QVector4D Class

The QVector4D class represents a vector or vertex in 4D space. More...

Header:	#include <QVector4D>
CMake:	find_package(Qt6 COMPONENTS Gui REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Gui)
qmake:	QT += gui

• List of all members, including inherited members

Public Functions

	QVector4D(QVector3D vector, float wpos)
	QVector4D(QVector3D vector)
	QVector4D(QVector2D vector, float zpos, float wpos)
	QVector4D(QVector2D vector)
	QVector4D(QPointF point)
	QVector4D(QPoint point)
	QVector4D(float xpos, float ypos, float zpos, float wpos)
	QVector4D()
bool	isNull() const
float	length() const
float	lengthSquared() const
void	normalize()
QVector4D	normalized() const
void	setW(float w)
void	setX(float x)
void	setY(float y)
void	setZ(float z)
QPoint	toPoint() const
QPointF	toPointF() const
QVector2D	toVector2D() const
QVector2D	toVector2DAffine() const
QVector3D	toVector3D() const
QVector3D	toVector3DAffine() const
float	w() const
float	x() const
float	y() const
float	z() const
QVariant	operator QVariant() const
QVector4D &	operator*=(float factor)
QVector4D &	operator*=(QVector4D vector)
QVector4D &	operator+=(QVector4D vector)
QVector4D &	operator-=(QVector4D vector)
QVector4D &	operator/=(float divisor)
QVector4D &	operator/=(QVector4D vector)
float &	operator[](int i)
float	operator[](int i) const

Static Public Members

float

dotProduct(QVector4D v1, QVector4D v2)

Related Non-Members

bool	qFuzzyCompare(QVector4D v1, QVector4D v2)
bool	operator!=(QVector4D v1, QVector4D v2)
QVector4D	operator*(float factor, QVector4D vector)
QVector4D	operator*(QVector4D vector, float factor)
QVector4D	operator*(QVector4D v1, QVector4D v2)
QVector4D	operator+(QVector4D v1, QVector4D v2)
QVector4D	operator-(QVector4D v1, QVector4D v2)
QVector4D	operator-(QVector4D vector)
QVector4D	operator/(QVector4D vector, float divisor)
QVector4D	operator/(QVector4D vector, QVector4D divisor)
QDataStream &	operator<<(QDataStream &stream, QVector4D vector)
bool	operator==(QVector4D v1, QVector4D v2)
QDataStream &	operator>>(QDataStream &stream, QVector4D &vector)

Detailed Description

The QVector4D class can also be used to represent vertices in 4D space. We therefore do not need to provide a separate vertex class.

See also QQuaternion, QVector2D, and QVector3D.

Member Function Documentation

QVector4D::QVector4D(QVector3D vector, float wpos)

Constructs a 4D vector from the specified 3D vector. The w coordinate is set to wpos.

See also toVector3D().

QVector4D::QVector4D(QVector3D vector)

Constructs a 4D vector from the specified 3D vector. The w coordinate is set to zero.

See also toVector3D().

QVector4D::QVector4D(QVector2D vector, float zpos, float wpos)

Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zpos and wpos respectively.

See also toVector2D().

QVector4D::QVector4D(QVector2D vector)

Constructs a 4D vector from the specified 2D vector. The z and w coordinates are set to zero.

See also toVector2D().

QVector4D::QVector4D(QPointF point)

Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.

QVector4D::QVector4D(QPoint point)

Constructs a vector with x and y coordinates from a 2D point, and z and w coordinates of 0.

QVector4D::QVector4D(float xpos, float ypos, float zpos, float wpos)

Constructs a vector with coordinates (xpos, ypos, zpos, wpos).

QVector4D::QVector4D()

Constructs a null vector, i.e. with coordinates (0, 0, 0, 0).

[static] float QVector4D::dotProduct(QVector4D v1, QVector4D v2)

Returns the dot product of v1 and v2.

bool QVector4D::isNull() const

Returns true if the x, y, z, and w coordinates are set to 0.0, otherwise returns false.

float QVector4D::length() const

Returns the length of the vector from the origin.

See also lengthSquared() and normalized().

float QVector4D::lengthSquared() const

Returns the squared length of the vector from the origin. This is equivalent to the dot product of the vector with itself.

