org.apache.commons.math3.geometry.euclidean.twod

Class Line.LineTransform

java.lang.Object

org.apache.commons.math3.geometry.euclidean.twod.Line.LineTransform

All Implemented Interfaces:

Transform<Euclidean2D,Euclidean1D>

Enclosing class:

Line

private static class Line.LineTransform
extends java.lang.Object
implements Transform<Euclidean2D,Euclidean1D>

Class embedding an affine transform.

This class is used in order to apply an affine transform to a line. Using a specific object allow to perform some computations on the transform only once even if the same transform is to be applied to a large number of lines (for example to a large polygon)./

Field Summary

Fields

Modifier and Type	Field and Description
private double	c11 cXX * cYY - cYX * cXY.
private double	c1X cXX * cY1 - cYX * cX1.
private double	c1Y cXY * cY1 - cYY * cX1.
private double	cX1 Transform addendum for output abscissa.
private double	cXX Transform factor between input abscissa and output abscissa.
private double	cXY Transform factor between input ordinate and output abscissa.
private double	cY1 Transform addendum for output ordinate.
private double	cYX Transform factor between input abscissa and output ordinate.
private double	cYY Transform factor between input ordinate and output ordinate.

Constructor Summary

Constructors

Constructor and Description
Line.LineTransform(double cXX, double cYX, double cXY, double cYY, double cX1, double cY1) Build an affine line transform from a n AffineTransform.

Method Summary

Methods

Modifier and Type	Method and Description
Line	apply(Hyperplane<Euclidean2D> hyperplane) Transform an hyperplane of a space.
Vector2D	apply(Point<Euclidean2D> point) Transform a point of a space.
SubHyperplane<Euclidean1D>	apply(SubHyperplane<Euclidean1D> sub, Hyperplane<Euclidean2D> original, Hyperplane<Euclidean2D> transformed) Transform a sub-hyperplane embedded in an hyperplane.

Methods inherited from class java.lang.Object

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

Field Detail

cXX

private double cXX

Transform factor between input abscissa and output abscissa.

cYX

private double cYX

Transform factor between input abscissa and output ordinate.

cXY

private double cXY

Transform factor between input ordinate and output abscissa.

cYY

private double cYY

Transform factor between input ordinate and output ordinate.

cX1

private double cX1

Transform addendum for output abscissa.

cY1

private double cY1

Transform addendum for output ordinate.

c1Y

private double c1Y

cXY * cY1 - cYY * cX1.

c1X

private double c1X

cXX * cY1 - cYX * cX1.

c11

private double c11

cXX * cYY - cYX * cXY.

Constructor Detail

Line.LineTransform

Line.LineTransform(double cXX,
                  double cYX,
                  double cXY,
                  double cYY,
                  double cX1,
                  double cY1)
             throws MathIllegalArgumentException

Build an affine line transform from a n AffineTransform.

Parameters:

cXX - transform factor between input abscissa and output abscissa

cYX - transform factor between input abscissa and output ordinate

cXY - transform factor between input ordinate and output abscissa

cYY - transform factor between input ordinate and output ordinate

cX1 - transform addendum for output abscissa

cY1 - transform addendum for output ordinate

Throws:

MathIllegalArgumentException - if the transform is non invertible

Since:

3.6

Method Detail

apply

public Vector2D apply(Point<Euclidean2D> point)

Transform a point of a space.

Specified by:

apply in interface Transform<Euclidean2D,Euclidean1D>

Parameters:

point - point to transform

Returns:

a new object representing the transformed point

apply

public Line apply(Hyperplane<Euclidean2D> hyperplane)

Transform an hyperplane of a space.

Specified by:

apply in interface Transform<Euclidean2D,Euclidean1D>

Parameters:

hyperplane - hyperplane to transform

Returns:

a new object representing the transformed hyperplane

apply

public SubHyperplane<Euclidean1D> apply(SubHyperplane<Euclidean1D> sub,
                               Hyperplane<Euclidean2D> original,
                               Hyperplane<Euclidean2D> transformed)

Transform a sub-hyperplane embedded in an hyperplane.

Specified by:

apply in interface Transform<Euclidean2D,Euclidean1D>

Parameters:

sub - sub-hyperplane to transform

original - hyperplane in which the sub-hyperplane is defined (this is the original hyperplane, the transform has not been applied to it)

transformed - hyperplane in which the sub-hyperplane is defined (this is the transformed hyperplane, the transform has been applied to it)

Returns:

a new object representing the transformed sub-hyperplane