Class Point2D

java.lang.Object

javafx.geometry.Point2D

All Implemented Interfaces:: Interpolatable<Point2D>

public class Point2D
extends Object
implements Interpolatable<Point2D>

A 2D geometric point that usually represents the x, y coordinates. It can also represent a relative magnitude vector's x, y magnitudes.

Since:: JavaFX 2.0

Field Summary

Fields
Modifier and Type	Field	Description
`static Point2D`	`ZERO`	Point or vector with both coordinates set to 0.

Constructor Summary

Constructors
Constructor	Description
`Point2D(double x, double y)`	Creates a new instance of `Point2D`.

Method Summary

Modifier and Type	Method	Description
`Point2D`	`add(double x, double y)`	Returns a point with the specified coordinates added to the coordinates of this point.
`Point2D`	`add(Point2D point)`	Returns a point with the coordinates of the specified point added to the coordinates of this point.
`double`	`angle(double x, double y)`	Computes the angle (in degrees) between the vector represented by this point and the specified vector.
`double`	`angle(Point2D point)`	Computes the angle (in degrees) between the vector represented by this point and the vector represented by the specified point.
`double`	`angle(Point2D p1, Point2D p2)`	Computes the angle (in degrees) between the three points with this point as a vertex.
`Point3D`	`crossProduct(double x, double y)`	Computes cross product of the vector represented by this instance and the specified vector.
`Point3D`	`crossProduct(Point2D vector)`	Computes cross product of the vector represented by this instance and the specified vector.
`double`	`distance(double x1, double y1)`	Computes the distance between this point and point `(x1, y1)`.
`double`	`distance(Point2D point)`	Computes the distance between this point and the specified `point`.
`double`	`dotProduct(double x, double y)`	Computes dot (scalar) product of the vector represented by this instance and the specified vector.
`double`	`dotProduct(Point2D vector)`	Computes dot (scalar) product of the vector represented by this instance and the specified vector.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`double`	`getX()`	The x coordinate.
`double`	`getY()`	The y coordinate.
`int`	`hashCode()`	Returns a hash code value for the point.
`Point2D`	`interpolate(Point2D endValue, double t)`	The function calculates an interpolated value along the fraction `t` between `0.0` and `1.0`.
`double`	`magnitude()`	Computes magnitude (length) of the relative magnitude vector represented by this instance.
`Point2D`	`midpoint(double x, double y)`	Returns a point which lies in the middle between this point and the specified coordinates.
`Point2D`	`midpoint(Point2D point)`	Returns a point which lies in the middle between this point and the specified point.
`Point2D`	`multiply(double factor)`	Returns a point with the coordinates of this point multiplied by the specified factor
`Point2D`	`normalize()`	Normalizes the relative magnitude vector represented by this instance.
`Point2D`	`subtract(double x, double y)`	Returns a point with the specified coordinates subtracted from the coordinates of this point.
`Point2D`	`subtract(Point2D point)`	Returns a point with the coordinates of the specified point subtracted from the coordinates of this point.
`String`	`toString()`	Returns a string representation of this `Point2D`.

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

ZERO

public static final Point2D ZERO

Point or vector with both coordinates set to 0.

Constructor Details

Point2D

public Point2D(double x, double y)

Creates a new instance of Point2D.

Parameters:: x - the x coordinate of the point; y - the y coordinate of the point

Method Details

getX

public final double getX()

The x coordinate.

Returns:: the x coordinate

getY

public final double getY()

The y coordinate.

Returns:: the y coordinate

distance

public double distance(double x1, double y1)

Computes the distance between this point and point (x1, y1).

Parameters:: x1 - the x coordinate of other point; y1 - the y coordinate of other point
Returns:: the distance between this point and point (x1, y1).

distance

public double distance(Point2D point)

Computes the distance between this point and the specified point.

Parameters:: point - the other point
Returns:: the distance between this point and the specified point.
Throws:: NullPointerException - if the specified point is null

add

public Point2D add(double x, double y)

Returns a point with the specified coordinates added to the coordinates of this point.

Parameters:: x - the X coordinate addition; y - the Y coordinate addition
Returns:: the point with added coordinates
Since:: JavaFX 8.0

add

public Point2D add(Point2D point)

Returns a point with the coordinates of the specified point added to the coordinates of this point.

Parameters:: point - the point whose coordinates are to be added
Returns:: the point with added coordinates
Throws:: NullPointerException - if the specified point is null
Since:: JavaFX 8.0

subtract

public Point2D subtract(double x, double y)

Returns a point with the specified coordinates subtracted from the coordinates of this point.

