share/extensions/pturtle.py

   1 #!/usr/bin/env python
   2 '''
   3 Copyright (C) 2005 Aaron Spike, aaron@ekips.org
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 '''
  19 import math
  20 class pTurtle:
  21     '''A Python path turtle'''
  22     def __init__(self, home=(0,0)):
  23         self.__home = [home[0], home[1]]
  24         self.__pos = self.__home[:]
  25         self.__heading = -90
  26         self.__path = ""
  27         self.__draw = True
  28         self.__new = True
  29     def forward(self,mag):
  30         self.setpos((self.__pos[0] + math.cos(math.radians(self.__heading))*mag,
  31             self.__pos[1] + math.sin(math.radians(self.__heading))*mag))
  32     def backward(self,mag):
  33         self.setpos((self.__pos[0] - math.cos(math.radians(self.__heading))*mag,
  34             self.__pos[1] - math.sin(math.radians(self.__heading))*mag))
  35     def right(self,deg):
  36         self.__heading -= deg
  37     def left(self,deg):
  38         self.__heading += deg
  39     def penup(self):
  40         self.__draw = False
  41         self.__new = False
  42     def pendown(self):
  43         if not self.__draw:
  44             self.__new = True
  45         self.__draw = True
  46     def pentoggle(self):
  47         if self.__draw:
  48             self.penup()
  49         else:
  50             self.pendown()
  51     def home(self):
  52         self.setpos(self.__home)
  53     def clean(self):
  54         self.__path = ''
  55     def clear(self):
  56         self.clean()
  57         self.home()
  58     def setpos(self,(x,y)):
  59         if self.__new:
  60             self.__path += "M"+",".join([str(i) for i in self.__pos])
  61             self.__new = False
  62         self.__pos = [x, y]
  63         if self.__draw:
  64             self.__path += "L"+",".join([str(i) for i in self.__pos])
  65     def getpos(self):
  66         return self.__pos[:]
  67     def setheading(self,deg):
  68         self.__heading = deg
  69     def getheading(self):
  70         return self.__heading
  71     def sethome(self,(x,y)):
  72         self.__home = [x, y]
  73     def getPath(self):
  74         return self.__path
  75     fd = forward
  76     bk = backward
  77     rt = right
  78     lt = left
  79     pu = penup
  80     pd = pendown
  81
  82
  83 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99