On 15 March 2016 at 22:34, Sean Harmer <sean.har...@kdab.com> wrote: > On Tuesday 15 Mar 2016 17:41:07 Ch'Gans wrote: >> On 14 March 2016 at 22:03, Sean Harmer <sean.har...@kdab.com> wrote: >> > On Monday 14 Mar 2016 16:50:32 Ch'Gans wrote: >> >> >> >> Could anyone shed some light on how I could achieve this, like is the >> >> custom QMEsh/Geometry the right approach for this kind of problems? >> > >> > If you want to extrude, then yes you need actual geometry so investigating >> > QGeometry is the way to go. Basically, you provide a QBuffer containing >> > your per-vertex data (positions, but maybe also normal vectors if you >> > want lighting, texture coordinates if you want to apply a texture, vertex >> > colors if you want to use the per-vertex colour material etc). >> > >> > You then define one or more QAttributes that correspond to these >> > per-vertex >> > attributes. The QAttributes describe the layout of the data in the >> > QBuffer. >> > >> > You can then specify the QGeometry that contains the attributes in a >> > QGeometryRenderer component. >> >> Wow!!! >> Thanks for this explanation, it sounds so easy said this way! ;) >> >> I saw this QAttribute thing, but didn't bother digging further. But >> now I have a better picture on how all this works. >> Again, thanks a lot for your enlightening comments. >> >> Maybe it would be nice to have a cpp example that show this. That was >> my blocker as I went through all the examples, there's the case where >> you load your model from a file, there's an example where you use >> built-in geometry (Cuboid, Sphere, ...), and that was it, nothing >> about custom geometry. (Don't get me wrong I'm not ranting, what you >> guys are doing is awesome, as it has always been.) > > How about the cunningly named custom-mesh-cpp example? ;) > > https://code.woboq.org/qt5/qt3d/examples/qt3d/custom-mesh-cpp/main.cpp.html > > Replace the buffer contents with your own geometry for a starting point.
Oops! Missed that one. Really worth it, just for the ASCII art! :P Thanks, Chris > > Cheers, > > Sean > -- > Dr Sean Harmer | sean.har...@kdab.com | 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 Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
