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√3-subdivision

Published: 01 July 2000 Publication History
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  • Abstract

    A new stationary subdivision scheme is presented which performs slower topological refinement than the usual dyadic split operation. The number of triangles increases in every step by a factor of 3 instead of 4. Applying the subdivision operator twice causes a uniform refinement with tri-section of every original edge (hence the name √3-subdivision) while two dyadic splits would quad-sect every original edge. Besides the finer gradation of the hierarchy levels, the new scheme has several important properties: The stencils for the subdivision rules have minimum size and maximum symmetry. The smoothness of the limit surface is C2 everywhere except for the extraordinary points where it is C1. The convergence analysis of the scheme is presented based on a new general technique which also applies to the analysis of other subdivision schemes. The new splitting operation enables locally adaptive refinement under built-in preservation of the mesh consistency without temporary crack-fixing between neighboring faces from different refinement levels. The size of the surrounding mesh area which is affected by selective refinement is smaller than for the dyadic split operation. We further present a simple extension of the new subdivision scheme which makes it applicable to meshes with boundary and allows us to generate sharp feature lines.

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    cover image ACM Conferences
    SIGGRAPH '00: Proceedings of the 27th annual conference on Computer graphics and interactive techniques
    July 2000
    547 pages
    ISBN:1581132085

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    ACM Press/Addison-Wesley Publishing Co.

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    Publication History

    Published: 01 July 2000

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    SIGGRAPH '00 Paper Acceptance Rate 59 of 304 submissions, 19%;
    Overall Acceptance Rate 1,822 of 8,601 submissions, 21%

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