[Mainwindow doesn't appear]

[appdev]

Hello,

I installed Qt6 and tried to run an example (cube example). At first, the mainwindow appeared, everything works fine ;I could see the cube and I could rotate it using my mouse.

But then I needed to install and link some libraries to Qt including glut and freeGlut.
The second day, I run the cube example but the mainwindow didn't even appear although I didn't modify the code.

Can someone tell me how to fix this ?

[jsulm]

@appdev said in [Mainwindow doesn't appear]:

But then I needed to install and link some libraries to Qt including glut and freeGlut

You mean link to the example app? Please explain better.

If the example app does not work anymore then please run it through debugger and see what happens.

[appdev]

Hello,

Well, I didn't link it to that example because I was developping another application and I wanted to link the library to that one and not the cube example.

I don't remember modifying the cube example but when I run it, nothing appears and the compilation shows no errors.

[jsulm]

@appdev said in [Mainwindow doesn't appear]:

but when I run it, nothing appears and the compilation shows no errors

As suggested before: run it through debugger.

[appdev]

Okay, I did that and this is where my application stops. The problem is that I wasn't the one who wrote qopenglfunctions.h.

I don't have any idea how to fix this or what it means.

[JonB]

@appdev
The Q_ASSERT() is finding the QOpenGLFunctions is not initialised. What initialisation did you do prior to this call?

[appdev]

Owh okay, I got it, I had to add initializeOpenGLFunctions(); in my glwidget::initialize()