#include <Vector2.h>

Public Member Functions
	Vector2 ()
	Vector2 (float x, float y)
	Vector2 (const float *array)
	Vector2 (const Vector2 &p1, const Vector2 &p2)
	Vector2 (const Vector2 &copy)
	~Vector2 ()
bool	isZero () const
bool	isOne () const
void	add (const Vector2 &v)
void	clamp (const Vector2 &min, const Vector2 &max)
float	distance (const Vector2 &v) const
float	distanceSquared (const Vector2 &v) const
float	dot (const Vector2 &v) const
float	length () const
float	lengthSquared () const
void	negate ()
Vector2 &	normalize ()
void	normalize (Vector2 *dst) const
void	scale (float scalar)
void	scale (const Vector2 &scale)
void	rotate (const Vector2 &point, float angle)
void	set (float x, float y)
void	set (const float *array)
void	set (const Vector2 &v)
void	set (const Vector2 &p1, const Vector2 &p2)
void	subtract (const Vector2 &v)
void	smooth (const Vector2 &target, float elapsedTime, float responseTime)
const Vector2	operator+ (const Vector2 &v) const
Vector2 &	operator+= (const Vector2 &v)
const Vector2	operator- (const Vector2 &v) const
Vector2 &	operator-= (const Vector2 &v)
const Vector2	operator- () const
const Vector2	operator* (float x) const
Vector2 &	operator*= (float x)
const Vector2	operator/ (float x) const
bool	operator< (const Vector2 &v) const
bool	operator== (const Vector2 &v) const
bool	operator!= (const Vector2 &v) const
Static Public Member Functions
static const Vector2 &	zero ()
static const Vector2 &	one ()
static const Vector2 &	unitX ()
static const Vector2 &	unitY ()
static float	angle (const Vector2 &v1, const Vector2 &v2)
static void	add (const Vector2 &v1, const Vector2 &v2, Vector2 *dst)
static void	clamp (const Vector2 &v, const Vector2 &min, const Vector2 &max, Vector2 *dst)
static float	dot (const Vector2 &v1, const Vector2 &v2)
static void	subtract (const Vector2 &v1, const Vector2 &v2, Vector2 *dst)
Public Attributes
float	x
float	y

Detailed Description

Defines a 2-element floating point vector.

Constructor & Destructor Documentation

gameplay::Vector2::Vector2 ( )

Constructs a new vector initialized to all zeros.

gameplay::Vector2::Vector2	(	float	x,
		float	y
	)

Constructs a new vector initialized to the specified values.

Parameters:

x	The x coordinate.
y	The y coordinate.

gameplay::Vector2::Vector2 ( const float * array )

Constructs a new vector from the values in the specified array.

Parameters:

array An array containing the elements of the vector in the order x, y.

gameplay::Vector2::Vector2	(	const Vector2 &	p1,
		const Vector2 &	p2
	)

Constructs a vector that describes the direction between the specified points.

Parameters:

p1	The first point.
p2	The second point.

gameplay::Vector2::Vector2 ( const Vector2 & copy )

Constructs a new vector that is a copy of the specified vector.

Parameters:

copy	The vector to copy.

gameplay::Vector2::~Vector2 ( )

Destructor.

Member Function Documentation

void gameplay::Vector2::add ( const Vector2 & v )

Adds the elements of the specified vector to this one.

Parameters:

v	The vector to add.

static void gameplay::Vector2::add	(	const Vector2 &	v1,
		const Vector2 &	v2,
		Vector2 *	dst
	)		`[static]`

Adds the specified vectors and stores the result in dst.

Parameters:

v1	The first vector.
v2	The second vector.
dst	A vector to store the result in.

static float gameplay::Vector2::angle	(	const Vector2 &	v1,
		const Vector2 &	v2
	)		`[static]`

Returns the angle (in radians) between the specified vectors.

Parameters:

v1	The first vector.
v2	The second vector.

Returns:: The angle between the two vectors (in radians).

void gameplay::Vector2::clamp	(	const Vector2 &	min,
		const Vector2 &	max
	)

Clamps this vector within the specified range.

