gf::Vector< T, 4 > Struct Template Reference

A 4D vector. More...

#include <gf/Vector.h>

Public Member Functions
	Vector ()=default
	Default constructor. More...
	Vector (T val)
	Constructor that fills the vector with a value. More...
	Vector (T *array)
	Constructor that takes an array. More...
constexpr	Vector (T x, T y, T z, T w)
	Constructor that takes 4 components. More...
	Vector (const Vector &other)=default
	Default copy constructor. More...
template<typename U >
	Vector (const Vector< U, 4 > &other)
	Converting copy constructor. More...
T	operator[] (std::size_t i) const
	Access to the \( i \)-th coordinate. More...
T &	operator[] (std::size_t i)
	Access to the \( i \)-th coordinate. More...
T *	begin ()
	Iterator.to the first element. More...
T *	end ()
	Iterator to the element after the last one. More...
const T *	begin () const
	Iterator.to the first element (const version). More...
const T *	end () const
	Iterator on the element after the last one (const version). More...
const T *	cbegin () const
	Iterator.on the first element (const version). More...
const T *	cend () const
	Iterator on the element after the last one (const version). More...

Public Attributes
union gf::Vector< T, 4 >:: { ... }
T	data [4]
	Generic representation. More...
T	x
	First coordinate in the (x,y,z,w) representation. More...
T	y
	Second coordinate in the (x,y,z,w) representation. More...
T	z
	Third coordinate in the (x,y,z,w) representation. More...
T	w
	Fourth coordinate in the (x,y,z,w) representation. More...
T	r
	First coordinate in the (r,g,b,a) representation. More...
T	g
	Second coordinate in the (r,g,b,a) representation. More...
T	b
	Third coordinate in the (r,g,b,a) representation. More...
T	a
	Fourth coordinate in the (r,g,b,a) representation. More...
Vector< T, 2 >	xy
	Swizzle to get the first two coordinates as a 2D vector. More...
Vector< T, 3 >	xyz
	Swizzle to get the first three coordinates as a 3D vector. More...
Vector< T, 3 >	rgb
	Swizzle to get the first three coordinates as a RGB color. More...

Detailed Description

template<typename T>
struct gf::Vector< T, 4 >

A 4D vector.

This specialization of gf::Vector handles the 4-dimension spaces. It can be accessed with various representations:

• the generic representation with the data member
• the (x,y,z,w) representation, used for generic coordinates in the 4D space
• the (r,g,b,a) representation, used for RGBA colors

Several common typedef are defined:

• gf::Vector4i with int as T
• gf::Vector4u with unsigned as T
• gf::Vector4z with std::size_t as T
• gf::Vector4f with float as T
• gf::Vector4d with double as T
• gf::Vector4b with bool as T

For colors, some additional typedef are defined:

• gf::Color4f with float as T
• gf::Color4u with uint8_t as T

Usage example:

gf::Vector4f v1(98.0f, 75.0f, 23.0f);
v1.x = 57.0f;

gf::Vector4f v2 = v1 * 5.0f;
gf::Vector4f v3 = v1 + v2;

gf::Color4u opaqueGreen(0x00, 0xFF, 0x00, 0xFF);

Constructor & Destructor Documentation

Vector() [1/6]

template<typename T >

gf::Vector< T, 4 >::Vector ( )

default

Default constructor.

This constructor is defaulted so that this type is trivial.

Vector() [2/6]

template<typename T >

gf::Vector< T, 4 >::Vector ( T  val )

inlineexplicit

Constructor that fills the vector with a value.

This constructor takes a value and fills the entire vector with this value. Care must be taken when calling this constructor:

gf::Vector<int, 4> vecOK(42); // OK, vector is filled with 42
gf::Vector<int, 4> vecKO{42}; // KO, vector is initialized with a 42 in the first coordinate

Parameters

val	The value to fill the vector with

Vector() [3/6]

template<typename T >

gf::Vector< T, 4 >::Vector ( T *  array )

inlineexplicit

Constructor that takes an array.

This constructor can ease conversion from other math libraries. The array must contain enough data for 4 dimensions.

float array[4] = { 1.0f, -1.0f, 0.5f, 0.0f };
gf::Vector<float, 4> vec(array);

Parameters

array

An array with the values of the vector

Vector() [4/6]

template<typename T >

constexpr gf::Vector< T, 4 >::Vector ( T  x, T  y, T  z, T  w  )

inline

Constructor that takes 4 components.

