Please ignore my earlier mail because it was sent too soon. :-(
Hello all,
I am trying to fix transformation behavior for LPE (translation, scaling, rotation). I think I found a fundamental problem.
Take Stitch Subcurves. Let's say we are stitching between a straight horizontal line, and a line with a horizontal and angled part: Because stitching is equidistant, the stitch start points would be:
____o_____________o / / / o
o__________o___________o
Note that the distance between stitch points is constant *along* the length of the line (not just the distance in the x-direction as this would not work in general)
Now, after scaling in the Y direction:
__________________o / | | o | | | / | | | | | | / o
o__________o___________o
Can you spot the problem? The 2nd line has shifted position along the line, because the distance along the angled part of the topline changed dramatically. For 'correct visual scaling' the result should have been:
____o_____________o / | | | | | | / | | | | | | / o
o__________o___________o
This however can never be the result of any stitch subpath, because the stitch start points are not equidistant (unless using the variance parameters and being very very lucky).
I have attached an SVG for you to try with the latest inkscape SVN. Note that this problem exists regardless of the "scale width relative" setting.
Thanks for any comment on how to "fix" this.
kind regards, Johan
