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    REPORT.md clock.js event_emitter.js model.js score_keeper.js tetrimino.js tetrimino_factory.js tetris.js tetris_control.js tetris_view.js util.js

  • tetrimino_factory.js

  • ¶ 
    Tetris.js - A Tetris clone for HTML5
Copyright (C) 2014  Chris Barrick <cbarrick1@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

    
define(function (require, exports, module) {
	'use strict';

	var Model = require('model');
	var Tetrimino = require('tetrimino');
  • ¶

    A factory of pseudo-randomly generated Tetriminos.

    See the Tetris Wiki for the algorithm.

    Attributes

  • ¶
    • queue (Array): The current output queue of Tetriminos
    • pool (Array): A pool of Tetriminos to refill the queue
    • bounds (Array -> Boolean): The bounds function for all Tetriminos created by this factory. See src/tetrimino.js for details
    	module.exports = Model.extend({

		attributes: {
			queue: [],
			pool: [],
			bounds: function () { return true; }
		},


		initialize: function () {
			this.set({
				queue: this._makeQueue(),
				pool: this._makeQueue()
			});
		},
  • ¶

    queue.pop()

  • ¶

    Returns a tetrimino from the queue.

    		pop: function () {
			var queue = this.get('queue');
			var pool = this.get('pool');
			var ret = queue.pop();
			var replacement = pool.pop();

			queue.unshift(replacement);
			if (pool.length === 0) {
				pool = this._makeQueue();
				this.set('pool', pool);
			}
			return ret;
		},
  • ¶

    Helper methods

  • ¶
  • ¶

    Creates a permutation of the 7 Tetrimino types

    		_makeQueue: function () {
			var bounds = this.get('bounds');
			var chooseFrom = [];
			var bag = [];
			var tetrimino;
			var randomIndex;
			for (var TypeName in Tetrimino.types) {
				tetrimino = new Tetrimino({type: TypeName, bounds: bounds});
				chooseFrom.push(tetrimino);
			}
			while (chooseFrom.length > 0) {
				randomIndex = Math.floor(Math.random() * chooseFrom.length);
				bag.push(chooseFrom.splice(randomIndex, 1)[0]);
			}
			return bag;
		}

	});
});