sam-ecs/dist/Family.js

A specialized entity component system

'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

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; }; }();

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

//Family.js//

/**
 * @description - More robust than a set for choosing entities to 
 * be included in a processor
 * @author - Sam Faulkner
 */

var FastSet = require('collections/fast-set.js');

var Family = function () {
  function Family(mustHave, cannotHave) {
    _classCallCheck(this, Family);

    if ((typeof mustHave === 'undefined' ? 'undefined' : _typeof(mustHave)) == 'object') {
      mustHave = new FastSet(mustHave);
    }
    if ((typeof cannotHave === 'undefined' ? 'undefined' : _typeof(cannotHave)) == 'object') {
      cannotHave = new FastSet(cannotHave);
    }
    this._mustHaves = mustHave || new FastSet();
    this._cannotHave = cannotHave || new FastSet();
  }

  _createClass(Family, [{
    key: 'getHaves',
    value: function getHaves() {
      return this._mustHaves;
    }
  }, {
    key: 'getCannotHaves',
    value: function getCannotHaves() {
      return this._cannotHave;
    }
  }, {
    key: 'has',
    value: function has(singleComponent) {
      return this._mustHaves.has(singleComponent) && !this._cannotHave.has(singleComponent);
    }

    /**
     * @description - Returns a boolean if this entity belongs in this 
     * family
     * @param {Entity} entity - the entity to test
     */

  }, {
    key: 'testEntity',
    value: function testEntity(entity) {
      return this.testComponentSet(entity.getComponents().keysArray());
    }

    /**
     * @description - Returns true if the set of components could belong
     * in this set or not
     * @param {Set} set - the set of components to test
     */

  }, {
    key: 'testComponentSet',
    value: function testComponentSet(set) {
      return this._mustHaves.intersection(set).length == this._mustHaves.length && this._cannotHave.intersection(set).length == 0;
    }
  }]);

  return Family;
}();

module.exports = Family;