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# coding=utf-8
#
# Copyright (C) 2005 Aaron Spike, aaron@ekips.org
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
import math
import random
class pTurtle(object):
"""A Python path turtle"""
def __init__(self, home=(0, 0)):
self.__home = [home[0], home[1]]
self.__pos = self.__home[:]
self.__heading = -90
self.__path = ""
self.__draw = True
self.__new = True
def forward(self, mag):
self.setpos((self.__pos[0] + math.cos(math.radians(self.__heading)) * mag,
self.__pos[1] + math.sin(math.radians(self.__heading)) * mag))
def backward(self, mag):
self.setpos((self.__pos[0] - math.cos(math.radians(self.__heading)) * mag,
self.__pos[1] - math.sin(math.radians(self.__heading)) * mag))
def right(self, deg):
self.__heading -= deg
def left(self, deg):
self.__heading += deg
def penup(self):
self.__draw = False
self.__new = False
def pendown(self):
if not self.__draw:
self.__new = True
self.__draw = True
def pentoggle(self):
if self.__draw:
self.penup()
else:
self.pendown()
def home(self):
self.setpos(self.__home)
def clean(self):
self.__path = ''
def clear(self):
self.clean()
self.home()
def setpos(self, arg):
if self.__new:
self.__path += "M" + ",".join([str(i) for i in self.__pos])
self.__new = False
self.__pos = arg
if self.__draw:
self.__path += "L" + ",".join([str(i) for i in self.__pos])
def getpos(self):
return self.__pos[:]
def setheading(self, deg):
self.__heading = deg
def getheading(self):
return self.__heading
def sethome(self, arg):
self.__home = list(arg)
def getPath(self):
return self.__path
def rtree(self, size, minimum, pt=False):
if size < minimum:
return
self.fd(size)
turn = random.uniform(20, 40)
self.lt(turn)
self.rtree(size * random.uniform(0.5, 0.9), minimum, pt)
self.rt(turn)
turn = random.uniform(20, 40)
self.rt(turn)
self.rtree(size * random.uniform(0.5, 0.9), minimum, pt)
self.lt(turn)
if pt:
self.pu()
self.bk(size)
if pt:
self.pd()
fd = forward
bk = backward
rt = right
lt = left
pu = penup
pd = pendown
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