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