QVector3D ¶

概要 ¶

详细描述 ¶

Vectors are one of the main building blocks of 3D representation and drawing. They consist of three coordinates, traditionally called x, y, and z.

QVector3D class can also be used to represent vertices in 3D space. We therefore do not need to provide a separate vertex class.

另请参阅

QVector2D QVector4D QQuaternion

class QVector3D ¶

QVector3D(point)

QVector3D(point)

QVector3D(vector)

QVector3D(vector, zpos)

QVector3D(vector)

QVector3D(xpos, ypos, zpos)

param ypos

float

param point

QPoint

param zpos

float

param vector

QVector2D

param xpos

float

构造 null 向量，即：采用坐标 (0, 0, 0)。

构造 3D 向量从指定 2D vector 。z 坐标被设为 zpos .

另请参阅

toVector2D()

构造向量采用坐标 ( xpos , ypos , zpos ).

PySide2.QtGui.QVector3D. __reduce__ ( ) ¶

返回类型

PyObject

PySide2.QtGui.QVector3D. __repr__ ( ) ¶

返回类型

PyObject

static PySide2.QtGui.QVector3D. crossProduct ( v1 , v2 ) ¶

参数

• v1 – QVector3D

• v2 – QVector3D

返回类型

QVector3D

Returns the cross-product of vectors v1 and v2 , which corresponds to the normal vector of a plane defined by v1 and v2 .

另请参阅

normal()

PySide2.QtGui.QVector3D. distanceToLine ( point , direction ) ¶

参数

• point – QVector3D

• direction – QVector3D

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

distanceToPlane()

PySide2.QtGui.QVector3D. distanceToPlane ( plane , normal ) ¶

参数

• plane – QVector3D

• normal – QVector3D

返回类型

float

Returns the distance from this vertex to a plane defined by the vertex plane 和 normal unit vector. The normal parameter is assumed to have been normalized to a unit vector.

The return value will be negative if the vertex is below the plane, or zero if it is on the plane.

另请参阅

normal() distanceToLine()

PySide2.QtGui.QVector3D. distanceToPlane ( plane1 , plane2 , plane3 ) ¶

参数

• plane1 – QVector3D

• plane2 – QVector3D

• plane3 – QVector3D

返回类型

float

这是重载函数。

Returns the distance from this vertex to a plane defined by the vertices plane1 , plane2 and plane3 .

The return value will be negative if the vertex is below the plane, or zero if it is on the plane.

The two vectors that define the plane are plane2 - plane1 and plane3 - plane1 .

另请参阅

normal() distanceToLine()

PySide2.QtGui.QVector3D. distanceToPoint ( point ) ¶

参数

point – QVector3D

返回类型

float

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

另请参阅

distanceToPlane() distanceToLine()

static PySide2.QtGui.QVector3D. dotProduct ( v1 , v2 ) ¶

参数

• v1 – QVector3D

• v2 – QVector3D

返回类型

float

Returns the dot product of v1 and v2 .

PySide2.QtGui.QVector3D. isNull ( ) ¶

返回类型

bool

返回 true 若 x、y 和 z 坐标被设为 0.0，否则返回 false .

PySide2.QtGui.QVector3D. length ( ) ¶

返回类型

float

从原点返回向量长度。

另请参阅

lengthSquared() normalized()

PySide2.QtGui.QVector3D. 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()

static PySide2.QtGui.QVector3D. normal ( v1 , v2 ) ¶

参数

• v1 – QVector3D

• v2 – QVector3D

返回类型

QVector3D

Returns the normal vector of a plane defined by vectors v1 and v2 , normalized to be a unit vector.

使用 crossProduct() to compute the cross-product of v1 and v2 if you do not need the result to be normalized to a unit vector.

另请参阅

crossProduct() distanceToPlane()

static PySide2.QtGui.QVector3D. normal ( v1 , v2 , v3 ) ¶

参数

• v1 – QVector3D

• v2 – QVector3D

• v3 – QVector3D

返回类型

QVector3D

这是重载函数。

Returns the normal vector of a plane defined by vectors v2 - v1 and v3 - v1 , normalized to be a unit vector.

使用 crossProduct() to compute the cross-product of v2 - v1 and v3 - v1 if you do not need the result to be normalized to a unit vector.

