Recently, free-form deformation (FFD)-based simulation has received a lot of attention to achieve real-time animation
of complex objects, and many researches have improved the accuracy of modelling complex material property. Previously, a freeform
deformation axis aligned bounding box (FFD AABB) was proposed to approximate the FFD-embedded surfaces. Using
FFD AABB, an efficient update of bounding box is achieved with balancing between accuracy and computational cost. The
authors extended the FFD AABB with a more conservative collision handling method between FFD AABBs to deal with the
cases that the nodes on one side of FFD AABB are out-of-plane. In addition, the authors adopted a broad-phase culling
algorithm to cope efficiently with both self-collision and inter-collision using parallel spatial hashing.
S. Jung, M. Hong, and M. Choi, Collision Handling for Free-Form Deformation Embedded Surface IET Image Processing, Vol. 5, Iss. 4, pp.341-348, 2011.
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