85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
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#!/usr/bin/env python3
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'''
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zigzag.py
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Sunabe kazumichi 2009/9/29
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http://dp48069596.lolipop.jp/
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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
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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this program shifts the nodes zigzags.
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'''
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import random
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import math
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import inkex
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from inkex import CubicSuperPath
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def pointdistance(x1, y1, x2, y2):
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dist=math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
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if dist==0:
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dx=0
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dy=0
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else:
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dx=(x2 - x1)/dist
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dy=(y2 - y1)/dist
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return dx,dy
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def randomize(x,y, r):
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if y == 0:
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a = math.pi
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elif x == 0 and y != 0:
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a = math.pi/2
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else:
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a = math.atan2(y,x)
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x = math.cos(a-math.pi/2)*r
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y = math.sin(a-math.pi/2)*r
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return [x, y]
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class ZigzagNodes(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument("--title")
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pars.add_argument("--radius", type=float, default=10.0, help="Randomly move control and end points in this radius")
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def effect(self):
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for id, node in self.svg.selected.items():
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if node.tag == inkex.addNS('path','svg'):
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d = node.get('d')
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p = CubicSuperPath(d)
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for subpath in p:
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for i, csp in enumerate(subpath):
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if i % 2 != 0:
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dx,dy=pointdistance(csp[0][0], csp[0][1], csp[1][0], csp[1][1])
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delta=randomize(dx, dy, self.options.radius)
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csp[0][0]+=delta[0]
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csp[0][1]+=delta[1]
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csp[1][0]+=delta[0]
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csp[1][1]+=delta[1]
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csp[2][0]+=delta[0]
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csp[2][1]+=delta[1]
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else:
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dx,dy=pointdistance(csp[0][0], csp[0][1], csp[1][0], csp[1][1])
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delta=randomize(dx, dy, self.options.radius)
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csp[0][0]-=delta[0]
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csp[0][1]-=delta[1]
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csp[1][0]-=delta[0]
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csp[1][1]-=delta[1]
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csp[2][0]-=delta[0]
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csp[2][1]-=delta[1]
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node.set('d', CubicSuperPath(p))
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if __name__ == '__main__':
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ZigzagNodes().run()
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