#
# rm-macl/lib/rm-macl/xpan/easer/expo-in.rb
#   dc 24/03/2013
#   dm 24/03/2013
# vr 1.0.0
module MACL
  class Easer
    class Expo::In < Expo

      register(:expo_in)

      def _ease(t, st, ch, d)
        t == 0 ? st : ch * (2 ** (10 * (t / d.to_f - 1))) + st
      end

    end
  end
end