2d-dungeon/dist/utils/random.js

prodecural dungeon generator for games

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _randomSeed = require("random-seed");

var _randomSeed2 = _interopRequireDefault(_randomSeed);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Random = function () {
  function Random(seed) {
    _classCallCheck(this, Random);

    this.rng = _randomSeed2.default.create(seed);
  }

  _createClass(Random, [{
    key: "int",
    value: function int(min, max) {
      return this.rng.intBetween(min, max);
    }
  }, {
    key: "float",
    value: function float() {
      var min = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
      var max = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;

      return this.rng.floatBetween(min, max);
    }
  }, {
    key: "vec",
    value: function vec(min, max) {
      // min and max are vectors [int, int];
      // returns [min[0]<=x<=max[0], min[1]<=y<=max[1]]
      return [this.int(min[0], max[0]), this.int(min[1], max[1])];
    }
  }, {
    key: "choose",
    value: function choose(items) {
      var remove = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      var idx = this.rng.intBetween(0, items.length - 1);
      if (remove) {
        return items.splice(idx, 1)[0];
      } else {
        return items[idx];
      }
    }
  }, {
    key: "maybe",
    value: function maybe(probability) {
      return this.float() <= probability;
    }
  }]);

  return Random;
}();

exports.default = Random;