Real-Time Deformation of Subdivision Surfaces from Object Collisions

Henry Schafer, Benjamin Keinert, Matthias Niessner, Christoph Buchenau, Michael Guthe, Marc Stamminger
University of Erlangen-Nuremberg
High Performance Graphics, pp. 1-8, 2014


   title={Real-Time Deformation of Subdivision Surfaces from Object Collisions},

   author={Sch{"a}fer, Henry and Keinert, Benjamin and Nie{ss}ner, Matthias and Buchenau, Christoph and Guthe, Michael and Stamminger, Marc},

   booktitle={Proceedings of the 6th High-Performance Graphics Conference},




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We present a novel real-time approach for fine-scale surface deformations resulting from collisions. Deformations are represented by a high-resolution displacement function. When two objects collide, these offsets are updated directly on the GPU based on a dynamically generated binary voxelization of the overlap region. Consequently, we can handle collisions with arbitrary animated geometry. Our approach runs entirely on the GPU, avoiding costly CPU-GPU memory transfer and exploiting the GPU’s computational power. Surfaces are rendered with the hardware tessellation unit, allowing for adaptively-rendered, high-frequency surface detail. Ultimately, our algorithm enables fine-scale surface deformations from geometry impact with very little computational overhead, running well below a millisecond even in complex scenes. As our results demonstrate, our approach is ideally suited to many real-time applications such as video games and authoring tools.
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