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L-Systems 0.0.3

jeffwincek Dec 15th, 2011 29 Never
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  1. from turtle import *
  2.  
  3.  
  4. axiomA='A'
  5. rulesA = {}
  6. rulesA['A'] = 'AB'
  7. rulesA['B'] = 'A'
  8.  
  9. axiomB='B'
  10. rulesB = {}
  11. rulesB['B'] = 'BA'
  12. rulesB['A'] = 'B'
  13.  
  14. axiomF='F'
  15. rulesF = {}
  16. rulesF['F'] = 'F+F-F-F+F'
  17. turtleRulesF = {}
  18. turtleRulesF['F'] = 'forward(10)'
  19. turtleRulesF['+'] = 'left(90)'
  20. turtleRulesF['-'] = 'right(90)'
  21.  
  22. axiomS='A'
  23. rulesS = {}
  24. rulesS['A'] = 'B-A-B'
  25. rulesS['B'] = 'A+B+A'
  26. turtleRulesS = {}
  27. turtleRulesS['A'] = 'forward(5)'
  28. turtleRulesS['B'] = 'forward(5)'
  29. turtleRulesS['+'] = 'left(60)'
  30. turtleRulesS['-'] = 'right(60)'
  31.  
  32.  
  33.  
  34. def compose(axiom, rules):
  35.         output = ""
  36.         for i in axiom:
  37.             output = output + rules.get(i,i)
  38.         return output
  39.  
  40. def iterate(axiom,rules, times):
  41.     output = ''
  42.     if times == 0:
  43.         output = axiom
  44.     else:
  45.         return iterate(compose(axiom, rules), rules, times -1)
  46.     return output
  47.  
  48. #print iterate(axiomA,rulesB,6)
  49. #print iterate(axiomB,rulesA,6)
  50. #directions = iterate(axiomF,rulesF,3)
  51. #print directions
  52.  
  53. def evaluate(axiom,rules,turtleRules,times):
  54.     for words in iterate(axiom,rules,times):
  55.         eval(turtleRules[words])
  56.  
  57. speed(0)
  58. setx(-200)
  59. color('red','yellow')
  60. begin_fill()
  61. evaluate(axiomS,rulesS,turtleRulesS,6)
  62. end_fill()
  63. done()
  64.  
  65. #special thanks to http://www.4dsolutions.net/ocn/lsystems.html
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