How to erase polygons from each other

Comments

• david234589

  August 2013 edited November -1

  Not sure if this is what you want but there is an erase method in Shapes. http://klayout.de/doc/code/class_Shapes.html

  So you could do

  module EraseSelectedShape
  
    app = RBA::Application.instance
    mw = app.main_window
  
    lv = mw.current_view
    if lv == nil
      raise "No view selected"
    end
  
    lv.transaction("Erase selected shape")
    begin
  
      lv.each_object_selected do |obj|
        obj.shape.shapes.erase(obj.shape)
      end
  
      ensure 
      lv.commit
    end
  
  end
  
• Matthias

  August 2013 edited November -1

  Hallo,

  "erase" in the menu is basically a boolean "not", "mask" is "and" and "diff" is "xor".

  Is that comment helpful?

  Matthias
• Matthias

  September 2013 edited November -1

  Here's one more comment:

  The boolean operations are available with EdgeProcessor#boolean_p2p:

  # "not" aka "erase":
  edge.boolean_p2p([ polygon_1 ], [ polygon_2 ], EdgeProcessor::ModeANotB, false, false)
  
  # "xor" aka "diff":     
  edge.boolean_p2p([ polygon_1 ], [ polygon_2 ], EdgeProcessor::ModeXor, false, false)
  
  # "and" aka "mask":
  edge.boolean_p2p([ polygon_1 ], [ polygon_2 ], EdgeProcessor::ModeAnd, false, false)
  

  It's worth a note that using the boolean operations has some advantages over "simple_merge". The boolean operations will normalize self-overlapping regions of the original polygons automatically for example.

  Matthias