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mightyscape-0.92-deprecated/extensions/fablabchemnitz_zigzag.py
2019-11-14 20:09:28 +01:00

91 lines
3.3 KiB
Python

#!/usr/bin/env python
'''
zigzag.py
Sunabe kazumichi 2009/9/29
http://dp48069596.lolipop.jp/
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
this program shifts the nodes zigzags.
'''
import random, math, inkex, cubicsuperpath
def pointdistance((x1,y1),(x2,y2)):
dist=math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2))
if dist==0:
dx=0
dy=0
else:
dx=(x2 - x1)/dist
dy=(y2 - y1)/dist
return dx,dy
def randomize((x,y), r):
if y==0:
a=math.pi
elif x==0 and y<>0:
a=math.pi/2
else:
a = math.atan2(y,x)
x = math.cos(a-math.pi/2)*r
y = math.sin(a-math.pi/2)*r
return [x, y]
class RadiusRandomize(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
self.OptionParser.add_option("--title")
self.OptionParser.add_option("-r", "--radius",
action="store", type="float",
dest="radius", default=10.0,
help="Randomly move control and end points in this radius")
self.OptionParser.add_option("-e", "--end",
action="store", type="inkbool",
dest="end", default=True,
help="Randomize nodes")
def effect(self):
for id, node in self.selected.iteritems():
if node.tag == inkex.addNS('path','svg'):
d = node.get('d')
p = cubicsuperpath.parsePath(d)
for subpath in p:
for i, csp in enumerate(subpath):
if self.options.end:
if i % 2 <> 0:
dx,dy=pointdistance(csp[0],csp[1])
delta=randomize( (dx, dy),self.options.radius)
csp[0][0]+=delta[0]
csp[0][1]+=delta[1]
csp[1][0]+=delta[0]
csp[1][1]+=delta[1]
csp[2][0]+=delta[0]
csp[2][1]+=delta[1]
else:
dx,dy=pointdistance(csp[0],csp[1])
delta=randomize( (dx, dy),self.options.radius)
csp[0][0]-=delta[0]
csp[0][1]-=delta[1]
csp[1][0]-=delta[0]
csp[1][1]-=delta[1]
csp[2][0]-=delta[0]
csp[2][1]-=delta[1]
node.set('d',cubicsuperpath.formatPath(p))
e = RadiusRandomize()
e.affect()