@rickosborne/hexgrid/qrs-ring.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 qrs_ring_exports = {};
__export(qrs_ring_exports, {
  qrsRing: () => qrsRing
});
module.exports = __toCommonJS(qrs_ring_exports);
const RING_DIRECTIONS = Object.freeze([
  { q: 1, r: 0 },
  { q: 1, r: -1 },
  { q: 0, r: -1 },
  { q: -1, r: 0 },
  { q: -1, r: 1 },
  { q: 0, r: 1 }
]);
const qrsRing = /* @__PURE__ */ __name((center, radius, builder) => {
  if (radius < 1) {
    return [];
  }
  const points = [];
  let q = -radius + center.q;
  let r = radius + center.q;
  for (let i = 0; i < 6; i++) {
    const neighborDirection = RING_DIRECTIONS[i];
    for (let j = 0; j < radius; j++) {
      points.push(builder(q, r));
      q += neighborDirection.q;
      r += neighborDirection.r;
    }
  }
  return points;
}, "qrsRing");
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