內容

• 公共類型
• 特性
• 公共函數
• 公共槽
• 信號
• 詳細描述

QPickingSettings Class

( Qt3DRender::QPickingSettings )

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

頭：	#include <QPickingSettings>
qmake:	QT += 3drender
Since:	Qt 5.7
實例化：	PickingSettings
繼承：	Qt3DCore::QNode

• 所有成員列錶，包括繼承成員

公共類型

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

特性

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

• 3 特性繼承自 Qt3DCore::QNode
• 1 特性繼承自 QObject

公共函數

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

• 11 公共函數繼承自 Qt3DCore::QNode
• 32 公共函數繼承自 QObject

公共槽

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

• 3 公共槽繼承自 Qt3DCore::QNode
• 1 公共槽繼承自 QObject

信號

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

• 4 信號繼承自 Qt3DCore::QNode
• 2 信號繼承自 QObject

額外繼承成員

• 11 靜態公共成員繼承自 QObject
• 2 保護函數繼承自 Qt3DCore::QNode
• 9 保護函數繼承自 QObject

詳細描述

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.

另請參閱 QObjectPicker , QPickEvent ，和 QPickTriangleEvent .

成員類型文檔編製

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.

另請參閱 Qt3DRender::QPickEvent .

特性文檔編製

faceOrientationPickingMode : FaceOrientationPickingMode

Specifies how face orientation affects triangle picking

訪問函數：

FaceOrientationPickingMode	faceOrientationPickingMode () const
void	setFaceOrientationPickingMode (FaceOrientationPickingMode faceOrientationPickingMode )

通知程序信號：

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.

訪問函數：

PickMethod	pickMethod () const
void	setPickMethod (PickMethod pickMethod )

通知程序信號：

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.

訪問函數：

PickResultMode	pickResultMode () const
void	setPickResultMode (PickResultMode pickResultMode )

通知程序信號：

void	pickResultModeChanged (QPickingSettings::PickResultMode pickResult )

成員函數文檔編製

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

Default constructs an instance of QPickingSettings.