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L-Systems 0.0.4

jeffwincek Dec 15th, 2011 37 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(3)'
  28. turtleRulesS['B'] = 'forward(3)'
  29. turtleRulesS['+'] = 'left(60)'
  30. turtleRulesS['-'] = 'right(60)'
  31.  
  32. axiomD='FX'
  33. rulesD={}
  34. rulesD['X']='X+YF'
  35. rulesD['Y']='FX-Y'
  36. turtleRulesD={}
  37. turtleRulesD['F'] = 'forward(5)'
  38. turtleRulesD['-'] = 'left(90)'
  39. turtleRulesD['+'] = 'right(90)'
  40. turtleRulesD['X'] = 'nul'
  41. turtleRulesD['Y'] = 'nul'
  42.  
  43.  
  44. def compose(axiom, rules):
  45.         output = ""
  46.         for i in axiom:
  47.             output = output + rules.get(i,i)
  48.         return output
  49.  
  50. def iterate(axiom,rules, times):
  51.     output = ''
  52.     if times == 0:
  53.         output = axiom
  54.     else:
  55.         return iterate(compose(axiom, rules), rules, times -1)
  56.     return output
  57.  
  58. #print iterate(axiomA,rulesB,6)
  59. #print iterate(axiomB,rulesA,6)
  60. #directions = iterate(axiomF,rulesF,3)
  61. #print directions
  62.  
  63. def evaluate(axiom,rules,turtleRules,times):
  64.     for words in iterate(axiom,rules,times):
  65.         if turtleRules[words] != 'nul':
  66.             eval(turtleRules[words])
  67. screensize(800,800)
  68. speed(0)
  69. pu()
  70. #setx(-400)
  71. #sety(-400)
  72. pd()
  73. color('red','yellow')
  74. #begin_fill()
  75. #evaluate(axiomS,rulesS,turtleRulesS,6)
  76. evaluate(axiomD,rulesD,turtleRulesD,10)
  77. #end_fill()
  78. done()
  79.  
  80. #special thanks to http://www.4dsolutions.net/ocn/lsystems.html
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