![]() If you do any kind of aesthetic surface design, you want SubDs. It’s worth a watch, even if you’re not a Pro/E or Creo user, because it shows what can be done with SubD surfaces. While it’s likely that PTC is trying to encourage their Pro/E users to upgrade to Creo, the video really highlights the difference in modeling methodology using SubD surfaces versus NURBS surfaces. PTC has recently posted a video that compares using Freestyle SubD surfaces in Creo Parametric 2.0 with NURBS surfaces in Pro/E Wildfire 5.0: Creo Parametric is primarily composed of four different applications: Modelling, Welding, Casting and Simulate all of which share a common database. It’s not only included at no extra charge with the base program, it’s well-integrated with Creo’s parametric modeling capabilities, allowing you to create aesthetic surfaces with SubDs, and precise surfaces (for interfaces) with NURBS. ![]() The Freestyle extension in PTC’s Creo Parametric 2.0 program is one of the most interesting SubD surface modelers. Major topics include part and assembly creation, and creation of. The tutorial covers the major concepts and frequently used commands required to advance from a novice to an intermediate user level. And the process of creating and editing SubD surfaces is quite a bit different too. Creo Parametric 9.0 Tutorial - Roger Toogood The eleven lessons in this tutorial introduce you to the design capabilities of Creo Parametric 9.0. SubD surfaces, though based on the same mathematical underpinnings as NURBS, are quite a bit different. Most, however, don’t use NURBS-they use subdivision (SubD) surfaces. There are a number of interesting tools available for doing organic shape modeling. While you could certainly find a way to model this shape with NURBS, and even get the nice G2 continuity shown here, it would definitely fall into the “pain in the neck” category: There is no standard definition for what an “organic shape” is. Probably the best definition, in the context of CAD, is that it’s a shape that’s a real pain in the neck to model using traditional methods with NURBS surfaces.
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