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.
bool	IsValid () const
	Does this vector contain finite coordinates?
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.
float32	operator() (int32 i) const
	Read from and indexed element.
float32 &	operator() (int32 i)
	Write to an indexed element.
void	operator*= (float32 a)
	Multiply this vector by a scalar.
void	operator+= (const b2Vec2 &v)
	Add a vector to this vector.
b2Vec2	operator- () const
	Negate this vector.
void	operator-= (const b2Vec2 &v)
	Subtract a vector from this vector.
void	Set (float32 x_, float32 y_)
	Set this vector to some specified coordinates.
void	SetZero ()
	Set this vector to all zeros.
b2Vec2	Skew () const
	Get the skew vector such that dot(skew_vec, other) == cross(vec, other)
Public Attributes
float32	x
float32	y

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Detailed Description

A 2D column vector.

Definition at line 53 of file b2Math.h.

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Constructor & Destructor Documentation

b2Vec2::b2Vec2

(

)

[inline]

Default constructor does nothing (for performance).

Definition at line 56 of file b2Math.h.

b2Vec2::b2Vec2	(	float32	x,
		float32	y
	)		[inline]

Construct using coordinates.

Definition at line 59 of file b2Math.h.

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Member Function Documentation

bool b2Vec2::IsValid

(

)

const [inline]

Does this vector contain finite coordinates?

Definition at line 129 of file b2Math.h.

float32 b2Vec2::Length

(

)

const [inline]

Get the length of this vector (the norm).

Definition at line 101 of file b2Math.h.

float32 b2Vec2::LengthSquared

(

)

const [inline]

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

Definition at line 108 of file b2Math.h.

float32 b2Vec2::Normalize

(

)

[inline]

Convert this vector into a unit vector. Returns the length.

Definition at line 114 of file b2Math.h.

float32 b2Vec2::operator()

(

int32

i

)

const [inline]

Read from and indexed element.

Definition at line 71 of file b2Math.h.

float32& b2Vec2::operator()

(

int32

i

)

[inline]

Write to an indexed element.

Definition at line 77 of file b2Math.h.

void b2Vec2::operator*=

(

float32

a

)

[inline]

Multiply this vector by a scalar.

Definition at line 95 of file b2Math.h.

void b2Vec2::operator+=

(

const b2Vec2 &

v

)

[inline]

Add a vector to this vector.

Definition at line 83 of file b2Math.h.

b2Vec2 b2Vec2::operator-

(

)

const [inline]

Negate this vector.

Definition at line 68 of file b2Math.h.

void b2Vec2::operator-=

(

const b2Vec2 &

v

)

[inline]

Subtract a vector from this vector.

Definition at line 89 of file b2Math.h.

void b2Vec2::Set	(	float32	x_,
		float32	y_
	)		[inline]

Set this vector to some specified coordinates.

Definition at line 65 of file b2Math.h.

void b2Vec2::SetZero

(

)

[inline]

Set this vector to all zeros.

Definition at line 62 of file b2Math.h.

b2Vec2 b2Vec2::Skew

(

)

const [inline]

Get the skew vector such that dot(skew_vec, other) == cross(vec, other)

Definition at line 135 of file b2Math.h.

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Member Data Documentation

float32 b2Vec2::x

Definition at line 140 of file b2Math.h.

float32 b2Vec2::y

Definition at line 140 of file b2Math.h.

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

• b2Math.h