diff options
| -rw-r--r-- | lib/level.dart | 91 | ||||
| -rw-r--r-- | lib/simfile.dart | 109 |
2 files changed, 181 insertions, 19 deletions
diff --git a/lib/level.dart b/lib/level.dart index 1391f8a..01083e2 100644 --- a/lib/level.dart +++ b/lib/level.dart @@ -3,6 +3,7 @@ import 'dart:io'; import 'package:flutter/material.dart'; import 'package:audioplayers/audioplayers.dart'; +import 'package:sense_the_rhythm/simfile.dart'; class Level extends StatefulWidget { const Level({super.key, required this.stepmaniaFolderPath}); @@ -12,8 +13,27 @@ class Level extends StatefulWidget { State<Level> createState() => _LevelState(); } +enum ArrowDirection { + left(Icons.arrow_back), + down(Icons.arrow_downward), + up(Icons.arrow_upward), + right(Icons.arrow_forward); + + const ArrowDirection(this.icon); + + final IconData icon; +} + +class Note { + final double time; + final ArrowDirection direction; + + const Note({required this.time, required this.direction}); +} + class _LevelState extends State<Level> { final player = AudioPlayer(); + Simfile? simfile; bool _isPlaying = true; Duration? _duration; Duration? _position; @@ -21,6 +41,8 @@ class _LevelState extends State<Level> { StreamSubscription? _durationSubscription; StreamSubscription? _positionSubscription; + List<Note> notes = []; + @override void setState(VoidCallback fn) { // Subscriptions only can be closed asynchronously, @@ -51,10 +73,7 @@ class _LevelState extends State<Level> { _positionSubscription = player.onPositionChanged.listen( (p) => setState(() => _position = p), ); - } - @override - Widget build(BuildContext context) { player.onDurationChanged.listen((Duration d) { // print('Max duration: $d'); setState(() => _duration = d); @@ -65,12 +84,47 @@ class _LevelState extends State<Level> { setState(() => _position = p); }); + String simfilePath = Directory(widget.stepmaniaFolderPath) + .listSync() + .firstWhere((entity) => entity.path.endsWith('.sm'), + orElse: () => File('')) + .path; + String audioPath = Directory(widget.stepmaniaFolderPath) .listSync() .firstWhere((entity) => entity.path.endsWith('.ogg'), orElse: () => File('')) .path; + + simfile = Simfile(simfilePath); + simfile!.load(); + + double bpm = simfile!.bpms.entries.first.value; + + for (final (measureIndex, measure) + in simfile!.chartSimplest!.measures!.indexed) { + for (final (noteIndex, noteData) in measure.indexed) { + int arrowIndex = noteData.indexOf('1'); + if (arrowIndex < 0 || arrowIndex > 3) { + continue; + } + notes.add(Note( + time: (measureIndex * 4.0 + + (noteIndex.toDouble() / measure.length) * 4.0) * + 1.0 / + bpm + + simfile!.offset / 60.0, + direction: ArrowDirection.values[arrowIndex])); + } + } + + print(audioPath); + player.play(DeviceFileSource(audioPath)); + } + + @override + Widget build(BuildContext context) { return Scaffold( appBar: AppBar( leading: IconButton( @@ -107,18 +161,16 @@ class _LevelState extends State<Level> { )), ), body: Stack(children: [ - Arrow( - position: -100.0, - ), - Arrow( - position: 00.0, - ), - Arrow( - position: 100.0, - ), - Arrow( - position: 200.0, - ), + ...notes.map((note) { + return Arrow( + position: _position != null + ? (note.time - _position!.inMilliseconds / 60000.0) * + 20 * + MediaQuery.of(context).size.height + : 0.0, + direction: note.direction, + ); + }), Positioned( top: 50, width: MediaQuery.of(context).size.width, @@ -155,15 +207,16 @@ class _LevelState extends State<Level> { class Arrow extends StatelessWidget { final double position; + final ArrowDirection direction; - const Arrow({super.key, required this.position}); + const Arrow({super.key, required this.position, required this.direction}); @override Widget build(BuildContext context) { return Positioned( - left: MediaQuery.of(context).size.width / 2 - 25, // Center the arrow - top: position, - child: Icon(size: 100, Icons.arrow_forward), + left: MediaQuery.of(context).size.width / 2 - 50, // Center the arrow + bottom: position + 50, + child: Icon(size: 100, color: Colors.redAccent.shade400, direction.icon), ); } } diff --git a/lib/simfile.dart b/lib/simfile.dart new file mode 100644 index 0000000..2174de9 --- /dev/null +++ b/lib/simfile.dart @@ -0,0 +1,109 @@ +import 'dart:ffi'; +import 'dart:io'; + +enum Difficulty { Beginner, Easy, Medium, Hard, Challenge, Edit } + +// These are the standard note values: +// +// 0 – No note +// 1 – Normal note +// 2 – Hold head +// 3 – Hold/Roll tail +// 4 – Roll head +// M – Mine (or other negative note) +// +// Later versions of StepMania accept other note values which may not work in older versions: +// +// K – Automatic keysound +// L – Lift note +// F – Fake note + +RegExp noteTypes = RegExp(r'^([012345MKLF]+)\s*([,;])?'); + +class Chart { + String? chartType; + // Description/author + String? author; + // Difficulty (one of Beginner, Easy, Medium, Hard, Challenge, Edit) + Difficulty? difficulty; + // Numerical meter + int? numericalMeter; + // Groove radar values, generated by the program + String? radarValues; + + List<List<String>>? measures; +} + +class Simfile { + String path; + String? lines; + + // tags of simfile + Map<String, String> tags = {}; + + Chart? chartSimplest; + + Map<double, double> bpms = {}; + double offset = 0; + + Simfile(this.path); + + void load() { + lines = File(path).readAsStringSync(); + + RegExp commentsRegExp = RegExp(r'//.*$'); + lines = lines?.replaceAll(commentsRegExp, ''); + RegExp fieldDataRegExp = RegExp(r'#([^;]+):([^;]*);'); + + for (final fieldData in fieldDataRegExp.allMatches(lines!)) { + List<String> keys = + fieldData[1]!.split(':').map((key) => key.trim()).toList(); + String value = fieldData[2]!; + if (keys[0] == "BPMS") { + for (final pairRaw in value.split(',')) { + List<String> pair = pairRaw.split('='); + if (pair.length != 2) { + continue; + } + double time = double.parse(pair[0]); + double bpm = double.parse(pair[1]); + bpms[time] = bpm; + } + } + + if (keys[0] == "OFFSET") { + offset = double.parse(value); + } + + if (keys[0] != "NOTES") { + tags[keys[0]] = value; + continue; + } + + Chart chart = Chart(); + chart.chartType = keys[1]; + chart.author = keys[2]; + chart.difficulty = Difficulty.values.byName(keys[3]); + chart.numericalMeter = int.parse(keys[4]); + chart.radarValues = keys[5]; + + if (chartSimplest == null || + (chart.difficulty!.index <= chartSimplest!.difficulty!.index && + chart.numericalMeter! <= chartSimplest!.numericalMeter!)) { + List<List<String>> measures = []; + for (final measureRaw in value.split(',')) { + List<String> measure = []; + for (final noteRaw in measureRaw.split('\n')) { + String note = noteRaw.trim(); + if (noteTypes.hasMatch(note)) { + measure.add(note); + } + } + measures.add(measure); + } + chart.measures = measures; + chartSimplest = chart; + } + } + } +} |