High Order Tessellation of a NURBS-based CAD Model for Subdivision-based Modelling

Description

Subdivision surfaces have been widely studied in recent years and some of the schemes have been implemented in several commercial systems for the entertainment and the computer aided design and manufacturing (CAD/CAM) industries. This project develops efficient and robust algorithms for model conversion between non-uniform rational B-splines (NURBS), the de facto standard for today’s graphics and CAD industries and subdivision surfaces. The emphasis will be on high order tessellation of a NURBS-based CAD model for subdivision-based modelling. Contrast to traditional model tessellation resulting in a planar approximation, this project develops methods that produce adaptively tessellated high order surface patches and are eventually represented as a single subdivision surface. An indirect approach through spline surface reparametrization and a direct approach through adaptive topological modelling will be developed. Major project outcomes include new methodologies, algorithms and processing tools for model conversion, subdivision-based modelling and their industrial applications. The project will thus provide further advancement and support to the next generation CAD/CAM systems.