main.coffee

_DEBUG_ = false
d = (m, debug = _DEBUG_ ) -> console.log(m) if _DEBUG_

randomInt = (min,max) ->
  min = Math.floor(min)
  max = Math.floor(max)
  return Math.floor(Math.random() * (max - min + 1)) + min

plusMinus = (v, target_value, range) ->
  #debugger;
  if v >= target_value - range and v < target_value + range
    #d(v)
    #d(target_value - range)
    #d(target_value + range)
    return true
  else
    return false

window.two = new Two(
  fullscreen: true
  ).appendTo(document.body)

window.two_canvas = new Two(
  fullscreen: true
  type: Two.Types.canvas
  )

gravity = Math.floor(two.height/10)

world = new p2.World(
  gravity:[0, gravity]
)

_game_won_ = -1
_level_ = 0

end_dot = {}
dot = {}
user_dots = []
start_dots = []

setLevelCounter = (l=0, color = Please.make_color()) ->
  level_element = document.getElementById('level')
  if not level_element and l is 0
    return false
  if not level_element
    level_element = document.createElement('h2')
    level_element.id = 'level'
    document.body.appendChild(level_element)
  level_element.setAttribute('style','color:'+color+';')
  if l isnt 0
    level_element.innerHTML = ""+l
  else
    level_element.innerHTML = ''+l

setWorldColor = (color = Please.make_color()) ->
  window.document.body.style.background = color

createDot = (world, two, x = 70, y = 200, r = 10, m = 1)  ->
  x = Math.floor(x)
  y = Math.floor(y)
  r = Math.floor(r)
  circle = two.makeCircle(x, y, r)
  circle.fill = Please.make_color()
  circle.stroke = 'black'
  circle.linewidth = 2;

  circleShape = new p2.Circle({ radius: r })
  circleShape.material = new p2.Material()
  circleBody = new p2.Body(
    mass:m,
    position:[x,y]
    damping: 0
    angularDamping: 0
    )
  circleBody.ID=false

  circleBody.addShape(circleShape)
  world.addBody(circleBody)
  return {
    two: circle
    p2:
      shape: circleShape
      body: circleBody
  }

createFixedDot = (world, two, dot, w,h,r,m=0) ->
  new_dot = createDot(world, two, w,h,r,m)
  world.addContactMaterial(new p2.ContactMaterial(dot.p2.shape.material, new_dot.p2.shape.material, {
                restitution : 0.9,
                stiffness : Number.MAX_VALUE
            }))
  return new_dot

createUserDot = (world = world, two = two, dot = dot, user_dots = user_dots, w,h,r,m) ->
  #r = r - user_dots.length

  #_level_
  opacity_factor = 1 - (_level_/100)
  if _level_ < 20 then opacity_factor = 0.8
  if opacity_factor < 0 then opacity_factor = 0

  for doties,j in user_dots
    if (_level_ < 20 and user_dots.length - j > 3) or _level_ >= 20
      doties.two.opacity = doties.two.opacity*opacity_factor
      if doties.two.opacity < 0.20
        doties.two.opacity = 0
        two.remove(doties) #doesnt seem to work
        removeDot(doties)
        #todo clean user_dots

  ud = createFixedDot(world, two, dot, w,h,r,m)

  user_dots.push(ud)
  return ud

drawDot = (dot, world = world, two = two) ->
 dot.two.translation.set( Math.floor(dot.p2.body.position[0]),Math.floor(dot.p2.body.position[1]))
 return dot

createEndDot = (world = world, two = two, x ,y=randomInt(0,two.height),r=20,m=0) ->

  if not x
    if Math.random() < 0.5
      x = randomInt(0,Math.floor(two.width/2)-28)
    else
      x = randomInt(Math.floor(two.width/2)+28,two.width)
  end_dot = createDot(world, two, x,y,r,m)
  end_dot.p2.shape.sensor = true
  end_dot.p2.body.damping = 0
  end_dot.p2.body.ID = "ENDDOT"
  end_dot.two.fill = 'black'

