if shape.mode == 'line' then

    if shape.mode == 'line' or shape.mode == 'manhattan' then

    elseif shape.mode == 'polygon' then
      for i,p in ipairs(shape.vertices) do
        shape.vertices[i] = insert_point(drawing.points, p.x,p.y)
      end
    elseif shape.mode == 'circle' or shape.mode == 'arc' then
      shape.center = insert_point(drawing.points, shape.center.x,shape.center.y)

      outfile:write(json.encode({mode='freehand', points={{x=40,y=47}}})..'\n')
      for k,v in pairs(shape) do
        print(k, v)
      end
      for k,v in pairs(shape.points) do
        print(k,v)
        if type(v) == 'table' then
          for k,v in pairs(v) do
            print('', k,v)
          end
        end
      end

    elseif shape.mode == 'line' then

    elseif shape.mode == 'line' or shape.mode == 'manhattan' then

      outfile:write(line..'\n')
    elseif shape.mode == 'polygon' then
      local obj = {mode=shape.mode, vertices={}}
      for _,p in ipairs(shape.vertices) do
        table.insert(obj.vertices, drawing.points[p])
      end
      local line = json.encode(obj)

      outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius})..'\n')
    elseif shape.mode == 'arc' then
      outfile:write(json.encode({mode=shape.mode, center=drawing.points[shape.center], radius=shape.radius, start_angle=shape.start_angle, end_angle=shape.end_angle})..'\n')