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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#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.
QList<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"
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