java.lang.Object
- org.meteoinfo.jts.math.Vector2D

```
public class Vector2D
extends java.lang.Object
```
A 2-dimensional mathematical vector represented by double-precision X and Y components.

Constructor Summary

Constructors
Constructor	Description
`Vector2D()`
`Vector2D(double x, double y)`
`Vector2D(Coordinate v)`
`Vector2D(Coordinate from, Coordinate to)`
`Vector2D(Vector2D v)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Vector2D`	`add(Vector2D v)`
`double`	`angle()`
`double`	`angle(Vector2D v)`
`double`	`angleTo(Vector2D v)`
`Vector2D`	`average(Vector2D v)`
`java.lang.Object`	`clone()`	Creates a copy of this vector
`static Vector2D`	`create(double x, double y)`	Creates a new vector with given X and Y components.
`static Vector2D`	`create(Coordinate coord)`	Creates a vector from a `Coordinate`.
`static Vector2D`	`create(Coordinate from, Coordinate to)`	Creates a vector with the direction and magnitude of the difference between the `to` and `from` `Coordinate`s.
`static Vector2D`	`create(Vector2D v)`	Creates a new vector from an existing one.
`double`	`distance(Vector2D v)`	Computes the distance between this vector and another one.
`Vector2D`	`divide(double d)`	Divides the vector by a scalar value.
`double`	`dot(Vector2D v)`	Computes the dot-product of two vectors
`boolean`	`equals(java.lang.Object o)`	Tests if a vector `o` has the same values for the x and y components.
`double`	`getComponent(int index)`
`double`	`getX()`
`double`	`getY()`
`int`	`hashCode()`	Gets a hashcode for this vector.
`boolean`	`isParallel(Vector2D v)`
`double`	`length()`
`double`	`lengthSquared()`
`Vector2D`	`multiply(double d)`	Multiplies the vector by a scalar value.
`Vector2D`	`negate()`
`Vector2D`	`normalize()`
`Vector2D`	`rotate(double angle)`
`Vector2D`	`rotateByQuarterCircle(int numQuarters)`	Rotates a vector by a given number of quarter-circles (i.e.
`Vector2D`	`subtract(Vector2D v)`
`Coordinate`	`toCoordinate()`
`java.lang.String`	`toString()`	Gets a string representation of this vector
`Coordinate`	`translate(Coordinate coord)`
`Vector2D`	`weightedSum(Vector2D v, double frac)`	Computes the weighted sum of this vector with another vector, with this vector contributing a fraction of `frac` to the total.

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Vector2D
```
public Vector2D()
```
  - Vector2D
```
public Vector2D(double x,
                double y)
```
  - Vector2D
```
public Vector2D(Vector2D v)
```
  - Vector2D
```
public Vector2D(Coordinate from,
                Coordinate to)
```
  - Vector2D
```
public Vector2D(Coordinate v)
```
- Method Detail
  - create
```
public static Vector2D create(double x,
                              double y)
```
    Creates a new vector with given X and Y components.
    
    Parameters:
    
    x - the x component
    
    y - the y component
    
    Returns:
    
    a new vector
  - create
```
public static Vector2D create(Vector2D v)
```
    Creates a new vector from an existing one.
    
    Parameters:
    
    v - the vector to copy
    
    Returns:
    
    a new vector
  - create
```
public static Vector2D create(Coordinate coord)
```
    Creates a vector from a Coordinate.
    
    Parameters:
    
    coord - the Coordinate to copy
    
    Returns:
    
    a new vector
  - create
```
public static Vector2D create(Coordinate from,
                              Coordinate to)
```
    Creates a vector with the direction and magnitude of the difference between the to and from Coordinates.
    
    Parameters:
    
    from - the origin Coordinate
    
    to - the destination Coordinate
    
    Returns:
    
    a new vector
  - getX
```
public double getX()
```
  - getY
```
public double getY()
```
  - getComponent
```
public double getComponent(int index)
```
  - add
```
public Vector2D add(Vector2D v)
```
  - subtract
```
public Vector2D subtract(Vector2D v)
```
  - multiply
```
public Vector2D multiply(double d)
```
    Multiplies the vector by a scalar value.
    
    Parameters:
    
    d - the value to multiply by
    
    Returns:
    
    a new vector with the value v * d
  - divide
```
public Vector2D divide(double d)
```
    Divides the vector by a scalar value.
    
    Parameters:
    
    d - the value to divide by
    
    Returns:
    
    a new vector with the value v / d
  - negate
```
public Vector2D negate()
```
  - length
```
public double length()
```
  - lengthSquared
```
public double lengthSquared()
```
  - normalize
```
public Vector2D normalize()
```
  - average
```
public Vector2D average(Vector2D v)
```
  - weightedSum
```
public Vector2D weightedSum(Vector2D v,
                            double frac)
```
    Computes the weighted sum of this vector with another vector, with this vector contributing a fraction of frac to the total.
    In other words,
    sum = frac * this + (1 - frac) * v
    Parameters:
    
    v - the vector to sum
    
    frac - the fraction of the total contributed by this vector
    
    Returns:
    
    the weighted sum of the two vectors
  - distance
```
public double distance(Vector2D v)
```
    Computes the distance between this vector and another one.
    
    Parameters:
    
    v - a vector
    
    Returns:
    
    the distance between the vectors
  - dot
```
public double dot(Vector2D v)
```
    Computes the dot-product of two vectors
    
    Parameters:
    
    v - a vector
    
    Returns:
    
    the dot product of the vectors
  - angle
```
public double angle()
```
  - angle
```
public double angle(Vector2D v)
```
  - angleTo
```
public double angleTo(Vector2D v)
```
  - rotate
```
public Vector2D rotate(double angle)
```
  - rotateByQuarterCircle
```
public Vector2D rotateByQuarterCircle(int numQuarters)
```
    Rotates a vector by a given number of quarter-circles (i.e. multiples of 90 degrees or Pi/2 radians). A positive number rotates counter-clockwise, a negative number rotates clockwise. Under this operation the magnitude of the vector and the absolute values of the ordinates do not change, only their sign and ordinate index.
    
    Parameters:
    
    numQuarters - the number of quarter-circles to rotate by
    
    Returns:
    
    the rotated vector.
  - isParallel
```
public boolean isParallel(Vector2D v)
```
  - translate
```
public Coordinate translate(Coordinate coord)
```
  - toCoordinate
```
public Coordinate toCoordinate()
```
  - clone
```
public java.lang.Object clone()
```
    Creates a copy of this vector
    
    Overrides:
    
    clone in class java.lang.Object
    
    Returns:
    
    a copy of this vector
  - toString
```
public java.lang.String toString()
```
    Gets a string representation of this vector
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    a string representing this vector
  - equals
```
public boolean equals(java.lang.Object o)
```
    Tests if a vector o has the same values for the x and y components.
    
    Overrides:
    
    equals in class java.lang.Object
    
    Parameters:
    
    o - a Vector2D with which to do the comparison.
    
    Returns:
    
    true if other is a Vector2D with the same values for the x and y components.
  - hashCode
```
public int hashCode()
```
    Gets a hashcode for this vector.
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    a hashcode for this vector

Class Vector2D

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Vector2D

Vector2D

Vector2D

Vector2D

Vector2D

Method Detail

create

create

create

create

getX

getY

getComponent

add

subtract

multiply

divide

negate

length

lengthSquared

normalize

average

weightedSum

distance

dot

angle

angle

angleTo

rotate

rotateByQuarterCircle

isParallel

translate

toCoordinate

clone

toString

equals

hashCode