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