smash::WallCrossActionsFinder Class Reference

#include <wallcrossingaction.h>

Finder for wall crossing actions, when using peridic boundary conditons.

Loops through all particles and checks if they cross the box wall during the next timestep.

Definition at line 50 of file wallcrossingaction.h.

Inheritance diagram for smash::WallCrossActionsFinder:

Collaboration diagram for smash::WallCrossActionsFinder:

Public Member Functions
	WallCrossActionsFinder (double l)
	Construct wallcrossing actionfinder. More...
ActionList	find_actions_in_cell (const ParticleList &plist, double t_max) const override
	Find the next wall crossings for every particle before time t_max. More...
ActionList	find_actions_with_neighbors (const ParticleList &, const ParticleList &, double) const override
	Ignore the neighbor searches for wall crossing. More...
ActionList	find_actions_with_surrounding_particles (const ParticleList &, const Particles &, double) const override
	Ignore the surrounding searches for wall crossing. More...
ActionList	find_final_actions (const Particles &, bool) const override
	No final actions for wall crossing. More...
Public Member Functions inherited from smash::ActionFinderInterface
virtual	~ActionFinderInterface ()=default

Private Attributes
const std::array< double, 3 >	l_
	Periods in x,y,z directions in fm. More...

Constructor & Destructor Documentation

smash::WallCrossActionsFinder::WallCrossActionsFinder ( double  l )

inlineexplicit

Construct wallcrossing actionfinder.

Parameters

[in]

l

Box edge length. Box is assumbed to be a cube. [fm]

Definition at line 56 of file wallcrossingaction.h.

: l_{l, l, l} {};

Member Function Documentation

ActionList smash::WallCrossActionsFinder::find_actions_in_cell ( const ParticleList &  plist, double  t_max  ) const

overridevirtual

Find the next wall crossings for every particle before time t_max.

Parameters

[in]	plist	List of all particles.
[in]	t_max	Time until crossing can appear. [fm]

Returns

List of all found wall crossings.

Implements smash::ActionFinderInterface.

Definition at line 14 of file wallcrossingaction.cc.

                                                   {
  std::vector<ActionPtr> actions;
  for (const ParticleData& p : plist) {
    const ThreeVector& r = p.position().threevec();
    const ThreeVector& v = p.velocity();
    double time_until_crossing = t_max;
    int i_cross = -1;
    for (int i = 0; i < 3; i++) {
      double t = t_max + 1.;
      if (v[i] > really_small) {
        t = (l_[i] - r[i]) / v[i];
      } else if (v[i] < -really_small) {
        t = -r[i] / v[i];
      }
      if (t < time_until_crossing) {
        time_until_crossing = t;
        i_cross = i;
      }
    }
    // No crossing
    if (i_cross == -1) {
      continue;
    }
    FourVector crossing_point(p.position().x0() + time_until_crossing,
                              r + v * time_until_crossing);
    crossing_point[i_cross + 1] = ((v[i_cross] > 0.0) ? 0.0 : l_[i_cross]);

    ParticleData outgoing_particle(p);
    outgoing_particle.set_4position(crossing_point);
    ActionPtr action = make_unique<WallcrossingAction>(p, outgoing_particle,
                                                       time_until_crossing);
    actions.emplace_back(std::move(action));
  }
  return actions;
}

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ActionList smash::WallCrossActionsFinder::find_actions_with_neighbors ( const ParticleList &  , const ParticleList &  , double    ) const

inlineoverridevirtual

Ignore the neighbor searches for wall crossing.

Implements smash::ActionFinderInterface.

Definition at line 68 of file wallcrossingaction.h.

                                                                {
    return {};
  }

ActionList smash::WallCrossActionsFinder::find_actions_with_surrounding_particles ( const ParticleList &  , const Particles &  , double    ) const

inlineoverridevirtual

Ignore the surrounding searches for wall crossing.

Implements smash::ActionFinderInterface.

Definition at line 75 of file wallcrossingaction.h.

                                                                            {
    return {};
  }

ActionList smash::WallCrossActionsFinder::find_final_actions ( const Particles &  , bool    ) const

inlineoverridevirtual

No final actions for wall crossing.

Implements smash::ActionFinderInterface.

Definition at line 82 of file wallcrossingaction.h.

                                                                        {
    return {};
  }

Member Data Documentation

const std::array<double, 3> smash::WallCrossActionsFinder::l_

private

Periods in x,y,z directions in fm.

Definition at line 88 of file wallcrossingaction.h.

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The documentation for this class was generated from the following files:

• src/include/smash/wallcrossingaction.h
• src/wallcrossingaction.cc