limit-scale.rb

limit-scale.rb

# Limit the scale handles for Groups and Instances

UI.add_context_menu_handler do |menu|
  model = Sketchup.active_model
  selection = model.selection
  if selection.nitems == 1 and selection[0].is_a? Sketchup::Group or selection[0].is_a?(Sketchup::ComponentInstance)
    menu.add_item("Limit Scale") do 
      JF::LimitScale.do(selection[0])
    end
  end
end

module JF
  module LimitScale
    X   = 1
    Y   = 2
    Z   = 4
    XZ  = 8
    YZ  = 16
    XY  = 32
    XYZ = 64
    def self.do(e)
      if e.is_a?(Sketchup::Group)
        b = e.entities[0].parent.behavior
      end
      if e.is_a?(Sketchup::ComponentInstance)
        b = e.definition.behavior
      end
      m = b.no_scale_mask?
      m = m.to_s(2).split(//)
      while m.length < 7
        m.unshift(0)
      end
      m.reverse!
      prompts = %w( X Y Z XZ YZ XY XYZ )
      r = UI.inputbox(prompts, m, "Scale Mask 1=Disable")
      return if r == false
      s = r.join
      s = "0b" + s.reverse
      s = Integer(s)
      b.no_scale_mask = s
    end
  end
end