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42 lines
1.3 KiB
42 lines
1.3 KiB
const SIZE = 100 |
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const FREE = 0 |
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const FILLED = 1 |
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const MAP = new Int8Array(SIZE * SIZE) |
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const isFree = ({ x, y }) => MAP[y * SIZE + x] === FREE |
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const setFilled = ({ x, y }) => MAP[y * SIZE + x] = FILLED |
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const inBounds = n => n < SIZE && n >= 0 |
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const isInBounds = ({ x, y }) => inBounds(x) && inBounds(y) |
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const isNotBackward = el => el.direction !== 2 |
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const isForward = el => el.direction === 0 |
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const isRight = el => el.direction === 1 |
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const isLeft = el => el.direction === 3 |
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const goForward = arr => arr.find(isForward) |
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const goRight = arr => arr.find(isRight) |
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const goLeft = arr => arr.find(isLeft) |
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const isAlive = ai => !ai.dead |
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const isOtherAI = ai => !ai.me |
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// `snailIt` goes with the form of a snail |
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const snailIt = arr => goRight(arr) || goForward(arr) || goLeft(arr) |
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const update = ({ ai, ais }) => { |
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ais.forEach(setFilled) |
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const enemyCoordsIndices = ais |
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.filter(isOtherAI) |
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.filter(isAlive) |
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.flatMap(ai => ai.coords) |
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.map(coord => coord.index) |
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const possibleCoords = ai.coords |
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.filter(isInBounds) |
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.filter(isFree) |
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const safeCoords = possibleCoords.filter(c => !enemyCoordsIndices.includes(c.index)) |
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const coordsInBound = ai.coords |
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.filter(isInBounds) |
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.filter(isNotBackward) |
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return snailIt(safeCoords) || snailIt(possibleCoords) |
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}
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