Parameters:

min	The minimum value.
max	The maximum value.

static void gameplay::Vector2::clamp	(	const Vector2 &	v,
		const Vector2 &	min,
		const Vector2 &	max,
		Vector2 *	dst
	)		`[static]`

Clamps the specified vector within the specified range and returns it in dst.

Parameters:

v	The vector to clamp.
min	The minimum value.
max	The maximum value.
dst	A vector to store the result in.

float gameplay::Vector2::distance ( const Vector2 & v ) const

Returns the distance between this vector and v.

Parameters:

v	The other vector.

Returns:: The distance between this vector and v.

See also:: distanceSquared

float gameplay::Vector2::distanceSquared ( const Vector2 & v ) const

Returns the squared distance between this vector and v.

When it is not necessary to get the exact distance between two vectors (for example, when simply comparing the distance between different vectors), it is advised to use this method instead of distance.

Parameters:

v	The other vector.

Returns:: The squared distance between this vector and v.

See also:: distance

float gameplay::Vector2::dot ( const Vector2 & v ) const

Returns the dot product of this vector and the specified vector.

Parameters:

v	The vector to compute the dot product with.

Returns:: The dot product.

static float gameplay::Vector2::dot	(	const Vector2 &	v1,
		const Vector2 &	v2
	)		`[static]`

Returns the dot product between the specified vectors.

Parameters:

v1	The first vector.
v2	The second vector.

Returns:: The dot product between the vectors.

bool gameplay::Vector2::isOne ( ) const

Indicates whether this vector contains all ones.

Returns:: true if this vector contains all ones, false otherwise.

bool gameplay::Vector2::isZero ( ) const

Indicates whether this vector contains all zeros.

Returns:: true if this vector contains all zeros, false otherwise.

float gameplay::Vector2::length ( ) const

Computes the length of this vector.

Returns:: The length of the vector.

See also:: lengthSquared

float gameplay::Vector2::lengthSquared ( ) const

Returns the squared length of this vector.

When it is not necessary to get the exact length of a vector (for example, when simply comparing the lengths of different vectors), it is advised to use this method instead of length.

Returns:: The squared length of the vector.

See also:: length

void gameplay::Vector2::negate ( )

Negates this vector.

Vector2& gameplay::Vector2::normalize ( )

Normalizes this vector.

This method normalizes this Vector2 so that it is of unit length (in other words, the length of the vector after calling this method will be 1.0f). If the vector already has unit length or if the length of the vector is zero, this method does nothing.

Returns:: This vector, after the normalization occurs.

void gameplay::Vector2::normalize ( Vector2 * dst ) const

Normalizes this vector and stores the result in dst.

If the vector already has unit length or if the length of the vector is zero, this method simply copies the current vector into dst.

Parameters:

dst	The destination vector.

static const Vector2& gameplay::Vector2::one ( ) [static]

Returns the one vector.

Returns:: The 2-element vector of 1s.

bool gameplay::Vector2::operator!= ( const Vector2 & v ) const [inline]

Determines if this vector is not equal to the given vector.

Parameters:

v	The vector to compare against.

Returns:: True if this vector is not equal to the given vector, false otherwise.

const Vector2 gameplay::Vector2::operator* ( float x ) const [inline]

Calculates the scalar product of this vector with the given value.

Note: this does not modify this vector.

Parameters:

x	The value to scale by.

Returns:: The scaled vector.

Vector2& gameplay::Vector2::operator*= ( float x ) [inline]

Scales this vector by the given value.

Parameters:

x	The value to scale by.

Returns:: This vector, after the scale occurs.

const Vector2 gameplay::Vector2::operator+ ( const Vector2 & v ) const [inline]

Calculates the sum of this vector with the given vector.

Note: this does not modify this vector.

Parameters:

v	The vector to add.

Returns:: The vector sum.

Vector2& gameplay::Vector2::operator+= ( const Vector2 & v ) [inline]

Adds the given vector to this vector.

Parameters:

v	The vector to add.

Returns:: This vector, after the addition occurs.

const Vector2 gameplay::Vector2::operator- ( const Vector2 & v ) const [inline]

Calculates the sum of this vector with the given vector.

