teaching machines

Rotating Checkerboard

October 28, 2020 by Chris Johnson. Filed under public, twoville.

Yesterday I posted a checkerboard that reorganized itself by translation. This one reorganizes by rotation.

And here’s the Twoville source code.

  

    step = 20

with export
  size = [512, ~]

with time
  start = 0
  stop = step * 4
  delay = 0.05

for r in -1..11
  for c in -1..11
    if abs(r) % 2 != abs(c) % 2
      // Bottom right
      with polygon()
        stroke.color = :cornflower
        stroke.size = 0.25
        color = :cornflower
        vertex().position = [c, r] * 10
        vertex().position = [c + 1, r] * 10
        vertex().position = [c + 1, r + 1] * 10
        with rotate()
          pivot = [c + 1, r] * 10
          0 -> step * 1 -> t
            degrees = 0 
          t -> step * 2 -> step * 3 -> t
            degrees = -90
          t -> step * 4 //-> step * 5 -> t
            degrees = -180
      // Top left
      with polygon()
        stroke.color = :cornflower
        stroke.size = 0.25
        color = :cornflower
        vertex().position = [c, r] * 10
        vertex().position = [c + 1, r + 1] * 10
        vertex().position = [c, r + 1] * 10
        with rotate()
          pivot = [c, r + 1] * 10
          0 -> step * 1 -> t
            degrees = 0
          t -> step * 2 -> step * 3 -> t
            degrees = -90
          t -> step * 4 //-> step * 5 -> t
            degrees = -180

    
    
    
  
  
    

    step = 20

with export
  size = [512, ~]

with time
  start = 0
  stop = step * 4
  delay = 0.05

for r in -1..11
  for c in -1..11
    if abs(r) % 2 != abs(c) % 2
      // Bottom right
      with polygon()
        stroke.color = :cornflower
        stroke.size = 0.25
        color = :cornflower
        vertex().position = [c, r] * 10
        vertex().position = [c + 1, r] * 10
        vertex().position = [c + 1, r + 1] * 10
        with rotate()
          pivot = [c + 1, r] * 10
          0 -> step * 1 -> t
            degrees = 0 
          t -> step * 2 -> step * 3 -> t
            degrees = -90
          t -> step * 4 //-> step * 5 -> t
            degrees = -180
      // Top left
      with polygon()
        stroke.color = :cornflower
        stroke.size = 0.25
        color = :cornflower
        vertex().position = [c, r] * 10
        vertex().position = [c + 1, r + 1] * 10
        vertex().position = [c, r + 1] * 10
        with rotate()
          pivot = [c, r + 1] * 10
          0 -> step * 1 -> t
            degrees = 0
          t -> step * 2 -> step * 3 -> t
            degrees = -90
          t -> step * 4 //-> step * 5 -> t
            degrees = -180

  
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