278 lines
17 KiB
Python
278 lines
17 KiB
Python
#!/usr/bin/env python3
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"""
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Extension for InkScape 1.0
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Features
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- helps to find contours which are closed or not. Good for repairing contours, closing contours,...
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- works for paths which are packed into groups or groups of groups. #
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- can break contours apart like in "Path -> Break Apart"
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- implements Bentley-Ottmann algorithm from https://github.com/ideasman42/isect_segments-bentley_ottmann to scan for self-intersecting paths. You might get "assert(event.in_sweep == False) AssertionError". Don't know how to fix rgis
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- colorized paths respective to their type
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- can add dots to intersection points you'd like to fix
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Author: Mario Voigt / FabLab Chemnitz
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Mail: mario.voigt@stadtfabrikanten.org
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Date: 09.08.2020
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Last patch: 05.09.2020
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License: GNU GPL v3
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"""
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from math import *
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import inkex
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from inkex.paths import Path, CubicSuperPath
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from inkex import Style, Color, Circle
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from lxml import etree
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import poly_point_isect
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import copy
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class ContourScanner(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("--breakapart", type=inkex.Boolean, default=False, help="Break apart selection into single contours")
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self.arg_parser.add_argument("--removefillsetstroke", type=inkex.Boolean, default=False, help="Remove fill and define stroke")
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self.arg_parser.add_argument("--strokewidth", type=float, default=1.0, help="Stroke width (px)")
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self.arg_parser.add_argument("--highlight_opened", type=inkex.Boolean, default=True, help="Highlight opened contours")
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self.arg_parser.add_argument("--color_opened", type=Color, default='4012452351', help="Color opened contours")
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self.arg_parser.add_argument("--highlight_closed", type=inkex.Boolean, default=True, help="Highlight closed contours")
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self.arg_parser.add_argument("--color_closed", type=Color, default='2330080511', help="Color closed contours")
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self.arg_parser.add_argument("--highlight_selfintersecting", type=inkex.Boolean, default=True, help="Highlight self-intersecting contours")
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self.arg_parser.add_argument("--highlight_intersectionpoints", type=inkex.Boolean, default=True, help="Highlight self-intersecting points")
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self.arg_parser.add_argument("--color_selfintersecting", type=Color, default='1923076095', help="Color closed contours")
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self.arg_parser.add_argument("--color_intersectionpoints", type=Color, default='4239343359', help="Color closed contours")
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self.arg_parser.add_argument("--addlines", type=inkex.Boolean, default=True, help="Add closing lines for self-crossing contours")
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self.arg_parser.add_argument("--polypaths", type=inkex.Boolean, default=True, help="Add polypath outline for self-crossing contours")
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self.arg_parser.add_argument("--dotsize", type=int, default=10, help="Dot size (px) for self-intersecting points")
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self.arg_parser.add_argument("--remove_opened", type=inkex.Boolean, default=False, help="Remove opened contours")
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self.arg_parser.add_argument("--remove_closed", type=inkex.Boolean, default=False, help="Remove closed contours")
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self.arg_parser.add_argument("--remove_selfintersecting", type=inkex.Boolean, default=False, help="Remove self-intersecting contours")
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self.arg_parser.add_argument("--main_tabs")
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#function to refine the style of the lines
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def adjustStyle(self, node):
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if node.attrib.has_key('style'):
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style = node.get('style')
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if style:
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declarations = style.split(';')
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for i,decl in enumerate(declarations):
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parts = decl.split(':', 2)
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if len(parts) == 2:
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(prop, val) = parts
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prop = prop.strip().lower()
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if prop == 'stroke-width':
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declarations[i] = prop + ':' + str(self.svg.unittouu(str(self.options.strokewidth) +"px"))
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if prop == 'fill':
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declarations[i] = prop + ':none'
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node.set('style', ';'.join(declarations) + ';stroke:#000000;stroke-opacity:1.0')
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else:
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node.set('style', 'stroke:#000000;stroke-opacity:1.0')
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#get polyline from path
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def getPolyline(self, node):
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if node.tag == inkex.addNS('path','svg'):
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polypath = []
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i = 0
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for x, y in node.path.end_points:
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if i == 0:
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polypath.append(['M', [x,y]])
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else:
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polypath.append(['L', [x,y]])
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if i == 1 and polypath[len(polypath)-2][1] == polypath[len(polypath)-1][1]:
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polypath.pop(len(polypath)-1) #special handling for the seconds point after M command
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elif polypath[len(polypath)-2] == polypath[len(polypath)-1]: #get the previous point
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polypath.pop(len(polypath)-1)
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i += 1
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return Path(polypath)
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#split combined contours into single contours if enabled - this is exactly the same as "Path -> Break Apart"
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replacedNodes = []
