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mightyscape-0.92-deprecated/extensions/fablabchemnitz_ofsplot.py
2019-11-14 20:09:28 +01:00

112 lines
3.8 KiB
Python

#!/usr/bin/env python
from __future__ import print_function
import inkex
import cubicsuperpath, simplestyle, copy, math, re, bezmisc, simplepath
import pyclipper
import sys
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
class ofsplot(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("--count",
action="store", type="int",
dest="count", default=10,
help="Number of offset operations")
self.OptionParser.add_option("--ofs",
action="store", type="float",
dest="offset", default=2,
help="Offset amount")
self.OptionParser.add_option("--init_ofs",
action="store", type="float",
dest="init_offset", default=2,
help="Initial Offset Amount")
self.OptionParser.add_option("--copy_org",
action="store", type="inkbool",
dest="copy_org", default=True,
help="copy original path")
self.OptionParser.add_option("--ofs_incr",
action="store", type="float",
dest="offset_increase", default=2,
help="Offset increase between iterations")
def effect(self):
for id, node in self.selected.iteritems():
if node.tag == inkex.addNS('path','svg'):
p = cubicsuperpath.parsePath(node.get('d'))
scale_factor=5.0
pco = pyclipper.PyclipperOffset()
new = []
# load in initial paths
for sub in p:
sub_simple = []
h1_simple = []
h2_simple = []
for item in sub:
itemx = [float(z)*scale_factor for z in item[1]]
sub_simple.append(itemx)
#eprint(itemx)
#h1_simple.append(item[0]-item[1]) # handle 1 offset
#h2_simple.append(item[2]-item[1]) # handle 2 offset
pco.AddPath(sub_simple, pyclipper.JT_ROUND, pyclipper.ET_CLOSEDPOLYGON)
# calculate offset paths for different offset amounts
offset_list = []
offset_list.append(self.options.init_offset)
for i in range(0,self.options.count+1):
ofs_inc = +math.pow(float(i)*self.options.offset_increase,2)
if self.options.offset_increase <0:
ofs_inc = -ofs_inc
offset_list.append(offset_list[0]+float(i)*self.options.offset+ofs_inc)
solutions = []
for offset in offset_list:
solution = pco.Execute(offset*scale_factor)
solutions.append(solution)
if len(solution)<=0:
continue # no more loops to go, will provide no results.
# re-arrange solutions to fit expected format & add to array
for solution in solutions:
for sol in solution:
solx = [[float(s[0])/scale_factor, float(s[1])/scale_factor] for s in sol]
sol_p = [[a,a,a] for a in solx]
sol_p.append(sol_p[0][:])
new.append(sol_p)
# add old, just to keep (make optional!)
if self.options.copy_org:
for sub in p:
new.append(sub)
node.set('d',cubicsuperpath.formatPath(new))
if __name__ == '__main__':
e = ofsplot()
e.affect()