// ==================================================================
// ========== グローバル変数と設定 ==========
// ==================================================================
const noteScales = ["B6","A#6","A6","G#6","G6","F#6","F6","E6","D#6","D6","C#6","C6","B5","A#5","A5","G#5","G5","F#5","F5","E5","D#5","D5","C#5","C5","B4","A#4","A4","G#4","G4","F#4","F4","E4","D#4","D4","C#4","C4","B3","A#3","A3","G#3","G3","F#3","F3","E3","D#3","D3","C#3","C3","B2","A#2","A2","G#2","G2","F#2","F2","E2","D#2","D2","C#2","C2","B1","A#1","A1","G#1","G1","F#1","F1","E1","D#1","D1","C#1","C1"];
let numColumns = 16;
let pianoRoll1 = []; let pianoRoll2 = [];
let pianoRoll3 = []; let pianoRoll4 = [];
const instruments = {
"synth": (polyphony = 8) => new Tone.PolySynth(Tone.Synth, { maxPolyphony: polyphony }).toDestination(),
"piano": () => new Tone.Sampler({ urls: { "C3":"C3.mp3", "C4":"C4.mp3", "C5":"C5.mp3", "C6":"C6.mp3" }, baseUrl: "https://nbrosowsky.github.io/tonejs-instruments/samples/piano/" }).toDestination(),
"violin": () => new Tone.Sampler({ urls: { "A3":"A3.mp3", "A4":"A4.mp3", "A5":"A5.mp3", "C4":"C4.mp3" }, baseUrl: "https://nbrosowsky.github.io/tonejs-instruments/samples/violin/" }).toDestination(),
"trumpet": () => new Tone.Sampler({ urls: { "C4":"C4.mp3", "D5":"D5.mp3", "G3":"G3.mp3" }, baseUrl: "https://nbrosowsky.github.io/tonejs-instruments/samples/trumpet/" }).toDestination()
};
let instrument1 = instruments.synth(); let instrument2 = instruments.synth();
let instrument3 = instruments.piano(); let instrument4 = instruments.piano();
let part1, part2, part3, part4;
let currentOctave = 4; let activeKeyboardNote = null;
let currentTrack = "track1";
let canvas, ctx, timelineCanvas, timelineCtx;
const cellWidth = 50; const cellHeight = 17; const pitchHeaderWidth = 50;
let animationFrameId = null; let playbackCursor_16th = 0;
let isAuditionMode = false; let isDottedMode = false;
let currentNoteLengthBase = "8n";
// ▼▼▼ 範囲選択とノート操作のための新しい変数 ▼▼▼
let selectedNotes = []; // 選択されたノートオブジェクトを格納
let isDragging = false;
let isSelecting = false; // 範囲選択中かどうかのフラグ
let dragMode = null;
let selectedNote = null;
let dragStart_16th = 0;
let dragStartNote = null;
let selectionRect = { startX: 0, startY: 0, currentX: 0, currentY: 0 }; // 範囲選択の矩形座標
// ==================================================================
// ========== 初期化処理 ==========
// ==================================================================
document.addEventListener("DOMContentLoaded", () => {
canvas = document.getElementById("pianoRollCanvas");
ctx = canvas.getContext("2d");
timelineCanvas = document.getElementById("timelineCanvas");
timelineCtx = timelineCanvas.getContext("2d");
setupMainControls();
setupNoteTools();
setupEventListeners();
document.getElementById("setMeasuresButton").addEventListener("click", setNumMeasures);
document.getElementById("showDataButton").addEventListener("click", toggleDataDisplay);
resizeCanvas();
redrawAll();
});
window.onload = () => drawKeyboard();
// ==================================================================
// ========== UIセットアップ ==========
// ==================================================================
function setupMainControls() {
document.getElementById("playButton").addEventListener("click", playMusic);
document.getElementById("pauseButton").addEventListener("click", pauseMusic);
document.getElementById("stopButton").addEventListener("click", stopMusic);
const trackSelector = document.getElementById("track-selector");
trackSelector.querySelectorAll('.tool-item').forEach(item => {
if (item.dataset.track === currentTrack) item.classList.add('selected');
item.addEventListener('click', () => {
trackSelector.querySelector('.selected').classList.remove('selected');
item.classList.add('selected');
currentTrack = item.dataset.track;
redrawAll();
updatePianoRollTextBox();
});
});
const inst1Select = document.getElementById("instrumentSelect1");
const inst2Select = document.getElementById("instrumentSelect2");
const inst3Select = document.getElementById("instrumentSelect3");
const inst4Select = document.getElementById("instrumentSelect4");
inst1Select.addEventListener('change', () => instrument1 = instruments[inst1Select.value]());
inst2Select.addEventListener('change', () => instrument2 = instruments[inst2Select.value]());
inst3Select.addEventListener('change', () => instrument3 = instruments[inst3Select.value]());
inst4Select.addEventListener('change', () => instrument4 = instruments[inst4Select.value]());
}
function setupNoteTools() {
const noteLengthSelector = document.getElementById("note-length-selector");
noteLengthSelector.querySelectorAll('.tool-item[data-length]').forEach(tool => {
if (tool.dataset.length === currentNoteLengthBase) {
tool.classList.add('selected');
}
tool.addEventListener('click', () => {
noteLengthSelector.querySelector('.selected')?.classList.remove('selected');
tool.classList.add('selected');
currentNoteLengthBase = tool.dataset.length;
});
});
const dotButton = document.getElementById("dotButton");
dotButton.addEventListener('click', () => {
isDottedMode = !isDottedMode;
dotButton.classList.toggle('active', isDottedMode);
});
const auditionButton = document.getElementById("auditionButton");
auditionButton.addEventListener('click', () => {
isAuditionMode = !isAuditionMode;
auditionButton.classList.toggle('active', isAuditionMode);
});
}
/**
* 現在選択されている音符の長さを計算して返す（付点を考慮）
* @returns {string} Tone.jsが解釈できる音長表記 (例: "4n", "8n.")
