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50
51#include <Qt3DQuickExtras/qt3dquickwindow.h>
52#include <Qt3DRender/QSceneLoader>
53#include <Qt3DCore/QEntity>
54
55#include <QGuiApplication>
56#include <qqml.h>
57
58class SceneHelper : public QObject
59{
60 Q_OBJECT
61
62public:
63 Q_INVOKABLE QObject *findEntity(Qt3DRender::QSceneLoader *loader, const QString &name);
64 Q_INVOKABLE QObject *findComponent(Qt3DCore::QEntity *entity, const QString &componentMetatype);
65 Q_INVOKABLE void addListEntry(const QVariant &list, QObject *entry);
66};
67
68QObject *SceneHelper::findEntity(Qt3DRender::QSceneLoader *loader, const QString &name)
69{
70 // The QSceneLoader instance is a component of an entity. The loaded scene
71 // tree is added under this entity.
72 QVector<Qt3DCore::QEntity *> entities = loader->entities();
73
74 if (entities.isEmpty())
75 return 0;
76
77 // Technically there could be multiple entities referencing the scene loader
78 // but sharing is discouraged, and in our case there will be one anyhow.
79 Qt3DCore::QEntity *root = entities[0];
80
81 // The scene structure and names always depend on the asset.
82 return root->findChild<Qt3DCore::QEntity *>(aName: name);
83}
84
85QObject *SceneHelper::findComponent(Qt3DCore::QEntity *entity, const QString &componentMetatype)
86{
87 Q_ASSERT(entity);
88 const Qt3DCore::QComponentVector components = entity->components();
89 for (Qt3DCore::QComponent *component : components) {
90 qDebug() << component->metaObject()->className();
91 if (component->metaObject()->className() == componentMetatype) {
92 return component;
93 }
94 }
95 return nullptr;
96}
97
98void SceneHelper::addListEntry(const QVariant &list, QObject *entry)
99{
100 QQmlListReference ref = list.value<QQmlListReference>();
101 ref.append(entry);
102}
103
104int main(int argc, char* argv[])
105{
106 QGuiApplication app(argc, argv);
107
108 Qt3DExtras::Quick::Qt3DQuickWindow view;
109
110 qmlRegisterType<SceneHelper>(uri: "Qt3D.Examples", versionMajor: 2, versionMinor: 0, qmlName: "SceneHelper");
111 view.setSource(QUrl("qrc:/main.qml"));
112 view.show();
113
114 return app.exec();
115}
116
117#include "main.moc"
118

source code of qt3d/tests/manual/assimp/main.cpp