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Flutter Animations: How to Build Smooth, Production-Grade Motion from Scratch

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A Flutter developer guide outlines the full journey from basic animations to production-ready implementations that maintain 60 fps on low-end devices. The article distinguishes between implicit animations, which handle simple state-driven transitions automatically, and explicit animations, which give developers full control over timing, sequencing, and physics. A key insight shared is that frame drops in production often stem not from animation duration but from what is being animated and how the widget tree rebuilds. The guide introduces the mental model of 'controller drives value, value drives paint' as the foundation for understanding all Flutter animation patterns. Practical code examples are provided at each stage, covering AnimationController setup, Tween mapping, and the use of AnimatedBuilder for efficient rebuilds.

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