| Box2D 2.2.1 A 2D Physics Engine for Games

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b2Vec2 Struct Reference

A 2D column vector. More...

`#include <b2Math.h>`

List of all members.

## Public Member Functions

| b2Vec2 ()
| Default constructor does nothing (for performance).
| b2Vec2 (float32 x, float32 y)
| Construct using coordinates.
void | SetZero ()
| Set this vector to all zeros.
void | Set (float32 x_, float32 y_)
| Set this vector to some specified coordinates.
b2Vec2 | operator- () const
| Negate this vector.
float32 | operator() (int32 i) const
| Read from and indexed element.
float32 & | operator() (int32 i)
| Write to an indexed element.
void | operator+= (const b2Vec2 &v)
| Add a vector to this vector.
void | operator-= (const b2Vec2 &v)
| Subtract a vector from this vector.
void | operator*= (float32 a)
| Multiply this vector by a scalar.
float32 | Length () const
| Get the length of this vector (the norm).
float32 | LengthSquared () const
float32 | Normalize ()
| Convert this vector into a unit vector. Returns the length.
bool | IsValid () const
| Does this vector contain finite coordinates?
b2Vec2 | Skew () const
| Get the skew vector such that dot(skew_vec, other) == cross(vec, other)

## Public Attributes

float32 | x
float32 | y

## Detailed Description

A 2D column vector.

## Member Function Documentation

float32 b2Vec2::LengthSquared | ( |  | ) | const`[inline]`

Get the length squared. For performance, use this instead of b2Vec2::Length (if possible).

The documentation for this struct was generated from the following file:

- b2Math.h

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