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Algorithm 999: Computation of Multi-Degree B-Splines

Published: 09 December 2019 Publication History

Abstract

Multi-degree splines are smooth piecewise-polynomial functions where the pieces can have different degrees. We describe a simple algorithmic construction of a set of basis functions for the space of multi-degree splines with similar properties to standard B-splines. These basis functions are called multi-degree B-splines (or MDB-splines). The construction relies on an extraction operator that represents all MDB-splines as linear combinations of local B-splines of different degrees. This enables the use of existing efficient algorithms for B-spline evaluations and refinements in the context of multi-degree splines. A MATLAB implementation is provided to illustrate the computation and use of MDB-splines.

Supplementary Material

ZIP File (999.zip)
Software for Computation of Multi-Degree B-Splines

References

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  1. Algorithm 999: Computation of Multi-Degree B-Splines

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    Published In

    cover image ACM Transactions on Mathematical Software
    ACM Transactions on Mathematical Software  Volume 45, Issue 4
    December 2019
    207 pages
    ISSN:0098-3500
    EISSN:1557-7295
    DOI:10.1145/3375544
    Issue’s Table of Contents
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Association for Computing Machinery

    New York, NY, United States

    Publication History

    Published: 09 December 2019
    Accepted: 01 March 2019
    Revised: 01 December 2018
    Received: 01 January 2018
    Published in TOMS Volume 45, Issue 4

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    Author Tags

    1. B-splines
    2. Extraction operator
    3. MDB-splines
    4. Multi-degree splines

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    • Ministero dellðIstruzione, dellðUniversità e della Ricerca
    • Università degli Studi di Roma Tor Vergata

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    Cited By

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    • (2023)Generalized de Boor–Cox Formulas and Pyramids for Multi-Degree Spline Basis FunctionsMathematics10.3390/math1102036711:2(367)Online publication date: 10-Jan-2023
    • (2023)Outlier-free spline spaces for isogeometric discretizations of biharmonic and polyharmonic eigenvalue problemsComputer Methods in Applied Mechanics and Engineering10.1016/j.cma.2023.116314417(116314)Online publication date: Dec-2023
    • (2023) Almost- splines: Biquadratic splines on unstructured quadrilateral meshes and their application to fourth order problems Computer Methods in Applied Mechanics and Engineering10.1016/j.cma.2022.115640403(115640)Online publication date: Jan-2023
    • (2023)Extraction and application of super-smooth cubic B-splines over triangulationsComputer Aided Geometric Design10.1016/j.cagd.2023.102194103(102194)Online publication date: Jun-2023
    • (2023)An Efficient Algorithm for Degree Reduction of MD-SplinesAdvances in Computer Graphics10.1007/978-3-031-50078-7_1(3-14)Online publication date: 28-Aug-2023
    • (2022)Algorithm 1020: Computation of Multi-Degree Tchebycheffian B-SplinesACM Transactions on Mathematical Software10.1145/347868648:1(1-31)Online publication date: 16-Feb-2022
    • (2022)U-splines: Splines over unstructured meshesComputer Methods in Applied Mechanics and Engineering10.1016/j.cma.2022.115515401(115515)Online publication date: Nov-2022
    • (2022)Application of optimal spline subspaces for the removal of spurious outliers in isogeometric discretizationsComputer Methods in Applied Mechanics and Engineering10.1016/j.cma.2021.114260389(114260)Online publication date: Feb-2022
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