Multifarious hierarchies of mechanical models for artist assigned levels-of-detail

Richard Malgat, Benjamin Gilles, David I. W. Levin, Matthieu Nesme, François Faure
2015 Proceedings of the 14th ACM SIGGRAPH / Eurographics Symposium on Computer Animation - SCA '15  
a) Coarse framebased simulation (b) Fine FEM simulation (c) Mixing a coarse frame-based simulation to a local FEM patch with our method Figure 1 : Using a hook to catch a coarsely discretized frame-based octopus is challenging due to the lack of deformation at the contact point (1a). One could resolve this problem with a high-resolution set of finite elements (1b) but, at the expense of runtime performance and with the introduction of spurious secondary motion. Multifarious Hierarchies of
more » ... ical Models allow an artist to add arbitrarily located detail simulations to the underlying coarse deformation models in order to produce the desired result. (1c). Abstract We present a new framework for artist driven level of detail in solid simulations. Simulated objects are simultaneously embedded in several, separately designed deformation models with their own independent degrees of freedom. The models are ordered to apply their deformations hierarchically, and we enforce the uniqueness of the dynamics solutions using a novel kinetic filtering operator designed to ensure that each child only adds detail motion to its parent without introducing redundancies. This new approach allows artists to easily add fine-scale details without introducing unnecessary degrees-of-freedom to the simulation or resorting to complex geometric operations like anisotropic volume meshing. We illustrate the utility of our approach with several detail enriched simulation examples.
doi:10.1145/2786784.2786800 dblp:conf/sca/MalgatGLNF15 fatcat:vcgw6tpfsvhvhlemiw3af3hce4