From cdb8fdb1339476e36ad2e294283eec33d13b2d3d Mon Sep 17 00:00:00 2001 From: Lex Neva Date: Fri, 27 Jul 2018 20:26:18 -0400 Subject: add bean stitch option --- lib/stitches/running_stitch.py | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'lib/stitches') diff --git a/lib/stitches/running_stitch.py b/lib/stitches/running_stitch.py index 96075e7a..5f8ed21e 100644 --- a/lib/stitches/running_stitch.py +++ b/lib/stitches/running_stitch.py @@ -1,3 +1,6 @@ +from copy import copy + + """ Utility functions to produce running stitches. """ @@ -64,3 +67,29 @@ def running_stitch(points, stitch_length): output.append(segment_start) return output + + +def bean_stitch(stitches, repeats): + """Generate bean stitch from a set of stitches. + + "Bean" stitch is made by backtracking each stitch to make it heaver. A + simple bean stitch would be two stitches forward, one stitch back, two + stitches forward, etc. This would result in each stitch being tripled. + + We'll say that the above counts as 1 repeat. Backtracking each stitch + repeatedly will result in a heavier bean stitch. There will always be + an odd number of threads piled up for each stitch. + """ + + if len(stitches) < 2: + return stitches + + new_stitches = [stitches[0]] + + for stitch in stitches: + new_stitches.append(stitch) + + for i in xrange(repeats): + new_stitches.extend(copy(new_stitches[-2:])) + + return new_stitches -- cgit v1.2.3