内容

• 特性
• 公共函数
• 公共槽
• 信号
• 静态公共成员
• 详细描述

QTransform 类

class Qt3DCore ::QTransform

Used to perform transforms on meshes. 更多...

头：	#include <QTransform>
qmake:	QT += 3dcore
Since:	Qt 5.6
实例化：	Transform
继承：	Qt3DCore::QComponent

该类在 Qt 5.6 引入。

• 所有成员列表，包括继承成员

特性

matrix : QMatrix4x4 rotation : QQuaternion rotationX : float rotationY : float rotationZ : float

scale : float scale3D : QVector3D translation : QVector3D worldMatrix : const QMatrix4x4

公共函数

	QTransform (Qt3DCore::QNode * parent = nullptr)
QMatrix4x4	matrix () const
QQuaternion	rotation () const
float	rotationX () const
float	rotationY () const
float	rotationZ () const
float	scale () const
QVector3D	scale3D () const
QVector3D	translation () const
QMatrix4x4	worldMatrix () const

公共槽

void	setMatrix (const QMatrix4x4 & matrix )
void	setRotation (const QQuaternion & rotation )
void	setRotationX (float rotationX )
void	setRotationY (float rotationY )
void	setRotationZ (float rotationZ )
void	setScale (float scale )
void	setScale3D (const QVector3D & scale )
void	setTranslation (const QVector3D & translation )

信号

void	matrixChanged ()
void	rotationChanged (const QQuaternion & rotation )
void	rotationXChanged (float rotationX )
void	rotationYChanged (float rotationY )
void	rotationZChanged (float rotationZ )
void	scale3DChanged (const QVector3D & scale )
void	scaleChanged (float scale )
void	translationChanged (const QVector3D & translation )
void	worldMatrixChanged (const QMatrix4x4 & worldMatrix )

静态公共成员

QQuaternion	fromAxes (const QVector3D & xAxis , const QVector3D & yAxis , const QVector3D & zAxis )
QQuaternion	fromAxesAndAngles (const QVector3D & axis1 , float angle1 , const QVector3D & axis2 , float angle2 )
QQuaternion	fromAxesAndAngles (const QVector3D & axis1 , float angle1 , const QVector3D & axis2 , float angle2 , const QVector3D & axis3 , float angle3 )
QQuaternion	fromAxisAndAngle (const QVector3D & axis , float angle )
QQuaternion	fromAxisAndAngle (float x , float y , float z , float angle )
QQuaternion	fromEulerAngles (const QVector3D & eulerAngles )
QQuaternion	fromEulerAngles (float pitch , float yaw , float roll )
QMatrix4x4	rotateAround (const QVector3D & point , float angle , const QVector3D & axis )
QMatrix4x4	rotateFromAxes (const QVector3D & xAxis , const QVector3D & yAxis , const QVector3D & zAxis )

详细描述

The QTransform component is not shareable between multiple QEntity 。变换的保持如 QVector3D 比例， QQuaternion 旋转和 QVector3D translation components. The transformations are applied to the mesh in that order. When QTransform::matrix property is set, it is decomposed to these transform components and corresponding signals are emitted.

Several helper functions are provided to set up the QTransform; fromAxisAndAngle and fromAxesAndAngles can be used to set the rotation around specific axes, fromEulerAngles can be used to set the rotation based on euler angles and rotateAround can be used to rotate the object around specific point relative to local origin.

特性文档编制

matrix : QMatrix4x4

保持 QMatrix4x4 of the transform.

注意： When the matrix property is set, it is decomposed to translation, rotation and scale components.

访问函数：

QMatrix4x4	matrix () const
void	setMatrix (const QMatrix4x4 & matrix )

通知程序信号：

void	matrixChanged ()

rotation : QQuaternion

Holds the rotation of the transform as QQuaternion .

访问函数：

QQuaternion	rotation () const
void	setRotation (const QQuaternion & rotation )

通知程序信号：

void	rotationChanged (const QQuaternion & rotation )

rotationX : float

Holds the x rotation of the transform as Euler angle.

