Game Development

Using the minimal example above, I fixed this by removing this call in our QOpenGlWidget subclass's constructor: setAttribute( Qt::WA_PaintOnScreen, true ); Removing this got rid of the paintengine calls (and numerous other problems). Thanks!!!!

Oops, look like my suggestion to use a render state set was not correct, sorry! I thought QSortPolicy was a render state. But I found this repo some time ago and it uses the sorting policy in OffscreenLayer.qml. Maybe this helps, because it implements transparency :)

@sinanmut When I create the 3D objects in the initializeGL function, it is fine paintGL function renders these objects. Later on when I want to add new objects to the scene I don't see these new ones being rendered by painGL function. Is there any flag that I have to add in paintGL fuinction or in initializeGL function? Thanks,

@mohammad_palwala shouldn't you asked in some FSUIPC mailing list? Your issue seems not related to Qt...

I find solution. The structure of entityes must include Layerfilter. Qt3DRender::QViewport *viewport = new Qt3DRender::QViewport(view->renderSettings()->activeFrameGraph());//here must be your framegraph auto surselector =new Qt3DRender::QRenderSurfaceSelector(viewport); surselector->setSurface(view); auto layerfilter = new Qt3DRender::QLayerFilter(surselector); auto layer = new Qt3DRender::QLayer(root);//yours root entity layer ->setRecursive(true); Qt3DRender::QCameraSelector *cameraSelector = new Qt3DRender::QCameraSelector(layerfilter); Qt3DRender::QClearBuffers *clearBuffers = new Qt3DRender::QClearBuffers(cameraSelector); clearBuffers->setClearColor(QColor(100.0, 100.0, 100.0)); cameraSelector->setCamera(view->camera()); clearBuffers->setBuffers(Qt3DRender::QClearBuffers::AllBuffers); Qt3DRender::QRenderStateSet* rendstate = new Qt3DRender::QRenderStateSet(clearBuffers); rendstate->setParent(clearBuffers); Qt3DRender::QDepthTest* depth = new Qt3DRender::QDepthTest();//Without this nothing will work depth->setDepthFunction(Qt3DRender::QDepthTest::LessOrEqual); rendstate->addRenderState(depth); Qt3DRender::QLineWidth* lw = new Qt3DRender::QLineWidth(rendstate);//render state for example lw->setValue(8); rendstate->addRenderState(lw); " layer " must be adde as component to entity

It's basically a sequence of images, but I want to play it back as "video".

@JKSH Yes, I had to reinstalled QT on Visual C++. Works OK... THANKS!!!

Before dimming your problem simple, you might want to consider providing a more thorough description of what exactly you want to achieve. Using a framework where you can do 2D/3D rendering with raw OpenGL or more sophisticated high level classes as well as video rendering, asking how to show a 2D/3D scene is not exactly the same as asking how to show two videos showing 2D/3D scenes. Therefore, can you explain exactly what your application is about and what exactly you are trying to show ? On a side note, criticising all the moderators when only one of them answered you, trying to help you with the limited information you gave, isn't really a good attitude.

Because if you use a tight loop you'll block Qt's event loop hence no painting.

@signalK said in Where does appear the functions which draw the objects ?: how to : 1)open "toyplane.obj" file ? 2)edit this file ? in the 3D application of your choice (3ds Max, Maya, Blender, ...)

@KillerSmath Thank you very much, but I want to know how to draw lines using the Qt3D framework.

Hej A.K.G. I'm only found in the documentation that is possible with extensions. My idea to solve your problem is: Integrate a physic engine like Bullet (http://bulletphysics.org/wordpress/) and you find out all collision detection and physics. Qt 3D as 3D drawing engine, and Bullet (or other software) for physic & collision representation. Regards, Jakob

Hi, That's a question better asked on the interest mailing list. You'll find there Qt3D's developers/maintainers. This forum is more user oriented.