Re: [Inkscape-devel] Inkscape for embroidery

-- Mc On 11/22/2016 10:06 AM, Martin Owens wrote: > Hi Alexander, > > We've not moved to github yet, so if you need to do a merge request, > you'll either have to make a bzr branch or get the help of another > developer (hopefully on the mailing list) to do the merge for you. > > Best Regards, Martin Owens > > On Tue, 2016-11-22 at 01:30 +0100, Alexander Brock wrote: >> On 11/21/2016 05:53 PM, Jabier Arraiza wrote: >>> >>> Is cool you improve it! Im working in a offset LPE currently and >>> hope >>> can use this new code soon. >> I improved it further the new code is in the *_stable-functions here: >> https://github.com/abrock/lib2geom/blob/master/src/toys/geom-pathstro >> ke.cpp >> >> The old method for offset_cubic: >> 1. move the control points >> 2. checked if the error at t=.5 was below some threshold >> 2. a) if yes return >> 2. b) otherwise subdivide path and repeat (up to some recursion depth >> limit). >> >> The new method: >> 1. move the control points >> 2. Find the point on the curve where the distance differs the most >> from >> the desired distance >> 3. Adjust control point (only lengthes, preserve direction and >> smoothness) to minimize this maximum error >> 4. checked if the error at t=.5 was below some threshold >> 4. a) if yes return >> 4. b) otherwise subdivide path and repeat (up to some recursion depth >> limit). >> >> This method seems to prevent degradation where the number of nodes >> increases exponentially due to numerical instability. Attached are >> examples of the old and new method used to repeatedly offset an >> initial >> red curve. The old code produces 4625 segments in the last step, the >> new >> code 3. >> >> Should I prepare a merge request? >> I'd like to run some tests, any suggestions which kind? I think the >> most >> important thing is to test for a wide variety of paths if the created >> offset path has constant distance from the original path. >> >> Best Regards, >> Alexander >> ------------------------------------------------------------------- >> ----------- >> _______________________________________________ >> Inkscape-devel mailing list >> Inkscape-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/inkscape-devel > > ------------------------------------------------------------------------------ > _______________________________________________ > Inkscape-devel mailing list > Inkscape-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/inkscape-devel >