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https://github.com/cosmo-sims/MUSIC.git
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126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
// This file is part of monofonIC (MUSIC2)
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// A software package to generate ICs for cosmological simulations
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// Copyright (C) 2024 by Oliver Hahn
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//
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// monofonIC is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// monofonIC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef __CONVOLUTION_KERNELS_HH
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#define __CONVOLUTION_KERNELS_HH
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#include <string>
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#include <map>
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#include "config_file.hh"
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#include "densities.hh"
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#include "density_grid.hh"
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#include "transfer_function.hh"
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#define ACC_RF(i, j, k) (((((size_t)(i) + nx) % nx) * ny + (((size_t)(j) + ny) % ny)) * 2 * (nz / 2 + 1) + (((size_t)(k) + nz) % nz))
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#define ACC_RC(i, j, k) (((((size_t)(i) + nxc) % nxc) * nyc + (((size_t)(j) + nyc) % nyc)) * 2 * (nzc / 2 + 1) + (((size_t)(k) + nzc) % nzc))
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namespace convolution
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{
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//! encapsulates all parameters required for transfer function convolution
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struct parameters
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{
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int nx, ny, nz;
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double lx, ly, lz; //,boxlength;
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config_file *pcf;
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transfer_function *ptf;
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unsigned coarse_fact;
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bool deconvolve;
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bool is_finest;
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bool smooth;
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};
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/////////////////////////////////////////////////////////////////
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//! abstract base class for a transfer function convolution kernel
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class kernel
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{
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public:
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//! all parameters (physical/numerical)
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parameters cparam_;
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config_file *pcf_;
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transfer_function *ptf_;
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refinement_hierarchy *prefh_;
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tf_type type_;
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//! constructor
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kernel(config_file &cf, transfer_function *ptf, refinement_hierarchy &refh, tf_type type)
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: pcf_(&cf), ptf_(ptf), prefh_(&refh), type_(type) //cparam_( cp )
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{
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}
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//! dummy constructor
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/*kernel( void )
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{ }*/
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//! compute/load the kernel
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virtual kernel *fetch_kernel(int ilevel, bool isolated = false) = 0;
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//! virtual destructor
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virtual ~kernel(){};
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//! purely virtual method to obtain a pointer to the underlying data
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virtual void *get_ptr() = 0;
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//! purely virtual method to determine whether the kernel is k-sampled or not
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virtual bool is_ksampled() = 0;
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//! purely virtual vectorized method to compute the kernel value if is_ksampled
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virtual void at_k(size_t len, const double *in_k, double *out_Tk) = 0;
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//! free memory
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virtual void deallocate() = 0;
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};
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//! abstract factory class to create convolution kernels
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struct kernel_creator
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{
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//! creates a convolution kernel object
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virtual kernel *create(config_file &cf, transfer_function *ptf, refinement_hierarchy &refh, tf_type type) const = 0;
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//! destructor
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virtual ~kernel_creator() {}
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};
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//! access map to the various kernel classes through the factory
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std::map<std::string, kernel_creator *> &get_kernel_map();
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//! actual implementation of the factory class for kernel objects
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template <class Derived>
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struct kernel_creator_concrete : public kernel_creator
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{
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//! constructor inserts the kernel class in the map
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kernel_creator_concrete(const std::string &kernel_name)
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{
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get_kernel_map()[kernel_name] = this;
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}
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//! creates an instance of the kernel object
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kernel *create(config_file &cf, transfer_function *ptf, refinement_hierarchy &refh, tf_type type) const
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{
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return new Derived(cf, ptf, refh, type);
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}
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};
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//! actual implementation of the FFT convolution (independent of the actual kernel)
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void perform(kernel *pk, void *pd, bool shift, bool fix, bool flip);
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} //namespace convolution
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#endif //__CONVOLUTION_KERNELS_HH
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