QAbstractRayCaster Class

(Qt3DRender::QAbstractRayCaster)

An abstract base class for ray casting in 3d scenes. More...

Header:	#include <QAbstractRayCaster>
qmake:	QT += 3drender
Since:	Qt 5.11
Instantiated By:	AbstractRayCaster
Inherits:	Qt3DCore::QComponent
Inherited By:	Qt3DRender::QRayCaster and Qt3DRender::QScreenRayCaster

This class was introduced in Qt 5.11.

• List of all members, including inherited members

Public Types

enum	FilterMode { AcceptAnyMatchingLayers, AcceptAllMatchingLayers, DiscardAnyMatchingLayers, DiscardAllMatchingLayers }
enum	RunMode { Continuous, SingleShot }

Properties

• filterMode : FilterMode
• hits : const Hits
• runMode : RunMode

Public Functions

void	addLayer(Qt3DRender::QLayer *layer)
Qt3DRender::QAbstractRayCaster::FilterMode	filterMode() const
Qt3DRender::QAbstractRayCaster::Hits	hits() const
QVector<Qt3DRender::QLayer *>	layers() const
void	removeLayer(Qt3DRender::QLayer *layer)
Qt3DRender::QAbstractRayCaster::RunMode	runMode() const

Public Slots

void	setFilterMode(Qt3DRender::QAbstractRayCaster::FilterMode filterMode)
void	setRunMode(Qt3DRender::QAbstractRayCaster::RunMode runMode)

Signals

void	filterModeChanged(Qt3DRender::QAbstractRayCaster::FilterMode filterMode)
void	hitsChanged(const Qt3DRender::QAbstractRayCaster::Hits &hits)
void	runModeChanged(Qt3DRender::QAbstractRayCaster::RunMode runMode)

Detailed Description

Qt3DRender::QAbstractRayCaster is an abstract base class for casting rays into a 3d scene. Qt3DRender::QAbstractRayCaster can not be directly instantiated, but rather through its subclasses. QAbstractRayCaster specifies common properties for all ray casters, such as run mode and layer handling, while leaving the actual ray casting details to the subclasses.

Ray castings differs from picking (using Qt3DRender::QObjectPicker) in that it does not require mouse events to trigger.

By default, the instances of Qt3DRender::QAbstractRayCaster are disabled. When enabled, the specified ray will be tested for intersecting objects at every frame. The QAbstractRayCaster::hits property will be updated with the results of the ray casting, even if no objects are found.

The Qt3DRender::QPickingSettings can be used to control the ray casting, such as which primitives are tested and how the results are returned.

Furthermore, Qt3DRender::QLayer components can be used to control how entities, or entity sub-graphs, react to ray casting.

Note: Components derived from QAbstractRayCaster should not be shared amount multiple entities.

See also Qt3DRender::QRayCaster, Qt3DRender::QScreenRayCaster, Qt3DRender::QObjectPicker, Qt3DRender::QPickingSettings, and Qt3DRender::QNoPicking.

Member Type Documentation

enum QAbstractRayCaster::FilterMode

Specifies the rules for selecting entities to test for raycasting.

Constant	Value	Description
Qt3DRender::QAbstractRayCaster::AcceptAnyMatchingLayers	0	Accept entities that reference one or more QLayer objects added to this QAbstractRayCaster. This is the default
Qt3DRender::QAbstractRayCaster::AcceptAllMatchingLayers	1	Accept entities that reference all the QLayer objects added to this QAbstractRayCaster
Qt3DRender::QAbstractRayCaster::DiscardAnyMatchingLayers	2	Discard entities that reference one or more QLayer objects added to this QAbstractRayCaster
Qt3DRender::QAbstractRayCaster::DiscardAllMatchingLayers	3	Discard entities that reference all QLayer objects added to this QAbstractRayCaster

enum QAbstractRayCaster::RunMode

This enumeration specifies how often ray casting is performed

Constant	Value	Description
Qt3DRender::QAbstractRayCaster::Continuous	0	Ray casting is performed at every frame as long as the component is enabled.
Qt3DRender::QAbstractRayCaster::SingleShot	1	Ray casting is done once then the component disables itself. This is the default

Member Function Documentation

void QAbstractRayCaster::addLayer(Qt3DRender::QLayer *layer)

Add layer to the current list of layers

QVector<Qt3DRender::QLayer *> QAbstractRayCaster::layers() const

Returns the current list of layers

void QAbstractRayCaster::removeLayer(Qt3DRender::QLayer *layer)

Remove layer from the current list of layers