text: //
  // Created by wnoehring on 5/3/21.
  //
  #include "types.h"
  #include "gravity.h"
  
  void gravitation_on_particles(Forces_t &forces, const Masses_t &masses){
      for (int i = 0; i < forces.cols(); ++i) {
          forces(2, i) = gravitation(masses(i));
      }
  }
  