内容

• 公共类型
• 特性
• 公共函数
• 公共槽
• 信号
• 详细描述

QPickingSettings Class

( Qt3DRender::QPickingSettings )

The QPickingSettings class specifies how entity picking is handled. 更多...

头：	#include <QPickingSettings>
qmake:	QT += 3drender
Since:	Qt 5.7
实例化：	PickingSettings
继承：	Qt3DCore::QNode

• 所有成员列表，包括继承成员

公共类型

enum	FaceOrientationPickingMode { FrontFace, BackFace, FrontAndBackFace }
enum	PickMethod { BoundingVolumePicking, TrianglePicking }
enum	PickResultMode { NearestPick, AllPicks }

特性

• faceOrientationPickingMode : FaceOrientationPickingMode
• pickMethod : PickMethod
• pickResultMode : PickResultMode

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

公共函数

	QPickingSettings (Qt3DCore::QNode * parent = nullptr)
FaceOrientationPickingMode	faceOrientationPickingMode () const
PickMethod	pickMethod () const
PickResultMode	pickResultMode () const

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

公共槽

void	setFaceOrientationPickingMode (FaceOrientationPickingMode faceOrientationPickingMode )
void	setPickMethod (PickMethod pickMethod )
void	setPickResultMode (PickResultMode pickResultMode )

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

信号

void	faceOrientationPickingModeChanged (QPickingSettings::FaceOrientationPickingMode faceOrientationPickingMode )
void	pickMethodChanged (QPickingSettings::PickMethod pickMethod )
void	pickResultModeChanged (QPickingSettings::PickResultMode pickResult )

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

额外继承成员

• 11 静态公共成员继承自 QObject
• 2 保护函数继承自 Qt3DCore::QNode
• 9 保护函数继承自 QObject

详细描述

The QPickingSettings class specifies how entity picking is handled.

The picking settings determine how the entity picking is handled. For more details about entity picking, see QObjectPicker component documentation.

Picking is triggered by mouse events. It will cast a ray through the scene and look for geometry intersecting the ray.

另请参阅 QObjectPicker , QPickEvent ，和 QPickTriangleEvent .

成员类型文档编制

enum QPickingSettings:: FaceOrientationPickingMode

Specifies how face orientation affects triangle picking

常量	值	描述
Qt3DRender::QPickingSettings::FrontFace	0x01	Only front-facing triangles will be picked (default).
Qt3DRender::QPickingSettings::BackFace	0x02	Only back-facing triangles will be picked.
Qt3DRender::QPickingSettings::FrontAndBackFace	0x03	Both front- and back-facing triangles will be picked.

enum QPickingSettings:: PickMethod

Specifies the picking method.

常量	值	描述
Qt3DRender::QPickingSettings::BoundingVolumePicking	0	An entity is considered picked if the picking ray intersects the bounding volume of the entity (default).
Qt3DRender::QPickingSettings::TrianglePicking	1	An entity is considered picked if the picking ray intersects with any triangle of the entity's mesh component.

enum QPickingSettings:: PickResultMode

Specifies what is included into the picking results.

常量	值	描述
Qt3DRender::QPickingSettings::NearestPick	0	Only the nearest entity to picking ray origin intersected by the picking ray is picked (default).
Qt3DRender::QPickingSettings::AllPicks	1	All entities that intersect the picking ray are picked.

另请参阅 Qt3DRender::QPickEvent .

特性文档编制

faceOrientationPickingMode : FaceOrientationPickingMode

Specifies how face orientation affects triangle picking

访问函数：

FaceOrientationPickingMode	faceOrientationPickingMode () const
void	setFaceOrientationPickingMode (FaceOrientationPickingMode faceOrientationPickingMode )

通知程序信号：

void	faceOrientationPickingModeChanged (QPickingSettings::FaceOrientationPickingMode faceOrientationPickingMode )

pickMethod : PickMethod

Holds the current pick method.

By default, for performance reasons, ray casting will use bounding volume picking. This may however lead to unexpected results if a small object is englobed in the bounding sphere of a large object behind it.

Triangle picking will produce exact results but is computationally more expensive.

访问函数：

PickMethod	pickMethod () const
void	setPickMethod (PickMethod pickMethod )

通知程序信号：

void	pickMethodChanged (QPickingSettings::PickMethod pickMethod )

pickResultMode : PickResultMode

Holds the current pick results mode.

By default, pick results will only be produced for the entity closest to the camera.

When setting the pick method to AllPicks , events will be triggered for all the entities with a QObjectPicker along the ray.

若 QObjectPicker is assigned to an entity with multiple children, an event will be triggered for each child entity that intersects the ray.

访问函数：

PickResultMode	pickResultMode () const
void	setPickResultMode (PickResultMode pickResultMode )

通知程序信号：

void	pickResultModeChanged (QPickingSettings::PickResultMode pickResult )

成员函数文档编制

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

Default constructs an instance of QPickingSettings.