nearestPoint.hpp

#ifndef ABLATELIBRARY_NEARESTPOINT_HPP
#define ABLATELIBRARY_NEARESTPOINT_HPP
 
#include <filesystem>
#include <istream>
#include <vector>
#include "mathFunction.hpp"
namespace ablate::mathFunctions {
 
class NearestPoint : public MathFunction {
   private:
    const std::vector<double> coordinates;
 
    const std::vector<double> values;
 
    const std::size_t dimension;
 
    const std::size_t numberPoints;
 
   private:
    static PetscErrorCode NearestPointPetscFunction(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, PetscScalar* u, void* ctx);
 
    std::size_t FindNearestPoint(const double* xyz, std::size_t xyzDimension) const;
 
   public:
    NearestPoint(const std::vector<double>& coordinates, const std::vector<double>& values);
 
    double Eval(const double& x, const double& y, const double& z, const double& t) const override;
 
    double Eval(const double* xyz, const int& ndims, const double& t) const override;
 
    void Eval(const double& x, const double& y, const double& z, const double& t, std::vector<double>& result) const override;
 
    void Eval(const double* xyz, const int& ndims, const double& t, std::vector<double>& result) const override;
 
    void* GetContext() override { return this; }
 
    PetscFunction GetPetscFunction() override { return NearestPointPetscFunction; }
};
}  // namespace ablate::mathFunctions
#endif  // ABLATELIBRARY_NEARESTPOINT_HPP