内容

• 公共类型
• 特性
• 公共函数
• 公共槽
• 信号
• 保护函数
• 详细描述

QCameraLens Class

( Qt3DRender::QCameraLens )

Qt3DRender::QCameraLens specifies the projection matrix that will be used to define a Camera for a 3D scene. 更多...

头：	#include <Qt3DRender/QCameraLens>
qmake:	QT += 3drender
Since:	Qt 5.5
实例化：	CameraLens
继承：	Qt3DCore::QComponent

• 所有成员列表，包括继承成员

公共类型

enum	ProjectionType { OrthographicProjection, PerspectiveProjection, FrustumProjection, CustomProjection }

特性

aspectRatio : float bottom : float exposure : float farPlane : float fieldOfView : float left : float

nearPlane : float projectionMatrix : QMatrix4x4 projectionType : ProjectionType right : float top : float

• 1 特性继承自 Qt3DCore::QComponent
• 3 特性继承自 Qt3DCore::QNode
• 1 特性继承自 QObject

公共函数

	QCameraLens (QNode * parent = nullptr)
float	aspectRatio () const
float	bottom () const
float	exposure () const
float	farPlane () const
float	fieldOfView () const
float	left () const
float	nearPlane () const
QMatrix4x4	projectionMatrix () const
ProjectionType	projectionType () const
float	right () const
void	setFrustumProjection (float left , float right , float bottom , float top , float nearPlane , float farPlane )
void	setOrthographicProjection (float left , float right , float bottom , float top , float nearPlane , float farPlane )
void	setPerspectiveProjection (float fieldOfView , float aspectRatio , float nearPlane , float farPlane )
float	top () const

• 2 公共函数继承自 Qt3DCore::QComponent
• 11 公共函数继承自 Qt3DCore::QNode
• 32 公共函数继承自 QObject

公共槽

void	setAspectRatio (float aspectRatio )
void	setBottom (float bottom )
void	setExposure (float exposure )
void	setFarPlane (float farPlane )
void	setFieldOfView (float fieldOfView )
void	setLeft (float left )
void	setNearPlane (float nearPlane )
void	setProjectionMatrix (const QMatrix4x4 & projectionMatrix )
void	setProjectionType (ProjectionType projectionType )
void	setRight (float right )
void	setTop (float top )

• 1 公共槽继承自 Qt3DCore::QComponent
• 3 公共槽继承自 Qt3DCore::QNode
• 1 公共槽继承自 QObject

信号

void	aspectRatioChanged (float aspectRatio )
void	bottomChanged (float bottom )
void	exposureChanged (float exposure )
void	farPlaneChanged (float farPlane )
void	fieldOfViewChanged (float fieldOfView )
void	leftChanged (float left )
void	nearPlaneChanged (float nearPlane )
void	projectionMatrixChanged (const QMatrix4x4 & projectionMatrix )
void	projectionTypeChanged (QCameraLens::ProjectionType projectionType )
void	rightChanged (float right )
void	topChanged (float top )

• 3 信号继承自 Qt3DCore::QComponent
• 4 信号继承自 Qt3DCore::QNode
• 2 信号继承自 QObject

保护函数

QCameraLens (QCameraLensPrivate & dd , QNode * parent = nullptr)

• 2 保护函数继承自 Qt3DCore::QNode
• 9 保护函数继承自 QObject

额外继承成员

• 11 静态公共成员继承自 QObject

详细描述

Qt3DRender::QCameraLens specifies the projection matrix that will be used to define a Camera for a 3D scene.

成员类型文档编制

enum QCameraLens:: ProjectionType

Specifies which parameters of Qt3DRender::QCameraLens are used to compute the projection matrix.

常量	值	描述
Qt3DRender::QCameraLens::OrthographicProjection	0	Orthogonal projection
Qt3DRender::QCameraLens::PerspectiveProjection	1	Perspective projection
Qt3DRender::QCameraLens::FrustumProjection	2	Frustum projection
Qt3DRender::QCameraLens::CustomProjection	3	Custom user-defined projection

特性文档编制

aspectRatio : float

Holds the current aspect ratio of the camera lens.

注意： : The return value may be undefined if the projection type is not Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	aspectRatio () const
void	setAspectRatio (float aspectRatio )

通知程序信号：

void	aspectRatioChanged (float aspectRatio )

bottom : float

Holds the current bottom plane of the camera lens.

注意： The return value may be undefined if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	bottom () const
void	setBottom (float bottom )

通知程序信号：

void	bottomChanged (float bottom )

exposure : float

Holds the current exposure of the camera lens.

访问函数：

float	exposure () const
void	setExposure (float exposure )

通知程序信号：

void	exposureChanged (float exposure )

farPlane : float

Holds the current near plane of the camera lens.

访问函数：

float	farPlane () const
void	setFarPlane (float farPlane )

通知程序信号：

void	farPlaneChanged (float farPlane )

fieldOfView : float

Holds the current field of view of the camera lens.

注意： : The return value may be undefined if the projection type is not Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	fieldOfView () const
void	setFieldOfView (float fieldOfView )

通知程序信号：

void	fieldOfViewChanged (float fieldOfView )

left : float

Holds the current left plane of the camera lens.

