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/***********************************************/
/**
* @file kernel2Coefficients.cpp
*
* @brief Compute kernel coefficients.
*
* @author Andreas Kvas
* @date 2019-03-01
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
This program computes and returns the coefficients and inverse coefficients of a \configClass{kernel}{kernelType}
from from \config{minDegree} to \config{maxDegree} at a given \config{height}.
The main purpose is for visualization with \program{PlotGraph}.
)";
/***********************************************/
#include "programs/program.h"
#include "files/fileMatrix.h"
#include "classes/kernel/kernel.h"
/***** CLASS ***********************************/
/** @brief Compute kernel coefficients.
* @ingroup programsGroup */
class Kernel2Coefficients
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(Kernel2Coefficients, SINGLEPROCESS, "compute kernel coefficients", Misc)
GROOPS_RENAMED_PROGRAM(KernelComputeCoefficients, Kernel2Coefficients, date2time(2020, 9, 1))
/***********************************************/
void Kernel2Coefficients::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName fileNameOut;
KernelPtr kernel;
Double R, H;
UInt minDegree, maxDegree;
readConfig(config, "outputfileMatrix", fileNameOut, Config::MUSTSET, "", "matrix with columns degree, coefficients and inverse coefficients");
readConfig(config, "kernel", kernel, Config::MUSTSET, "", "");
readConfig(config, "minDegree", minDegree, Config::DEFAULT, "0", "minimum degree of returned coefficients");
readConfig(config, "maxDegre", maxDegree, Config::MUSTSET, "", "compute coefficients up to maxDegree");
readConfig(config, "height", H, Config::DEFAULT, "0", "evaluate kernel at R+height [m]");
readConfig(config, "R", R, Config::DEFAULT, STRING_DEFAULT_R, "reference radius");
if(isCreateSchema(config)) return;
Vector kn = kernel->coefficients(Vector3d(0, 0, R), maxDegree);
Vector kn2 = kernel->inverseCoefficients(Vector3d(0, 0, R), maxDegree);
Matrix coeffs(maxDegree+1-minDegree, 3);
for(UInt n=minDegree; n<=maxDegree; n++)
{
coeffs(n-minDegree, 0) = n;
coeffs(n-minDegree, 1) = kn(n) * std::pow((R+H)/R, n+1);
coeffs(n-minDegree, 2) = kn2(n) * std::pow(R/(R+H), n+1);
}
logStatus<<"write kernel coefficients to <"<<fileNameOut<<">"<<Log::endl;
writeFileMatrix(fileNameOut, coeffs);
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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