How do I draw a simple line in Qt3D?

Question

I feel like this should be pretty straightforward, but for my life I can\'t figure out how to draw a basic line using Qt 3D. The only guidance I\'ve been able to find on the sub

Answer 1

I'd suggest looking at https://doc-snapshots.qt.io/qt5-5.9/qt3d-basicshapes-cpp-example.html , as a while ago I asked myself a similar question, namely, how to draw a circle. Well, a circle in 3D is a torus with a special proportion of its radii:

// thin Torus = Circle in 3D
Qt3DCore::QEntity *torusEntity0 = new Qt3DCore::QEntity(rootEntity);
Qt3DExtras::QTorusMesh *torusMesh0 = new Qt3DExtras::QTorusMesh;
torusMesh0->setRadius(15);
torusMesh0->setMinorRadius(0.01f);
torusMesh0->setRings(100);
torusMesh0->setSlices(20);
torusEntity0->addComponent(torusMesh0);
torusEntity0->addComponent(material);

So what would be a line in 3D? It would be a cylinder with a very small outer radius.