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def breakContours(self, node): #this does the same as "CTRL + SHIFT + K"
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if node.tag == inkex.addNS('path','svg'):
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parent = node.getparent()
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idx = parent.index(node)
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idSuffix = 0
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raw = Path(node.get("d")).to_arrays()
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subPaths, prev = [], 0
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for i in range(len(raw)): # Breaks compound paths into simple paths
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if raw[i][0] == 'M' and i != 0:
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subPaths.append(raw[prev:i])
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prev = i
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subPaths.append(raw[prev:])
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for subpath in subPaths:
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replacedNode = copy.copy(node)
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oldId = replacedNode.get('id')
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replacedNode.set('d', CubicSuperPath(subpath))
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replacedNode.set('id', oldId + str(idSuffix).zfill(5))
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parent.insert(idx, replacedNode)
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idSuffix += 1
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self.replacedNodes.append(replacedNode)
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parent.remove(node)
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for child in node:
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self.breakContours(child)
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def scanContours(self, node):
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if node.tag == inkex.addNS('path','svg'):
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if self.options.removefillsetstroke:
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self.adjustStyle(node)
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intersectionGroup = node.getparent().add(inkex.Group())
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raw = (Path(node.get('d')).to_arrays())
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subPaths, prev = [], 0
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for i in range(len(raw)): # Breaks compound paths into simple paths
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if raw[i][0] == 'M' and i != 0:
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subPaths.append(raw[prev:i])
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prev = i
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subPaths.append(raw[prev:])
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for simpath in subPaths:
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closed = False
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if simpath[-1][0] == 'Z':
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closed = True
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if simpath[-2][0] == 'L': simpath[-1][1] = simpath[0][1]
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else: simpath.pop()
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points = []
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for i in range(len(simpath)):
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if simpath[i][0] == 'V': # vertical and horizontal lines only have one point in args, but 2 are required
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simpath[i][0]='L' #overwrite V with regular L command
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add=simpath[i-1][1][0] #read the X value from previous segment
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simpath[i][1].append(simpath[i][1][0]) #add the second (missing) argument by taking argument from previous segment
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simpath[i][1][0]=add #replace with recent X after Y was appended
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if simpath[i][0] == 'H': # vertical and horizontal lines only have one point in args, but 2 are required
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simpath[i][0]='L' #overwrite H with regular L command
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simpath[i][1].append(simpath[i-1][1][1]) #add the second (missing) argument by taking argument from previous segment
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points.append(simpath[i][1][-2:])
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if points[0] == points[-1]: #if first is last point the path is also closed. The "Z" command is not required
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closed = True
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if closed == False:
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if self.options.highlight_opened:
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style = {'stroke-linejoin': 'miter', 'stroke-width': str(self.svg.unittouu(str(self.options.strokewidth) +"px")),
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'stroke-opacity': '1.0', 'fill-opacity': '1.0',
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'stroke': self.options.color_opened, 'stroke-linecap': 'butt', 'fill': 'none'}
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node.attrib['style'] = Style(style).to_str()
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if self.options.remove_opened:
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try:
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node.getparent().remove(node)
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except AttributeError:
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pass #we ignore that parent can be None
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if closed == True:
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if self.options.highlight_closed:
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style = {'stroke-linejoin': 'miter', 'stroke-width': str(self.svg.unittouu(str(self.options.strokewidth) +"px")),
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'stroke-opacity': '1.0', 'fill-opacity': '1.0',
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'stroke': self.options.color_closed, 'stroke-linecap': 'butt', 'fill': 'none'}
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node.attrib['style'] = Style(style).to_str()
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if self.options.remove_closed:
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try:
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node.getparent().remove(node)
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except AttributeError:
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pass #we ignore that parent can be None
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#if one of the options is activated we also check for self-intersecting
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if self.options.highlight_selfintersecting or self.options.highlight_intersectionpoints:
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#Style definitions
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closingLineStyle = Style({'stroke-linejoin': 'miter', 'stroke-width': str(self.svg.unittouu(str(self.options.strokewidth) +"px")),
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'stroke-opacity': '1.0', 'fill-opacity': '1.0',
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'stroke': self.options.color_intersectionpoints, 'stroke-linecap': 'butt', 'fill': 'none'}).to_str()
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intersectionPointStyle = Style({'stroke': 'none', 'fill': self.options.color_intersectionpoints}).to_str()
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intersectionStyle = Style({'stroke-linejoin': 'miter', 'stroke-width': str(self.svg.unittouu(str(self.options.strokewidth) +"px")),
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'stroke-opacity': '1.0', 'fill-opacity': '1.0',
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'stroke': self.options.color_selfintersecting, 'stroke-linecap': 'butt', 'fill': 'none'}).to_str()
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try:
