sphero "slow-motion hot potato" game hacked on at nodebots sf spherofest 11/20/2013 with @tc

sphero-gyro.js

var spheron = require('spheron');
var sphero = spheron.sphero();
var spheroPort = '/dev/cu.Sphero-BYR-RN-SPP';

sphero.on('open', function() {
	console.log("opened");

	var maskX = 0x1000,
		maskY = 0x0800,
		maskZ = 0x0400,
		mask = maskX | maskY | maskZ;
	sphero.setStabalisation(0);
	sphero.setDataStreaming(40, 1, mask, 0);
});

console.log("opening...");
sphero.open(spheroPort);

sphero.on("packet", function(packet) {
	if (packet.ID_CODE === 0x03) {
		var data = readGyro(packet.DATA);
		sphero.emit("gyro", data);
	}
});

sphero.on("gyro", function(data) {
	sphero.emit("move", getMoveVal(data));
});

var updater = createUpdater();

sphero.on("move", function(move) {
	updater(move);
});

function createUpdater() {
	var dead = false;
	return function(val) {
		if (dead) {
			sphero.setRGB(0xff0000, 0);
			return;
		}

		if (val < 1000) {
			sphero.setRGB(0x0000ff, 0);
		}
		else if (val < 5000) {
			sphero.setRGB(0x00ff00, 0);
		}
		else {
			dead = true;
			resetState();
		}
	};

	function resetState() {
		setTimeout(function() {
			dead = false;
		}, 6000);
	}
}

function getMoveVal(data) {
	return Math.abs(data.x) + Math.abs(data.y) + Math.abs(data.z);
}

function readGyro(data) {
	return {
		x: data.readInt16BE(0),
		y: data.readInt16BE(2),
		z: data.readInt16BE(4),
	};
}