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		<citationkey>RodriguesStol:2015:FlGeMe</citationkey>
		<title>ECLeS: A Flexible and General Method for Local Editing of Parameters with Linear Constraints</title>
		<format>On-line</format>
		<year>2015</year>
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		<author>Rodrigues, Elisa de Cássia Silva,</author>
		<author>Stolfi, Jorge,</author>
		<affiliation>Universidade Estadual de Campinas (UNICAMP)</affiliation>
		<affiliation>Universidade Estadual de Campinas (UNICAMP)</affiliation>
		<editor>Rios, Ricardo Araujo,</editor>
		<editor>Paiva, Afonso,</editor>
		<e-mailaddress>erodrigues@ic.unicamp.br</e-mailaddress>
		<conferencename>Conference on Graphics, Patterns and Images, 28 (SIBGRAPI)</conferencename>
		<conferencelocation>Salvador, BA, Brazil</conferencelocation>
		<date>26-29 Aug. 2015</date>
		<publisher>Sociedade Brasileira de Computação</publisher>
		<publisheraddress>Porto Alegre</publisheraddress>
		<booktitle>Proceedings</booktitle>
		<tertiarytype>Work in Progress</tertiarytype>
		<transferableflag>1</transferableflag>
		<keywords>parameter editing, linear constraints, exact integer arithmetic, deformations.</keywords>
		<abstract>We describe ECLeS, a general method for interactive editing of objects that are defined by a list of parameters subject to linear or affine constraints. In this method, the constraints and the user editing actions are combined using weighted and constrained least squares instead of the usual finite element approach. We use exact integer arithmetic in order to detect and eliminate redundancies in the set of constraints and to avoid failures due to rounding. We are using this technique for the user-friendly editing of C1-continuous deformations of the plane, defined by splines of degree 5 on an arbitrary triangular mesh.</abstract>
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