How To Use Tween | Learn All About Flutter Animations – Part 2: Во второй части Flutter Animations рассказывается как работает Tween.
http://www.sandromaglione.com/blog/2020/02/29/how-to-use-tween-learn-all-about-flutter-animations-part-2/
http://www.sandromaglione.com/blog/2020/02/29/how-to-use-tween-learn-all-about-flutter-animations-part-2/