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Add hash function #3

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DenisCarriere opened this issue Dec 23, 2016 · 0 comments
Closed

Add hash function #3

DenisCarriere opened this issue Dec 23, 2016 · 0 comments

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@DenisCarriere
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DenisCarriere commented Dec 23, 2016

/**
 * Hash for Map ID
 *
 * @param {Tile} tile [x, y, z]
 * @returns {number} hash
 * @example
 * hash([312, 480, 4])
 * //=5728
 */
export function hash(tile: Tile): number {
  const [x, y, z] = tile
  return (1 << z) * ((1 << z) + x) + y
}
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