*/
function getCurrentNoteLength() {
// 付点モードがオンの場合
if (isDottedMode) {
// 選択されている基本の長さに "." を付けて返す
return `${currentNoteLengthBase}.`;
}
// 付点モードがオフの場合は、そのまま基本の長さを返す
return currentNoteLengthBase;
}
// ==================================================================
// ========== Canvas描画関連 ==========
// ==================================================================
function resizeCanvas() {
const newWidth = pitchHeaderWidth + (cellWidth * numColumns);
const newHeight = cellHeight * noteScales.length;
canvas.width = newWidth;
canvas.height = newHeight;
timelineCanvas.width = newWidth;
timelineCanvas.height = 30;
}
function redrawAll() {
drawPianoRoll();
drawTimeline();
}
function drawPianoRoll() {
if (!ctx) return;
ctx.fillStyle = "#333";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.font = "12px Arial";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
noteScales.forEach((scale, i) => {
const y = i * cellHeight;
if (scale.includes("#")) { ctx.fillStyle = "#383838"; } else { ctx.fillStyle = "#484848"; }
ctx.fillRect(0, y, canvas.width, cellHeight);
ctx.strokeStyle = "#555";
ctx.beginPath();
ctx.moveTo(pitchHeaderWidth, y);
ctx.lineTo(canvas.width, y);
ctx.stroke();
ctx.fillStyle = "white";
ctx.fillText(scale, pitchHeaderWidth / 2, y + cellHeight / 2);
});
ctx.strokeStyle = "#999";
ctx.lineWidth = 1;
ctx.beginPath();
ctx.moveTo(pitchHeaderWidth, 0);
ctx.lineTo(pitchHeaderWidth, canvas.height);
ctx.stroke();
ctx.strokeStyle = "#4a4a4a";
ctx.lineWidth = 1;
for (let i = 0; i < numColumns * 2; i++) {
if (i % 2 !== 0) {
const x = pitchHeaderWidth + (i * (cellWidth / 2));
ctx.beginPath();
ctx.moveTo(x, 0);
ctx.lineTo(x, canvas.height);
ctx.stroke();
}
}
for (let i = 0; i <= numColumns; i++) {
const x = pitchHeaderWidth + i * cellWidth;
if (i % 8 === 0) { ctx.strokeStyle = "#999"; ctx.lineWidth = 2; }
else if (i % 4 === 0) { ctx.strokeStyle = "#666"; ctx.lineWidth = 1; }
else { ctx.strokeStyle = "#555"; ctx.lineWidth = 1; }
ctx.beginPath();
ctx.moveTo(x, 0);
ctx.lineTo(x, canvas.height);
ctx.stroke();
}
ctx.lineWidth = 1;
const inactiveColor = (hex) => `${hex}80`;
drawNotes(pianoRoll1, currentTrack === 'track1' ? "#4CAF50" : inactiveColor("#4CAF50"));
drawNotes(pianoRoll2, currentTrack === 'track2' ? "#3498DB" : inactiveColor("#3498DB"));
drawNotes(pianoRoll3, currentTrack === 'track3' ? "#FFC107" : inactiveColor("#FFC107"));
drawNotes(pianoRoll4, currentTrack === 'track4' ? "#E91E63" : inactiveColor("#E91E63"));
if (isSelecting) {
ctx.fillStyle = "rgba(52, 152, 219, 0.3)"; // 半透明の青
ctx.strokeStyle = "rgba(52, 152, 219, 0.8)";
ctx.lineWidth = 1;
const rect = getNormalizedSelectionRect();
ctx.fillRect(rect.x, rect.y, rect.w, rect.h);
ctx.strokeRect(rect.x, rect.y, rect.w, rect.h);
}
}
function drawNotes(pianoRollData, color) {
pianoRollData.forEach(note => {
if (note.scale === "rest") return;
const startCol_8th = note.start_16th / 2;
const durationInCols_8th = note.length_16th / 2;
const rowIndex = noteScales.indexOf(note.scale);
if (rowIndex !== -1) {
const x = pitchHeaderWidth + startCol_8th * cellWidth;
const y = rowIndex * cellHeight;
const noteWidth = durationInCols_8th * cellWidth - 1;
ctx.fillStyle = color;
ctx.fillRect(x + 1, y + 1, noteWidth, cellHeight - 2);
// ▼▼▼ 選択されているノートにハイライトを追加 ▼▼▼
if (selectedNotes.includes(note)) {
ctx.strokeStyle = "white";
