Jcg.geometry

Class Point_d

java.lang.Object

Jcg.geometry.Point_d

All Implemented Interfaces:

java.lang.Comparable<Point_>, Point_

public class Point_d
extends java.lang.Object
implements Point_

Class for representing a point in d-dimensional space

Version:

dec 2012

Author:

Luca Castelli Aleardi, Ecole Polytechnique (INF562)

Field Summary

Fields

Modifier and Type	Field and Description
java.lang.Double[]	coordinates

Constructor Summary

Constructors

Constructor and Description
Point_d(double[] coord)
Point_d(int d)
Point_d(Point_ p)

Method Summary

Modifier and Type	Method and Description
void	barycenter(Point_[] points) Set the current point as the barycenter of an array of points
int	compareCartesian(Point_ o, int i) Compare the i-th coordinate of two points
int	compareTo(Point_ o)
int	dimension() Return the dimension of the space
boolean	equals(java.lang.Object o) Check equality between point coordinates
java.lang.Number	getCartesian(int i) return the i-th cartesian coordinate of the point
void	linearCombination(Point_[] points, java.lang.Number[] coefficients) Set the current point a linear combination of an array of points.
Vector_	minus(Point_ b) Return the vector (p-q), where q is the current point
void	setCartesian(int i, java.lang.Number x) set the i-th cartesian coordinate
void	setOrigin() set the coordinates of the origin
java.lang.Number	squareDistance(Point_ p) Return the square distance ||p-q||^2, where q is the current point
java.lang.String	toString() Return a string (representation of the point)
void	translateOf(Vector_ v) Translate the current position of vector v

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

coordinates

public java.lang.Double[] coordinates

Constructor Detail

Point_d

public Point_d(int d)

Point_d

public Point_d(double[] coord)

Point_d

public Point_d(Point_ p)

Method Detail

barycenter

public void barycenter(Point_[] points)

Description copied from interface: Point_

Set the current point as the barycenter of an array of points

Specified by:

barycenter in interface Point_

linearCombination

public void linearCombination(Point_[] points,
                              java.lang.Number[] coefficients)

Description copied from interface: Point_

Set the current point a linear combination of an array of points. Coefficients must sum to 1

Specified by:

linearCombination in interface Point_

translateOf

public void translateOf(Vector_ v)

Translate the current position of vector v

Specified by:

translateOf in interface Point_

Parameters:

v - the vector describing the translation

equals

public boolean equals(java.lang.Object o)

Check equality between point coordinates

Overrides:

equals in class java.lang.Object

Parameters:

o - the point to be compared

Returns:

true whether the coordinates of the current point coincide with 'o' coordinates

toString

public java.lang.String toString()

Description copied from interface: Point_

Return a string (representation of the point)

Specified by:

toString in interface Point_

Overrides:

toString in class java.lang.Object

dimension

public int dimension()

Description copied from interface: Point_

Return the dimension of the space

Specified by:

dimension in interface Point_

getCartesian

public java.lang.Number getCartesian(int i)

Description copied from interface: Point_

return the i-th cartesian coordinate of the point

Specified by:

getCartesian in interface Point_

setCartesian

public void setCartesian(int i,
                         java.lang.Number x)

Description copied from interface: Point_

set the i-th cartesian coordinate

Specified by:

setCartesian in interface Point_

setOrigin

public void setOrigin()

Description copied from interface: Point_

set the coordinates of the origin

Specified by:

setOrigin in interface Point_

minus

public Vector_ minus(Point_ b)

Description copied from interface: Point_

Return the vector (p-q), where q is the current point

Specified by:

minus in interface Point_

squareDistance

public java.lang.Number squareDistance(Point_ p)

Description copied from interface: Point_

Return the square distance ||p-q||^2, where q is the current point

Specified by:

squareDistance in interface Point_

compareTo

public int compareTo(Point_ o)

Specified by:

compareTo in interface java.lang.Comparable<Point_>

compareCartesian

public int compareCartesian(Point_ o,
                            int i)

Compare the i-th coordinate of two points

Specified by:

compareCartesian in interface Point_

Parameters:

o - the point to compare

i - the i-th coordinate to compare

Returns:

the result is -1 if first point is smaller then point o, return 1 is first point is greater then o, and 0 otherwise