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 final 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.
    final double
    getX()
    The x coordinate.
    final double
    getY()
    The y coordinate.
    int
    hashCode()
    Returns a hash code value for the point.
    Point2D
    interpolate(Point2D endValue, double t)
    Returns an intermediate value between the value of this Interpolatable and the specified endValue using the linear interpolation factor t.
    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.
      Interpolation Type:
      linear
      Returns:
      the x coordinate

    • getY

      public final double getY()
      The y coordinate.
      Interpolation Type:
      linear
      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)
      Returns an intermediate value between the value of this Interpolatable and the specified endValue using the linear interpolation factor t. The interpolation factor can be any finite value.

      The returned value might not be a new instance; the implementation might also return one of the two existing instances if the intermediate value would be equal to one of the existing values. However, this is an optimization and applications should not assume any particular identity of the returned value.

      Specified by:
      interpolate in interface Interpolatable<Point2D>
      Parameters:
      endValue - the target value
      t - the interpolation factor
      Returns:
      the intermediate value
      Throws:
      NullPointerException - if endValue is null
      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