Vector4 Class Reference

Vectors in four dimensions. More...

#include <evector4.h>

Public Member Functions
	Vector4 ()
	Empty.
	Vector4 (const double &, const double &, const double &, const double &)
	Create a vector given its four coordinates.
constexpr double &	operator[] (int)
	Access to a component.
constexpr double	operator[] (int) const
	Access to a component.
Vector4	operator- () const
	Overloaded.
QString	ToGLSL () const
	Return QString of the form 'vec4(x, y, z, w)' that write the vector in GLSL.

Protected Attributes
double	c [4] = { 0.0, 0.0, 0.0, 0.0 }
	Components.

Friends
Vector4	operator+ (const Vector4 &u, const Vector4 &v)
	Overloaded.
Vector4	operator- (const Vector4 &u, const Vector4 &v)
	Overloaded.
double	operator* (const Vector4 &u, const Vector4 &v)
	Compute the dot product of two vectors.
Vector4	operator* (const Vector4 &u, const double &a)
	Right multiply a vector by a scalar.
Vector4	operator* (const double &a, const Vector4 &u)
	Left multiply a vector by a scalar.
Vector4	operator/ (const Vector4 &u, const double &a)
	Divide a vector by a scalar.
Vector4	Sin (const Vector4 &u)
	Compute the sine of each component.
std::ostream &	operator<< (std::ostream &s, const Vector4 &u)
	Overloaded output-stream operator.

Detailed Description

Vectors in four dimensions.

This class is a simple container of four real components, used for linear algebra in \( R^4 \) (see Matrix4::operator*(const Vector4&)). It is not a homogeneous point: no division by the last component is ever performed.

Member Function Documentation

operator[]() [1/2]

double & Vector4::operator[] ( int i )

inlineconstexpr

Access to a component.

Parameters

i	Index, in [0,3].

operator[]() [2/2]

double Vector4::operator[] ( int i ) const

inlineconstexpr

Access to a component.

Parameters

i	Index, in [0,3].

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream & s, const Vector4 & u )

friend

Overloaded output-stream operator.

Parameters

u	Vector.
s	Stream.