Parameters

x	The first component
y	The second component
z	The third component
w	The fourth component

Vector() [5/6]

template<typename T >

gf::Vector< T, 4 >::Vector ( const Vector< T, 4 > &  other )

default

Default copy constructor.

This constructor is defaulted so that this type is trivial.

Parameters

other

The vector to copy from

Vector() [6/6]

template<typename T >

template<typename U >

gf::Vector< T, 4 >::Vector ( const Vector< U, 4 > &  other )

inline

Converting copy constructor.

Parameters

other

The vector to copy from

Member Function Documentation

begin() [1/2]

template<typename T >

T* gf::Vector< T, 4 >::begin ( )

inline

Iterator.to the first element.

Returns

A pointer to the first element.

begin() [2/2]

template<typename T >

const T* gf::Vector< T, 4 >::begin ( ) const

inline

Iterator.to the first element (const version).

Returns

A pointer on the first const element.

cbegin()

template<typename T >

const T* gf::Vector< T, 4 >::cbegin ( ) const

inline

Iterator.on the first element (const version).

Returns

A pointer on the first const element.

cend()

template<typename T >

const T* gf::Vector< T, 4 >::cend ( ) const

inline

Iterator on the element after the last one (const version).

Returns

An invalid pointer that is the adress after the last const element.

end() [1/2]

template<typename T >

T* gf::Vector< T, 4 >::end ( )

inline

Iterator to the element after the last one.

Returns

An invalid pointer that is the adress after the last element.

end() [2/2]

template<typename T >

const T* gf::Vector< T, 4 >::end ( ) const

inline

Iterator on the element after the last one (const version).

Returns

An invalid pointer that is the adress after the last const element.

operator[]() [1/2]

template<typename T >

T gf::Vector< T, 4 >::operator[] ( std::size_t  i ) const

inline

Access to the \( i \)-th coordinate.

gf::Vector<int, 4> vec = { 1, 3, 5, 7 };
std::printf("%i", vec[1]); // prints 3

Parameters

i	the coordinate number

Returns

The \( i \)-th coordinate of the vector

operator[]() [2/2]

template<typename T >

T& gf::Vector< T, 4 >::operator[] ( std::size_t  i )

inline

Access to the \( i \)-th coordinate.

gf::Vector<int, 5> vec;
vec[0] = vec[1] = vec[2] = vec[3] = vec[4] = 0;

Parameters

i	the coordinate number

Returns

The \( i \)-th coordinate of the vector

Member Data Documentation

@41

union { ... }

An anonymous union to handle the various representations

a

template<typename T >

T gf::Vector< T, 4 >::a

Fourth coordinate in the (r,g,b,a) representation.

See also

r, g, b

b

template<typename T >

T gf::Vector< T, 4 >::b

Third coordinate in the (r,g,b,a) representation.

See also

r, g, a

data

template<typename T >

T gf::Vector< T, 4 >::data[4]

Generic representation.

g

template<typename T >

T gf::Vector< T, 4 >::g

Second coordinate in the (r,g,b,a) representation.

See also

r, b, a

r

template<typename T >

T gf::Vector< T, 4 >::r

First coordinate in the (r,g,b,a) representation.

See also

g, b, a

rgb

template<typename T >

Vector<T, 3> gf::Vector< T, 4 >::rgb

Swizzle to get the first three coordinates as a RGB color.

w

template<typename T >

T gf::Vector< T, 4 >::w

Fourth coordinate in the (x,y,z,w) representation.

See also

x, y, z

x

template<typename T >

T gf::Vector< T, 4 >::x

First coordinate in the (x,y,z,w) representation.

See also

y, z, w

xy

template<typename T >

Vector<T, 2> gf::Vector< T, 4 >::xy

Swizzle to get the first two coordinates as a 2D vector.

xyz

template<typename T >

Vector<T, 3> gf::Vector< T, 4 >::xyz

Swizzle to get the first three coordinates as a 3D vector.

y

template<typename T >

T gf::Vector< T, 4 >::y

Second coordinate in the (x,y,z,w) representation.

See also

x, z, w

z

template<typename T >

T gf::Vector< T, 4 >::z

Third coordinate in the (x,y,z,w) representation.

See also

x, y, w