Daniels, JoelSilva, Claudio T.Cohen, Elaine2015-02-232015-02-2320091467-8659https://doi.org/10.1111/j.1467-8659.2009.01520.xIn this paper we introduce a coarsening algorithm for quadrilateral meshes that generates quality, quad-only connectivity during level-of-coarsening creation. A novel aspect of this work is development and implementation of a localized adaptation of the polychord collapse operator to better control and preserve important surface components. We describe a novel weighting scheme for automatic deletion selection that considers surface attributes, as well as localized queue updates that allow for improved data structures and computational performance opportunities over previous techniques. Additionally, this work supports optional and intuitive user controls for tailored simplification results.10.1111/j.1467-8659.2009.01520.x1437-1444