Improving GPU based Evaluation and Rendering of NURBS
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Optimized GPU evaluation of arbitrary degree NURBS curves and surfaces
This paper presents a new unified and optimized method for evaluating and displaying trimmed NURBS surfaces using the Graphics Processing Unit (GPU). Trimmed NURBS surfaces, the de facto standard in commercial mechanical CAD modeling packages, are currently being tessellated into triangles before being sent to the graphics card for display since there is no native hardware support for NURBS. Ot...
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Non-Uniform Rational B-Splines (NURBS) are widely used, especially in the design and manufacturing industry, for their precision and ability to represent complex shapes. These properties come at the cost of being computationally expensive for rendering. Many methods have tackled NURBS rendering by view based approximations and/or heavy preprocessing. We present a method for resolution independe...
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Trimmed NURBS are the standard surface representation used in CAD/CAM systems and accurate visualization of trimmed NURBS models at interactive frame rates is of great interest for industry. To support modification and/or animation of such surfaces, a GPU-based trimming and tessellation algorithm has been developed recently. First, the NURBS is approximated with a bi-cubic hierarchy of Bézier p...
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Graphics processing units (GPUs) have recently evolved into programmable parallel processors capable of performing general-purpose computational tasks. We present some algorithms that utilize GPUs to speed up traditional operations in design and manufacturing. One significant operation in Computer Aided Design (CAD) is the evaluation and rendering of trimmed NURBS surfaces. Another important pr...
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Non Uniform Rational B-splines (NURBs) are proved to be very promising for metamodeling in engineering problems, because they have unique properties such as local modification scheme, strong convex hull property, and infinitely differentiability, etc. Since NURBs are defined by control points, knot vector, and weights associated with control points, the precision of NURBs is influenced by all o...
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