mirror of
https://github.com/antonmedv/fx
synced 2024-11-03 15:40:12 +00:00
80 lines
2.7 KiB
JavaScript
80 lines
2.7 KiB
JavaScript
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'use strict'
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// http://bit.ly/fx--life
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const
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run = f => setInterval(f, 16),
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p = (s) => process.stdout.write(s),
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esc = (...x) => x.map(i => p('\u001B[' + i)),
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[upper, lower, full] = ['\u2580', '\u2584', '\u2588'],
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{columns, rows} = process.stdout,
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[w, h] = [columns, rows * 2],
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a = Math.floor(w / 2) - 6, b = Math.floor(h / 2) - 7
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let $ = Array(w * h).fill(false)
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if (process.env.GUN) {
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$[1 + 5 * w] = $[1 + 6 * w] = $[2 + 5 * w] = $[2 + 6 * w] = $[12 + 5 * w] = $[12 + 6 * w] = $[12 + 7 * w] = $[13 + 4 * w] = $[13 + 8 * w] = $[14 + 3 * w] = $[14 + 9 * w] = $[15 + 4 * w] = $[15 + 8 * w] = $[16 + 5 * w] = $[16 + 6 * w] = $[16 + 7 * w] = $[17 + 5 * w] = $[17 + 6 * w] = $[17 + 7 * w] = $[22 + 3 * w] = $[22 + 4 * w] = $[22 + 5 * w] = $[23 + 2 * w] = $[23 + 3 * w] = $[23 + 5 * w] = $[23 + 6 * w] = $[24 + 2 * w] = $[24 + 3 * w] = $[24 + 5 * w] = $[24 + 6 * w] = $[25 + 2 * w] = $[25 + 3 * w] = $[25 + 4 * w] = $[25 + 5 * w] = $[25 + 6 * w] = $[26 + 1 * w] = $[26 + 2 * w] = $[26 + 6 * w] = $[26 + 7 * w] = $[35 + 3 * w] = $[35 + 4 * w] = $[36 + 3 * w] = $[36 + 4 * w] = true
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} else if (process.env.RANDOM) {
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for (let i = 0; i < $.length; i++)
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if (Math.random() < 0.16) $[i] = true
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} else {
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$[a + 1 + (2 + b) * w] = $[a + 2 + (1 + b) * w] = $[a + 2 + (3 + b) * w] = $[a + 3 + (2 + b) * w] = $[a + 5 + (15 + b) * w] = $[a + 6 + (13 + b) * w] = $[a + 6 + (15 + b) * w] = $[a + 7 + (12 + b) * w] = $[a + 7 + (13 + b) * w] = $[a + 7 + (15 + b) * w] = $[a + 9 + (11 + b) * w] = $[a + 9 + (12 + b) * w] = $[a + 9 + (13 + b) * w] = true
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}
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function at(i, j) {
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if (i < 0) i = h - 1
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if (i >= h) i = 0
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if (j < 0) j = w - 1
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if (j >= w) j = 0
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return $[i * w + j]
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}
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function neighbors(i, j) {
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let c = 0
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at(i - 1, j - 1) && c++
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at(i - 1, j) && c++
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at(i - 1, j + 1) && c++
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at(i, j - 1) && c++
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at(i, j + 1) && c++
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at(i + 1, j - 1) && c++
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at(i + 1, j) && c++
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at(i + 1, j + 1) && c++
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return c
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}
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run(() => {
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esc('H')
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let gen = Array(w * h).fill(false)
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for (let i = 0; i < h; i++) {
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for (let j = 0; j < w; j++) {
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const n = neighbors(i, j)
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const z = i * w + j
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if ($[z]) {
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if (n < 2) gen[z] = false
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if (n === 2 || n === 3) gen[z] = true
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if (n > 3) gen[z] = false
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} else {
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if (n === 3) gen[z] = true
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}
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}
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}
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$ = gen
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for (let i = 0; i < rows; i++) {
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for (let j = 0; j < columns; j++) {
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if ($[i * 2 * w + j] && $[(i * 2 + 1) * w + j]) p(full)
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else if ($[i * 2 * w + j] && !$[(i * 2 + 1) * w + j]) p(upper)
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else if (!$[i * 2 * w + j] && $[(i * 2 + 1) * w + j]) p(lower)
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else p(' ')
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}
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if (i !== rows - 1) p('\n')
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}
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})
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esc('2J', '?25l')
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process.on('SIGINT', () => {
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esc('?25h')
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process.exit(2)
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})
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