  return end_dot



do init = () ->
  setWorldColor()



  end_dot = createEndDot(world, two)
  #for x in [0...200]
  #  createEndDot(world, two)

  dot = createDot(world, two, two.width/2,-30,10,1)
  hard_dots = _level_ #- 2
  if hard_dots > 0
    for x in [0...hard_dots]
      hd_x = randomInt(0,two.width)
      hd_y = randomInt(50,two.height)
      if not (hd_x > end_dot.p2.body.position[0] - 35 and hd_x < end_dot.p2.body.position[0] + 35 and hd_y > end_dot.p2.body.position[1] - 35 and hd_y < end_dot.p2.body.position[1] + 35)
        hd = createFixedDot(world, two, dot, hd_x, hd_y,30)
        start_dots.push(hd)
  #debugger;



  if(two.height > gravity*10)
    dot.p2.body.velocity = [0,Math.floor(two.height/7)]
  else
    dot.p2.body.velocity = [0,Math.floor(two.height/9)]
  dot.p2.body.ID = "DOT"
  window.scrollTo(0, 1)
  two.play()

removeDot = (dot) ->
  #two.remove(dot.two)
  world.removeBody(dot.p2.body)



restart = (won = false) ->
  two.pause()
  two.clear()
  removeDot(end_dot)
  removeDot(dot)
  for doties in user_dots
    removeDot(doties)
  user_dots = []
  for doties in start_dots
    removeDot(doties)
  start_dots = []
  if won is true
    _level_ = _level_ + 1
  else
    _level_ = _level_ - 1
    if _level_ < 0 then _level_ = 0
  setLevelCounter(_level_)
  init()

isDotOutOfBounds = (dot, world = world, two = two) ->
  if dot.p2.body.position[1]>two.height+50 or dot.p2.body.position[0]<-50 or dot.p2.body.position[0]>two.width+50

    return true
  else
    return false



two.bind('update', (frameCount) ->
  drawDot(dot)

  world.step(1/60)
  if _game_won_ > -1
    if _game_won_ is 0
      restart(true)
      _game_won_ = -1
    else
      _game_won_ = _game_won_ - 1

  if _game_won_ is -1 and isDotOutOfBounds(dot, world, two) is true

    restart(false)

)

world.on("beginContact",(e) ->
  if (e.bodyB.ID is 'ENDDOT' or e.bodyB.ID is 'DOT' ) and (e.bodyA.ID is 'ENDDOT' or e.bodyA.ID is 'DOT' )
    end_dot.two.fill = 'white'
    end_dot.two.stroke = 'white'
    _game_won_ = 15
)


#tap stuff
##mc = new Hammer.Manager(document.body)
#Tap = new Hammer.Tap({interval:1})
#mc.add(Tap)
#mc.on('tap',(e)->

#  user_dots.push(createFixedDot(world, two, dot, e.pointers[0].pageX,e.pointers[0].pageY,30))
#  )

addDotByEvent = (e) ->
  e.preventDefault()
  e.stopPropagation()
  #console.log(e)
  x = e?.touches?[0]?.pageX ? e?.pageX
  y = e?.touches?[0]?.pageY ? e?.pageY

  #check if the tab is on the end_dot to trigger special stuff
  if plusMinus(x, end_dot.p2.body.position[0],15) and plusMinus(y, end_dot.p2.body.position[1],15)
    #alert('gottach')
    return false

  if(x? and y?)
    createUserDot(world, two, dot, user_dots, x,y,30)
    return true
  else
    return false

document.body.addEventListener('mousedown', (e) -> addDotByEvent(e))
document.body.addEventListener('touchstart', (e) -> addDotByEvent(e))
document.body.addEventListener('click', (e)->e.preventDefault())
#document.body.addEventListener('click', (e)->e.preventDefault())