TimePilot.Controller.Gamepad.js

/* global define */
define("TimePilot.Controller.Gamepad", [
    "engine/helpers"
], function (
    helpers
) {

    var Gamepad = function (controllerInterface) {
        this._controllerInterface = controllerInterface;

        this.connect();
    };

    Gamepad.prototype = {
        /**
         * Is the fire button pressed on the Gamepad.
         * @type {Boolean}
         */
        _isFireButtonPressed: false,
        /**
         * Is the pause button pressed on the Gamepad.
         * @type {Boolean}
         */
        _isPauseButtonPressed: false,
        /**
         * Is the restart button pressed on the Gamepad.
         * @type {Boolean}
         */
        _isRestartButtonPressed: false,

        /**
         * Looping to check for gamepad data.
         * @method _gameLoop
         */
        _gameLoop: function () {
            var gamepads = navigator.getGamepads ? navigator.getGamepads() : (
                    navigator.webkitGetGamepads ? navigator.webkitGetGamepads : []
                );
            for (var playerIndex = 0; playerIndex < gamepads.length; playerIndex++) {
                var gamepad = gamepads[playerIndex];
                if (gamepad) {
                    if (gamepad.buttons[0].pressed && !this._isFireButtonPressed) {
                        this._isFireButtonPressed = true;
                        this._controllerInterface.startShooting();
                    } else if (!gamepad.buttons[0].pressed && this._isFireButtonPressed) {
                        this._isFireButtonPressed = false;
                        this._controllerInterface.stopShooting();
                    }

                    if (gamepad.buttons[9].pressed && !this._isPauseButtonPressed) {
                        this._isPauseButtonPressed = true;
                        this._controllerInterface.togglePause();
                    } else if (!gamepad.buttons[9].pressed) {
                        this._isPauseButtonPressed = false;
                    }

                    if (gamepad.buttons[8].pressed && !this._isRestartButtonPressed) {
                        this._isRestartButtonPressed = true;
                        this._controllerInterface.restart();
                    } else if (!gamepad.buttons[8].pressed) {
                        this._isRestartButtonPressed = false;
                    }

                    if (gamepad.axes[0] || gamepad.axes[1]) {
                        var heading = helpers.findHeading({
                            posX: -(gamepad.axes[0]),
                            posY: -(gamepad.axes[1])
                        });
                        this._controllerInterface.rotateToHeading(heading);
                    }
                }
            }
            window.requestAnimationFrame(this._gameLoop.bind(this));
        },

        /**
         * Connecting the Gamepad controller interface
         * @method connect
         */
        connect: function () {
            this._gameLoop();
        },

        /**
         * Disconnecting the Gamepad controller interface.
         * @method disconnect
         */
        disconnect: function () {
        }
    };

    return Gamepad;
});