@rickosborne/hexgrid/axial-from-offset.mjs

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

var __defProp = Object.defineProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
import { AXIAL, EVEN_Q, EVEN_R, ODD_Q, ODD_R } from "./hex-system.mjs";
const SIMPLE_ROW_COL_KEY = Object.freeze({
  [EVEN_Q]: "col",
  [EVEN_R]: "row",
  [ODD_Q]: "col",
  [ODD_R]: "row"
});
const COMPLEX_ROW_COL_KEY = Object.freeze({
  [EVEN_Q]: "row",
  [EVEN_R]: "col",
  [ODD_Q]: "row",
  [ODD_R]: "col"
});
const axialFromOffset = /* @__PURE__ */ __name((offset) => {
  const system = offset.system;
  const simpleRowColKey = SIMPLE_ROW_COL_KEY[system];
  const complexRowColKey = COMPLEX_ROW_COL_KEY[system];
  const simpleIn = offset[simpleRowColKey];
  const complexIn = offset[complexRowColKey];
  let bit = simpleIn & 1;
  if (system === ODD_Q || system === ODD_R) {
    bit = -bit;
  }
  let q;
  let r;
  const complexOut = complexIn - (simpleIn + bit) / 2;
  if (system === ODD_R || system === EVEN_R) {
    q = complexOut;
    r = simpleIn;
  } else {
    q = simpleIn;
    r = complexOut;
  }
  return {
    q,
    r,
    system: AXIAL
  };
}, "axialFromOffset");
export {
  axialFromOffset
};
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