Function exafmm_t::generate_surf2conv_up¶
Defined in File geometry.h
Function Documentation¶
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std::vector<int> exafmm_t::generate_surf2conv_up(int p)¶
Generate the mapping from surface points to convolution grid used in FFT.
- Parameters
p – Order of expansion.
- Returns
A mapping from upward equivalent surface point index to convolution grid index.