vecrand.cpp File Reference

#include "vecrand.hpp"

Functions
normdistribution	mynormaldistribution (0, 1)
normgenerator	gauss (randengine, mynormaldistribution)
lingenerator	uniformrand (randengine, mylineardistribution)
flt	rand01 ()
	Generate a random number between 0 and 1, using the "global" random number generator. More...
Vec	rand_vec ()
	Generate a random vector from a Gaussian distribution, i.e. More...
Vec	rand_vec_boxed ()
	Generate a random vector inside a box with sides of length 1. More...
unsigned int	seed (unsigned int n)
	Seed the global random number generator with a given integer. More...
unsigned int	seed ()
	Seed the global random number generator with the current time. More...
long double	to_LD (double e)
	Go to and from Long Doubles. More...
double	from_LD (long double e)
	Go to and from Long Doubles. More...
vector< long double >	LDVector (vector< double > dists)
	Go to and from Long Doubles. More...
Matrix	best_rotation_matrix (Eigen::Matrix< flt, Eigen::Dynamic, NDIM > &from, Eigen::Matrix< flt, Eigen::Dynamic, NDIM > &to)

Variables
engine	randengine
lindistribution	mylineardistribution

Function Documentation

Matrix best_rotation_matrix	(	Eigen::Matrix< flt, Eigen::Dynamic, NDIM > &	from,
		Eigen::Matrix< flt, Eigen::Dynamic, NDIM > &	to
	)

double from_LD

(

long double

e

)

Go to and from Long Doubles.

Useful from Python.

normgenerator gauss	(	randengine	,
		mynormaldistribution
	)

vector<long double> LDVector

(

vector< double >

dists

)

Go to and from Long Doubles.

Useful from Python.

normdistribution mynormaldistribution	(	0	,
		1
	)

flt rand01

(

)

Generate a random number between 0 and 1, using the "global" random number generator.

Vec rand_vec

(

)

Generate a random vector from a Gaussian distribution, i.e.

\ \(P(x)=\frac{1}{\sqrt{2 \pi}} e^{\frac{-x^2}{2\pi}}\), and similarly for \(y\) and \(z\).

In terms of spherical coordinates, directionality is uniform on a sphere, and the radial distribution is a Chi Distribution with \(\sigma=1\).

Examples:

LJatoms.cpp.

Vec rand_vec_boxed

(

)

Generate a random vector inside a box with sides of length 1.

unsigned int seed

(

unsigned int

n

)

Seed the global random number generator with a given integer.

Examples:

hardspheres.cpp, LJatoms.cpp, and packer.cpp.

unsigned int seed

(

)

Seed the global random number generator with the current time.

Returns

the seed used.

long double to_LD

(

double

e

)

Go to and from Long Doubles.

Useful from Python.

lingenerator uniformrand	(	randengine	,
		mylineardistribution
	)

Variable Documentation

lindistribution mylineardistribution

engine randengine