Package org.apache.commons.rng.sampling.shape

Class TriangleSampler.TriangleSampler2D

java.lang.Object

org.apache.commons.rng.sampling.shape.TriangleSampler

org.apache.commons.rng.sampling.shape.TriangleSampler.TriangleSampler2D

All Implemented Interfaces:

ObjectSampler<double[]>, SharedStateObjectSampler<double[]>, SharedStateSampler<SharedStateObjectSampler<double[]>>

Enclosing class:

TriangleSampler

private static final class TriangleSampler.TriangleSampler2D
extends TriangleSampler

Sample uniformly from a triangle in 2D. This is an non-array based specialisation of TriangleSampler.TriangleSamplerND for performance.

Field Summary

Fields

Modifier and Type	Field	Description
private double	ax	The x component of vertex a.
private double	ay	The y component of vertex a.
private double	bx	The x component of vertex b.
private double	by	The y component of vertex b.
private double	cx	The x component of vertex c.
private double	cy	The y component of vertex c.

Constructor Summary

Constructors

Constructor	Description
TriangleSampler2D(UniformRandomProvider rng, double[] a, double[] b, double[] c)
TriangleSampler2D(UniformRandomProvider rng, TriangleSampler.TriangleSampler2D source)

Method Summary

Modifier and Type	Method	Description
double[]	createSample(double p1msmt, double s, double t)	Creates the sample given the random variates s and t in the interval [0, 1] and s + t <= 1.
TriangleSampler	withUniformRandomProvider(UniformRandomProvider rng)	Create a new instance of the sampler with the same underlying state using the given uniform random provider as the source of randomness.

Methods inherited from class org.apache.commons.rng.sampling.shape.TriangleSampler

of, sample

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.commons.rng.sampling.ObjectSampler

samples, samples

Field Detail

ax

private final double ax

The x component of vertex a.

ay

private final double ay

The y component of vertex a.

bx

private final double bx

The x component of vertex b.

by

private final double by

The y component of vertex b.

cx

private final double cx

The x component of vertex c.

cy

private final double cy

The y component of vertex c.

Constructor Detail

TriangleSampler2D

TriangleSampler2D(UniformRandomProvider rng,
                  double[] a,
                  double[] b,
                  double[] c)

Parameters:

rng - Source of randomness.

a - The first vertex.

b - The second vertex.

c - The third vertex.

TriangleSampler2D

TriangleSampler2D(UniformRandomProvider rng,
                  TriangleSampler.TriangleSampler2D source)

Parameters:

rng - Generator of uniformly distributed random numbers

source - Source to copy.

Method Detail

createSample

public double[] createSample(double p1msmt,
                             double s,
                             double t)

Description copied from class: TriangleSampler

Creates the sample given the random variates s and t in the interval [0, 1] and s + t <= 1. The sum 1 - s - t is provided. The sample can be obtained from the triangle abc using:

 p = a(1 - s - t) + sb + tc
 

Specified by:

createSample in class TriangleSampler

Parameters:

p1msmt - plus 1 minus s minus t (1 - s - t)

s - the first variate s

t - the second variate t

Returns:

the sample

withUniformRandomProvider

public TriangleSampler withUniformRandomProvider(UniformRandomProvider rng)

Description copied from class: TriangleSampler

Create a new instance of the sampler with the same underlying state using the given uniform random provider as the source of randomness.

Specified by:

withUniformRandomProvider in interface SharedStateSampler<SharedStateObjectSampler<double[]>>

Specified by:

withUniformRandomProvider in class TriangleSampler

Parameters:

rng - Generator of uniformly distributed random numbers.

Returns:

the sampler