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mightyscape-1.1-deprecated/extensions/fablabchemnitz/join_paths_optimized/join_paths_optimized.py

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#!/usr/bin/env python3
'''
Inkscape extension to join the selected paths. With the optimized option selected,
the next path to be joined is the one, which has one of its end nodes closest to the ending
node of the earlier path.
Copyright (C) 2019 Shrinivas Kulkarni
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
'''
import inkex
from inkex.paths import CubicSuperPath
import copy
def floatCmpWithMargin(float1, float2, margin):
return abs(float1 - float2) < margin
def vectCmpWithMargin(vect1, vect2, margin):
return all(floatCmpWithMargin(vect2[i], vect1[i], margin) for i in range(0, len(vect1)))
def getPartsFromCubicSuper(cspath):
parts = []
for subpath in cspath:
part = []
prevBezPt = None
for i, bezierPt in enumerate(subpath):
if(prevBezPt != None):
seg = [prevBezPt[1], prevBezPt[2], bezierPt[0], bezierPt[1]]
part.append(seg)
prevBezPt = bezierPt
parts.append(part)
return parts
def getCubicSuperFromParts(parts):
cbsuper = []
for part in parts:
subpath = []
lastPt = None
pt = None
for seg in part:
if(pt == None):
ptLeft = seg[0]
pt = seg[0]
ptRight = seg[1]
subpath.append([ptLeft, pt, ptRight])
ptLeft = seg[2]
pt = seg[3]
subpath.append([ptLeft, pt, pt])
cbsuper.append(subpath)
return cbsuper
def getArrangedIds(pathMap, startPathId):
nextPathId = startPathId
orderPathIds = [nextPathId]
#Arrange in order
while(len(orderPathIds) < len(pathMap)):
minDist = 9e+100 #A large float
closestId = None
np = pathMap[nextPathId]
npPts = [np[-1][-1][-1]]
if(len(orderPathIds) == 1):#compare both the ends for the first path
npPts.append(np[0][0][0])
for key in pathMap:
if(key in orderPathIds):
continue
parts = pathMap[key]
start = parts[0][0][0]
end = parts[-1][-1][-1]
for i, npPt in enumerate(npPts):
dist = abs(start[0] - npPt[0]) + abs(start[1] - npPt[1])
if(dist < minDist):
minDist = dist
closestId = key
dist = abs(end[0] - npPt[0]) + abs(end[1] - npPt[1])
if(dist < minDist):
minDist = dist
pathMap[key] = [[[pts for pts in reversed(seg)] for seg in \
reversed(part)] for part in reversed(parts)]
closestId = key
#If start point of the first path is closer reverse its direction
if(i > 0 and closestId == key):
pathMap[nextPathId] = [[[pts for pts in reversed(seg)] for seg in \
reversed(part)] for part in reversed(np)]
orderPathIds.append(closestId)
nextPathId = closestId
return orderPathIds
class JoinPathsOptimEffect(inkex.EffectExtension):
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def add_arguments(self, pars):
pars.add_argument("--optimized", type=inkex.Boolean, default=True)
pars.add_argument("--tab", default="sampling", help="Tab")
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def effect(self):
selections = self.svg.selected
pathNodes = self.document.xpath('//svg:path',namespaces=inkex.NSS)
paths = {p.get('id'): getPartsFromCubicSuper(CubicSuperPath(p.get('d'))) for p in pathNodes }
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#paths.keys() Order disturbed
pathIds = [p.get('id') for p in pathNodes]
if(len(paths) > 1):
if(self.options.optimized):
startPathId = pathIds[0]
pathIds = getArrangedIds(paths, startPathId)
newParts = []
firstElem = None
for key in pathIds:
parts = paths[key]
# ~ parts = getPartsFromCubicSuper(cspath)
start = parts[0][0][0]
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try:
elem = self.svg.selected[key]
if(len(newParts) == 0):
newParts += parts[:]
firstElem = elem
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else:
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if(vectCmpWithMargin(start, newParts[-1][-1][-1], margin = .01)):
newParts[-1] += parts[0]
else:
newSeg = [newParts[-1][-1][-1], newParts[-1][-1][-1], start, start]
newParts[-1].append(newSeg)
newParts[-1] += parts[0]
if(len(parts) > 1):
newParts += parts[1:]
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parent = elem.getparent()
idx = parent.index(elem)
parent.remove(elem)
except:
pass #elem might come from group item - in this case we need to ignore it
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newElem = copy.copy(firstElem)
oldId = firstElem.get('id')
newElem.set('d', CubicSuperPath(getCubicSuperFromParts(newParts)))
newElem.set('id', oldId + '_joined')
parent.insert(idx, newElem)
if __name__ == '__main__':
JoinPathsOptimEffect().run()