See also length() and dotProduct().

void QVector4D::normalize()

Normalizes the currect vector in place. Nothing happens if this vector is a null vector or the length of the vector is very close to 1.

See also length() and normalized().

QVector4D QVector4D::normalized() const

Returns the normalized unit vector form of this vector.

If this vector is null, then a null vector is returned. If the length of the vector is very close to 1, then the vector will be returned as-is. Otherwise the normalized form of the vector of length 1 will be returned.

See also length() and normalize().

void QVector4D::setW(float w)

Sets the w coordinate of this point to the given w coordinate.

See also w(), setX(), setY(), and setZ().

void QVector4D::setX(float x)

Sets the x coordinate of this point to the given x coordinate.

See also x(), setY(), setZ(), and setW().

void QVector4D::setY(float y)

Sets the y coordinate of this point to the given y coordinate.

See also y(), setX(), setZ(), and setW().

void QVector4D::setZ(float z)

Sets the z coordinate of this point to the given z coordinate.

See also z(), setX(), setY(), and setW().

QPoint QVector4D::toPoint() const

Returns the QPoint form of this 4D vector. The z and w coordinates are dropped.

See also toPointF() and toVector2D().

QPointF QVector4D::toPointF() const

Returns the QPointF form of this 4D vector. The z and w coordinates are dropped.

See also toPoint() and toVector2D().

QVector2D QVector4D::toVector2D() const

Returns the 2D vector form of this 4D vector, dropping the z and w coordinates.

See also toVector2DAffine(), toVector3D(), and toPoint().

QVector2D QVector4D::toVector2DAffine() const

Returns the 2D vector form of this 4D vector, dividing the x and y coordinates by the w coordinate and dropping the z coordinate. Returns a null vector if w is zero.

See also toVector2D(), toVector3DAffine(), and toPoint().

QVector3D QVector4D::toVector3D() const

Returns the 3D vector form of this 4D vector, dropping the w coordinate.

See also toVector3DAffine(), toVector2D(), and toPoint().

QVector3D QVector4D::toVector3DAffine() const

Returns the 3D vector form of this 4D vector, dividing the x, y, and z coordinates by the w coordinate. Returns a null vector if w is zero.

See also toVector3D(), toVector2DAffine(), and toPoint().

float QVector4D::w() const

Returns the w coordinate of this point.

See also setW(), x(), y(), and z().

float QVector4D::x() const

Returns the x coordinate of this point.

See also setX(), y(), z(), and w().

float QVector4D::y() const

Returns the y coordinate of this point.

See also setY(), x(), z(), and w().

float QVector4D::z() const

Returns the z coordinate of this point.

See also setZ(), x(), y(), and w().

QVariant QVector4D::operator QVariant() const

Returns the 4D vector as a QVariant.

QVector4D &QVector4D::operator*=(float factor)

Multiplies this vector's coordinates by the given factor, and returns a reference to this vector.

See also operator/=().

QVector4D &QVector4D::operator*=(QVector4D vector)

Multiplies the components of this vector by the corresponding components in vector.

QVector4D &QVector4D::operator+=(QVector4D vector)

Adds the given vector to this vector and returns a reference to this vector.

See also operator-=().

QVector4D &QVector4D::operator-=(QVector4D vector)

Subtracts the given vector from this vector and returns a reference to this vector.

See also operator+=().

QVector4D &QVector4D::operator/=(float divisor)

Divides this vector's coordinates by the given divisor, and returns a reference to this vector.

See also operator*=().

[since 5.5] QVector4D &QVector4D::operator/=(QVector4D vector)

Divides the components of this vector by the corresponding components in vector.

This function was introduced in Qt 5.5.

See also operator*=().

[since 5.2] float &QVector4D::operator[](int i)

Returns the component of the vector at index position i as a modifiable reference.

i must be a valid index position in the vector (i.e., 0 <= i < 4).

This function was introduced in Qt 5.2.

[since 5.2] float QVector4D::operator[](int i) const

Returns the component of the vector at index position i.

i must be a valid index position in the vector (i.e., 0 <= i < 4).

This function was introduced in Qt 5.2.