var SnapMX = (function(){

  function SnapMX (w, h) {
    w = w || 100
    h = h || 100
    var snap = this.snap = new Snap (w, h)
    var el = this.el = snap.node
    var mx = this.mx = new MX.Object3D (el)
    scene.add(mx)
  }
  SnapMX.prototype.resize = function(w, h){
    this.snap.attr({
      width: w,
      height: h|0,
    })
    this.mx.width = w
    this.mx.height = h
  }
  SnapMX.prototype.clear = function(){
    this.snap.clear()
  }
  SnapMX.prototype.show = function(){
    this.visible = true
    this.mx.style.display = "block"
  }
  SnapMX.prototype.hide = function(){
    this.visible = false
    this.mx.style.display = "hide"
  }

  return SnapMX

})()