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Implementation Note 2: Approximating a Smooth Three-Dimensional Function on a Coarse Lattice

Luxen, Dennis
arXiv (All) · Papers
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graphicsmathematical-software
A smooth 3D function can be efficiently and accurately approximated by a 3D lookup table of significantly lower resolution combined with tetrahedral interpolation. The function is sampled once on a coarse grid in a preprocessing step. For each input, the enclosing grid cube is located, one of the 6
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