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

A 4D vector. More...

#include <gf/Vector.h>

Public Member Functions
	Vector ()=default
	Default constructor. More...
constexpr	Vector (ZeroType) noexcept
	Constructor that zero the vector out. More...
constexpr	Vector (T val) noexcept
	Constructor that fills the vector with a value. More...
constexpr	Vector (const T *array)
	Constructor that takes an array. More...
constexpr	Vector (T first, T second, T third, T fourth) noexcept
	Constructor that takes 4 components. More...
	Vector (const Vector &other)=default
	Default copy constructor. More...
template<typename U >
	Vector (const Vector< U, 4 > &other) noexcept
	Converting copy constructor. More...
Vector &	operator= (const Vector &other)=default
	Default copy assignment. More...
constexpr T	operator[] (std::size_t i) const
	Access to the \( i \)-th coordinate. More...
constexpr 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...
constexpr void	zero () noexcept
	Zero out the vector. More...
constexpr Vector< T, 2 >	xy () const
	Swizzle to get the first two coordinates as a 2D vector. More...
constexpr Vector< T, 3 >	xyz () const
	Swizzle to get the first three coordinates as a 3D vector. More...
constexpr Vector< T, 3 >	rgb () const
	Swizzle to get the first three coordinates as a RGB color. More...

Public Attributes
union gf::Vector< T, 4 >:: { ... }
union gf::Vector< T, 4 >:: { ... }
union gf::Vector< T, 4 >:: { ... }
union gf::Vector< T, 4 >:: { ... }
T	x
	First coordinate in the (x,y,z,w) representation. More...
T	r
	First coordinate in the (r,g,b,a) representation. More...
T	y
	Second coordinate in the (x,y,z,w) representation. More...
T	g
	Second coordinate in the (r,g,b,a) representation. More...
T	z
	Third coordinate in the (x,y,z,w) representation. More...
T	b
	Third coordinate in the (r,g,b,a) representation. More...
T	w
	Fourth coordinate in the (x,y,z,w) representation. More...
T	a
	Fourth coordinate in the (r,g,b,a) representation. 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 (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() [1/7]

template<typename T >

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

default

Default constructor.

This constructor is defaulted so that this type is trivial.

Vector() [2/7]

template<typename T >

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

inlineconstexprnoexcept

Constructor that zero the vector out.

Vector() [3/7]

template<typename T >

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

inlineexplicitconstexprnoexcept

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() [4/7]

template<typename T >

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

inlineexplicitconstexpr

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() [5/7]

template<typename T >

constexpr gf::Vector< T, 4 >::Vector ( T  first, T  second, T  third, T  fourth  )

inlineconstexprnoexcept

Constructor that takes 4 components.

Parameters

first	The first component
second	The second component
third	The third component
fourth	The fourth component

Vector() [6/7]

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() [7/7]

template<typename T >

template<typename U >

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

inlinenoexcept

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=()

template<typename T >

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

default

Default copy assignment.

This operator is defaulted so that this type is trivial.

operator[]() [1/2]

template<typename T >

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

inlineconstexpr

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

operator[]() [2/2]

template<typename T >

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

inlineconstexpr

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

rgb()

template<typename T >

constexpr Vector< T, 3 > gf::Vector< T, 4 >::rgb ( ) const

inlineconstexpr

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

xy()

template<typename T >

constexpr Vector< T, 2 > gf::Vector< T, 4 >::xy ( ) const

inlineconstexpr

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

xyz()

template<typename T >

constexpr Vector< T, 3 > gf::Vector< T, 4 >::xyz ( ) const

inlineconstexpr

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

zero()

template<typename T >

constexpr void gf::Vector< T, 4 >::zero ( )

inlineconstexprnoexcept

Zero out the vector.

Member Data Documentation

union gf::Vector< T, 4 > { ... } gf::Vector< T, 4 >::@77

An anonymous union to handle the first coordinate

union gf::Vector< T, 4 > { ... } gf::Vector< T, 4 >::@79

An anonymous union to handle the second coordinate

union gf::Vector< T, 4 > { ... } gf::Vector< T, 4 >::@81

An anonymous union to handle the third coordinate

union gf::Vector< T, 4 > { ... } gf::Vector< T, 4 >::@83

An anonymous union to handle the fourth coordinate

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

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

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

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