org.graphstream.ui.geom

Class Point2

java.lang.Object

org.graphstream.ui.geom.Point2

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Point3

public class Point2
extends Object
implements Serializable

2D point. A Point2 is a 2D location in an affine space described by three values along the X, and Y axes. This differs from the Vector3 and Vector4 classes in that it is only 2D and has no vector arithmetic bound to it (to points cannot be added, this would have no mathematical meaning).

Since:

20001121 creation

Version:

0.1

Author:

Antoine Dutot

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static Point2	NULL_POINT2 Specific point at (0,0).
double	x X axis value.
double	y Y axis value.

Constructor Summary

Constructors

Constructor and Description
Point2() New 2D point at (0,0).
Point2(double x, double y) New 2D point at (x,y).
Point2(Point2 other) New copy of other.

Method Summary

Methods

Modifier and Type	Method and Description
void	copy(Point2 other) Make this a copy of other.
double	distance(Point2 other) Distance between this and other.
boolean	equals(Object o)
int	hashCode()
Point2	interpolate(Point2 other, double factor) Create a new point linear interpolation of this and other.
boolean	isZero() Are all components to zero?.
void	make(double x, double y) New 2D point at (x,y).
void	move(double dx, double dy) Move of given vector (dx,dy).
void	move(Point2 p) Move of given point p.
void	moveTo(double x, double y) Move to absolute position (x,y).
void	moveX(double dx) Move horizontally of dx.
void	moveY(double dy) Move vertically of dy.
void	scale(double sx, double sy) Scale of factor (sx,sy).
void	scale(Point2 s) Scale by factor s.
void	set(double x, double y) Like #moveTo().
void	setX(double x) Change only abscissa at absolute coordinate x.
void	setY(double y) Change only ordinate at absolute coordinate y.
void	swap(Point2 other) Exchange the values of this and other.
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Detail

x

public double x

X axis value.

y

public double y

Y axis value.

NULL_POINT2

public static final Point2 NULL_POINT2

Specific point at (0,0).

Constructor Detail

Point2

public Point2()

New 2D point at (0,0).

Point2

public Point2(double x,
      double y)

New 2D point at (x,y).

Point2

public Point2(Point2 other)

New copy of other.

Method Detail

make

public void make(double x,
        double y)

New 2D point at (x,y).

isZero

public boolean isZero()

Are all components to zero?.

interpolate

public Point2 interpolate(Point2 other,
                 double factor)

Create a new point linear interpolation of this and other. The new point is located between this and other if factor is between 0 and 1 (0 yields this point, 1 yields the other point).

distance

public double distance(Point2 other)

Distance between this and other.

copy

public void copy(Point2 other)

Make this a copy of other.

set

public void set(double x,
       double y)

Like #moveTo().

moveTo

public void moveTo(double x,
          double y)

Move to absolute position (x,y).

move

public void move(double dx,
        double dy)

Move of given vector (dx,dy).

move

public void move(Point2 p)

Move of given point p.

moveX

public void moveX(double dx)

Move horizontally of dx.

moveY

public void moveY(double dy)

Move vertically of dy.

scale

public void scale(double sx,
         double sy)

Scale of factor (sx,sy).

scale

public void scale(Point2 s)

Scale by factor s.

setX

public void setX(double x)

Change only abscissa at absolute coordinate x.

setY

public void setY(double y)

Change only ordinate at absolute coordinate y.

swap

public void swap(Point2 other)

Exchange the values of this and other.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object