Animation tools that are not provided by the Flutter SDK
- Development UI that let's a user play an animation forward and backward to fine-tune the animation. [...]
- A transition that supports forward and reverse playback. [...]
- Use a PhaseController to instruct the AnimationPlayer to advance its playhead to the given Phase and percent. [...]
- A series of Phases such that each Phase can be played forward and backward.
- Gesture detector that reports user drags in terms of PolarCoords with the origin at the center of the provided child. [...]