My friend Alex Bond rewrote babay's tpt ruler script for me to make it more functionallu and less buggy. F4 turns ruler on or off. There are bug with Ctrl+Shift(Alt), But with only Ctrl or Shift it works greatly.
You can delete all tpt.log strings if you need.


ruler = {}
 
ruler.active = false
ruler.mouse_down = false
ruler.rx = 0
ruler.ry = 0
 
local function draw()
  local mx, my =  tpt.mousex, tpt.mousey
  local x, y = sim.adjustCoords(ruler.rx,ruler.ry)
  local x1, y1 = sim.adjustCoords(mx, my)
  local str = tostring(1+math.floor(((x - x1) ^ 2 + (y - y1) ^ 2) ^ 0.5 * 100) / 100) .. "\nX=" ..
    tostring(1+math.floor(((x - x1) ^ 2) ^ 0.5 * 100) / 100) .. "\nY=" ..
    tostring(1+math.floor(((y - y1) ^ 2) ^ 0.5 * 100) / 100)
  gfx.fillRect(mx + 1,my + 1,gfx.textSize(str)+8,40,200,0,0,127) -- color 200 0 0
  gfx.drawText(mx + 5, my + 5, str, 200, 200, 200)
end
 
function ruler.draw()
 if ruler.active and ruler.mouse_down then
  pcall(draw)
 end
end
 
function ruler.key(_, key, _,event)
-- F4 - 285
   if key == 285 and event == 1 then
        if ruler.active  == true then
            ruler.active  = false
   tpt.log("ruler off")
        else
            ruler.active = true
   tpt.log("ruler on")
        end
    end
end
 
function ruler.mouse(mx, my, _, event)
 if ruler.active then
  ruler.mouse_down = false
  if event == 1 then
   ruler.rx = mx
   ruler.ry = my
  end
  if event == 3 then
    ruler.mouse_down = true
  end
 end
end
 
tpt.register_mouseclick(ruler.mouse)
tpt.register_keypress(ruler.key)
tpt.register_step(ruler.draw)
 
tpt.log("ruler loaded")


Edit-jacob1: this formatting was very broken, fixed it