Method: GuiGeo::Rectangle#disjoint

Defined in:
lib/gui_geometry/rectangle.rb

#disjoint(b) ⇒ Object

return 1-3 rectangles which, together, cover exactly the same area as self and b, but do not overlapp



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# File 'lib/gui_geometry/rectangle.rb', line 117

def disjoint(b)
  return self if !b || contains(b)
  return b if b.contains(self)
  return self,b unless overlaps?(b)
  tl_contained = contains?(b.tl) ? 1 : 0
  tr_contained = contains?(b.tr) ? 1 : 0
  bl_contained = contains?(b.bl) ? 1 : 0
  br_contained = contains?(b.br) ? 1 : 0
  sum = tl_contained + tr_contained + bl_contained + br_contained
  case sum
  when 0 # rectangles form a plus "+"
    if b.y < self.y
      r1,r2 = b,self
    else
      r1,r2 = self,b
    end
    tl1 = r1.tl
    br1 = point(r1.right, r2.top)
    tl2 = point(r1.left, r2.bottom)
    br2 = r1.br
    [
      r2,
      rect(tl1,br1-tl1),
      rect(tl2,br2-tl2),
    ]
  when 1
  when 2
  else raise "internal error in disjoint - cases 3 and 4 should be taken care of by the return-tests at the top of the method"
  end




end