easing_functions highest_frame_count key_frame position tween_frame_counts values_t

easing_functions template<typename... ValueTypes> value_easing_functions_t easing_functions Represents a tuple of easing function objects for each value component in a key frame. This variable contains easing functions used to interpolate or transform individual value components over time in a tweening operation. Each easing function is specified as a callable object (e.g., a lambda or function) following the signature (float progress, ValueType start, ValueType end) -> ValueType. It is used within the context of the tween system to determine how intermediate values between this key frame and the next are computed based on the specified easing functions.