访问函数：

float	rotationX () const
void	setRotationX (float rotationX )

通知程序信号：

void	rotationXChanged (float rotationX )

rotationY : float

Holds the y rotation of the transform as Euler angle.

访问函数：

float	rotationY () const
void	setRotationY (float rotationY )

通知程序信号：

void	rotationYChanged (float rotationY )

rotationZ : float

Holds the z rotation of the transform as Euler angle.

访问函数：

float	rotationZ () const
void	setRotationZ (float rotationZ )

通知程序信号：

void	rotationZChanged (float rotationZ )

scale : float

Holds the uniform scale of the transform. If the scale has been set with setScale3D , holds the x value only.

访问函数：

float	scale () const
void	setScale (float scale )

通知程序信号：

void	scaleChanged (float scale )

scale3D : QVector3D

Holds the scale of the transform as QVector3D .

访问函数：

QVector3D	scale3D () const
void	setScale3D (const QVector3D & scale )

通知程序信号：

void	scale3DChanged (const QVector3D & scale )

translation : QVector3D

Holds the translation of the transform as QVector3D .

访问函数：

QVector3D	translation () const
void	setTranslation (const QVector3D & translation )

通知程序信号：

void	translationChanged (const QVector3D & translation )

worldMatrix : const QMatrix4x4

Holds the world transformation matrix for the transform. This assumes the QTransform component is being referenced by a QEntity . This makes it more convenient to identify when a QEntity part of a subtree has been transformed in the world even though its local transformation might not have changed.

该特性在 Qt 5.14 引入。

访问函数：

QMatrix4x4

worldMatrix () const

通知程序信号：

void	worldMatrixChanged (const QMatrix4x4 & worldMatrix )

成员函数文档编制

QTransform:: QTransform ( Qt3DCore::QNode * parent = nullptr)

Constructs a new QTransform with parent .

[static] QQuaternion QTransform:: fromAxes (const QVector3D & xAxis , const QVector3D & yAxis , const QVector3D & zAxis )

Creates a QQuaterniom definining a rotation from the axes xAxis , yAxis and zAxis .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

该函数在 Qt 5.11 引入。

[static] QQuaternion QTransform:: fromAxesAndAngles (const QVector3D & axis1 , float angle1 , const QVector3D & axis2 , float angle2 )

创建 QQuaternion from axis1 , angle1 , axis2 ，和 angle2 . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QQuaternion QTransform:: fromAxesAndAngles (const QVector3D & axis1 , float angle1 , const QVector3D & axis2 , float angle2 , const QVector3D & axis3 , float angle3 )

创建 QQuaternion from axis1 , angle1 , axis2 , angle2 , axis3 ，和 angle3 . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QQuaternion QTransform:: fromAxisAndAngle (const QVector3D & axis , float angle )

创建 QQuaternion from axis and angle . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QQuaternion QTransform:: fromAxisAndAngle ( float x , float y , float z , float angle )

创建 QQuaternion from x , y , z ，和 angle . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QQuaternion QTransform:: fromEulerAngles (const QVector3D & eulerAngles )

创建 QQuaternion from eulerAngles . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QQuaternion QTransform:: fromEulerAngles ( float pitch , float yaw , float roll )

创建 QQuaternion from pitch , yaw ，和 roll . Returns the resulting QQuaternion .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QMatrix4x4 QTransform:: rotateAround (const QVector3D & point , float angle , const QVector3D & axis )

Creates a rotation matrix from axis and angle around point . Returns the resulting QMatrix4x4 .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

[static] QMatrix4x4 QTransform:: rotateFromAxes (const QVector3D & xAxis , const QVector3D & yAxis , const QVector3D & zAxis )

Returns a rotation matrix defined from the axes xAxis , yAxis , zAxis .

注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .

该函数在 Qt 5.11 引入。

QMatrix4x4 QTransform:: worldMatrix () const

Returns the world transformation matrix associated to the QTransform when referenced by a QEntity which may be part of a QEntity hierarchy.

注意： Getter function for property worldMatrix.

该函数在 Qt 5.14 引入。