Qt3D QMesh does not emit statusChanged Signal after setting a source

Mammamia

Hi all. I am a newbie to Qt3D.

The actual loading part of OBJ file works fine in the main application and I am able to load an OBJ file to the QMesh and shows properly.

I have integrated QtTest project and was trying to test my class which actually loads the OBJ file.

I was trying to use the following code to load a test OBJ file to a QMesh in my QtTest project.

Qt3DRender::QMesh * my_mesh = new Qt3DRender::QMesh();
const QUrl file_url(QStringLiteral("qrc:/assets/quad.obj"));
connect(my_mesh, &Qt3DRender::QMesh::statusChanged, [](Qt3DRender::QMesh::Status status) { std::cout << "status=" << status << std::endl; });
my_mesh->setSource(file_url);

The above will be inside the loadRoom() function of my Class which I need to test.

I have also seen that the QMesh emits the signal when the SourceName changes. But not the Status..

Any idea why it didn't work on QtTest class??

SGaist

Hi,

Can you provide a minimal compilable example that shows that behaviour ?
Did you check whether the bug report system already contains something about that ?

PhilippEngelhard

Hi all,
I want to write Tests that rely on a QMesh being loaded, but I never receive Qt3DRender::QMesh::statusChanged nor if I wait it out, it also never gets loaded.
I have made an example to show this behaviour. I tried to keep it minimal. It has two projects, one where I load the QMesh and show it in a Scene3D (that works). The second one loads the QMesh in a QTTest and there is fails to load and emit any signals.

https://github.com/Loxodromics/fuzzy-happiness

Does anyone has an idea what is going wrong or how I can test my code that depends on QMesh?

Thank you in advance.

SGaist

Hi,

What version of Qt are you using ?
On what platform ?

PhilippEngelhard

I'm using Qt 5.12.1 on macOS 10.14.3