static func + (AnimatablePair <First, Second>, AnimatablePair <First, Second>) -> AnimatablePair <First, Second>Adds two values and produces their sum.
２つの値を加算してそれらの合計を生成します。
static func += (inout AnimatablePair <First, Second>, AnimatablePair <First, Second>)Adds two values and stores the result in the left-hand-side variable.
２つの値を加算して、結果を左手側の変数に格納します。
static func - (AnimatablePair <First, Second>, AnimatablePair <First, Second>) -> AnimatablePair <First, Second>Subtracts one value from another and produces their difference.
static func -= (inout AnimatablePair <First, Second>, AnimatablePair <First, Second>)Subtracts the second value from the first and stores the difference in the left-hand-side variable.
２番目の値を最初のものから減じて、その差を左手側の変数の中に格納します。
var magnitudeSquared : DoubleThe dot-product of this animated pair with itself.
func scale(by: Double)Multiplies each component of this value by the given value.
この値の各構成要素をこの与えられた値で乗算します。