c=        require("component")
computer= require("computer")
event=    require("event")
os=       require("os")
term =    require("term")
gpu=      c.gpu
h=        c.hologram
printer=  c.printer3d;printer.reset()
screenWidth,screenHeight=gpu.getResolution()
screenToggled=false
curx,cury,curz=1,1,1
curstate=0
figStartX,figStartY,figStartZ=0,0,0
texture="command_block"

h.clear()
function intro()
  print("move cursor by arrow keys, w s layer up/down")
  print("space- start drawing model. second time for end.")
  print("t to enter name of texture.")
  print("q exit. c clear screen. p print")
end

function swap(incrx,incry,incrz)
  h.set(curx,cury,curz,curstate)
  curx,cury,curz=curx+incrx,cury+incry,curz+incrz
  --printvars()
  if figStartX~=0 then
    local fillStartX,fillStartY,fillStartZ=figStartX,figStartY,figStartZ
    local fillEndX,fillEndY,fillEndZ=curx,cury,curz
--print("fillSX="..fillStartX.." fsY"..fillStartY.."fsZ"..fillStartZ)
--print("fillEX="..fillEndX.." feY"..fillEndY.."feZ"..fillEndZ)

    if figStartX>curx then fillStartX=curx;fillEndX=figStartX end
    if figStartY>cury then fillStartY=cury;fillEndY=figStartY end
    if figStartZ>curz then fillStartZ=curz;fillEndZ=figStartZ end

    for i=fillStartX,fillEndX do
      for j=fillStartZ,fillEndZ do
        for k=fillStartY,fillEndY do
          h.set(i,k,j,2)
        end
      end
    end
  end
  curstate=h.get(curx,cury,curz)
  h.set(curx,cury,curz,1)
end

function moveForward()
  if curx<16 then
   swap(1,0,0)
  else computer.beep(1500,0.1) end
end
function moveBack()
  if curx>1 then
    swap(-1,0,0)
  else computer.beep(1500,0.1) end
end
function moveLeft()
  if curz>1 then
    swap(0,0,-1)
  else computer.beep(1500,0.1) end
end
function moveRight()
  if curz<16 then
    swap(0,0,1)
  else computer.beep(1500,0.1) end
end
function layerUp()
  if cury<16 then
    swap(0,1,0)
  else computer.beep(1500,0.1) end
end
function layerDown()
  if cury>1 then
    swap(0,-1,0)
  else computer.beep(1500,0.1) end
end
function mark()
  if figStartX==0 then
   figStartX,figStartY,figStartZ=curx,cury,curz
   swap(0,0,0)
   os.sleep(1)
  else
    local fillStartX,fillStartY,fillStartZ=figStartX,figStartY,figStartZ
    local fillEndX,fillEndY,fillEndZ=curx,cury,curz
    if figStartX>curx then fillStartX=curx;fillEndX=figStartX end
    if figStartY>cury then fillStartY=cury;fillEndY=figStartY end
    if figStartZ>curz then fillStartZ=curz;fillEndZ=figStartZ end
    local result, reason = printer.addShape(fillStartX-1, fillStartY-1, fillStartZ-1, fillEndX, fillEndY, fillEndZ, texture)
    if not result then
      print("Failed adding shape: " .. tostring(reason))
    end
   figStartX,figStartY,figStartZ=0,0,0
   curx,cury,curz=1,1,1
--   swap(0,0,0)
   os.sleep(1)
  end
  
end

function printme()
  printer.setLabel("KelLiN block")
  printer.setTooltip("Printed with KelLiN software")
  local result, reason = printer.commit(1)
  if result then
    print("Job successfully committed!")
  else
    print("Failed committing job: " .. tostring(reason))
    gpu.setResolution(screenWidth,screenHeight)
    h.clear()
    os.exit()
  end
end

function toggleScreen()
  if screenToggled then
   gpu.setResolution(screenWidth,screenHeight)
   screenToggled=false
   intro()
  else
   gpu.setResolution(1,1)
   screenToggled=true
  end

end
function printvars()
print("---------------------")
  print("curx="..curx..";  cury="..cury.."curz="..curz)
  print("figStartX"..figStartX.."  figStartY"..figStartY.."   figStartZ"..figStartZ)
  
  
end
--test keys
--os.sleep(1);print(event.pull("key_down"))
intro()
swap(0,0,0)
while true do
  _,_,key1,key2=event.pull("key_down")
  if key2==19 then      term.clear();toggleScreen();--r
  elseif key2==20 then      print("input texture name")texture=io.read();--t
  elseif key2==46 then  term.clear();intro();--c
  elseif key2==16 then  term.clear();h.clear();os.exit();--q
  elseif key2==200 then moveForward();--up arrow
  elseif key2==208 then moveBack();--down arrow
  elseif key2==203 then moveLeft();--left arrow
  elseif key2==205 then moveRight();--right arrow
  elseif key2==17 then layerUp();--w
  elseif key2==31 then layerDown();--s
  elseif key2==57 then mark();--space
  elseif key2==25 then printme();intro();--p
  end
end