On Monday 28 November 2016 11:40:10 Juan Jose Casafranca wrote: > Oh thanks! > > Yes, in fact my first thought was to use it for a compute shader. It would > make Qt3D a great tool not only for rendering but also for GPGPU. > I will try to have a look on it during the Christmas vacations :-)
Awesome! Drop by #qt-3d on irc if you need anything. Cheers, Sean > > 2016-11-28 11:31 GMT+01:00 Sean Harmer <[email protected]>: > > Hi, > > > > On Monday 28 November 2016 11:22:30 Juan Jose Casafranca wrote: > > > Hi Sean, > > > > > > is there any example on how to do that? I tried to use a QRenderCapture > > > > but > > > > > I failed two weeks ago. > > > > http://code.qt.io/cgit/qt/qt3d.git/tree/tests/manual/rendercapture-qml > > http://code.qt.io/cgit/qt/qt3d.git/tree/tests/manual/rendercapture-cpp > > > > > Is there any way to access the buffers content data using a similar > > > approach to the QRenderCapture method? > > > For example, in an animation system, use a graphics pipeline to compute > > > > the > > > > > deformed mesh and then get the new vertex positions for export. > > > > Right, that is missing at the moment. It would be very useful to be able > > to do > > this to read back the results of a compute shader too for e.g.. If you > > wish to > > have a go at adding such a feature analogous the the RenderCapture node > > then > > that would be awesome. If not, we can try to do it for 5.9 but the feature > > freeze is approaching. In either case could you file a JIRA for it please? > > > > Thanks! > > > > Sean > > > > > Cheers > > > Juan José > > > > > > 2016-11-28 11:13 GMT+01:00 Sean Harmer <[email protected]>: > > > > On Monday 28 November 2016 02:23:59 Philip Schuchardt wrote: > > > > > I'm trying to port my OpenGL code (https://github.com/Cavewhere/ > > > > > > > > cavewhere/) > > > > > > > > > to use Qt3D. I think Qt3D will allow me to quickly improve and > > > > modify my > > > > > > > rendering pipeline. The one requirement I need is to be able to > > > > render > > > > > > to a > > > > > > > > > QImage and save it to disk. Currently, have a method that renders > > > > > high-resolution images from OpenGL. I do this by tiling a projection > > > > > > > > matrix > > > > > > > > > and rendering the scene one tile at a time and combining them into > > > > > on > > > > > > > > huge > > > > > > > > > PNG. The problem is I'm not sure how to render Qt3D pipeline to a > > > > > texture > > > > > and then download if from the GPU into memory in Qt3D. Is there an > > > > easy > > > > > > way > > > > > > > > > to do that? Do I need to create my own Aspect? > > > > > > > > Hi, you can use a custom frame graph that includes a QRenderCapture > > > > node > > > > > > (coming in Qt 5.8). If you combine this with a camera and some logic > > > > for > > > > > > tiling the frustum (NodeInstantiator) you should be able to replicate > > > > your > > > > > > existing logic. I'd like to get something like this wrapped up along > > > > with > > > > > > Qt > > > > 5.9. > > > > > > > > > Also, many parts of the documentation seem to be missing, very > > > > > light, > > > > > and > > > > > not up to the same standard as the rest of Qt's documentation. > > > > > > > > Yes this is something I really want to have a push on in the near > > > > future. > > > > > > Cheers, > > > > > > > > Sean > > > > > > > > > Perhaps, > > > > > I'm just missing something from the undocumented documentation. > > > > > > > > > > Thanks, > > > > > Phi|ip > > > > > > > > -- > > > > Dr Sean Harmer | [email protected] | Managing Director UK > > > > KDAB (UK) Ltd, a KDAB Group company > > > > Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 > > > > Mobile: +44 (0)7545 140604 > > > > KDAB - Qt Experts > > > > _______________________________________________ > > > > Interest mailing list > > > > [email protected] > > > > http://lists.qt-project.org/mailman/listinfo/interest > > > > -- > > Dr Sean Harmer | [email protected] | Managing Director UK > > KDAB (UK) Ltd, a KDAB Group company > > Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 > > Mobile: +44 (0)7545 140604 > > KDAB - Qt Experts -- Dr Sean Harmer | [email protected] | Managing Director UK KDAB (UK) Ltd, a KDAB Group company Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 Mobile: +44 (0)7545 140604 KDAB - Qt Experts _______________________________________________ Interest mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/interest
