feat: procedural season background with drifting petals
This commit is contained in:
@@ -12,6 +12,7 @@ import '../widgets/board_painter.dart';
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import '../widgets/board_widget.dart';
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import '../widgets/hud_widget.dart';
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import '../widgets/piece_painter.dart';
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import '../widgets/season_background.dart';
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import '../widgets/tray_widget.dart';
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/// Renders whatever session [gameSessionProvider] holds; callers start the
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@@ -140,56 +141,64 @@ class _GameScreenState extends ConsumerState<GameScreen> {
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final draggedTopLeft = _draggedPieceTopLeft(view);
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final boardBox = _boardBox;
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final theme = ref.watch(activeThemeProvider);
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return Scaffold(
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body: SafeArea(
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child: Stack(
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key: _stackKey,
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children: [
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Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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children: [
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HudWidget(view: view),
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Expanded(
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child: Center(
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child: BoardWidget(
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key: _boardKey,
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view: view,
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ghost: ghost,
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backgroundColor: Colors.transparent,
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body: Stack(
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fit: StackFit.expand,
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children: [
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SeasonBackground(theme: theme),
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SafeArea(
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child: Stack(
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key: _stackKey,
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children: [
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Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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children: [
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HudWidget(view: view),
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Expanded(
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child: Center(
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child: BoardWidget(
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key: _boardKey,
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view: view,
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ghost: ghost,
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),
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),
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),
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TrayWidget(
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tray: view.tray,
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draggingIndex: _dragIndex,
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onDragStart: (index, global) => setState(() {
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_dragIndex = index;
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_dragGlobal = global;
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}),
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onDragUpdate: (global) =>
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setState(() => _dragGlobal = global),
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onDragEnd: () => _onDragEnd(view),
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),
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],
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),
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),
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if (_dragIndex != null &&
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draggedTopLeft != null &&
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boardBox != null &&
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_dragIndex! < view.tray.length)
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_draggedPieceOverlay(view, draggedTopLeft, boardBox),
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if (view.phase != GamePhase.playing) _resultOverlay(view),
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if (Navigator.of(context).canPop())
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Positioned(
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top: 4,
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left: 4,
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child: IconButton(
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icon: const Icon(Icons.close, color: Colors.white54),
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onPressed: () => Navigator.of(context).pop(),
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),
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),
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TrayWidget(
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tray: view.tray,
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draggingIndex: _dragIndex,
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onDragStart: (index, global) => setState(() {
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_dragIndex = index;
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_dragGlobal = global;
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}),
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onDragUpdate: (global) =>
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setState(() => _dragGlobal = global),
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onDragEnd: () => _onDragEnd(view),
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),
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],
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),
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],
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),
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if (_dragIndex != null &&
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draggedTopLeft != null &&
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boardBox != null &&
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_dragIndex! < view.tray.length)
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_draggedPieceOverlay(view, draggedTopLeft, boardBox),
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if (view.phase != GamePhase.playing) _resultOverlay(view),
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if (Navigator.of(context).canPop())
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Positioned(
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top: 4,
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left: 4,
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child: IconButton(
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icon: const Icon(Icons.close, color: Colors.white54),
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onPressed: () => Navigator.of(context).pop(),
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),
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),
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],
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),
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),
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],
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),
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);
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}
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@@ -0,0 +1,134 @@
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import 'dart:math' as math;
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import 'package:flutter/material.dart';
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import '../../game/models/season.dart';
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import '../theme/palette.dart';
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/// Set true in tests (flutter_test_config.dart): looping ambience would make
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/// pumpAndSettle spin forever.
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bool debugDisableLoopingAnimations = false;
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/// Full-screen season ambience: vertical gradient plus drifting particles
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/// (petals for season 1). Pure procedural — no image assets required; an AI
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/// illustration layer can be added on top later without touching callers.
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class SeasonBackground extends StatefulWidget {
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const SeasonBackground({super.key, required this.theme});
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final SeasonTheme theme;
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@override
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State<SeasonBackground> createState() => _SeasonBackgroundState();
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}
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class _SeasonBackgroundState extends State<SeasonBackground>
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with SingleTickerProviderStateMixin {
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late final AnimationController _drift = AnimationController(
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vsync: this,
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duration: const Duration(seconds: 18),
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);
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@override
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void initState() {
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super.initState();
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if (!debugDisableLoopingAnimations) _drift.repeat();
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}
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@override
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void dispose() {
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_drift.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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final colors = ThemeColors(widget.theme);
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return RepaintBoundary(
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child: AnimatedBuilder(
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animation: _drift,
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builder: (context, _) => CustomPaint(
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size: Size.infinite,
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painter: _AmbiencePainter(colors: colors, t: _drift.value),
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),
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),
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);
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}
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}
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class _AmbiencePainter extends CustomPainter {
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const _AmbiencePainter({required this.colors, required this.t});
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final ThemeColors colors;
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final double t;
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static const _particles = 9;
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// Deterministic pseudo-random in [0, 1) from an index.
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static double _hash(int i, double salt) {
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final v = math.sin(i * 12.9898 + salt) * 43758.5453;
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return v - v.floorToDouble();
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}
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@override
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void paint(Canvas canvas, Size size) {
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final rect = Offset.zero & size;
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canvas.drawRect(
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rect,
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Paint()
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..shader = LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: colors.gradient,
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stops: colors.gradient.length == 3
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? const [0.0, 0.55, 1.0]
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: null,
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).createShader(rect),
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);
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if (colors.particleType == 'none') return;
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for (var i = 0; i < _particles; i++) {
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final speed = 0.5 + _hash(i, 1) * 0.6;
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final phase = _hash(i, 2);
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final fall = (t * speed + phase) % 1.15 - 0.075;
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final x = (_hash(i, 3) +
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0.05 * math.sin(t * 2 * math.pi + i * 1.7)) *
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size.width;
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final y = fall * size.height;
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final scale = 7 + _hash(i, 4) * 9;
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final angle = t * 2 * math.pi * (0.4 + _hash(i, 5)) + i;
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_paintParticle(canvas, Offset(x, y), scale, angle);
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}
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}
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void _paintParticle(Canvas canvas, Offset c, double s, double angle) {
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canvas.save();
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canvas.translate(c.dx, c.dy);
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canvas.rotate(angle);
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final paint = Paint();
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switch (colors.particleType) {
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case 'snow':
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paint.color = Colors.white.withValues(alpha: 0.35);
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canvas.drawCircle(Offset.zero, s * 0.4, paint);
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case 'leaves':
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paint.color = const Color(0xFFE8945A).withValues(alpha: 0.35);
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canvas.drawOval(
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Rect.fromCenter(center: Offset.zero, width: s, height: s * 0.55),
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paint);
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default: // petals
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paint.color = colors.accent.withValues(alpha: 0.30);
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canvas.drawOval(
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Rect.fromCenter(
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center: Offset(s * 0.18, 0), width: s, height: s * 0.62),
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paint);
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canvas.drawOval(
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Rect.fromCenter(
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center: Offset(-s * 0.18, 0), width: s, height: s * 0.62),
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paint);
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}
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canvas.restore();
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}
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@override
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bool shouldRepaint(_AmbiencePainter old) =>
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old.t != t || old.colors != colors;
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}
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