## # This class represents an arbitrary shape by a series of points. # # Autor - Artur Camelo

class Shape

##
# Creates a new shape described by a +polyline+.
#
# If the +polyline+ does not end at the same point it started at the
# first pointed is copied and placed at the end of the line.
#
# An ArgumentError is raised if the line crosses itself, but shapes may
# be concave.
def initialize polyline
  # ...
end

end