v22; various configurations of how entities can really be encoded (e.g. cliff blended_edge defining a rolling ball surface), etc. It is only possible through intensive and deep testing (there are currently 1000+ test X_T files in the database). Again, the approach that pays off from day 1 is to have a full unit testing framework - create a test before you write a code.Roman Lyginhttps://www.blogger.com/profile/18338419158437898791noreply@blogger.comtag:blogger.com,1999:blog-3285677929777490656.post-48050199103490251842010-11-04T11:34:27.794+03:002010-11-04T11:34:27.794+03:00Hi Roman.
I've long been following for your wo...Hi Roman.<br />I've long been following for your work.<br />I am sure you have amazing results.<br />I remember that you start playing with ACIS-SAT, approximately at the same time when I.<br />Now I see that you already "tamed" X_T.<br />Could you please to help me - where you get info about Parasolid-X_T specification?<br /><br />Thanks.jazzroshttps://www.blogger.com/profile/06791385821946447577noreply@blogger.com