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Jul 21, 2021 · By leveraging subdivision (Sub-D) modeling, you can streamline the idea or conceptual stage of design because you don’t have to set up all the sub-structure (curves, surfaces, etc.) necessary in parametric modeling. Both parametric modeling and subdivision modeling techniques are used to create the final models that will go into production.
For a simple parametric surface, the direct evaluation of the limit surface is also simple, but for more complicated subdivision surfaces of arbitrary topology, this is less the case. The lack of a clear understanding of the relationship between the limit surface and the cage has historically lead to many applications avoiding tessellation.
Subdivision modeling is a technique that designers use to create highly detailed, scalable models from simple mesh models. Using this technique, designers can produce organic-looking, realistic 3D models in less time and with more detail than other modeling methods. We take a closer look at just why subdivision surface modeling is so important.
- Dassault Systèmes
- Subdivision modeling is used to create organic-looking shapes from hard-edged polygonal models.
- Many professional designers and engineers choose to use 3D Sculptor, a powerful subdivision modeling tool from Dassault Systèmes. 3D Sculptor can b...
- Good, clean topology is important in solid modeling as it allows designers to work faster with 3D models.
A subdivision surface, like a parametric surface, is described by its control mesh of points. The surface itself can approximate or interpolate this control mesh while being piecewise smooth. But where polygonal surfaces require large numbers of data points to approximate being smooth, a subdivision surface is smooth - meaning that polygonal ...
Jul 5, 2018 · Sub-d surfaces generate a parametric surface with "infinite" quality that are easy to adjust (shifting holding edges, changing creasing,..), but this is what you pay with: polygons are subdivided everywhere, even where detail is not needed (this is not true for adaptive subdivision) most of the times the surface is not perfect:
Point Q(u,v) on any patch is defined by combining control points with polynomial blending functions: 3 u 2. u 1] 3 v [ = V v. 2. v 1] Where M is a matrix describing the blending functions for a parametric cubic curve (e.g., Bézier, B-spline, etc.) Watt Figure 6.28.
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Subdivision surface. In the field of 3D computer graphics, a subdivision surface (commonly shortened to SubD surface or Subsurf) is a curved surface represented by the specification of a coarser polygon mesh and produced by a recursive algorithmic method. The curved surface, the underlying inner mesh, [1] can be calculated from the coarse mesh ...
