Vector math utility functions. More...

Functions
static float	dot (const sf::Vector2f &lv, const sf::Vector2f &rv)
	Calculates the dot product of 2 vectors.

static sf::Vector2f	normalise (sf::Vector2f source)
	Returns a given vector with its length normalized to 1.

static float	lengthSquared (const sf::Vector2f &source)
	Returns length of a vector squared. More...

static float	length (const sf::Vector2f &source)
	Returns length of a given vector. More...

static sf::Vector2f	reflect (const sf::Vector2f &velocity, const sf::Vector2f &normal)
	Reflects a velocity vector about a given normal.

static sf::Vector2f	rotate (const sf::Vector2f &v, float degrees)
	Rotates a vector (not very accurately) More...

static float	rotation (const sf::Vector2f v)
	Gets the rotation (in degrees) of a vector.

template<typename T >
static sf::Vector2< T >	vec2FromString (const std::string &str)
	Converts a comma delimited string to vector 2.

template<typename T >
sf::Vector2< T >	operator* (const sf::Vector2< T > &l, const sf::Vector2< T > &r)

Detailed Description

Vector math utility functions.

Function Documentation

static float xy::Util::Vector::length ( const sf::Vector2f & source )

inlinestatic

Returns length of a given vector.

If comparing the length of two vectors it is mroe efficient to use the squared lengths

static float xy::Util::Vector::lengthSquared ( const sf::Vector2f & source )

inlinestatic

Returns length of a vector squared.

When comparing the length of two vectors it is less expensive to compare the squared lengths, which will return the same result

static sf::Vector2f xy::Util::Vector::rotate	(	const sf::Vector2f &	v,
		float	degrees
	)

inlinestatic

Rotates a vector (not very accurately)

Parameters

v	Vector to rotate
degrees	Number of degrees to rotate vector