Ryan is an engineer in the Sacramento Area with a focus in Python, Ruby, and Rust. Bash/Python Exercism mentor. Coding, physics, calculus, music, woodworking. Looking for work!
This is confusing to look at too, but there's one important phrase that makes it correct:
and the frame of view follows the active cells in each cycle
This thread, makes it more clear. At time t=1, the possible grid is actually 5x5x3. The sample input is just shifted and shrunk to follow the boundary of actual cells.
In other words, for your diagram's time step 0, cell 2C is the same cell as cell 1, C, 0 in time step 1. Try it out yourself but fill it in in a 5x5x3 grid. Let me know if this makes sense! I agree that it's confusing and he would have probably been better off showing the whole potential state space and not shifting to follow the active cells. :)
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This is confusing to look at too, but there's one important phrase that makes it correct:
This thread, makes it more clear. At time t=1, the possible grid is actually 5x5x3. The sample input is just shifted and shrunk to follow the boundary of actual cells.
In other words, for your diagram's time step 0, cell 2C is the same cell as cell 1, C, 0 in time step 1. Try it out yourself but fill it in in a 5x5x3 grid. Let me know if this makes sense! I agree that it's confusing and he would have probably been better off showing the whole potential state space and not shifting to follow the active cells. :)