67 lines
2.6 KiB
C++
67 lines
2.6 KiB
C++
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/*+
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ARES/HADES/BORG Package -- ./libLSS/tools/powerspectrum/measure.hpp
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Copyright (C) 2014-2020 Guilhem Lavaux <guilhem.lavaux@iap.fr>
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Copyright (C) 2009-2020 Jens Jasche <jens.jasche@fysik.su.se>
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Additional contributions from:
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Guilhem Lavaux <guilhem.lavaux@iap.fr> (2023)
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+*/
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#ifndef __LIBLSS_POWERSPECTRUM_MEASURE_HPP
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#define __LIBLSS_POWERSPECTRUM_MEASURE_HPP
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#include <CosmoTool/algo.hpp>
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#include <CosmoTool/hdf5_array.hpp>
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#include "libLSS/samplers/core/types_samplers.hpp"
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#include "libLSS/samplers/core/powerspec_tools.hpp"
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namespace LibLSS {
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namespace PowerSpectrum {
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template<typename CArray>
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void computePower(ArrayType1d::ArrayType& power, const CArray& density, const IArrayType& a_keys,
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const IArrayType& a_adjust, const IArrayType1d& a_nmode, double volume, bool clear = true) {
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using CosmoTool::square;
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const IArrayType::ArrayType& keys = *a_keys.array;
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const IArrayType::ArrayType& adjust = *a_adjust.array;
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const IArrayType1d::ArrayType& nmode = *a_nmode.array;
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int begin0 = density.index_bases()[0];
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int begin1 = density.index_bases()[1];
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int begin2 = density.index_bases()[2];
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int end0 = density.index_bases()[0] + density.shape()[0];
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int end1 = density.index_bases()[1] + density.shape()[1];
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int end2 = density.index_bases()[2] + density.shape()[2];
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if (clear)
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std::fill(power.begin(), power.end(), 0);
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for (int i = begin0; i < end0; i++) {
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for (int j = begin1; j < end1; j++) {
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for (int k = begin2; k < end2; k++) {
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double P = square(density[i][j][k].real()) + square(density[i][j][k].imag());
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power[ keys[i][j][k] ] += P * adjust[i][j][k];
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}
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}
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}
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for (int i = 0; i < power.num_elements(); i++)
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if (nmode[i] != 0)
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power[i] /= (volume * nmode[i]);
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}
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template<typename F, typename CArray>
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void savePower(F& f, const std::string& n, const CArray& density, const IArrayType& a_keys,
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const IArrayType& a_adjust, const IArrayType1d& a_nmode, double volume) {
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ArrayType1d::ArrayType P(boost::extents[a_nmode.array->num_elements()]);
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computePower(P, density, a_keys, a_adjust, a_nmode, volume);
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CosmoTool::hdf5_write_array(f, n, P);
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}
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}
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};
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#endif
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