ctx.lineWidth = 2;
ctx.strokeRect(x + 1, y + 1, noteWidth, cellHeight - 2);
}
}
});
}
function drawTimeline() {
if (!timelineCtx) return;
const t_ctx = timelineCtx;
t_ctx.fillStyle = "#2c2c2c";
t_ctx.fillRect(0, 0, timelineCanvas.width, timelineCanvas.height);
t_ctx.font = "12px Arial";
t_ctx.textAlign = "left";
t_ctx.textBaseline = "middle";
t_ctx.fillStyle = "white";
const numMeasures = numColumns / 8;
for (let i = 0; i < numMeasures; i++) {
const measureX = pitchHeaderWidth + (i * 8) * cellWidth;
t_ctx.fillText(i + 1, measureX + 5, 15);
for (let j = 0; j < 8; j++) {
const beatX = measureX + j * cellWidth;
if (j === 0) { t_ctx.strokeStyle = "#999"; t_ctx.beginPath(); t_ctx.moveTo(beatX, 0); t_ctx.lineTo(beatX, 30); t_ctx.stroke(); }
else if (j % 2 === 0) { t_ctx.strokeStyle = "#666"; t_ctx.beginPath(); t_ctx.moveTo(beatX, 10); t_ctx.lineTo(beatX, 30); t_ctx.stroke(); }
else { t_ctx.strokeStyle = "#555"; t_ctx.beginPath(); t_ctx.moveTo(beatX, 20); t_ctx.lineTo(beatX, 30); t_ctx.stroke(); }
}
}
const endX = pitchHeaderWidth + numColumns * cellWidth;
t_ctx.strokeStyle = "#999";
t_ctx.beginPath();
t_ctx.moveTo(endX, 0);
t_ctx.lineTo(endX, 30);
t_ctx.stroke();
if (playbackCursor_16th >= 0) {
const cursorX = pitchHeaderWidth + (playbackCursor_16th / 2) * cellWidth;
timelineCtx.strokeStyle = "rgba(255, 0, 0, 0.8)";
timelineCtx.lineWidth = 2;
timelineCtx.beginPath();
timelineCtx.moveTo(cursorX, 0);
timelineCtx.lineTo(cursorX, 30);
timelineCtx.stroke();
timelineCtx.lineWidth = 1;
}
}
// ==================================================================
// ========== イベントハンドラ ==========
// ==================================================================
function setupEventListeners() {
canvas.addEventListener('mousedown', handleMouseDown);
canvas.addEventListener('mousemove', handleMouseMove);
canvas.addEventListener('mouseup', handleMouseUp);
canvas.addEventListener('mouseleave', handleMouseUp);
timelineCanvas.addEventListener('mousedown', handleTimelineClick);
window.addEventListener('keydown', handleKeyDown);
}
function getMousePos(event) {
const rect = canvas.getBoundingClientRect();
return { x: event.clientX - rect.left, y: event.clientY - rect.top };
}
function handleMouseDown(event) {
const pos = getMousePos(event);
if (pos.x < pitchHeaderWidth) return;
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
const clicked_16th_col = Math.floor((pos.x - pitchHeaderWidth) / (cellWidth / 2));
const scale = noteScales[Math.floor(pos.y / cellHeight)];
// クリックされたノートを探す
const clickedNote = targetPianoRoll.find(note =>
note.scale === scale &&
note.start_16th <= clicked_16th_col &&
clicked_16th_col < note.start_16th + note.length_16th
);
dragStart_16th = clicked_16th_col;
isDragging = true;
if (clickedNote) {
// --- ノートの上でクリック ---
selectedNote = clickedNote;
dragStartNote = { ...selectedNote };
// 既に選択されていたノートの上をクリックした場合 -> グループ移動モード
if (selectedNotes.includes(clickedNote)) {
dragMode = 'move-group';
// 全選択ノートの元の状態を保存
selectedNotes.forEach(note => note.originalState = { ...note });
} else {
// 選択されていないノートの上 -> 通常の単一ノート操作モード
const handleWidth = 4;
const xInNote = pos.x - (pitchHeaderWidth + selectedNote.start_16th / 2 * cellWidth);
if (xInNote < handleWidth) { dragMode = 'resize-left'; }
else if (xInNote > (selectedNote.length_16th / 2 * cellWidth) - handleWidth) { dragMode = 'resize-right'; }
