Cutpath for LED table parts

table_cut.rb

require 'prawn'
require 'prawn/measurement_extensions'

@width          = 550.mm
@height         = 50.mm
@extra_height   = 35.mm

@cols_width     = 5.mm
@cols_height    = 26.mm

@set_width      = 35.mm
@set_trap_width = 3.mm

@offset         = @height + @extra_height

def reset(x, y)
  [@x = x, @y = y]
end

def go(w, h, flip = false)
  h = -h if flip
  [@x += w, @y += h]
end

def bar(pdf, boxes, offset = 0, flip = false)
  space_width = (@width - (boxes - 1) * @cols_width) / boxes.to_f
  points = []
  points << reset(0, offset)

  boxes.times do |i|
    if i > 0
      points << go(@cols_width, 0, flip)
    end
    points << go(@set_width, 0, flip)
    points << go(@set_trap_width, @set_trap_width, flip)
    points << go(space_width - 2 * (@set_width + @set_trap_width), 0, flip)
    points << go(@set_trap_width, -@set_trap_width, flip)
    points << go(@set_width, 0, flip)
  end

  points << go(0, @height, flip)

  boxes.times do |i|
    if i > 0
      points << go(0, -@cols_height, flip)
      points << go(-@cols_width, 0, flip)
      points << go(0, @cols_height, flip)
    end
    points << go(-space_width, 0, flip)
  end

  pdf.polygon *points
end


def bar1(pdf, boxes, offset = 0, flip = false)
  space_width = (@width - (boxes - 1) * @cols_width) / boxes.to_f
  points = []
  points << reset(0, offset)

  boxes.times do |i|
    if i > 0
      points << go(0, @cols_height, flip)
      points << go(@cols_width, 0, flip)
      points << go(0, -@cols_height, flip)
    end
    points << go(@set_width, 0, flip)
    points << go(@set_trap_width, @set_trap_width, flip)
    points << go(space_width - 2 * (@set_width + @set_trap_width), 0, flip)
    points << go(@set_trap_width, -@set_trap_width, flip)
    points << go(@set_width, 0, flip)
  end

  points << go(0, @height, flip)
  points << go(-@width, 0, flip)

  pdf.polygon *points
end



Prawn::Document.generate('table.pdf', :page_size => [24.in, 18.in]) do |pdf|

  pdf.stroke do
    bar1(pdf, 5, 0 * @height)
    bar1(pdf, 5, 2 * @height, true)
    bar1(pdf, 5, 2 * @height)
    bar(pdf, 4, 4 * @height, true)
    bar(pdf, 4, 4 * @height)
    bar(pdf, 4, 6 * @height, true)
    bar(pdf, 4, 6 * @height)
  end

=begin
  pdf.start_new_page
  pdf.stroke do
    height = @height + @extra_height
    width  = @width + @cols_width
    4.times do |i|
      pdf.rectangle [0, @offset + i * height], width, height
    end
  end
=end

end