On 20/11/2014 16:32, Jonathan Poncelet wrote:
Hi all,
I'm attempting to use the QGLPainter from Qt3D with Qt 5.4's new
QOpenGLWidget - I was originally making do with QGLWidget from the
previous Qt version but I was running into trouble with putting
widgets, buttons, etc. on top of the GL widget, which is something I
need to do. I'm fairly familiar with the Qt3D library but not so much
on the in-depth side, and right now if I call begin() on a QGLPainter
I create in the QOpenGLWidget's paintGL() function, I get the
following messages output before the program crashes:
/Attempt to cast non-window surface/
/Attempt to activate GL window surface on bad context/
/
/
I've tried various things - calling begin() and passing the widget's
GL context doesn't have any effect, and the function won't accept the
context's QSurface as it's expecting a QGLSurface. Is there any way to
get QGLPainter working with the new QOpenGLWidget, or will I have to
stick with QGLWidget?
The old Qt3D is no longer being developed or maintained so please do not
use it. We are busy rewriting Qt3D but in it's current state it is not
possible to overlay widgets over a Qt3D window. This is in the feature
roadmap however.
It sounds like you just need to use QOpenGLWidget which allows
compositing widgets on top of the contained OpenGL content.
Alternatively if you want to overlay Qt Quick 2 UI on top of GL you can
use the QQuickWindow::beforeRendering() signal. See the openglunderqml
example to see how to do this.
Cheers,
Sean
--
Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK
Klarälvdalens Datakonsult AB, a KDAB Group company
Tel. Sweden (HQ) +46-563-540090, USA +1-866-777-KDAB(5322)
KDAB - Qt Experts - Platform-independent software solutions
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