imagingbook.pub.fd

Class PolygonSampler

java.lang.Object

imagingbook.pub.fd.PolygonSampler

public class PolygonSampler
extends Object

Constructor Summary

Constructors

Constructor and Description
PolygonSampler()

Method Summary

Modifier and Type	Method and Description
protected Point2D	interpolate(Point2D p0, Point2D p1, double alpha)
protected double	pathLength(Point2D[] V)
Point2D[]	samplePolygonUniformly(Point2D[] V, int M) Samples the closed polygon path specified by V at M equi-distant positions.
Point2D[]	samplePolygonUniformly(Point2D[] V, int M, double startFrac) This is for testing: allows to choose an arbitrary start point by setting 'startFrac' in [0,1].

Methods inherited from class java.lang.Object

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

Constructor Detail

PolygonSampler

public PolygonSampler()

Method Detail

samplePolygonUniformly

public Point2D[] samplePolygonUniformly(Point2D[] V,
                                        int M)

Samples the closed polygon path specified by V at M equi-distant positions.

Parameters:

V - the vertices of the (closed) polygon.

M - the number of sample points.

Returns:

the sample points as an array of Point2D objects.

samplePolygonUniformly

public Point2D[] samplePolygonUniformly(Point2D[] V,
                                        int M,
                                        double startFrac)

This is for testing: allows to choose an arbitrary start point by setting 'startFrac' in [0,1].

Parameters:

V - the vertices of the (closed) polygon.

M - the number of sample points.

startFrac - the position of the first sample as a fraction of the polggon's circumference in [0,1].

Returns:

the sample points as an array of Point2D objects.

pathLength

protected double pathLength(Point2D[] V)

interpolate

protected Point2D interpolate(Point2D p0,
                              Point2D p1,
                              double alpha)