bugfix flevobezier
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@ -10,50 +10,53 @@ import inkex
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import gettext
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from inkex.paths import Path
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import sys
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def pout(t): sys.exit((gettext.gettext(t)))
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class FlevoBezier(inkex.EffectExtension):
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def effect(self):
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if len(self.svg.selected) == 0: pout("Please select at least one path.")
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for obj in self.svg.selected: # The objects are the paths, which may be compound
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curr = self.svg.selected[obj]
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raw = Path(curr.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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if len(self.svg.selected) == 0: inkex.utils.debug("Please select at least one path.")
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for element in self.svg.selected: # The objects are the paths, which may be compound
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if element.tag == inkex.addNS('path','svg'):
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curr = self.svg.selected[element]
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raw = Path(curr.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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output = ""
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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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#nodes = [node(simpath[i][1][-2:]) for i in range(len(simpath))]
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nodes = []
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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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#inkex.utils.debug(simpath[i][0])
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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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#inkex.utils.debug(simpath[i][0])
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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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#inkex.utils.debug(simpath[i])
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nodes.append(node(simpath[i][1][-2:]))
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output += flevobezier(nodes, closed)
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curr.set("d", output)
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else:
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inkex.utils.debug("element {} is not a path! Try to degroup / convert before!".format(element.get('id')))
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output = ""
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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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#nodes = [node(simpath[i][1][-2:]) for i in range(len(simpath))]
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nodes = []
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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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#inkex.utils.debug(simpath[i][0])
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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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#inkex.utils.debug(simpath[i][0])
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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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#inkex.utils.debug(simpath[i])
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nodes.append(node(simpath[i][1][-2:]))
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output += flevobezier(nodes, closed)
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curr.set("d", output)
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# The main algorithm! Yay!
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def flevobezier(points, z):
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if len(points) < 2: pout("A curve isn't a point, silly!")
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if len(points) < 2: inkex.utils.debug("A curve isn't a point, silly!")
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res = []
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prevtrail, trail, lead, window = 0, 0, 1, points[:2] # Start with first two points
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maybeover = False # Over by error followed by over by angle -> backup
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@ -66,7 +69,7 @@ def flevobezier(points, z):
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try:
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dist(v) / dist(w)
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except ZeroDivisionError as e:
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pout("Division by zero. Check if your path contains duplicate handles.")
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inkex.utils.debug("Division by zero. Check if your path contains duplicate handles.")
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if dotp(v, w) / dist(v) / dist(w) >= 0.5: # 60 degrees or less, over by angle
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if maybeover: # backup
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newcurve = stress(points[prevtrail:lead])[0]
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@ -124,7 +127,7 @@ def flevobezier(points, z):
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res[t - 1] = res[t] + spin(v, sign * theta)
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res[t + 1] = res[t] + spin(w, -sign * theta)
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except ZeroDivisionError:
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pout("Path has only one point left. Cannot continue")
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inkex.utils.debug("Path has only one point left. Cannot continue")
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res.append(ouro)
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# Formatting and final output
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out = "M " + str(res[0])
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@ -191,7 +194,7 @@ def cubicfrom4(nodes, p = None, q = None):
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x = nodes[1] - (1 - lm) ** 3 * nodes[0] - lm ** 3 * nodes[3]
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y = nodes[2] - (1 - mu) ** 3 * nodes[0] - mu ** 3 * nodes[3]
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det = a * d - b * c
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if not det: pout("Singular matrix!")
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if not det: inkex.utils.debug("Singular matrix!")
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l, m = (d * x - b * y) / det, (a * y - c * x) / det
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return [nodes[0], l, m, nodes[3]]
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