MultipoleMoments.h File Reference

#include <cmath>
#include <assert.h>
#include <pup.h>
#include <OrientedBox.h>
#include <Vector3D.h>
#include "moments.h"
#include "SSEdefs.h"

Go to the source code of this file.

Classes
class	MultipoleMoments
	A representation of a multipole expansion. More...

Functions
void	calculateRadiusFarthestCorner (MultipoleMoments &m, const OrientedBox< double > &box)
	Given an enclosing box, set the multipole expansion size to the distance from the center of mass to the farthest corner of the box.
void	calculateRadiusBox (MultipoleMoments &m, const OrientedBox< double > &box)
template<typename ParticleType>
void	calculateRadiusFarthestParticle (MultipoleMoments &m, const ParticleType *begin, const ParticleType *end)
	Given the positions that make up a multipole expansion, set the distance to the farthest particle from the center of mass.
template<typename ParticleType>
void	calculateRadiusFirstParticle (MultipoleMoments &m, const ParticleType *begin, const ParticleType *end)

Detailed Description

This file defines the representation of a multipole expansion and operations between expansions.

Author

Graeme Lufkin (gwl@u.nosp@m..was.nosp@m.hingt.nosp@m.on.e.nosp@m.du)

Version

1.0

Function Documentation

calculateRadiusBox()

void calculateRadiusBox ( MultipoleMoments & m, const OrientedBox< double > & box )

inline

Given an enclosing box, set the multipole expansion size to the distance from the center of the box to the farthest corner of the box

calculateRadiusFirstParticle()

template<typename ParticleType>

void calculateRadiusFirstParticle ( MultipoleMoments & m, const ParticleType * begin, const ParticleType * end )

inline

Given list of particles, get a radius based on the first particle. N.B. this is a failover in case the box size is tiny. We assume the multipole moments have not been calculated.