140 lines
3.9 KiB
Dart
140 lines
3.9 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import '../../core/config/app_config.dart';
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/// 3D 化身查看组件
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///
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/// 服务端预渲染帧序列（36 帧绕 Y 轴旋转 PNG）轮播模拟 3D；
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/// framesUrl 为空时降级为静态占位。
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class AvatarViewer extends StatefulWidget {
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final String? glbUrl;
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final String? framesUrl;
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final String title;
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final String subtitle;
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final double height;
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const AvatarViewer({
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super.key,
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this.glbUrl,
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this.framesUrl,
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required this.title,
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required this.subtitle,
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this.height = 360,
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});
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@override
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State<AvatarViewer> createState() => _AvatarViewerState();
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}
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class _AvatarViewerState extends State<AvatarViewer> {
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static const int _frameCount = 36;
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Timer? _timer;
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int _frame = 0;
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@override
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void initState() {
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super.initState();
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if (widget.framesUrl != null && widget.framesUrl!.isNotEmpty) {
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_timer = Timer.periodic(const Duration(milliseconds: 120), (_) {
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setState(() => _frame = (_frame + 1) % _frameCount);
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});
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}
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}
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@override
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void dispose() {
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_timer?.cancel();
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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 framesUrl = widget.framesUrl;
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if (framesUrl != null && framesUrl.isNotEmpty) {
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final frameUrl = AppConfig.resolveUrl(
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'$framesUrl/frame_${_frame.toString().padLeft(3, '0')}.png');
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final scheme = Theme.of(context).colorScheme;
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return Container(
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height: widget.height,
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width: double.infinity,
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clipBehavior: Clip.antiAlias,
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [
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scheme.primaryContainer,
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scheme.primary.withValues(alpha: 0.3),
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],
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),
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borderRadius: BorderRadius.circular(16),
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),
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child: Stack(
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alignment: Alignment.bottomCenter,
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children: [
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Positioned.fill(
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child: Image.network(
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frameUrl,
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fit: BoxFit.contain,
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errorBuilder: (_, _, _) => _placeholder(context),
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),
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),
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Padding(
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padding: const EdgeInsets.only(bottom: 10),
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child: Text(
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widget.subtitle,
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style: const TextStyle(
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color: Colors.white, fontSize: 12, shadows: [
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Shadow(color: Colors.black45, blurRadius: 4),
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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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return _placeholder(context);
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}
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Widget _placeholder(BuildContext context) {
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final scheme = Theme.of(context).colorScheme;
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return Container(
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height: widget.height,
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width: double.infinity,
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [
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scheme.primaryContainer,
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scheme.primary.withValues(alpha: 0.3),
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],
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),
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borderRadius: BorderRadius.circular(16),
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),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(Icons.accessibility_new, size: 72, color: scheme.primary),
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const SizedBox(height: 12),
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Text(widget.title,
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style: const TextStyle(
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fontSize: 16, fontWeight: FontWeight.bold)),
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const SizedBox(height: 4),
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Padding(
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padding: const EdgeInsets.symmetric(horizontal: 24),
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child: Text(
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widget.subtitle.isEmpty ? '3D 渲染服务未就绪' : widget.subtitle,
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textAlign: TextAlign.center,
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style: const TextStyle(color: Colors.grey, fontSize: 12),
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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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