QPickingSettings Class
(Qt3DRender::QPickingSettings)The QPickingSettings class specifies how entity picking is handled. More...
| Header: | #include <QPickingSettings> |
| qmake: | QT += 3drender |
| Since: | Qt 5.7 |
| Instantiated By: | PickingSettings |
| Inherits: | Qt3DCore::QNode |
Public Types
| enum | FaceOrientationPickingMode { FrontFace, BackFace, FrontAndBackFace } |
| enum | PickMethod { BoundingVolumePicking, TrianglePicking } |
| enum | PickResultMode { NearestPick, AllPicks } |
Properties
- faceOrientationPickingMode : FaceOrientationPickingMode
- pickMethod : PickMethod
- pickResultMode : PickResultMode
- 3 properties inherited from Qt3DCore::QNode
- 1 property inherited from QObject
Public Functions
| QPickingSettings(Qt3DCore::QNode *parent = nullptr) | |
| FaceOrientationPickingMode | faceOrientationPickingMode() const |
| PickMethod | pickMethod() const |
| PickResultMode | pickResultMode() const |
- 11 public functions inherited from Qt3DCore::QNode
- 32 public functions inherited from QObject
Public Slots
| void | setFaceOrientationPickingMode(FaceOrientationPickingMode faceOrientationPickingMode) |
| void | setPickMethod(PickMethod pickMethod) |
| void | setPickResultMode(PickResultMode pickResultMode) |
- 3 public slots inherited from Qt3DCore::QNode
- 1 public slot inherited from QObject
Signals
| void | faceOrientationPickingModeChanged(QPickingSettings::FaceOrientationPickingMode faceOrientationPickingMode) |
| void | pickMethodChanged(QPickingSettings::PickMethod pickMethod) |
| void | pickResultModeChanged(QPickingSettings::PickResultMode pickResult) |
- 4 signals inherited from Qt3DCore::QNode
- 2 signals inherited from QObject
Additional Inherited Members
- 1 public variable inherited from QObject
- 10 static public members inherited from QObject
- 2 protected functions inherited from Qt3DCore::QNode
- 9 protected functions inherited from QObject
- 2 protected variables inherited from QObject
Detailed Description
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.
See also QObjectPicker, QPickEvent, and QPickTriangleEvent.
Member Type Documentation
enum QPickingSettings::FaceOrientationPickingMode
Specifies how face orientation affects triangle picking
| Constant | Value | Description |
|---|---|---|
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.
| Constant | Value | Description |
|---|---|---|
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.
| Constant | Value | Description |
|---|---|---|
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. |
See also Qt3DRender::QPickEvent.
Property Documentation
faceOrientationPickingMode : FaceOrientationPickingMode
Specifies how face orientation affects triangle picking
Access functions:
| FaceOrientationPickingMode | faceOrientationPickingMode() const |
| void | setFaceOrientationPickingMode(FaceOrientationPickingMode faceOrientationPickingMode) |
Notifier signal:
| 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.
Access functions:
| PickMethod | pickMethod() const |
| void | setPickMethod(PickMethod pickMethod) |
Notifier signal:
| 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.
If a QObjectPicker is assigned to an entity with multiple children, an event will be triggered for each child entity that intersects the ray.
Access functions:
| PickResultMode | pickResultMode() const |
| void | setPickResultMode(PickResultMode pickResultMode) |
Notifier signal:
| void | pickResultModeChanged(QPickingSettings::PickResultMode pickResult) |