Parameters:: x - the X coordinate subtraction; y - the Y coordinate subtraction
Returns:: the point with subtracted coordinates
Since:: JavaFX 8.0

multiply

public Point2D multiply(double factor)

Returns a point with the coordinates of this point multiplied by the specified factor

Parameters:: factor - the factor multiplying the coordinates
Returns:: the point with multiplied coordinates
Since:: JavaFX 8.0

subtract

public Point2D subtract(Point2D point)

Returns a point with the coordinates of the specified point subtracted from the coordinates of this point.

Parameters:: point - the point whose coordinates are to be subtracted
Returns:: the point with subtracted coordinates
Throws:: NullPointerException - if the specified point is null
Since:: JavaFX 8.0

normalize

public Point2D normalize()

Normalizes the relative magnitude vector represented by this instance. Returns a vector with the same direction and magnitude equal to 1. If this is a zero vector, a zero vector is returned.

Returns:: the normalized vector represented by a Point2D instance
Since:: JavaFX 8.0

midpoint

public Point2D midpoint(double x, double y)

Returns a point which lies in the middle between this point and the specified coordinates.

Parameters:: x - the X coordinate of the second endpoint; y - the Y coordinate of the second endpoint
Returns:: the point in the middle
Since:: JavaFX 8.0

midpoint

public Point2D midpoint(Point2D point)

Returns a point which lies in the middle between this point and the specified point.

Parameters:: point - the other endpoint
Returns:: the point in the middle
Throws:: NullPointerException - if the specified point is null
Since:: JavaFX 8.0

angle

public double angle(double x, double y)

Computes the angle (in degrees) between the vector represented by this point and the specified vector.

Parameters:: x - the X magnitude of the other vector; y - the Y magnitude of the other vector
Returns:: the angle between the two vectors measured in degrees
Since:: JavaFX 8.0

angle

public double angle(Point2D point)

Computes the angle (in degrees) between the vector represented by this point and the vector represented by the specified point.

Parameters:: point - the other vector
Returns:: the angle between the two vectors measured in degrees, NaN if any of the two vectors is a zero vector
Throws:: NullPointerException - if the specified point is null
Since:: JavaFX 8.0

angle

public double angle(Point2D p1, Point2D p2)

Computes the angle (in degrees) between the three points with this point as a vertex.

Parameters:: p1 - one point; p2 - other point
Returns:: angle between the vectors (this, p1) and (this, p2) measured in degrees, NaN if the three points are not different from one another
Throws:: NullPointerException - if p1 or p2 is null
Since:: JavaFX 8.0

magnitude

public double magnitude()

Computes magnitude (length) of the relative magnitude vector represented by this instance.

Returns:: magnitude of the vector
Since:: JavaFX 8.0

dotProduct

public double dotProduct(double x, double y)

Computes dot (scalar) product of the vector represented by this instance and the specified vector.

Parameters:: x - the X magnitude of the other vector; y - the Y magnitude of the other vector
Returns:: the dot product of the two vectors
Since:: JavaFX 8.0

dotProduct

public double dotProduct(Point2D vector)

Computes dot (scalar) product of the vector represented by this instance and the specified vector.

Parameters:: vector - the other vector
Returns:: the dot product of the two vectors
Throws:: NullPointerException - if the specified vector is null
Since:: JavaFX 8.0

crossProduct

public Point3D crossProduct(double x, double y)

Computes cross product of the vector represented by this instance and the specified vector.

Parameters:: x - the X magnitude of the other vector; y - the Y magnitude of the other vector
Returns:: the cross product of the two vectors
Since:: JavaFX 8.0

crossProduct

public Point3D crossProduct(Point2D vector)

Computes cross product of the vector represented by this instance and the specified vector.

Parameters:: vector - the other vector
Returns:: the cross product of the two vectors
Throws:: NullPointerException - if the specified vector is null
Since:: JavaFX 8.0

interpolate

public Point2D interpolate(Point2D endValue, double t)

The function calculates an interpolated value along the fraction t between 0.0 and 1.0. When t = 1.0, endVal is returned.

Specified by:: interpolate in interface Interpolatable<Point2D>
Parameters:: endValue - target value; t - fraction between 0.0 and 1.0
Returns:: interpolated value
Since:: 13

equals

public boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

Overrides:: equals in class Object
Parameters:: obj - the reference object with which to compare
Returns:: true if this point is the same as the obj argument; false otherwise

hashCode

public int hashCode()

Returns a hash code value for the point.

Overrides:: hashCode in class Object
Returns:: a hash code value for the point.

toString

public String toString()

Returns a string representation of this Point2D. This method is intended to be used only for informational purposes. The content and format of the returned string might vary between implementations. The returned string might be empty but cannot be null.

Overrides:: toString in class Object

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Documentation extracted from JavaFX API Documentation.
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