math.geom2d.transform
Class GlideReflection2D

java.lang.Object
  math.geom2d.transform.AbstractAffineTransform2D
      math.geom2d.transform.GlideReflection2D

All Implemented Interfaces:

AffineTransform2D, Bijection2D, Isometry2D, Similarity2D, Transform2D

public class GlideReflection2D
extends AbstractAffineTransform2D
implements Isometry2D

A glide reflection is generated by applying first a reflection along a line, then a translation in the direction given by the line. The composition of 2 glide reflections is equivalent to a translation.

Author:

dlegland

Nested Class Summary

Nested classes/interfaces inherited from class math.geom2d.transform.AbstractAffineTransform2D

AbstractAffineTransform2D.Identity2D

Constructor Summary

GlideReflection2D(StraightObject2D line, double distance)

Method Summary

double[][]	getAffineMatrix() return matrix of the transform coefficients.
double[]	getCoefficients() return coefficients of the transform.
GlideReflection2D	getInverseTransform()
LinearTransform2D	getLinearPart()
double	getScalingFactor() The scaling factor is 1 by definition.
Translation2D	getTranslationPart()
boolean	isDirect() Returns false by definition of glide reflection.
boolean	isIdentity() Returns false by definition.
boolean	isIsometry() Returns true by definition of glide reflection.
boolean	isMotion() Returns true if translation part is equivalent to identity.
boolean	isSimilarity() Returns true by definition of glide reflection.

Methods inherited from class math.geom2d.transform.AbstractAffineTransform2D

compose, createRotation, createRotation, createRotation, createScaling, createScaling, createTranslation, createTranslation, equals, isDirect, isIdentity, isIsometry, isMotion, isSimilarity, transform, transform, transform

Methods inherited from class java.lang.Object

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

Methods inherited from interface math.geom2d.transform.AffineTransform2D

compose

Methods inherited from interface math.geom2d.transform.Transform2D

transform, transform, transform

Constructor Detail

GlideReflection2D

public GlideReflection2D(StraightObject2D line,
                         double distance)

Method Detail

isSimilarity

public boolean isSimilarity()

Returns true by definition of glide reflection.

Specified by:

isSimilarity in interface AffineTransform2D

Overrides:

isSimilarity in class AbstractAffineTransform2D

isMotion

public boolean isMotion()

Returns true if translation part is equivalent to identity.

Specified by:

isMotion in interface AffineTransform2D

Overrides:

isMotion in class AbstractAffineTransform2D

Returns:

true in case of motion.

isIsometry

public boolean isIsometry()

Returns true by definition of glide reflection.

Specified by:

isIsometry in interface AffineTransform2D

Overrides:

isIsometry in class AbstractAffineTransform2D

Returns:

true in case of isometry.

isDirect

public boolean isDirect()

Returns false by definition of glide reflection.

Specified by:

isDirect in interface AffineTransform2D

Specified by:

isDirect in interface Isometry2D

Overrides:

isDirect in class AbstractAffineTransform2D

Returns:

true if transform is direct.

isIdentity

public boolean isIdentity()

Returns false by definition.

Specified by:

isIdentity in interface AffineTransform2D

Overrides:

isIdentity in class AbstractAffineTransform2D

Returns:

true if the transform is identity

getLinearPart

public LinearTransform2D getLinearPart()

Specified by:

getLinearPart in interface Similarity2D

Returns:

the linear part of the transform.

getScalingFactor

public double getScalingFactor()

The scaling factor is 1 by definition.

Specified by:

getScalingFactor in interface Similarity2D

Returns:

the scaling factor of the transform.

getTranslationPart

public Translation2D getTranslationPart()

Specified by:

getTranslationPart in interface Similarity2D

Returns:

the translation part of the transform.

getAffineMatrix

public double[][] getAffineMatrix()

Description copied from interface: AffineTransform2D

return matrix of the transform coefficients. Result is a 2x3 array of double.

Specified by:

getAffineMatrix in interface AffineTransform2D

getCoefficients

public double[] getCoefficients()

Description copied from interface: AffineTransform2D

return coefficients of the transform. Result is an array of 6 double.

Specified by:

getCoefficients in interface AffineTransform2D

getInverseTransform

public GlideReflection2D getInverseTransform()

Specified by:

getInverseTransform in interface Bijection2D