注意： The return value may be undefined if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	left () const
void	setLeft (float left )

通知程序信号：

void	leftChanged (float left )

nearPlane : float

Holds the current near plane of the camera lens.

访问函数：

float	nearPlane () const
void	setNearPlane (float nearPlane )

通知程序信号：

void	nearPlaneChanged (float nearPlane )

projectionMatrix : QMatrix4x4

Holds the current projection matrix of the camera lens.

访问函数：

QMatrix4x4	projectionMatrix () const
void	setProjectionMatrix (const QMatrix4x4 & projectionMatrix )

通知程序信号：

void	projectionMatrixChanged (const QMatrix4x4 & projectionMatrix )

projectionType : ProjectionType

Holds the type of the camera projection.

访问函数：

ProjectionType	projectionType () const
void	setProjectionType (ProjectionType projectionType )

通知程序信号：

void	projectionTypeChanged (QCameraLens::ProjectionType projectionType )

另请参阅 Qt3DRender::QCameraLens::ProjectionType .

right : float

Holds the current right plane of the camera lens.

注意： The return value may be undefined if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	right () const
void	setRight (float right )

通知程序信号：

void	rightChanged (float right )

top : float

Holds the current top plane of the camera lens.

注意： The return value may be undefined if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

访问函数：

float	top () const
void	setTop (float top )

通知程序信号：

void	topChanged (float top )

成员函数文档编制

QCameraLens:: QCameraLens ( QNode * parent = nullptr)

构造 QCameraLens with given parent

[protected] QCameraLens:: QCameraLens ( QCameraLensPrivate & dd , QNode * parent = nullptr)

Copy constructor.

[slot] void QCameraLens:: setAspectRatio ( float aspectRatio )

Sets the projection's aspect ratio to aspectRatio . This triggers a projection matrix update.

注意： this has no effect if the projection type is not Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 aspectRatio .

另请参阅 aspectRatio ().

[slot] void QCameraLens:: setBottom ( float bottom )

Sets the projection's bottom window coordinate to bottom . This triggers a projection matrix update.

注意： this has no effect if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 bottom .

另请参阅 bottom ().

[slot] void QCameraLens:: setExposure ( float exposure )

Sets the camera lens' exposure

注意： Setter 函数对于特性 exposure .

另请参阅 exposure ().

[slot] void QCameraLens:: setFarPlane ( float farPlane )

Sets the projection's far plane to farPlane . This triggers a projection matrix update.

注意： Setter 函数对于特性 farPlane .

另请参阅 farPlane ().

[slot] void QCameraLens:: setFieldOfView ( float fieldOfView )

Sets the projection's field of view to fieldOfView degrees. This triggers a projection matrix update.

注意： this has no effect if the projection type is not Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 fieldOfView .

另请参阅 fieldOfView ().

void QCameraLens:: setFrustumProjection ( float left , float right , float bottom , float top , float nearPlane , float farPlane )

Defines an orthographic projection based on left , right , bottom , top , nearPlane , farPlane .

[slot] void QCameraLens:: setLeft ( float left )

Sets the projection's lower left window coordinate to left . This triggers a projection matrix update.

注意： this has no effect if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 left .

另请参阅 left ().

[slot] void QCameraLens:: setNearPlane ( float nearPlane )

Sets the projection's near plane to nearPlane . This triggers a projection matrix update.

注意： Setter 函数对于特性 nearPlane .

另请参阅 nearPlane ().

void QCameraLens:: setOrthographicProjection ( float left , float right , float bottom , float top , float nearPlane , float farPlane )

Defines an orthographic projection based on left , right , bottom , top , nearPlane , farPlane .

void QCameraLens:: setPerspectiveProjection ( float fieldOfView , float aspectRatio , float nearPlane , float farPlane )

Defines a perspective projection based on fieldOfView , aspectRatio , nearPlane , farPlane .

[slot] void QCameraLens:: setProjectionMatrix (const QMatrix4x4 & projectionMatrix )

Sets the project matrix to projectionMatrix .

注意： This will set the projection type to Qt3DRender::QCameraLens::CustomProjection and thus ignore all other camera parameters that might have been specified.

注意： Setter 函数对于特性 projectionMatrix .

另请参阅 projectionMatrix ().

[slot] void QCameraLens:: setProjectionType ( ProjectionType projectionType )

Sets the lens' projection type projectionType .

注意： Qt3DRender::QCameraLens::Frustum and Qt3DRender::QCameraLens::PerspectiveProjection are two different ways of specifying the same projection.

注意： Setter 函数对于特性 projectionType .

另请参阅 projectionType ().

[slot] void QCameraLens:: setRight ( float right )

Sets the projection's upper right window coordinate to right . This triggers a projection matrix update.

注意： this has no effect if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 right .

另请参阅 right ().

[slot] void QCameraLens:: setTop ( float top )

Sets the projection's top window coordinate to top . This triggers a projection matrix update.

注意： this has no effect if the projection type is Qt3DRender::QCameraLens::PerspectiveProjection .

注意： Setter 函数对于特性 top .

另请参阅 top ().