//
// Roland GX-24 vinyl cutter
//
// Neil Gershenfeld 
// (c) Massachusetts Institute of Technology 2016
// 
// This work may be reproduced, modified, distributed, performed, and 
// displayed for any purpose, but must acknowledge the mods
// project. Copyright is retained and must be preserved. The work is 
// provided as is; no warranty is provided, and users accept all 
// liability.
//
// closure
//
(function(){
//
// module globals
//
var mod = {}
//
// name
//
var name = 'Roland GX-24 vinyl cutter'
//
// initialization
//
var init = function() {
   mod.force.value = 50
   mod.speed.value = 2
   }
//
// inputs
//
var inputs = {
   path:{type:'',
      event:function(evt){
         mod.name = evt.detail.name
         mod.path = evt.detail.path
         mod.dpi = evt.detail.dpi
         mod.width = evt.detail.width
         mod.height = evt.detail.height
         make_path()
         }}}
//
// outputs
//
var outputs = {
   file:{type:'',
      event:function(str){
         obj = {}
         obj.type = 'file'
         obj.name = mod.name+'.camm'
         obj.contents = str
         mods.output(mod,'file',obj)
         }}}
//
// interface
//
var interface = function(div){
   mod.div = div
   div.appendChild(document.createTextNode('force (g): '))
   var input = document.createElement('input')
      input.type = 'text'
      input.size = 6
      div.appendChild(input)
      mod.force = input
   div.appendChild(document.createElement('br'))
   div.appendChild(document.createTextNode('speed (cm/s): '))
   var input = document.createElement('input')
      input.type = 'text'
      input.size = 6
      div.appendChild(input)
      mod.speed = input
   div.appendChild(document.createElement('br'))
   div.appendChild(document.createTextNode('origin:'))
   div.appendChild(document.createElement('br'))
   var input = document.createElement('input')
      input.type = 'radio'
      input.name = mod.div.id+'origin'
      input.id = mod.div.id+'topleft'
      div.appendChild(input)
      mod.topleft = input
   div.appendChild(document.createTextNode(' left \u00A0\u00A0 top \u00A0\u00A0 right '))
   var input = document.createElement('input')
      input.type = 'radio'
      input.name = mod.div.id+'origin'
      input.id = mod.div.id+'topright'
      div.appendChild(input)
      mod.topright = input
   div.appendChild(document.createElement('br'))
   var input = document.createElement('input')
      input.type = 'radio'
      input.name = mod.div.id+'origin'
      input.id = mod.div.id+'botleft'
      input.checked = true
      div.appendChild(input)
      mod.botleft = input
   div.appendChild(document.createTextNode(' left bottom right '))
   var input = document.createElement('input')
      input.type = 'radio'
      input.name = mod.div.id+'origin'
      input.id = mod.div.id+'botright'
      div.appendChild(input)
      mod.botright = input
   }
//
// local functions
//
function make_path() {
   var dx = 25.4*mod.width/mod.dpi
   var dy = 25.4*mod.height/mod.dpi
   var nx = mod.width
   var ny = mod.height
   var force = parseFloat(mod.force.value)
   var speed = parseFloat(mod.speed.value)
   var str = "PA;PA;!ST1;!FS"+force+";VS"+speed+";\n"
   var scale = 40.0*dx/(nx-1.0) // 40/mm
   var ox = 0
   var oy = 0
   if (mod.botleft.checked) {
      var xoffset = 40.0*ox
      var yoffset = 40.0*oy
      }
   else if (mod.botright.checked) {
      var xoffset = 40.0*(ox-dx)
      var yoffset = 40.0*oy
      }
   else if (mod.topleft.checked) {
      var xoffset = 40.0*ox
      var yoffset = 40.0*(oy-dy)
      }
   else if (mod.topright.checked) {
      var xoffset = 40.0*(ox-dx)
      var yoffset = 40.0*(oy-dy)
      }
   //
   // loop over segments
   //
   for (var seg = 0; seg < mod.path.length; ++seg) {
      x = xoffset+scale*mod.path[seg][0][0]
      y = yoffset+scale*mod.path[seg][0][1]
      str += "PU"+x.toFixed(0)+","+y.toFixed(0)+";\n" // move up to start point
      //str += "PU"+x.toFixed(0)+","+y.toFixed(0)+";\n" // hack: repeat in case comm dropped
      str += "PD"+x.toFixed(0)+","+y.toFixed(0)+";\n" // move down
      //str += "PD"+x.toFixed(0)+","+y.toFixed(0)+";\n" // hack: repeat in case comm dropped
      //
      // loop over points
      //
      for (var pt = 1; pt < mod.path[seg].length; ++pt) {
         x = xoffset+scale*mod.path[seg][pt][0]
         y = yoffset+scale*mod.path[seg][pt][1]
         str += "PD"+x.toFixed(0)+","+y.toFixed(0)+";\n" // move down
         //str += "PD"+x.toFixed(0)+","+y.toFixed(0)+";\n" // hack: repeat in case comm dropped
         }
      str += "PU"+x.toFixed(0)+","+y.toFixed(0)+";\n" // move up at last point
      //str += "PU"+x.toFixed(0)+","+y.toFixed(0)+";\n" // hack: repeat in case comm dropped
      }
   str += "PU0,0;\n" // pen up to origin
   //str += "PU0,0;\n" // hack: repeat in case comm dropped
   outputs.file.event(str)
   }

//
// return values
//
return ({
   name:name,
   init:init,
   inputs:inputs,
   outputs:outputs,
   interface:interface
   })
}())