R.h

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#ifndef R_H
#define R_H
 
#include <GeneralDefine.h>
#include <iostream>
#include "Math/Vector.h"
#include "Base_X_Y_Z.h"
#include <vector>
#include <array>
#include "Math/ExtendedMath.h"
 
class BaseParticle;
 
class BaseInteraction;
 
class DPMBase;
 
namespace CGCoordinates
{
 
class R : public Base_X_Y_Z
{
public:
    
    static void writeNames(std::ostream& os);
    
    void write(std::ostream& os) const;
    
    static Mdouble getVolumeOfAveragedDimensions(const Vec3D& min, const Vec3D& max);
    
    Mdouble getDistanceSquared(const Vec3D& p) const;
    
    static Mdouble getLength(const Vec3D& p);
    
    void setR(Mdouble r);
    
    const Mdouble getR() const
    { return r_; }
    
    Mdouble getINormal(const BaseInteraction& c, const Vec3D& normal) const;
    
    Mdouble getPNormal(const BaseInteraction& c, const Vec3D& normal) const;
    
    Mdouble getCNormal(const BaseInteraction& c, const Vec3D& normal) const;
    
    static void normalisePolynomialCoefficients(std::vector<Mdouble>& coefficients, Mdouble cutoff);
    
    Mdouble getWeight() override;
    
    static Mdouble getDomainVolume(const Vec3D& min, const Vec3D& max);
 
    static bool isResolvedIn(unsigned i) {return i==0?true:false;}
 
    static std::string getName();
 
protected:
    
    Mdouble r_;
};
 
template<typename T>
typename std::enable_if<std::is_base_of<CGCoordinates::R, typename T::CoordinatesType>::value, void>::type
spaceEvenly(Vec3D min, Vec3D max, std::vector<std::size_t> nAll, std::vector<T>& points)
{
    //note, the x-coordinate represents the r-coordinate here
    std::size_t n = nAll[0];
    Mdouble start = min.X;
    Mdouble delta = (max.X - start) / n;
//    Mdouble end = sqrt(mathsFunc::square(std::fmax(-min.X,max.X))+mathsFunc::square(std::fmax(-min.Y,max.Y)));
//    Mdouble start = 0;
//    Mdouble delta = (end - start) / n;
    if (start < 0.0)
    {
        if (max.X > 0.0)
        {
            start = 0.0;
        }
        else
        {
            start = -max.X;
            delta = (-min.X - start) / n;
        }
        logger(WARN, "r should be positive, but x-limits are not;"
                     "grid is set within % <r<%", start, start + delta * (n + 1));
    }
    start += 0.5 * delta;
    points.resize(n);
    for (std::size_t i = 0; i < n; i++)
    {
        points[i].coordinates.setR(start + delta * i);
    }
}
    
}
#endif