generatingPoints.h File Reference

#include "structures.h"
#include <vector>
#include <random>
#include "distributions.h"

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Functions
std::vector< Point >	discretizeLineOfIntersection (double *pt1, double *pt2, double dist)
struct Point	lineFunction3D (double *v, double *point, double t)
double *	fisherDistribution (double theta, double phi, double kappa, std::mt19937_64 &generator)
double *	randomTranslation (std::mt19937_64 &generator, float xMin, float xMax, float yMin, float yMax, float zMin, float zMax)
float	truncatedPowerLaw (float randomNum, float emin, float emax, float alpha)
void	generateTheta (float *&thetaArray, float aspectRatio, int nPoints)
bool	greaterThan (float i, float j)

Function Documentation

discretizeLineOfIntersection()

std::vector<Point> discretizeLineOfIntersection	(	double *	pt1,
		double *	pt2,
		double	dist
	)

Discretizes intersetion Arg 1: End point 1, array of three doubles {x, y, z} Arg 2: End point 2, array of three doubles {x, y, z} Return: List of 3D points of the discretized nodes, including end points

Definition at line 18 of file generatingPoints.cpp.

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fisherDistribution()

double* fisherDistribution	(	double	theta,
		double	phi,
		double	kappa,
		std::mt19937_64 &	generator
	)

Creates and returns an x,y,z array of doubles using fisher distribution.

NOTE: Uses new[] to return an array. NEED TO USE delete[] TO FREE THE MEMORY AFTER USE

Arg 1: theta, the angle the normal vector makes with the z-axis Arg 2: phi, the angle the projection of the normal onto the x-y plane makes with the x-axis Arg 3: kappa, parameter for the fisher distribnShaprutions Arg 4: Random generator, see std c++ <random> library Return: A fisher distribution array {x, y, z}. Used for random generation of polygon normal vectors.

Definition at line 93 of file generatingPoints.cpp.

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generateTheta()

void generateTheta	(	float *&	thetaArray,
		float	aspectRatio,
		int	nPoints
	)

Integrate diff eq for theta as function of arc length using RK2 Used once for each ell family, saves theta array to shape structures Arg 1: OUTPUT, Theta array used for ellipse generation Arg 2: Aspect ratio of ellipse family Arg 3: Number of points being used for ellipse family

Definition at line 224 of file generatingPoints.cpp.

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greaterThan()

bool greaterThan	(	float	i,
		float	j
	)

Used for sort() in generateRadiiLists() Compares two floats.

Arg 1: float i Arg 2: float j Return: True if i > j False otherwise

Definition at line 263 of file generatingPoints.cpp.

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lineFunction3D()

struct Point lineFunction3D	(	double *	v,
		double *	point,
		double	t
	)

Returns a point on the line/vector v at point t, 0 <= t <= 1 Arg 1: Array of three doubles {x, y, z}, vector of line segment Arg 2: Array of three doubles {x, y, z}, end point on line Arg 3: t, 0<= t <= 1 Return: Point on line

Definition at line 72 of file generatingPoints.cpp.

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randomTranslation()

double* randomTranslation	(	std::mt19937_64 &	generator,
		float	xMin,
		float	xMax,
		float	yMin,
		float	yMax,
		float	zMin,
		float	zMax
	)

Uses new[] to pass a vector/array. NEED TO USE delete[] TO FREE THE MEMORY AFTER USE Arg 1: Random generator, see std c++ <random> library Arg 2: minimum x for random x Arg 3: maximum x for random x Arg 4: maximum y for random y Arg 5: minimum y for random y Arg 6: maximum z for random z Arg 7: minimum z for random z Return: Pointer to random ranslation, array of three doubles {x, y, z}

Definition at line 177 of file generatingPoints.cpp.

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truncatedPowerLaw()

float truncatedPowerLaw	(	float	randomNum,
		float	min,
		float	max,
		float	alpha
	)

Distrubution function for truncated power-law randomNum must be between 0 and 1 This distribution should be sampled uniformly between 0 and 1 to produce a truncated power-law distribution Arg 1: Random variable between 0 and 1 Arg 2: Minimum number which can be returned from the distribution Arg 3: Maximum number which can be returned from the distribution Arg 4: Power-law's alpha Return: Random float adhering to the truncated power law distribution

Definition at line 208 of file generatingPoints.cpp.