lasercat + xbox controller

lasercat.js

var five = require('johnny-five')
var XboxController = require('xbox-controller')

var xbox = new XboxController()
var board = new five.Board()

board.on('ready', function () {
  console.log('board ready')
  var pan = new five.Servo(9)
  var tilt = new five.Servo(13)
  var laser = new five.Led(2)

  pan.step = function (degrees, time) {
    var target = (this.last ? this.last.target : this.startAt) + degrees
    if (target < 0) target = 0
    if (target > 180) target = 180
    console.log('target pan', target)
    return this.to(target, time)
  }

  tilt.step = function (degrees, time) {
    var target = (this.last ? this.last.target : this.startAt) + degrees
    if (target < 0) target = 0
    if (target > 180) target = 180
    console.log('target tilt', target)
    return this.to(target, time)
  }

  this.repl.inject({
    pan: pan,
    tilt: tilt,
    laser: laser
  })

  xbox.on('connected', function(){
    console.log('Xbox controller connected')
  })

  xbox.on('righttrigger', function (val) {
    if (val) {
      laser.on()
    } else {
      laser.off()
    }
  })

  var panAvailable = true

  pan.on('move:complete', function () {
    console.log('move:complete')
    panAvailable = true
  })

  var panInterval = null
  var panDirection = null
  var panSpeed = null

  function startPan (direction, speed) {
    if (!speed) {
      clearInterval(panInterval)
      panInterval = null
      return
    }

    panDirection = direction
    panSpeed = speed

    if (!panInterval) {
      panInterval = setInterval(doPan, 50)
    }
  }

  function doPan () {
    if (!panAvailable) return
    panAvailable = false
    if (panDirection == 'left') {
      console.log('pan left -5')
      pan.step(-45, panSpeed)
    } else {
      console.log('pan right 5')
      pan.step(45, panSpeed)
    }
  }

  var tiltAvailable = true

  tilt.on('move:complete', function () {
    console.log('move:complete')
    tiltAvailable = true
  })

  var tiltInterval = null
  var tiltDirection = null
  var tiltSpeed = null

  function startTilt (direction, speed) {
    if (!speed) {
      clearInterval(tiltInterval)
      tiltInterval = null
      return
    }

    tiltDirection = direction
    tiltSpeed = speed

    if (!tiltInterval) {
      tiltInterval = setInterval(doTilt, 50)
    }
  }

  function doTilt () {
    if (!tiltAvailable) return
    tiltAvailable = false
    if (tiltDirection == 'up') {
      console.log('tilt up -5')
      tilt.step(-45, tiltSpeed)
    } else {
      console.log('tilt down 5')
      tilt.step(45, tiltSpeed)
    }
  }

  xbox.on('left:move', function (pos) {
    console.log('left:move', pos)
    if (pos.x < 0) {
      startPan('left', 250)
    } else if (pos.x > 0) {
      startPan('right', 250)
    } else {
      startPan(null, 0)
    }
  })

  xbox.on('right:move', function (pos) {
    console.log('right:move', pos)
    if (pos.y < 0) {
      startTilt('up', 250)
    } else if (pos.y > 0) {
      startTilt('down', 250)
    } else {
      startTilt(null, 0)
    }
  })
})