Elementary cellular automaton/Infinite length: Difference between revisions
Elementary cellular automaton/Infinite length (view source)
Revision as of 18:25, 26 November 2017
, 6 years agoAdded Kotlin
(→{{header|Tcl}}: added zkl) |
(Added Kotlin) |
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Line 320:
Looks like a [[Sierpinski_triangle|Sierpinski triangle]]
=={{header|Kotlin}}==
{{trans|C++}}
<lang scala>// version 1.1.51
fun evolve(l: Int, rule: Int) {
println(" Rule #$rule:")
var cells = StringBuilder("*")
for (x in 0 until l) {
addNoCells(cells)
val width = 40 + (cells.length shr 1)
println(cells.padStart(width))
cells = step(cells, rule)
}
}
fun step(cells: StringBuilder, rule: Int): StringBuilder {
val newCells = StringBuilder()
for (i in 0 until cells.length - 2) {
var bin = 0
var b = 2
for (n in i until i + 3) {
bin += (if (cells[n] == '*') 1 else 0) shl b
b = b shr 1
}
val a = if ((rule and (1 shl bin)) != 0) '*' else '.'
newCells.append(a)
}
return newCells
}
fun addNoCells(s: StringBuilder) {
val l = if (s[0] == '*') '.' else '*'
val r = if (s[s.length - 1] == '*') '.' else '*'
repeat(2) {
s.insert(0, l)
s.append(r)
}
}
fun main(args: Array<String>) {
evolve(35, 90)
println()
}
</lang>
{{out}}
<pre>
Rule #90:
..*..
..*.*..
..*...*..
..*.*.*.*..
..*.......*..
..*.*.....*.*..
..*...*...*...*..
..*.*.*.*.*.*.*.*..
..*...............*..
..*.*.............*.*..
..*...*...........*...*..
..*.*.*.*.........*.*.*.*..
..*.......*.......*.......*..
..*.*.....*.*.....*.*.....*.*..
..*...*...*...*...*...*...*...*..
..*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*..
..*...............................*..
..*.*.............................*.*..
..*...*...........................*...*..
..*.*.*.*.........................*.*.*.*..
..*.......*.......................*.......*..
..*.*.....*.*.....................*.*.....*.*..
..*...*...*...*...................*...*...*...*..
..*.*.*.*.*.*.*.*.................*.*.*.*.*.*.*.*..
..*...............*...............*...............*..
..*.*.............*.*.............*.*.............*.*..
..*...*...........*...*...........*...*...........*...*..
..*.*.*.*.........*.*.*.*.........*.*.*.*.........*.*.*.*..
..*.......*.......*.......*.......*.......*.......*.......*..
..*.*.....*.*.....*.*.....*.*.....*.*.....*.*.....*.*.....*.*..
..*...*...*...*...*...*...*...*...*...*...*...*...*...*...*...*..
..*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*..
..*...............................................................*..
..*.*.............................................................*.*..
..*...*...........................................................*...*..
</pre>
=={{header|Perl}}==
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