Displays four-dimensional objects and functions by projecting them into three-dimensional space. Viewpoint transformations and parameter changes are displayed in real time.
Huh. Seems to work fine. Almost fine, that is. When changing a parameter, the object resets to the default transformation, and then the animation continues from there. I think that is acceptable, though. Case closed.
...does not work for some reason. Or is the reason that the object changed while animated? Find that out.
Anyway, when this has turned up, there is no possibility to make parameter chnages working again. Program must be restarted.
I /think/ that's how it is. Further inquiry needed.