This paper presents a numerical coarsening method for corotational elasticity, which enables interactive large deformation of high-resolution heterogeneous objects. Our method derives a coarse elastic model from a high-resolution discretization of corotational elasticity with high-resolution boundary conditions. This is in contrast to previous coarsening methods, which derive a coarse elastic model from an unconstrained high-resolution discretization of regular linear elasticity, and then apply corotational computations directly on the coarse setting. We show that previous approaches fail to handle high-resolution boundary conditions correctly, suffering accuracy and robustness problems. Our method, on the other hand, supports efficiently accurate high-resolution boundary conditions, which are fundamental for rich interaction with high-resolution heterogeneous models. We demonstrate the potential of our method for interactive deformation of complex medical imaging data sets.

@Article\{TREO16,
  author       = "Torres, Rosell and Rodríguez, Alejandro and Espadero, José Miguel and Otaduy, Miguel A.",
  title        = "High-Resolution Interaction with Corotational Coarsening Models",
  journal      = "ACM Trans. on Graphics (Proc. of ACM SIGGRAPH Asia)",
  number       = "6",
  volume       = "35",
  year         = "2016",
  url          = "http://gmrv.es/Publications/2016/TREO16"
}