QVector2D ¶

概要 ¶

详细描述 ¶

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

另请参阅

QVector3D QVector4D QQuaternion

class QVector2D ¶

QVector2D(point)

QVector2D(point)

QVector2D(vector)

QVector2D(vector)

QVector2D(xpos, ypos)

param ypos

float

param point

QPoint

param vector

QVector3D

param xpos

float

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

构造向量采用坐标 ( xpos , ypos ).

PySide2.QtGui.QVector2D. __reduce__ ( ) ¶

返回类型

PyObject

PySide2.QtGui.QVector2D. __repr__ ( ) ¶

返回类型

PyObject

PySide2.QtGui.QVector2D. distanceToLine ( point , direction ) ¶

参数

• point – QVector2D

• direction – QVector2D

返回类型

float

Returns the distance that this vertex is from a line defined by point and the unit vector direction .

若 direction is a null vector, then it does not define a line. In that case, the distance from point to this vertex is returned.

另请参阅

distanceToPoint()

PySide2.QtGui.QVector2D. distanceToPoint ( point ) ¶

参数

point – QVector2D

返回类型

float

Returns the distance from this vertex to a point defined by the vertex point .

另请参阅

distanceToLine()

static PySide2.QtGui.QVector2D. dotProduct ( v1 , v2 ) ¶

参数

• v1 – QVector2D

• v2 – QVector2D

返回类型

float

Returns the dot product of v1 and v2 .

PySide2.QtGui.QVector2D. isNull ( ) ¶

返回类型

bool

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

PySide2.QtGui.QVector2D. length ( ) ¶

返回类型

float

从原点返回向量长度。

另请参阅

lengthSquared() normalized()

PySide2.QtGui.QVector2D. lengthSquared ( ) ¶

返回类型

float

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

另请参阅

length() dotProduct()

PySide2.QtGui.QVector2D. 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.

另请参阅

length() normalized()

PySide2.QtGui.QVector2D. normalized ( ) ¶

返回类型

QVector2D

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.

另请参阅

length() normalize()

PySide2.QtGui.QVector2D. __ne__ ( v2 ) ¶

参数

v2 – QVector2D

返回类型

bool

PySide2.QtGui.QVector2D. __mul__ ( v2 ) ¶

参数

v2 – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __mul__ ( factor ) ¶

参数

factor – float

返回类型

QVector2D

PySide2.QtGui.QVector2D. __mul__ ( factor ) ¶

参数

factor – float

返回类型

QVector2D

PySide2.QtGui.QVector2D. __imul__ ( factor ) ¶

参数

factor – float

返回类型

QVector2D

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

另请参阅

operator/=()

PySide2.QtGui.QVector2D. __imul__ ( vector ) ¶

参数

vector – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __add__ ( v2 ) ¶

参数

v2 – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __iadd__ ( vector ) ¶

参数

vector – QVector2D

返回类型

QVector2D

添加给定 vector to this vector and returns a reference to this vector.

另请参阅

operator-=()

PySide2.QtGui.QVector2D. __sub__ ( ) ¶

返回类型

QVector2D

PySide2.QtGui.QVector2D. __sub__ ( v2 ) ¶

参数

v2 – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __isub__ ( vector ) ¶

参数

vector – QVector2D

返回类型

QVector2D

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

另请参阅

operator+=()

PySide2.QtGui.QVector2D. __div__ ( divisor ) ¶

参数

divisor – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __div__ ( divisor ) ¶

参数

divisor – float

返回类型

QVector2D

PySide2.QtGui.QVector2D. __idiv__ ( vector ) ¶

参数

vector – QVector2D

返回类型

QVector2D

PySide2.QtGui.QVector2D. __idiv__ ( divisor ) ¶

参数

divisor – float

返回类型

QVector2D

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

另请参阅

operator*=()

PySide2.QtGui.QVector2D. __eq__ ( v2 ) ¶

参数

v2 – QVector2D

返回类型

bool

PySide2.QtGui.QVector2D.operator[](i)

参数

i – int

返回类型

float

Returns the component of the vector at index position i .

i must be a valid index position in the vector (i.e., 0 <= i < 2).

PySide2.QtGui.QVector2D. setX ( x ) ¶

参数

x – float

Sets the x coordinate of this point to the given x 坐标。

另请参阅

x() setY()

PySide2.QtGui.QVector2D. setY ( y ) ¶

参数

y – float

Sets the y coordinate of this point to the given y 坐标。

另请参阅

y() setX()

PySide2.QtGui.QVector2D. toPoint ( ) ¶

返回类型

QPoint

返回 QPoint form of this 2D vector.

另请参阅

toPointF() toVector3D()

PySide2.QtGui.QVector2D. toPointF ( ) ¶

返回类型

QPointF

返回 QPointF form of this 2D vector.

另请参阅

toPoint() toVector3D()

PySide2.QtGui.QVector2D. toTuple ( ) ¶

返回类型

PyObject

PySide2.QtGui.QVector2D. toVector3D ( ) ¶

返回类型

QVector3D

Returns the 3D form of this 2D vector, with the z coordinate set to zero.

另请参阅

toVector4D() toPoint()

PySide2.QtGui.QVector2D. toVector4D ( ) ¶

返回类型

QVector4D

Returns the 4D form of this 2D vector, with the z and w coordinates set to zero.

另请参阅

toVector3D() toPoint()

PySide2.QtGui.QVector2D. x ( ) ¶

返回类型

float

返回此点的 x 坐标。

另请参阅

setX() y()

PySide2.QtGui.QVector2D. y ( ) ¶

返回类型

float

返回此点的 y 坐标。

另请参阅

setY() x()