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| ** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). |
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| |
| #include <Qt3DQuickExtras/qt3dquickwindow.h> |
| #include <Qt3DRender/QSceneLoader> |
| #include <Qt3DCore/QEntity> |
| |
| #include <QGuiApplication> |
| #include <qqml.h> |
| |
| class SceneHelper : public QObject |
| { |
| Q_OBJECT |
| |
| public: |
| Q_INVOKABLE QObject *findEntity(Qt3DRender::QSceneLoader *loader, const QString &name); |
| Q_INVOKABLE QObject *findComponent(Qt3DCore::QEntity *entity, const QString &componentMetatype); |
| Q_INVOKABLE void addListEntry(const QVariant &list, QObject *entry); |
| }; |
| |
| QObject *SceneHelper::findEntity(Qt3DRender::QSceneLoader *loader, const QString &name) |
| { |
| // The QSceneLoader instance is a component of an entity. The loaded scene |
| // tree is added under this entity. |
| QVector<Qt3DCore::QEntity *> entities = loader->entities(); |
| |
| if (entities.isEmpty()) |
| return 0; |
| |
| // Technically there could be multiple entities referencing the scene loader |
| // but sharing is discouraged, and in our case there will be one anyhow. |
| Qt3DCore::QEntity *root = entities[0]; |
| |
| // The scene structure and names always depend on the asset. |
| return root->findChild<Qt3DCore::QEntity *>(name); |
| } |
| |
| QObject *SceneHelper::findComponent(Qt3DCore::QEntity *entity, const QString &componentMetatype) |
| { |
| Q_ASSERT(entity); |
| const Qt3DCore::QComponentVector components = entity->components(); |
| for (Qt3DCore::QComponent *component : components) { |
| qDebug() << component->metaObject()->className(); |
| if (component->metaObject()->className() == componentMetatype) { |
| return component; |
| } |
| } |
| return nullptr; |
| } |
| |
| void SceneHelper::addListEntry(const QVariant &list, QObject *entry) |
| { |
| QQmlListReference ref = list.value<QQmlListReference>(); |
| ref.append(entry); |
| } |
| |
| int main(int argc, char* argv[]) |
| { |
| QGuiApplication app(argc, argv); |
| |
| Qt3DExtras::Quick::Qt3DQuickWindow view; |
| |
| qmlRegisterType<SceneHelper>("Qt3D.Examples", 2, 0, "SceneHelper"); |
| view.setSource(QUrl("qrc:/main.qml")); |
| view.show(); |
| |
| return app.exec(); |
| } |
| |
| #include "main.moc" |