backward direction duration during forward from jump onSeek onSeek onSeek onStep onStep onStep peek peek peek point progress seek seek seek step step step to tween via via

via() [2/2] tween<T, Ts...>& via ( int  index, Fs...  fs  ) Specifies the easing function for a specific currentPoint. Points starts at index 0. The index 0 refers to the first to call. Using this function without adding a currentPoint with to leads to undefined behaviour. Parameters index The tween currentPoint index fs The functions Returns *this See also tweeny::easing