java.lang.Object
- org.robwork.sdurw_math.Vector2D

```
public class Vector2D
extends java.lang.Object
```
A 2D vector \mathbf{v}\in \mathbb{R}^2

\robabx{i}{j}{\mathbf{v}} = \left[ \begin{array}{c} v_x \\ v_y \end{array} \right]

In addition, Vector2D supports the cross product operator:
v3 = cross(v1, v2)

Usage example:
using namespace rw::math; Vector2D<> v1(1.0, 2.0); Vector2D<> v2(6.0, 7.0); Vector2D<> v3 = cross( v1, v2 ); Vector2D<> v4 = v2 - v1;

Constructor Summary

Constructors
Constructor	Description
`Vector2D()`	Creates a 2D vector initialized with 0's
`Vector2D(double x, double y)`	Creates a 2D vector
`Vector2D(long cPtr, boolean cMemoryOwn)`
`Vector2D(Vector2D copy)`	Copy Constructor

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Vector2D`	`add(Vector2D b)`	Vector addition.
`Vector2D`	`addAssign(Vector2D v)`	Vector addition.
`double`	`angle()`	returns the counter clock-wise angle between this vector and the x-axis vector (1,0).
`void`	`delete()`
`Vector2D`	`devideAssign(double s)`	Scalar division.
`Vector2D`	`divide(double s)`	Scalar division.
`EigenVector2d`	`e()`	Returns Eigen vector equivalent to *this.
`boolean`	`equals(Vector2D b)`	Compares a and b for equality.
`double`	`get(long i)`
`static long`	`getCPtr(Vector2D obj)`
`Vector2D`	`multiply(double s)`	Scalar multiplication.
`Vector2D`	`multiplyAssign(double s)`	Scalar multiplication.
`Vector2D`	`negate()`	Unary minus.
`double`	`norm1()`	Returns the Manhatten norm (1-norm) of the vector
`double`	`norm2()`	Returns the Euclidean norm (2-norm) of the vector
`double`	`normInf()`	Returns the infinte norm ( \inf-norm) of the vector
`boolean`	`notEqual(Vector2D b)`	Compares a and b for inequality.
`void`	`set(long i, double d)`
`long`	`size()`	The dimension of the vector (i.e.
`Vector2D`	`subtract(Vector2D b)`	Vector subtraction.
`Vector2D`	`subtractAssign(Vector2D v)`	Vector subtraction.
`java.lang.String`	`toString()`

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

- Constructor Detail
  - Vector2D
```
public Vector2D(long cPtr,
                boolean cMemoryOwn)
```
  - Vector2D
```
public Vector2D()
```
    Creates a 2D vector initialized with 0's
  - Vector2D
```
public Vector2D(double x,
                double y)
```
    Creates a 2D vector
    
    Parameters:
    
    x - [in] x
    
    y - [in] y
  - Vector2D
```
public Vector2D(Vector2D copy)
```
    Copy Constructor
- Method Detail
  - getCPtr
```
public static long getCPtr(Vector2D obj)
```
  - delete
```
public void delete()
```
  - e
```
public EigenVector2d e()
```
    Returns Eigen vector equivalent to *this.
  - size
```
public long size()
```
    The dimension of the vector (i.e. 2).
    
    This method is provided to help support generic algorithms using
    size() and operator[].
  - get
```
public double get(long i)
```
  - set
```
public void set(long i,
                double d)
```
  - divide
```
public Vector2D divide(double s)
```
    Scalar division.
  - multiply
```
public Vector2D multiply(double s)
```
    Scalar multiplication.
  - subtract
```
public Vector2D subtract(Vector2D b)
```
    Vector subtraction.
  - add
```
public Vector2D add(Vector2D b)
```
    Vector addition.
  - multiplyAssign
```
public Vector2D multiplyAssign(double s)
```
    Scalar multiplication.
  - devideAssign
```
public Vector2D devideAssign(double s)
```
    Scalar division.
  - addAssign
```
public Vector2D addAssign(Vector2D v)
```
    Vector addition.
  - subtractAssign
```
public Vector2D subtractAssign(Vector2D v)
```
    Vector subtraction.
  - negate
```
public Vector2D negate()
```
    Unary minus.
  - equals
```
public boolean equals(Vector2D b)
```
    Compares a and b for equality.
    
    Parameters:
    
    b - [in]
    
    Returns:
    
    True if a equals b, false otherwise.
  - notEqual
```
public boolean notEqual(Vector2D b)
```
    Compares a and b for inequality.
    
    Parameters:
    
    b - [in]
    
    Returns:
    
    True if a and b are different, false otherwise.
  - angle
```
public double angle()
```
    returns the counter clock-wise angle between
    this vector and the x-axis vector (1,0). The angle
    returned will be in the interval [-Pi,Pi]
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - norm2
```
public double norm2()
```
    Returns the Euclidean norm (2-norm) of the vector
    
    Returns:
    
    the norm
  - norm1
```
public double norm1()
```
    Returns the Manhatten norm (1-norm) of the vector
    
    Returns:
    
    the norm
  - normInf
```
public double normInf()
```
    Returns the infinte norm ( \inf-norm) of the vector
    
    Returns:
    
    the norm

Class Vector2D

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Vector2D

Vector2D

Vector2D

Vector2D

Method Detail

getCPtr

delete

e

size

get

set

divide

multiply

subtract

add

multiplyAssign

devideAssign

addAssign

subtractAssign

negate

equals

notEqual

angle

toString

norm2

norm1

normInf