![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
index a6848320d9b9c7cb9c5a68e89c4f50d320313f19..df63f38fd5bde7d814a1e903a7aa5a043c79952d 100755 (executable)
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
-import inkex, simplestyle, pturtle
+import inkex, simplestyle, pturtle, random
+
+def stripme(s):
+ return s.strip()
class LSystem(inkex.Effect):
- def __init__(self):
- inkex.Effect.__init__(self)
- self.OptionParser.add_option("-o", "--order",
- action="store", type="int",
- dest="order", default=3,
- help="number of iteration")
- self.OptionParser.add_option("-a", "--angle",
- action="store", type="float",
- dest="angle", default=16.0,
- help="angle for turn commands")
- self.OptionParser.add_option("-s", "--step",
- action="store", type="float",
- dest="step", default=25.0,
- help="step size")
- self.OptionParser.add_option("-x", "--axiom",
- action="store", type="string",
- dest="axiom", default="++F",
- help="initial state of system")
- self.OptionParser.add_option("-r", "--rules",
- action="store", type="string",
- dest="rules", default="F=FF-[-F+F+F]+[+F-F-F]",
- help="replacement rules")
- self.stack = []
- self.turtle = pturtle.pTurtle()
- def iterate(self):
- self.rules = dict([i.split("=") for i in self.options.rules.upper().split(";") if i.count("=")==1])
- self.__recurse(self.options.axiom.upper(),0)
- return self.turtle.getPath()
- def __recurse(self,rule,level):
- for c in rule:
- if level < self.options.order:
- try:
- self.__recurse(self.rules[c],level+1)
- except KeyError:
- pass
-
- if c == 'F':
- self.turtle.pd()
- self.turtle.fd(self.options.step)
- elif c == 'G':
- self.turtle.pu()
- self.turtle.fd(self.options.step)
- elif c == '+':
- self.turtle.lt(self.options.angle)
- elif c == '-':
- self.turtle.rt(self.options.angle)
- elif c == '|':
- self.turtle.lt(180)
- elif c == '[':
- self.stack.append([self.turtle.getpos(), self.turtle.getheading()])
- elif c == ']':
- self.turtle.pu()
- pos,heading = self.stack.pop()
- self.turtle.setpos(pos)
- self.turtle.setheading(heading)
- def effect(self):
- new = self.document.createElement('svg:path')
- s = {'stroke-linejoin': 'miter', 'stroke-width': '1.0px',
- 'stroke-opacity': '1.0', 'fill-opacity': '1.0',
- 'stroke': '#000000', 'stroke-linecap': 'butt',
- 'fill': 'none'}
- new.setAttribute('style', simplestyle.formatStyle(s))
- new.setAttribute('d', self.iterate())
- self.document.documentElement.appendChild(new)
+ def __init__(self):
+ inkex.Effect.__init__(self)
+ self.OptionParser.add_option("-o", "--order",
+ action="store", type="int",
+ dest="order", default=3,
+ help="number of iteration")
+ self.OptionParser.add_option("-l", "--langle",
+ action="store", type="float",
+ dest="langle", default=16.0,
+ help="angle for turning left")
+ self.OptionParser.add_option("-r", "--rangle",
+ action="store", type="float",
+ dest="rangle", default=16.0,
+ help="angle for turning right")
+ self.OptionParser.add_option("-s", "--step",
+ action="store", type="float",
+ dest="step", default=25.0,
+ help="step size")
+ self.OptionParser.add_option("-p", "--randomizestep",
+ action="store", type="float",
+ dest="randomizestep", default=0.0,
+ help="randomize step")
+ self.OptionParser.add_option("-z", "--randomizeangle",
+ action="store", type="float",
+ dest="randomizeangle", default=0.0,
+ help="randomize angle")
+ self.OptionParser.add_option("-x", "--axiom",
+ action="store", type="string",
+ dest="axiom", default="++F",
+ help="initial state of system")
+ self.OptionParser.add_option("-u", "--rules",
+ action="store", type="string",
+ dest="rules", default="F=FF-[-F+F+F]+[+F-F-F]",
+ help="replacement rules")
+ self.stack = []
+ self.turtle = pturtle.pTurtle()
+ def iterate(self):
+ self.rules = dict([map(stripme, i.split("=")) for i in self.options.rules.upper().split(";") if i.count("=")==1])
+ string = self.__recurse(self.options.axiom.upper(),0)
+ self.__compose_path(string)
+ return self.turtle.getPath()
+ def __compose_path(self, string):
+ self.turtle.pu()
+ self.turtle.setpos(self.view_center)
+ self.turtle.pd()
+ for c in string:
+ if c in 'ABCDEF':
+ self.turtle.pd()
+ self.turtle.fd(self.options.step * (random.normalvariate(1.0, 0.01 * self.options.randomizestep)))
+ elif c in 'GHIJKL':
+ self.turtle.pu()
+ self.turtle.fd(self.options.step * (random.normalvariate(1.0, 0.01 * self.options.randomizestep)))
+ elif c == '+':
+ self.turtle.lt(self.options.langle * (random.normalvariate(1.0, 0.01 * self.options.randomizeangle)))
+ elif c == '-':
+ self.turtle.rt(self.options.rangle * (random.normalvariate(1.0, 0.01 * self.options.randomizeangle)))
+ elif c == '|':
+ self.turtle.lt(180)
+ elif c == '[':
+ self.stack.append([self.turtle.getpos(), self.turtle.getheading()])
+ elif c == ']':
+ self.turtle.pu()
+ pos,heading = self.stack.pop()
+ self.turtle.setpos(pos)
+ self.turtle.setheading(heading)
+
+ def __recurse(self,rule,level):
+ level_string = ''
+ for c in rule:
+ if level < self.options.order:
+ try:
+ level_string = level_string + self.__recurse(self.rules[c],level+1)
+ except KeyError:
+ level_string = level_string + c
+ else:
+ level_string = level_string + c
+ return level_string
+
+ def effect(self):
+ new = self.document.createElement('svg:path')
+ s = {'stroke-linejoin': 'miter', 'stroke-width': '1.0px',
+ 'stroke-opacity': '1.0', 'fill-opacity': '1.0',
+ 'stroke': '#000000', 'stroke-linecap': 'butt',
+ 'fill': 'none'}
+ new.setAttribute('style', simplestyle.formatStyle(s))
+ new.setAttribute('d', self.iterate())
+ self.current_layer.appendChild(new)
e = LSystem()
e.affect()
+