Re: [Gimp-developer] Placing grid on half-pixels using the offset

[Ofnuts <ofnuts laposte net>]

On 07/10/14 12:36, Seldom Needy wrote:
> Is there a strong reason for fractional offsets (even +0.5) in the
> grid-configuration dialog being prevented? I'm working on a layout at
> present and I've noticed this limitation...
>
> Due to the snapping behavior of brushes, it's sometimes helpful to be able
> to draw/erase/smear/etc along the *middle* of a pixel if -- say -- I'm
> working with a border or divider-set which is 5 pixels wide. If I can have
> the pixel immediately under the cursor be centered where the middle pixel
> will be, I neatly get the remaining four pixels of the current tool's
> height/width symmetrically on either side... Otherwise I have to rely on
> rounding-behavior or constantly doing an additional transformation after
> each change in this part of the work.
>
> Other than having to change one field from "int" to "float", is there a
> good reason not to add this tweak for those who want it? By default, it
> would not be available unless someone specifically input a fraction into
> the grid-settings anyway.
> _______________________________________________

For all uses of guides/grid with layers this could be problematic, 
because layers cannot be positioned on half-pixels.

Did you try to use a path and View>Snap to active path?  Path doesn't 
need to be positioned on integer pixels. If you want a grid of path you 
can use my path-grid and path-shift scripts that you'll find there: 
http://sourceforge.net/projects/gimp-path-tools/files/scripts/