Module: AnimateIt::Easing

Defined in:
lib/animate_it/easing.rb

Class Method Summary collapse

Class Method Details

.ease_in(progress) ⇒ Object 



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# File 'lib/animate_it/easing.rb', line 26

def ease_in(progress)
  progress * progress
end

.ease_in_out(progress) ⇒ Object 



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# File 'lib/animate_it/easing.rb', line 34

def ease_in_out(progress)
  return 2 * progress * progress if progress < 0.5

  1 - ((((-2 * progress) + 2)**2) / 2.0)
end

.ease_out(progress) ⇒ Object 



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# File 'lib/animate_it/easing.rb', line 30

def ease_out(progress)
  1 - ((1 - progress) * (1 - progress))
end

.linear(progress) ⇒ Object 



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# File 'lib/animate_it/easing.rb', line 22

def linear(progress)
  progress
end

.resolve(easing) ⇒ Object 



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# File 'lib/animate_it/easing.rb', line 5

def resolve(easing)
  return easing if easing.respond_to?(:call)

  case easing
  when nil, :linear
    method(:linear)
  when :ease_in
    method(:ease_in)
  when :ease_out
    method(:ease_out)
  when :ease_in_out
    method(:ease_in_out)
  else
    raise ArgumentError, "Unknown easing: #{easing.inspect}"
  end
end