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if len(points) > 2: #try to find self-intersecting /overlapping polygons. We need at least 3 points to detect for intersections (only possible if first points matched last point)
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isect = poly_point_isect.isect_polygon(points)
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if len(isect) > 0:
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if closed == False and self.options.addlines == True: #if contour is open and we found intersection points those points might be not relevant
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closingLine = intersectionGroup.add(inkex.PathElement())
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closingLine.set('id', self.svg.get_unique_id('closingline-'))
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closingLine.path = [
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['M', [points[0][0],points[0][1]]],
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['L', [points[-1][0],points[-1][1]]],
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['Z', []]
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]
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closingLine.attrib['style'] = closingLineStyle
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#draw polylines if option is enabled
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if self.options.polypaths == True:
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polyNode = intersectionGroup.add(inkex.PathElement())
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polyNode.set('id', self.svg.get_unique_id('polypath-'))
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polyNode.set('d', str(self.getPolyline(node)))
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polyNode.attrib['style'] = closingLineStyle
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#make dot markings at the intersection points
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if self.options.highlight_intersectionpoints:
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for xy in isect:
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#Add a dot label for this path element
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intersectionPoint = intersectionGroup.add(Circle(cx=str(xy[0]), cy=str(xy[1]), r=str(self.svg.unittouu(str(self.options.dotsize/2) + "px"))))
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intersectionPoint.set('id', self.svg.get_unique_id('intersectionpoint-'))
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intersectionPoint.style = intersectionPointStyle
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if self.options.highlight_selfintersecting:
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node.attrib['style'] = intersectionStyle
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if self.options.remove_selfintersecting:
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if node.getparent() is not None: #might be already been deleted by previously checked settings so check again
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node.getparent().remove(node)
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#draw intersections segment lines - useless at the moment. We could use this information to cut the original polyline to get a new curve path which included the intersection points
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#isectSegs = poly_point_isect.isect_polygon_include_segments(points)
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#for seg in isectSegs:
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# isectSegsPath = []
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# isecX = seg[0][0] #the intersection point - X
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# isecY = seg[0][1] #the intersection point - Y
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# isecSeg1X = seg[1][0][0][0] #the first intersection point segment - X
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# isecSeg1Y = seg[1][0][0][1] #the first intersection point segment - Y
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# isecSeg2X = seg[1][1][0][0] #the second intersection point segment - X
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# isecSeg2Y = seg[1][1][0][1] #the second intersection point segment - Y
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# isectSegsPath.append(['L', [isecSeg2X, isecSeg2Y]])
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# isectSegsPath.append(['L', [isecX, isecY]])
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# isectSegsPath.append(['L', [isecSeg1X, isecSeg1Y]])
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# #fix the really first point. Has to be an 'M' command instead of 'L'
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# isectSegsPath[0][0] = 'M'
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# polySegsNode = intersectionGroup.add(inkex.PathElement())
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# polySegsNode.set('id', self.svg.get_unique_id('intersectsegments-'))
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# polySegsNode.set('d', str(Path(isectSegsPath)))
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# polySegsNode.attrib['style'] = closingLineStyle
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except AssertionError as e: # we skip AssertionError
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#inkex.utils.debug("Error: " + str(e))
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continue
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#if the intersectionGroup was created but nothing attached we delete it again to prevent messing the SVG XML tree
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if len(intersectionGroup.getchildren()) == 0:
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intersectionGroupParent = intersectionGroup.getparent()
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if intersectionGroupParent is not None:
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intersectionGroup.getparent().remove(intersectionGroup)
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#put the node into the intersectionGroup to bundle the path with it's error markers. If removal is selected we need to avoid intersectionGroup.insert(), because it will break the removal
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elif self.options.remove_selfintersecting == False:
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intersectionGroup.insert(0, node)
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children = node.getchildren()
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if children is not None:
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for child in children:
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self.scanContours(child)
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def effect(self):
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if self.options.breakapart:
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if len(self.svg.selected) == 0:
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self.breakContours(self.document.getroot())
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self.scanContours(self.document.getroot())
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else:
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newContourSet = []
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for id, item in self.svg.selected.items():
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self.breakContours(item)
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for newContours in self.replacedNodes:
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self.scanContours(newContours)
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else:
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if len(self.svg.selected) == 0:
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self.scanContours(self.document.getroot())
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else:
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for id, item in self.svg.selected.items():
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self.scanContours(item)
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if __name__ == '__main__':
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ContourScanner().run() |