另请参阅

crossProduct() distanceToPlane()

PySide2.QtGui.QVector3D. 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.QVector3D. normalized ( ) ¶

返回类型

QVector3D

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.QVector3D. __ne__ ( v2 ) ¶

参数

v2 – QVector3D

返回类型

bool

PySide2.QtGui.QVector3D. __mul__ ( factor ) ¶

参数

factor – float

返回类型

QVector3D

PySide2.QtGui.QVector3D. __mul__ ( factor ) ¶

参数

factor – float

返回类型

QVector3D

PySide2.QtGui.QVector3D. __mul__ ( v2 ) ¶

参数

v2 – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __mul__ ( matrix ) ¶

参数

matrix – QMatrix4x4

返回类型

QVector3D

PySide2.QtGui.QVector3D. __mul__ ( matrix ) ¶

参数

matrix – QMatrix4x4

返回类型

QVector3D

PySide2.QtGui.QVector3D. __mul__ ( quaternion ) ¶

参数

quaternion – QQuaternion

返回类型

QVector3D

PySide2.QtGui.QVector3D. __imul__ ( vector ) ¶

参数

vector – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __imul__ ( factor ) ¶

参数

factor – float

返回类型

QVector3D

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

另请参阅

operator/=()

PySide2.QtGui.QVector3D. __add__ ( v2 ) ¶

参数

v2 – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __iadd__ ( vector ) ¶

参数

vector – QVector3D

返回类型

QVector3D

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

另请参阅

operator-=()

PySide2.QtGui.QVector3D. __sub__ ( ) ¶

返回类型

QVector3D

PySide2.QtGui.QVector3D. __sub__ ( v2 ) ¶

参数

v2 – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __isub__ ( vector ) ¶

参数

vector – QVector3D

返回类型

QVector3D

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

另请参阅

operator+=()

PySide2.QtGui.QVector3D. __div__ ( divisor ) ¶

参数

divisor – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __div__ ( divisor ) ¶

参数

divisor – float

返回类型

QVector3D

PySide2.QtGui.QVector3D. __idiv__ ( vector ) ¶

参数

vector – QVector3D

返回类型

QVector3D

PySide2.QtGui.QVector3D. __idiv__ ( divisor ) ¶

参数

divisor – float

返回类型

QVector3D

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

另请参阅

operator*=()

PySide2.QtGui.QVector3D. __eq__ ( v2 ) ¶

参数

v2 – QVector3D

返回类型

bool

PySide2.QtGui.QVector3D.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 < 3).

PySide2.QtGui.QVector3D. project ( modelView , projection , 视口 ) ¶

参数

• modelView – QMatrix4x4

• projection – QMatrix4x4

• 视口 – QRect

返回类型

QVector3D

Returns the window coordinates of this vector initially in object/model coordinates using the model view matrix modelView , the projection matrix projection and the viewport dimensions 视口 .

When transforming from clip to normalized space, a division by the w component on the vector components takes place. To prevent dividing by 0 if w equals to 0, it is set to 1.

注意

the returned y coordinates are in OpenGL orientation. OpenGL expects the bottom to be 0 whereas for Qt top is 0.

另请参阅

unproject()

PySide2.QtGui.QVector3D. 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() setZ()

PySide2.QtGui.QVector3D. 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() setZ()

PySide2.QtGui.QVector3D. setZ ( z ) ¶

参数

z – float

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

另请参阅

z() setX() setY()

PySide2.QtGui.QVector3D. toPoint ( ) ¶

返回类型

QPoint

返回 QPoint form of this 3D vector. The z coordinate is dropped.

另请参阅

toPointF() toVector2D()

PySide2.QtGui.QVector3D. toPointF ( ) ¶

返回类型

QPointF

返回 QPointF form of this 3D vector. The z coordinate is dropped.

另请参阅

toPoint() toVector2D()

PySide2.QtGui.QVector3D. toTuple ( ) ¶

返回类型

PyObject

PySide2.QtGui.QVector3D. toVector2D ( ) ¶

返回类型

QVector2D

Returns the 2D vector form of this 3D vector, dropping the z coordinate.

另请参阅

toVector4D() toPoint()

PySide2.QtGui.QVector3D. toVector4D ( ) ¶

返回类型

QVector4D

Returns the 4D form of this 3D vector, with the w coordinate set to zero.

另请参阅

toVector2D() toPoint()

PySide2.QtGui.QVector3D. unproject ( modelView , projection , 视口 ) ¶

参数

• modelView – QMatrix4x4

• projection – QMatrix4x4

• 视口 – QRect

返回类型

QVector3D

Returns the object/model coordinates of this vector initially in window coordinates using the model view matrix modelView , the projection matrix projection and the viewport dimensions 视口 .

When transforming from clip to normalized space, a division by the w component of the vector components takes place. To prevent dividing by 0 if w equals to 0, it is set to 1.

注意

y coordinates in 视口 should use OpenGL orientation. OpenGL expects the bottom to be 0 whereas for Qt top is 0.

另请参阅

project()

PySide2.QtGui.QVector3D. x ( ) ¶

返回类型

float

返回此点的 x 坐标。

另请参阅

setX() y() z()

PySide2.QtGui.QVector3D. y ( ) ¶

返回类型

float

返回此点的 y 坐标。

另请参阅

setY() x() z()

PySide2.QtGui.QVector3D. z ( ) ¶

返回类型

float

返回此点的 z 坐标。

另请参阅

setZ() x() y()