2022-11-23 17:03:26 +00:00
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<!DOCTYPE html>
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<canvas id="canv"></canvas>
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<input type="file" id="file">
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<button id="step">Step</button>
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2023-12-01 15:48:21 +00:00
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<div id="out"></div>
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2022-11-23 17:03:26 +00:00
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<script>
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const write = line => {
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const out = document.querySelector("#out")
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out.appendChild(document.createTextNode(line))
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out.appendChild(document.createElement("br"))
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}
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const PX = 16
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const W = 16
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const RANGE = 10
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const ctx = document.querySelector("canvas").getContext("2d")
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ctx.canvas.width = PX * W
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ctx.canvas.height = PX * W
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let grid = Array(W * W).fill(null).map(x => ({ value: null, options: new Set(Array(RANGE).fill(null).map((_, ix) => ix)) }))
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const map = ([x, y]) => x + y * W
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const unmap = a => [a % W, Math.floor(a / W)]
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const vsum = ([a, b], [c, d]) => [a + c, b + d]
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const adj = [[0, 1], [0, -1], [1, 0], [-1, 0]]
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const inRange = p => p >= 0 && p < grid.length
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const modclamp = x => x < 0 ? 10 + x : x % 10
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const updatePos = (pos, value) => {
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grid[map(pos)].value = value
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console.log(value)
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grid[map(pos)].options = null
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for (const a of adj) {
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const n = map(vsum(a, pos))
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if (inRange(n) && grid[n].value === null) {
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for (const offset of [-1, 0, 1, 2, -2, 3, -3]) {
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grid[n].options.delete(modclamp(offset + value))
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}
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}
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}
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}
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const findBestCandidates = grid => grid.reduce(([bestQty, bestPos], val, index) => {
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if (val.value !== null) {
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return [bestQty, bestPos]
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}
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if (val.options.size < bestQty) {
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return [val.options.size, [unmap(index)]]
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}
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if (val.options.size == bestQty) {
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bestPos.push(unmap(index))
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}
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return [bestQty, bestPos]
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}, [RANGE, []])
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const render = grid => {
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for (let x = 0; x < W; x++) {
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for (let y = 0; y < W; y++) {
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const data = grid[map([x, y])]
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const level = data.options && Math.floor(data.options.size / RANGE * 255).toString(16).padStart(2, "0")
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ctx.fillStyle = data.value !== null ? `#0000${Math.floor(data.value / RANGE * 255).toString(16).padStart(2, "0")}` : `#${level}${level}${level}`
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ctx.fillRect(x * PX, y * PX, PX, PX)
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}
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}
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}
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const pick = arr => arr[Math.floor(Math.random() * arr.length)]
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render(grid)
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step.onclick = () => {
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const [qty, pos] = findBestCandidates(grid)
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if (qty === 0) {
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write("contradiction")
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return
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}
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write(`${qty} options on ${pos.length} tiles`)
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if (qty === 1) {
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write("resolving")
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for (const p of pos) {
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const newValue = Array.from(grid[map(p)].options)[0]
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console.log(newValue)
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updatePos(p, newValue)
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}
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} else {
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const p = pick(pos)
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console.log(p, map(p), grid[map(p)])
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const newValue = pick(Array.from(grid[map(p)].options))
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console.log(newValue)
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updatePos(p, newValue)
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}
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render(grid)
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}
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window.file.oninput = ev => {
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const file = e.target.files[0]
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const url = URL.createObjectURL(file)
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const img = new Image()
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img.onload = function() {
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URL.revokeObjectURL(img.src)
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c.getContext("2d").drawImage(img, 0, 0)
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}
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img.src = url
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}
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</script>
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