OpenGL with Graphics View?

[wysota]

Or would I have to overpaint in a QGLWidget to do this and not use the graphics view framework?

You can make the QGLWidget a viewport of the graphicsview and then use pure GL calls inside the items' paint() routines to do the painting, that's not a problem. You can even mix GL and QPainter based items if you want. Either way be sure to draw in the right coordinates (remember about the bounding rect and transformations applied to items).

[Dutch112]

You can make the QGLWidget a viewport of the graphicsview and then use pure GL calls inside the items' paint() routines to do the painting, that's not a problem. You can even mix GL and QPainter based items if you want. Either way be sure to draw in the right coordinates (remember about the bounding rect and transformations applied to items).

Is this preferable to creating a subclass of QGLWidget and trying to add that widget to the scene?

[wysota]

Is this preferable to creating a subclass of QGLWidget and trying to add that widget to the scene?

From what I know this will currently not work.

[ricardo]

From what I know this will currently not work.

I'm doing to create my game level editor and everything works fine.


@Dutch112. How are you going to control your animation time? are you going to use QTimer or just a common loop game?

[olidem]

Well, that's not so easy.
First, AFAIK not every system supports these framebuffers. Pls correct me if I'm wrong.

Secondly, I would have to initialize (initializeGL, resizeGL and paintGL) this new OpenGL object. As I am doing it up to now, all these initialisations are already done for me by the Qt subsystem.
This means that I would have to ready out the projection and modelview matices everytime and keep a copy of them locally up to date.

[wysota]

It's either this or grabbing the widget or forgetting about GL... You can't use GL calls on a non-gl context and if you want a canvas that is different than the widget you have to set it up separately.