QObjectPicker

The QObjectPicker class instantiates a component that can be used to interact with a QEntity by a process known as picking. More…

Synopsis

Functions

• def containsMouse ()

• def isDragEnabled ()

• def isHoverEnabled ()

• def isPressed ()

• def priority ()

Slots

• def setDragEnabled (dragEnabled)

• def setHoverEnabled (hoverEnabled)

• def setPriority (priority)

Signals

• def clicked (pick)

• def containsMouseChanged (containsMouse)

• def dragEnabledChanged (dragEnabled)

• def entered ()

• def exited ()

• def hoverEnabledChanged (hoverEnabled)

• def moved (pick)

• def pressed (pick)

• def pressedChanged (pressed)

• def priorityChanged (priority)

• def released (pick)

Detailed Description

For every combination of viewport and camera, picking casts a ray through the scene to find entities who’s bounding volume intersects the ray. The bounding volume is computed using the values in the attribute buffer specified by the boundingVolumePositionAttribute of the geometry.

The signals pressed() , released() , clicked() , moved() , entered() , and exited() are emitted when the bounding volume defined by the pickAttribute property intersects with a ray.

Most signals carry a QPickEvent instance. If QPickingSettings::pickMode() is set to TrianglePicking , the actual type of the pick parameter will be QPickTriangleEvent .

Pick queries are performed on mouse press and mouse release. If drag is enabled, queries also happen on each mouse move while any button is pressed. If hover is enabled, queries happen on every mouse move even if no button is pressed.

For generalised ray casting queries, see QRayCaster and QScreenRayCaster .

Note

Instances of this component shouldn’t be shared, not respecting that condition will most likely result in undefined behavior.

Note

The camera far plane value affects picking and produces incorrect results due to floating-point precision if it is greater than ~100 000.

See also

QPickingSettings QGeometry QAttribute QPickEvent QPickTriangleEvent QNoPicking

class PySide2.Qt3DRender.Qt3DRender.QObjectPicker([parent=None])

Parameters:

parent – PySide2.Qt3DCore.Qt3DCore.QNode

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.clicked(pick)

Parameters:

pick – PySide2.Qt3DRender.Qt3DRender.QPickEvent

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.containsMouse()

Return type:

bool

Specifies if the object picker currently contains the mouse

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.containsMouseChanged(containsMouse)

Parameters:

containsMouse – bool

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.dragEnabledChanged(dragEnabled)

Parameters:

dragEnabled – bool

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.entered()

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.exited()

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.hoverEnabledChanged(hoverEnabled)

Parameters:

hoverEnabled – bool

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.isDragEnabled()

Return type:

bool

Specifies if drag is enabled

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.isHoverEnabled()

Return type:

bool

Specifies if hover is enabled

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.isPressed()

Return type:

bool

Specifies if the object picker is currently pressed

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.moved(pick)

Parameters:

pick – PySide2.Qt3DRender.Qt3DRender.QPickEvent

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.pressed(pick)

Parameters:

pick – PySide2.Qt3DRender.Qt3DRender.QPickEvent

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.pressedChanged(pressed)

Parameters:

pressed – bool

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.priority()

Return type:

int

The priority to be used when filtering pick results by priority when pickResultMode is set to NearestPriorityPick .

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.priorityChanged(priority)

Parameters:

priority – int

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.released(pick)

Parameters:

pick – PySide2.Qt3DRender.Qt3DRender.QPickEvent

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.setDragEnabled(dragEnabled)

Parameters:

dragEnabled – bool

Specifies if drag is enabled

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.setHoverEnabled(hoverEnabled)

Parameters:

hoverEnabled – bool

Specifies if hover is enabled

PySide2.Qt3DRender.Qt3DRender.QObjectPicker.setPriority(priority)

Parameters:

priority – int

The priority to be used when filtering pick results by priority when pickResultMode is set to NearestPriorityPick .