QSceneLoader Class

(Qt3DRender::QSceneLoader)

Provides the facility to load an existing Scene. More...

Header:	#include <QSceneLoader>
qmake:	QT += 3drender
Since:	Qt 5.7
Instantiated By:	SceneLoader
Inherits:	Qt3DCore::QComponent

• List of all members, including inherited members
• Obsolete members

Public Types

enum	ComponentType { UnknownComponent, GeometryRendererComponent, TransformComponent, MaterialComponent, LightComponent, CameraLensComponent }
enum	Status { None, Loading, Ready, Error }

Properties

• source : QUrl
• status : const Status

• 1 property inherited from Qt3DCore::QComponent
• 3 properties inherited from Qt3DCore::QNode
• 1 property inherited from QObject

Public Functions

	QSceneLoader(Qt3DCore::QNode *parent = nullptr)
Qt3DCore::QComponent *	component(const QString &entityName, Qt3DRender::QSceneLoader::ComponentType componentType) const
Qt3DCore::QEntity *	entity(const QString &entityName) const
QStringList	entityNames() const
QUrl	source() const
Qt3DRender::QSceneLoader::Status	status() const

• 2 public functions inherited from Qt3DCore::QComponent
• 13 public functions inherited from Qt3DCore::QNode
• 31 public functions inherited from QObject

Public Slots

void	setSource(const QUrl &arg)

• 1 public slot inherited from Qt3DCore::QComponent
• 3 public slots inherited from Qt3DCore::QNode
• 1 public slot inherited from QObject

Signals

void	sourceChanged(const QUrl &source)
void	statusChanged(Qt3DRender::QSceneLoader::Status status)

• 3 signals inherited from Qt3DCore::QComponent
• 4 signals inherited from Qt3DCore::QNode
• 2 signals inherited from QObject

Static Public Members

const QMetaObject

staticMetaObject

• 9 static public members inherited from QObject

Additional Inherited Members

• 2 protected functions inherited from Qt3DCore::QNode
• 9 protected functions inherited from QObject

Detailed Description

Provides the facility to load an existing Scene.

Given a 3D source file, the Qt3DRender::QSceneLoader will try to parse it and build a tree of Qt3DCore::QEntity objects with proper Qt3DRender::QGeometryRenderer, Qt3DCore::QTransform and Qt3DRender::QMaterial components.

The loader will try to determine the best material to be used based on the properties of the model file. If you wish to use a custom material, you will have to traverse the tree and replace the default associated materials with yours.

As the name implies, Qt3DRender::QSceneLoader loads a complete scene subtree. If you wish to load a single piece of geometry, you should rather use the Qt3DRender::QMesh instead.

Qt3DRender::QSceneLoader internally relies on the use of plugins to support a wide variety of 3D file formats. Here is a list of formats that are supported by Qt3D.

Note: this component shouldn't be shared among several Qt3DCore::QEntity instances. Undefined behavior will result.

See also Qt3DRender::QMesh and Qt3DRender::QGeometryRenderer.

Member Type Documentation

enum QSceneLoader::ComponentType

This enum specifies a component type.

Constant	Value	Description
Qt3DRender::QSceneLoader::UnknownComponent	0	Unknown component type
Qt3DRender::QSceneLoader::GeometryRendererComponent	1	Qt3DRender::QGeometryRenderer component
Qt3DRender::QSceneLoader::TransformComponent	2	Qt3DCore::QTransform component
Qt3DRender::QSceneLoader::MaterialComponent	3	Qt3DRender::QMaterial component
Qt3DRender::QSceneLoader::LightComponent	4	Qt3DRender::QAbstractLight component
Qt3DRender::QSceneLoader::CameraLensComponent	5	Qt3DRender::QCameraLens component

enum QSceneLoader::Status

This enum identifies the state of loading

Constant	Value	Description
Qt3DRender::QSceneLoader::None	0	The Qt3DRender::QSceneLoader hasn't been used yet.
Qt3DRender::QSceneLoader::Loading	1	The Qt3DRender::QSceneLoader is currently loading the scene file.
Qt3DRender::QSceneLoader::Ready	2	The Qt3DRender::QSceneLoader successfully loaded the scene file.
Qt3DRender::QSceneLoader::Error	3	The Qt3DRender::QSceneLoader encountered an error while loading the scene file.

Member Function Documentation

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

The constructor creates an instance with the specified parent.

Qt3DCore::QComponent *QSceneLoader::component(const QString &entityName, Qt3DRender::QSceneLoader::ComponentType componentType) const

Returns a component matching componentType of a loaded entity with an objectName matching the entityName. If the entity has multiple matching components, the first match in the component list of the entity is returned. If there is no match, a null pointer is returned.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

Qt3DCore::QEntity *QSceneLoader::entity(const QString &entityName) const

Returns a loaded entity with an objectName matching the entityName parameter. If multiple entities have the same name, it is undefined which one of them is returned, but it will always be the same one.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

QStringList QSceneLoader::entityNames() const

Returns a list of the objectNames of the loaded entities.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.