nib_motion 0.2.1

A declarative, physics-based animation framework for Flutter. Inspired by Framer Motion — springs, gestures, variants, presence, scroll, FLIP layout, and GPU shader effects with zero external dependencies.

0.2.1

• Added example app demonstrating core primitives.
• Fixed curly_braces_in_flow_control_structures lint issues.
• Improved pub.dev package description and metadata.
• Added CI/CD via GitHub Actions.

0.2.0

Framework expansion: text animation, GPU shaders, presets, gestures, timeline orchestration, scroll utilities, path animation, and debug tools.

• Text: NibText (per-character/word/line stagger), NibTypewriter, NibGradientText, NibTextReveal, NibTextConfig.
• Shaders: GLSL shimmer/dissolve/gradient_sweep fragment shaders, NibShimmer, NibDissolve, NibShaderLoader; NibMotionConfig.init() to preload shaders and set process-wide defaults at startup.
• Presets: NibAnimPresets (shake/bounceIn/pulse/rubberBand/wiggle/ fade*/zoom* constants), NibShake, NibBounce, NibPulse, NibFloat, NibFlip, NibRubberBand.
• Gestures: NibDraggable (bounded/elastic drag with snap-back/target), NibPinch (pinch-to-zoom), NibSwipeDismiss.
• Timeline: NibTimeline / NibTimelineEntry for multi-controller orchestration, NibAnimationSequence fluent builder (animate/wait/call/loop).
• Scroll: NibParallax, NibScrollReveal.
• Path: NibPathMotion (move a widget along a Path), NibDrawPath (progressively reveal a stroked Path).
• Debug: NibMotionDebugger, NibPerfOverlay, NibMotionRegistry.
• Framework: NibMotionProvider, Widget.animate()/.shimmer()/ .revealOnScroll() extensions, int.ms/int.seconds duration shorthand.
• Fix: NibNavBar icons intermittently failed to render in release/AOT builds (most visibly the first item, sometimes all of them) — the old implementation pre-rendered each icon to a bitmap captured from an off-screen RepaintBoundary that sat fully occluded behind the bar's CustomPaint every frame, which the engine can skip rasterizing in release builds. Icons are now real Icon widgets scaled via Transform.scale, which stay crisp at any scale with no bitmap, no off-screen capture, and no race.

0.1.0

Initial release.

• NibMotion: declarative, physics-based animation widget driving opacity, translation, scale, rotation, skew, color, border radius, and box shadow via initial, animate, and exit.
• NibAnim / NibTransition: immutable animation snapshots and tween/spring transition descriptions, with springGentle, springSnappy, and springWobbly presets.
• Spring physics (NibSpringDescription, SpringSolver) and inertia-based coasting (InertiaSolver) for natural motion.
• Gesture-driven animation: whileTap, whileHover, whileFocus.
• Dragging via NibDragConfig — axis locking, constraints, elastic resistance, snap points, and spring-back/inertia/stay release behavior.
• NibPresence: plays exit animations for removed children before unmounting them.
• NibVariants: named animation states that propagate from a parent NibMotion to descendants, with staggerChildren/delayChildren.
• NibMotionController: imperative control of animations and multi-step sequences from outside the widget tree.
• NibKeyframe / computeAnimFromKeyframes: multi-stop enter animations.
• NibMotionList: a NibMotion-wrapped, optionally-staggered list.
• NibLayoutGroup: animates children to their new positions on layout changes using the FLIP technique.
• ScrollMotionBridge / NibScrollMotion / NibMotionValues: tie MotionValues directly to scroll position, bypassing the animation system entirely.
• MotionValue<T> / DerivedMotionValue / mapRange: reactive value containers with derived/mapped values.
• NibMotionConfig: app-wide defaults and reduced-motion support.