Note: this does not modify this vector.

Parameters:

v	The vector to add.

Returns:: The vector sum.

const Vector2 gameplay::Vector2::operator- ( ) const [inline]

Calculates the negation of this vector.

Note: this does not modify this vector.

Returns:: The negation of this vector.

Vector2& gameplay::Vector2::operator-= ( const Vector2 & v ) [inline]

Subtracts the given vector from this vector.

Parameters:

v	The vector to subtract.

Returns:: This vector, after the subtraction occurs.

const Vector2 gameplay::Vector2::operator/ ( float x ) const [inline]

Returns the components of this vector divided by the given constant

Note: this does not modify this vector.

Parameters:

x	the constant to divide this vector with

Returns:: a smaller vector

bool gameplay::Vector2::operator< ( const Vector2 & v ) const [inline]

Determines if this vector is less than the given vector.

Parameters:

v	The vector to compare against.

Returns:: True if this vector is less than the given vector, false otherwise.

bool gameplay::Vector2::operator== ( const Vector2 & v ) const [inline]

Determines if this vector is equal to the given vector.

Parameters:

v	The vector to compare against.

Returns:: True if this vector is equal to the given vector, false otherwise.

void gameplay::Vector2::rotate	(	const Vector2 &	point,
		float	angle
	)

Rotates this vector by angle (specified in radians) around the given point.

Parameters:

point	The point to rotate around.
angle	The angle to rotate by (in radians).

void gameplay::Vector2::scale ( float scalar )

Scales all elements of this vector by the specified value.

Parameters:

scalar The scalar value.

void gameplay::Vector2::scale ( const Vector2 & scale )

Scales each element of this vector by the matching component of scale.

Parameters:

scale The vector to scale by.

void gameplay::Vector2::set	(	float	x,
		float	y
	)

Sets the elements of this vector to the specified values.

Parameters:

x	The new x coordinate.
y	The new y coordinate.

void gameplay::Vector2::set ( const float * array )

Sets the elements of this vector from the values in the specified array.

Parameters:

array An array containing the elements of the vector in the order x, y.

void gameplay::Vector2::set ( const Vector2 & v )

Sets the elements of this vector to those in the specified vector.

Parameters:

v	The vector to copy.

void gameplay::Vector2::set	(	const Vector2 &	p1,
		const Vector2 &	p2
	)

Sets this vector to the directional vector between the specified points.

Parameters:

p1	The first point.
p2	The second point.

void gameplay::Vector2::smooth	(	const Vector2 &	target,
		float	elapsedTime,
		float	responseTime
	)

Updates this vector towards the given target using a smoothing function. The given response time determines the amount of smoothing (lag). A longer response time yields a smoother result and more lag. To force this vector to follow the target closely, provide a response time that is very small relative to the given elapsed time.

Parameters:

target	target value.
elapsedTime	elapsed time between calls.
responseTime	response time (in the same units as elapsedTime).

void gameplay::Vector2::subtract ( const Vector2 & v )

Subtracts this vector and the specified vector as (this - v) and stores the result in this vector.

Parameters:

v	The vector to subtract.

static void gameplay::Vector2::subtract	(	const Vector2 &	v1,
		const Vector2 &	v2,
		Vector2 *	dst
	)		`[static]`

Subtracts the specified vectors and stores the result in dst. The resulting vector is computed as (v1 - v2).

Parameters:

v1	The first vector.
v2	The second vector.
dst	The destination vector.

static const Vector2& gameplay::Vector2::unitX ( ) [static]

Returns the unit x vector.

Returns:: The 2-element unit vector along the x axis.

static const Vector2& gameplay::Vector2::unitY ( ) [static]

Returns the unit y vector.

Returns:: The 2-element unit vector along the y axis.

static const Vector2& gameplay::Vector2::zero ( ) [static]

Returns the zero vector.

Returns:: The 2-element vector of 0s.

Member Data Documentation

float gameplay::Vector2::x

The x coordinate.

float gameplay::Vector2::y

The y coordinate.

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation