Re: [Gimp-developer] unified transform tool

[Liam R E Quin <liam holoweb net>]

On Fri, 2013-02-22 at 13:41 +0100, peter sikking wrote:

> actually next month I am teaching interaction again and will give
> my students the exercise ‘precision rotate and precision perspective
> one or two tools?’ including of course redesigning the tools.
>
> I will need some essential scenarios for that, beyond the obvious
> photo horizon correction and getting verticals vertical.

Actually, getting verticals vertical with a print-sized image isn't
possible right now, you can't rotate if you can't see the edges or
centre of the canvas.

Some other use cases:
* skew by 45 degrees, or by a specific measured distance
* repeat a rotation but rotate by five degrees more than last time
* scale a selection that's too large to fit on the screen

I am still using the older transform tools because they work so much
better for me *right now*, I can enter numbers, I can see the numbers in
the undo history and redo with slightly different numbers, I can drag
any part of the corrective preview grid. (I almost always use them in
corrective/reverse mode).

Once the numbers are all available to be edited on the fly and once the
undo history says "rotate 15°" instead of "some general transform or
other" the tools will be much more useful, I'll be able to use the
numbers when I can't reach the edges of the canvas to rotate.

-- 
Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/
Pictures from old books: http://fromoldbooks.org/
Ankh: irc.sorcery.net irc.gnome.org freenode/#xml