System and method for defining t-spline and t-nurcc surfaces...

Details System and method for defining t-spline and t-nurcc surfaces... System and method for defining t-spline and t-nurcc surfaces...

G - Physics

06

T

G06T 17/00 (2006.01)

Patent

CA 2517463

A system and method is provided for defining a bi-cubic spline surface in a computing environment. One operation in the method is creating a control mesh with a substantially rectangular structure (150). A further operation is inferring from the control mesh the tensor product B-spline basis functions for each control point (152). The surface can then be computed based on the basis functions and the control mesh (154).

L'invention concerne un système et un procédé servant à définir une surface de spline bicubique dans un environnement informatique. Une étape de ce procédé consiste à créer un réseau de contrôle possédant une structure (150) pratiquement rectangulaire. L'étape suivante consiste à induire sur la base de ce réseau de contrôle les fonctions de base de B-spline de produits tensorielle pour chaque point de contrôle (152). Il est alors possible de calculer la surface d'après ces fonctions de base et ce réseau de contrôle (154).

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