@rickosborne/hexgrid/offset-neighbor.cjs

Rick Osborne's collection of hexagonal grid-related code.

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var offset_neighbor_exports = {};
__export(offset_neighbor_exports, {
  offsetNeighbor: () => offsetNeighbor
});
module.exports = __toCommonJS(offset_neighbor_exports);
var import_hex_system = require("./hex-system.cjs");
const DIRECTION_DIFFERENCES = Object.freeze({
  [import_hex_system.EVEN_Q]: [
    [[1, 1], [1, 0], [0, -1], [-1, 0], [-1, 1], [0, 1]],
    [[1, 0], [1, -1], [0, -1], [-1, -1], [-1, 0], [0, 1]]
  ],
  [import_hex_system.EVEN_R]: [
    [[1, 0], [1, -1], [0, -1], [-1, 0], [0, 1], [1, 1]],
    [[1, 0], [0, -1], [-1, -1], [-1, 0], [-1, 1], [0, 1]]
  ],
  [import_hex_system.ODD_Q]: [
    [[1, 0], [1, -1], [0, -1], [-1, -1], [-1, 0], [0, 1]],
    [[1, 1], [1, 0], [0, -1], [-1, 0], [-1, 1], [0, 1]]
  ],
  [import_hex_system.ODD_R]: [
    [[1, 0], [0, -1], [-1, 1], [-1, 0], [-1, 1], [0, 1]],
    [[1, 0], [1, -1], [0, -1], [-1, 0], [0, 1], [1, 1]]
  ]
});
const offsetNeighbor = /* @__PURE__ */ __name((offset, direction) => {
  const simpleKey = offset.system === import_hex_system.ODD_Q || offset.system === import_hex_system.EVEN_Q ? "col" : "row";
  const bit = offset[simpleKey] & 1;
  const [colStep, rowStep] = DIRECTION_DIFFERENCES[offset.system][bit][direction];
  return {
    col: offset.col + colStep,
    row: offset.row + rowStep,
    system: offset.system
  };
}, "offsetNeighbor");
//# sourceMappingURL=offset-neighbor.cjs.map