Can I reload/refresh 3d model on mouse click?

Poorti

Hi All,

I am developing a 3d model loader in Qt 5.7 on Windows.
I have been successful in loading the model. The model has jpg textures.
I want to be able to reload the model (say, on a button click), whenever I replace the texture image on disk.

Here is the code that loads the model,

ASErr RenderView()
{
	view->setVisible(false);
	view->defaultFramegraph()->setClearColor(Qt::black);

	// Root entity
	Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();

	// Scene Camera
	Qt3DRender::QCamera *camera = view->camera();
	camera->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection);
	camera->setAspectRatio(view->width() / view->height());
	camera->setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
	camera->setViewCenter(QVector3D(0.0f, 1.1f, 0.0f));
	camera->setPosition(QVector3D(0.0f, 2.5f, 2.0f));
	camera->setNearPlane(0.001f);
	camera->setFarPlane(100.0f);

	// For camera controls
	Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController(sceneRoot);
	camController->setCamera(camera);

	// Scene loader
	Qt3DCore::QEntity *sceneLoaderEntity = new Qt3DCore::QEntity(sceneRoot);
	Qt3DRender::QSceneLoader *sceneLoader = new Qt3DRender::QSceneLoader(sceneLoaderEntity);

	sceneWalker = new SceneWalker(sceneLoader);
	QObject::connect(sceneLoader, &Qt3DRender::QSceneLoader::statusChanged, sceneWalker, &SceneWalker::onStatusChanged);
	sceneLoaderEntity->addComponent(sceneLoader);

	std::string url = GetUrl();
	QUrl sourceFileName(url.c_str());

	if (sourceFileName.isEmpty())
		return 0;

	sceneLoader->setSource(sourceFileName);
	view->setRootEntity(sceneRoot);
	view->show();

	return 0;
}

Here, view is a pointer to Qt3DExtras::Qt3DWindow.
I have followed the assimp-cpp sample from Qt.

How can I refresh my model on button click so that it refreshes the textures?

Poorti

Update:
When I try to call the above method after the texture jpg image is changed, I get the following exception,

ASSERT: "!is Visible()" in file defaults\qt3d window.cpp
on this line,

view->setRootEntity(sceneRoot);

How can I refresh the model view?

Poorti

Anyone?
Please guide.
I really need to understand this.

jimfar

hi did u fix it ,i also encout this problem when delete or add a 3DObject to QT3DWindow.. it seems have no convnient api to do this