b2Vec2 Struct Reference

A 2D column vector. More...

#include <b2_math.h>

Public Member Functions
	b2Vec2 ()
	Default constructor does nothing (for performance).
	b2Vec2 (float xIn, float yIn)
	Construct using coordinates.
void	SetZero ()
	Set this vector to all zeros.
void	Set (float x_, float y_)
	Set this vector to some specified coordinates.
b2Vec2	operator- () const
	Negate this vector.
float	operator() (int32 i) const
	Read from and indexed element.
float &	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*= (float a)
	Multiply this vector by a scalar.
float	Length () const
	Get the length of this vector (the norm).
float	LengthSquared () const
float	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
float	x
float	y

Detailed Description

A 2D column vector.

Member Function Documentation

LengthSquared()

float b2Vec2::LengthSquared ( ) const

inline

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

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

• include/box2d/b2_math.h