plotting 3D

[d_stranz]

As far as I know, there is no general-purpose 3D scientific plotting package using Qt that is similar to Qwt or QCustomPlot. I have looked and looked with no success.

You can take a look at Qt Data Visualization, but it has a couple of drawbacks: 1) it is licensed as GPL, which means you cannot use it in a commercial application unless you have a Qt Commercial license, and 2) the architecture severely limits what you can do with it. Maybe my opinion is because I am put off by the fact that most of the examples are for QML / QtQuick, but I also don't see where there are straightforward ways to extend the functionality, So I have looked at it, but not in any great detail.