[Development] Move math3d from QtGui to QtCore

[Laszlo Papp]

> Talking about your case in specific: multimedia applications often have a GUI.
> So using QtGui is not a big deal.  As I said, 99% of the applications do use
> QtGui anyway, so moving the classes into QtCore does not buy you much.

Sure, mplayer, mpd and /many/ other command line based multimedia
applications use that... With your thinking, there is almost no need
for things like kdecore since almost any kde applications are UI
based...

> You haven't been able to convince me that there are many applications that
> would use those classes but don't have any GUI,

Well, you can ignore our sayings, and you can force *everybody* to
depend on GUI, even for command line applications. No comment from
here, if you think this is an acceptable design for the Qt framework.
Also, QPoint, QLine and others are so much used in command line
applications...

> plus you haven't told me
> whether the single-precision floating point internals would suffice for your
> needs.

No any real clue what you mean...

Best Regards,
Laszlo Papp