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QVector2D Class Reference
^{^{[QtGui module]}}

The QVector2D class represents a vector or vertex in 2D space. More...

Methods

__init__ (self)
__init__ (self, float xpos, float ypos)
__init__ (self, QPoint point)
__init__ (self, QPointF point)
__init__ (self, QVector3D vector)
__init__ (self, QVector4D vector)
__init__ (self, QVector2D)
bool isNull (self)
float length (self)
float lengthSquared (self)
normalize (self)
QVector2D normalized (self)
setX (self, float aX)
setY (self, float aY)
QPoint toPoint (self)
QPointF toPointF (self)
QVector3D toVector3D (self)
QVector4D toVector4D (self)
float x (self)
float y (self)

Static Methods

float dotProduct (QVector2D v1, QVector2D v2)

Special Methods

QVector2D __add__ (self, QVector2D v2)
QVector2D __div__ (self, float divisor)
bool __eq__ (self, QVector2D v2)
QVector2D __iadd__ (self, QVector2D vector)
QVector2D __idiv__ (self, float divisor)
QVector2D __imul__ (self, float factor)
QVector2D __imul__ (self, QVector2D vector)
QVector2D __isub__ (self, QVector2D vector)
QVector2D __mul__ (self, QVector2D vector)
QVector2D __mul__ (self, float factor)
QVector2D __mul__ (self, QVector2D v2)
bool __ne__ (self, QVector2D v2)
QVector2D __neg__ (self)
str __repr__ (self)
QVector2D __sub__ (self, QVector2D v2)

Detailed Description

This class can be pickled.

The QVector2D class represents a vector or vertex in 2D space.

The QVector2D class can also be used to represent vertices in 2D space. We therefore do not need to provide a separate vertex class.

Note: By design values in the QVector2D instance are stored as float. This means that on platforms where the qreal arguments to QVector2D functions are represented by double values, it is possible to lose precision.

Method Documentation

QVector2D.init (self)

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

QVector2D.init (self, float xpos, float ypos)

Constructs a vector with coordinates (xpos, ypos).

QVector2D.init (self, QPoint point)

Constructs a vector with x and y coordinates from a 2D point.

QVector2D.init (self, QPointF point)

Constructs a vector with x and y coordinates from a 2D point.

QVector2D.init (self, QVector3D vector)

Constructs a vector with x and y coordinates from a 3D vector. The z coordinate of vector is dropped.

See also toVector3D().

QVector2D.init (self, QVector4D vector)

Constructs a vector with x and y coordinates from a 3D vector. The z and w coordinates of vector are dropped.

See also toVector4D().

QVector2D.init (self, QVector2D)

float QVector2D.dotProduct (QVector2D v1, QVector2D v2)

Returns the dot product of v1 and v2.

QVector2D QVector2D.normalized (self)

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().