home *** CD-ROM | disk | FTP | other *** search
/ Amiga Plus Extra 1997 #4 / Amiga Plus Extra 1997 #4.iso / pd / grafik / video easel / xlife / venetian.life < prev    next >
Text File  |  1997-06-09  |  5KB  |  91 lines
  1. #N Venetian blinds
  2. #C This is a finite version of the infinite p2 oscillator
  3. #C in which rows alternate full, full, empty, empty,
  4. #C full, full, ...  Two types of edges are shown, one
  5. #C perpendicular to the rows and one at a 45 degree
  6. #C angle.  (It's easy to prove that there's no p2 edge
  7. #C parallel to the rows.)  Also shown are 3 type of
  8. #C corners where the edges meet.  This partly answers a
  9. #C question of John Conway's:  What's the maximum average
  10. #C density of an infinite p2 pattern, and can it be
  11. #C obtained as a limit of finite p2 patterns?  This shows
  12. #C that 1/2 is a lower bound.  Hartmut Holzwart showed
  13. #C that 8/13 is an upper bound.
  14. #O Dean Hickerson, drhickerson@ucdavis.edu  9/13/92
  15. #P -31 -36
  16. ..................*.**.**......*......**.**.*
  17. ..................**.*.*...**.*.*.**...*.*.**
  18. .....................*...*..*.*.*.*..*...*
  19. .....................*..***...*.*...***..*
  20. ....................**.*.....*.*.*.....*.**
  21. .......................*..**.*...*.**..*
  22. ....................**..***..**.**..***..**
  23. ................**.*.**...**.*****.**...**.*.**
  24. **.**...**......**.**....*...........*....**.**
  25. .*.*...*.*.........*..**.*.*.......*.*.**..*
  26. .*..*..*........**..***..**.*******.**..***..**
  27. ..*.*.*..*..**.*.**...**.*************.**...**.*.**
  28. ...*.**.**..**.**....*...................*....**.**
  29. .....**........*..**.*.*...............*.*.**..*
  30. ....*.......**..***..**.***************.**..***..**
  31. ..***.*.**.*.**...**.*********************.**...**.*.**
  32. .*...***.*.**....*...........................*....**.**
  33. .***...*...*..**.*.*.......................*.*.**..*
  34. ....**...*..***..**.***********************.**..***..**
  35. ...*..*.***...**.*****************************.**...**.*.**..**
  36. ...*.**.*....*...................................*....**.**...*..*
  37. ....**.**.**.*.*...............................*.*.**..*......*.*.*
  38. .........**..**.*******************************.**..***..**..**.*..*
  39. ....**..*.**.*************************************.**...**.*....**.*
  40. ....*..*.*...........................................*....**.**...**.**
  41. ......**.*.*.......................................*.*.**..*.*.**...*.*
  42. ..........*.***************************************.**..***..*.*.**.*
  43. .........**.******************************************.**...****..*.*
  44. ....*.**.*.*.............................................*.......*..**
  45. ....**.*.*.............................................*.*.**....*.*..*
  46. ...........********************************************.**..*****..*.*
  47. .........*...*********************************************.***..***.*
  48. .............................................................*..*.*
  49. ........*.*.*..............................................*.*..*.*.*
  50. ....**.*...*.**********************************************.**.*...**
  51. ....*.**.*.***************************************************
  52. ........*.*
  53. #P -31 1
  54. ........*.*
  55. ....*.**.*.***************************************************
  56. ....**.*...*.**********************************************.**.*...**
  57. ........*.*.*..............................................*.*..*.*.*
  58. .............................................................*..*.*
  59. .........*...*********************************************.***..***.*
  60. ...........********************************************.**..*****..*.*
  61. ....**.*.*.............................................*.*.**....*.*..*
  62. ....*.**.*.*.............................................*.......*..**
  63. .........**.******************************************.**...****..*.*
  64. ..........*.***************************************.**..***..*.*.**.*
  65. ......**.*.*.......................................*.*.**..*.*.**...*.*
  66. ....*..*.*...........................................*....**.**...**.**
  67. ....**..*.**.*************************************.**...**.*....**.*
  68. .........**..**.*******************************.**..***..**..**.*..*
  69. ....**.**.**.*.*...............................*.*.**..*......*.*.*
  70. ...*.**.*....*...................................*....**.**...*..*
  71. ...*..*.***...**.*****************************.**...**.*.**..**
  72. ....**...*..***..**.***********************.**..***..**
  73. .***...*...*..**.*.*.......................*.*.**..*
  74. .*...***.*.**....*...........................*....**.**
  75. ..***.*.**.*.**...**.*********************.**...**.*.**
  76. ....*.......**..***..**.***************.**..***..**
  77. .....**........*..**.*.*...............*.*.**..*
  78. ...*.**.**..**.**....*...................*....**.**
  79. ..*.*.*..*..**.*.**...**.*************.**...**.*.**
  80. .*..*..*........**..***..**.*******.**..***..**
  81. .*.*...*.*.........*..**.*.*.......*.*.**..*
  82. **.**...**......**.**....*...........*....**.**
  83. ................**.*.**...**.*****.**...**.*.**
  84. ....................**..***..**.**..***..**
  85. .......................*..**.*...*.**..*
  86. ....................**.*.....*.*.*.....*.**
  87. .....................*..***...*.*...***..*
  88. .....................*...*..*.*.*.*..*...*
  89. ..................**.*.*...**.*.*.**...*.*.**
  90. ..................*.**.**......*......**.**.*
  91.