On Thursday 10 Mar 2016 15:13:07 Юрий Дынников wrote: > Hello, I'm trying to use Qt3D (C++) module, and there is one huge problem: > How can I enable displaying any surface (or triangle, to be simple) from > both sides? > > I've read that that's all about face-culling, but I can't find where it is > applied during preparation of scene. > I've found QCullFace class and managed to find the place where it should > belong by finding QML examples with culling settings: > QMaterial->QTechnique->QRenderPass->QCullFace(or any other QRenderState). > But if I replace QCuboidMesh with QPlaneMesh in "Basic shapes" examples, > and try to debug all those levels of structure, I find that neither for > QPhongMaterial (tested it on Qt5.5.1) nor for QGoochMaterial (It works on > Qt5.6.0rc1) there are no QCullFace objects in their compositions. > > I've also tried to make a class for mesh of two triangles based on three > vertices, but rearranging indexes to make it "flip" didn't work. Neither > did modifying normals or tangents.
Instead of adding the CullFace to the materials, you can also add it to the framegraph. Take a copy of the ForwardRenderer.qml framegraph (if you're usign that) and add a StateSet (RenderStateSet in 5.7) to the tree containing the CullFaceState and you will also need to add in a DepthTest state object too since we are replacing Qt3D's default state. See https://bugreports.qt.io/browse/QTBUG-51770 and my comment there. Cheers, Sean > > Thanks in advance, > morodeer -- 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