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#!/usr/bin/env python
'''
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
import math
class pTurtle:
'''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,(x,y)):
if self.__new:
self.__path += "M"+",".join([str(i) for i in self.__pos])
self.__new = False
self.__pos = [x, y]
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,(x,y)):
self.__home = [x, y]
def getPath(self):
return self.__path
fd = forward
bk = backward
rt = right
lt = left
pu = penup
pd = pendown
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