منابع مشابه
Subdivision surfaces for CAD - an overview
Subdivision surfaces refer to a class of modelling schemes that define an object through recursive subdivision starting from an initial control mesh. Similar to B-splines, the final surface is defined by the vertices of the initial control mesh. These surfaces were initially conceived as an extension of splines in modelling objects with a control mesh of arbitrary topology. They exhibit a numbe...
متن کاملConversion of CAD Models to Loop Subdivision Surfaces
We propose a general framework for converting a CAD model, which is a collection of trimmed NURBS surfaces, to a single Loop subdivision surface. We first apply a Delaunay-based meshing method to generate a template mesh and a set of data points from the input model, and then fit a Loop subdivision surface using exact evaluation.
متن کاملTrimming for subdivision surfaces
Trimming is an important primitive operation in geometric modeling. It is also the root of many numerical and topological problems in modern NURBS based CAGD systems. In this paper we introduce a new method for trimming subdivision surfaces. It is based on the use of combined subdivision schemes to guarantee exact interpolation of trim curves. The latter ensures, for example, that if two surfac...
متن کاملSubdivision Surfaces
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متن کاملFast Intersections for Subdivision Surfaces
Subdivision surface intersections can be costly to compute. They require the intersection of high resolution meshes in order to obtain accurate results, which can lead to slow performance and high memory usage. In this paper we show how the strong convex hull property can lead to a method for efficiently computing intersections at high resolutions. Consequently, the method can be used with any ...
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ژورنال
عنوان ژورنال: Computer-Aided Design and Applications
سال: 2004
ISSN: 1686-4360
DOI: 10.1080/16864360.2004.10738262