SimpleForceSource.h

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#pragma once
 
#include <iostream>
 
#include "particles/Particle.h"
 
class SimpleForceSource {
   public:
    virtual ~SimpleForceSource() = default;
 
    virtual std::array<double, 3UL> calculateForce(Particle& p) const = 0;
 
    virtual explicit operator std::string() const = 0;
};
 
// overload the << operator for the ForceSource class to allow easier printing
inline std::ostream& operator<<(std::ostream& os, const SimpleForceSource& forceSource) {
    os << static_cast<std::string>(forceSource);
    return os;
}