Hi! On Tue, Nov 28, 2017 at 3:54 PM, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx> wrote: > Hi All, > > I wanted to somewhat reshape some curved lines in a drawing, and tried the > Cage transform, which I remember using a long time ago. After selecting the > points, it took a long time for the cage transform to calculate the cage. > But when trying to move a point on the cage, nothing happened. During all of > this calculating plus "nothing happened", these lines were printed over and > over to the terminal: > > (gimp-2.9:30657): GEGL-CRITICAL **: gegl_buffer_get: assertion > 'GEGL_IS_BUFFER (buffer)' failed > > Is there a bug? Or maybe I did something wrong? I reread through the on-line > documentation (https://docs.gimp.org/2.9/en/gimp-tool-cage.html), but maybe > I misunderstood what it says. Well if it doesn't work and if there is a GEGL-critical, yes there is definitely a bug. ;-) You should run gimp with --gtk-g-fatal-warnings to force it to crash when it gets a warning. Doing this inside gdb will get you a stacktrace which led to this warning so that you can copy-paste it in a bug report. :-) > So I switched to the Warp transform, which worked very smoothly, quickly, > responsively. It's like using a paint brush to warp the lines. The only > catch was that after moving all the lines to where you want them, then you > have to hit Return to actually apply the transform, which makes sense, but > it took me a couple tries to figure this out. > > Whoever programmed the warp transform, thank you!! This is such a nice way > to gently reshape curved lines! > > Jehan, is there any possibility that this warp transform could be made to > work symmetrically, perhaps via the symmetric painting dialog? Or maybe it > already does, but somehow I did something wrong? No. The symmetries work for paint tools (children of GimpPaintTool class), but the warp transform is not a paint tool (I mean, not in our code; it is derived directly from GimpDrawTool, which is lower level class). Of course, in theory, that could be changed. But this is not how it is implemented currently. > Anyway, I made the transformed lines symmetric by duplicating the warped > layer, flipping it around the horizontal axis, and applying a mask to hide > the untranformed half of the image, which worked out just fine. Cool. That's old style how it would have been done with paint tools as well. I guess this still has to be done for other tools until someone make symmetries even more generic. Jehan > Best, > Elle > _______________________________________________ > gimp-developer-list mailing list > List address: gimp-developer-list@xxxxxxxxx > List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list > List archives: https://mail.gnome.org/archives/gimp-developer-list -- ZeMarmot open animation film http://film.zemarmot.net Patreon: https://patreon.com/zemarmot Tipeee: https://www.tipeee.com/zemarmot _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
