[L2Ork-dev] canvas snap-to-grid

[Albert Graef]

On Fri, Oct 30, 2020 at 2:10 PM Linux ROUEN Normandie <linux.rouen at free.fr>
wrote:

> On my side the experience with Purr Data 2.15.2 (Albert's 20201030) under
> Ubuntu 20.04 / Linux Mint 20.0 is not positive and the behavior changes
> with the zoom level.
>

Joseph, I tried, but I can't reproduce this. For me, on Manjaro it works
exactly the same on each zoom level. Can you please post a screencast
showing the issue that you're seeing?

Also note that if you have multiple objects selected, *only* the dragged
object gets aligned to the grid, any other selected objects just move along
with it, retaining their relative positions to the dragged object.

Albert


I'm taking the top/left of the objects being the reference point with a
> screen resolution of 1920 x 1080 and Purr Data Grid = 10.
>
> With Zoom level = 9.
> I take any object and move them with the mouse. Snap to Vertical grid is
> OK but not the horizontal one which -2 pixels down the grid.
>
> Change Zoom level = 13.
> The reference point of above objects has moved by -2 pixels to the left
> and no change on the horizontal one.
> Moving them with the mouse, now Snap to Vertical grid is effectively -2
> pixels left and the horizontal one is still -2 pixels down. So no possible
> alignment to the grid.
>
> Change Zoom level = 15.
> Same as for ZL 13 with more shift: from -2 pixels to -5/6 pixels, but
> never on the grid.
>
> Best, Joseph
> - - - - - - - - - - - - - - - - - - - -
>
> Le 30/10/2020 à 03:47, Albert Graef a écrit :
>
> On Thu, Oct 29, 2020 at 10:30 PM Jonathan Wilkes <jon.w.wilkes at gmail.com>
> wrote:
>
>> Canvas snap-to-grid feature is now available for review:
>>
>> https://git.purrdata.net/jwilkes/purr-data/-/merge_requests/597
>
>
> Thanks a bunch, I've really been waiting for this! :)
>
> I already merged this into my testing branch and had a quick look, works
> fine for me so far.
>
> I noticed one cosmetic issue, though. I'd suggest changing the
> translations for prefs.gui.grid.show_grid and prefs.gui.grid.show_grid_tt.
> This option is still displayed as "grid background in edit mode" right
> now, but has actually become a "snap to grid" option.
>
> My suggested translations can be found at
> https://bitbucket.org/agraef/purr-data/commits/7aca2748. (@Joseph, can
> you please check my French? Thanks.)
>
> I already have these in my testing branch, so I can add this to your MR if
> you want. Just let me know.
>
> If anyone else wants to give it a go, try
> purr-data_2.15.2+git4745+7aca2748 which is currently building in the OBS
> preview channel at
> https://build.opensuse.org/package/show/home:aggraef:purr-data-git/purr-data
> .
>
> Albert-- can you take a look at my math in canvas_snap_to_grid?
>>
>
> Looks good to me!
>
> I notice that once you start moving the selection, it kind of "snaps
>> backwards" to the "floor" gridline. Is there an easy way to fix it so
>> it always snaps to the closest gridline for the general case (e.g., in
>> the assignment to dx/dy below the snap_got_anchor conditional)?
>>
>
> I haven't thought about this in any depth, but have you tried rounding
> just xnew-xwas to the nearest grid point and finally adding snap_dx,
> likewise for y? That said, for me it already works well enough as it is.
> :)
>
> Albert
>
>
>> -Jonathan
>> _______________________________________________
>> L2Ork-dev mailing list
>> L2Ork-dev at disis.music.vt.edu
>> https://disis.music.vt.edu/listinfo/l2ork-dev
>
>
>
> --
> Dr. Albert Gr"af
> Computer Music Research Group, JGU Mainz, Germany
> Email: aggraef at gmail.com, web: https://agraef.github.io/
>
> _______________________________________________
> L2Ork-dev mailing listL2Ork-dev at disis.music.vt.eduhttps://disis.music.vt.edu/listinfo/l2ork-dev
>
>
> _______________________________________________
> L2Ork-dev mailing list
> L2Ork-dev at disis.music.vt.edu
> https://disis.music.vt.edu/listinfo/l2ork-dev



-- 
Dr. Albert Gr"af
Computer Music Research Group, JGU Mainz, Germany
Email: aggraef at gmail.com, web: https://agraef.github.io/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://disis.music.vt.edu/pipermail/l2ork-dev/attachments/20201030/326ed80c/attachment-0001.html>