else { dragMode = 'move'; }
}
} else {
// --- 空の場所でクリック ---
isSelecting = true;
selectionRect.startX = pos.x;
selectionRect.startY = pos.y;
selectionRect.currentX = pos.x;
selectionRect.currentY = pos.y;
selectedNotes = [];
}
}
function handleMouseMove(event) {
if (!isDragging && !isSelecting) return;
const pos = getMousePos(event);
const current_16th_col = Math.max(0, Math.floor((pos.x - pitchHeaderWidth) / (cellWidth / 2)));
const diff_16th = current_16th_col - dragStart_16th;
if (dragMode === 'move-group') {
// グループ移動
selectedNotes.forEach(note => {
note.start_16th = Math.max(0, note.originalState.start_16th + diff_16th);
});
}
else if (dragMode === 'move' && selectedNote) {
selectedNote.start_16th = Math.max(0, dragStartNote.start_16th + diff_16th);
}
else if (dragMode === 'resize-right' && selectedNote) {
selectedNote.length_16th = Math.max(1, dragStartNote.length_16th + diff_16th);
}
else if (dragMode === 'resize-left' && selectedNote) {
const newStart = dragStartNote.start_16th + diff_16th;
if (newStart < dragStartNote.start_16th + dragStartNote.length_16th) {
const finalNewStart = Math.max(0, newStart);
const newLength = dragStartNote.length_16th - (finalNewStart - dragStartNote.start_16th);
if (newLength >= 1) {
selectedNote.start_16th = finalNewStart;
selectedNote.length_16th = newLength;
}
}
}
else if (isSelecting) {
selectionRect.currentX = pos.x;
selectionRect.currentY = pos.y;
updateSelection();
}
redrawAll();
}
function handleMouseUp(event) {
if (!isDragging && !isSelecting) return;
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
const pos = getMousePos(event);
const up_16th_col = Math.floor((pos.x - pitchHeaderWidth) / (cellWidth / 2));
const scale = noteScales[Math.floor(pos.y / cellHeight)];
const isShortClick = dragStart_16th === up_16th_col;
if (isSelecting) {
// 範囲選択を確定
updateSelection();
if (selectionRect.startX === selectionRect.currentX && selectionRect.startY === selectionRect.currentY) {
// 空き地での短いクリックでノート作成
if (scale) {
const currentLength = getCurrentNoteLength();
if (currentLength !== 'rest') {
targetPianoRoll.push({
start_16th: up_16th_col,
scale: scale,
length_16th: Tone.Time(currentLength).toTicks() / Tone.Time("16n").toTicks()
});
}
}
}
} else if (isDragging) {
// 単一ノートの上で短いクリック -> 削除
if (isShortClick && dragMode !== 'move-group') {
const noteIndexToDelete = targetPianoRoll.indexOf(selectedNote);
if (noteIndexToDelete > -1) {
targetPianoRoll.splice(noteIndexToDelete, 1);
}
}
// グループ移動後のクリーンアップ
if (dragMode === 'move-group') {
selectedNotes.forEach(note => delete note.originalState);
}
}
targetPianoRoll.sort((a, b) => a.start_16th - b.start_16th);
isDragging = false;
isSelecting = false;
dragMode = null;
selectedNote = null;
dragStartNote = null;
redrawAll();
updatePianoRollTextBox();
}
function handleTimelineClick(event) {
if (Tone.Transport.state === 'started') return;
const rect = timelineCanvas.getBoundingClientRect();
const x = event.clientX - rect.left;
let clicked_16th_col;
if (x < pitchHeaderWidth) {
clicked_16th_col = 0;
} else {
clicked_16th_col = Math.round((x - pitchHeaderWidth) / (cellWidth / 2));
}
const max_16th_cols = numColumns * 2;
playbackCursor_16th = Math.min(clicked_16th_col, max_16th_cols);
Tone.Transport.seconds = playbackCursor_16th * Tone.Time("16n").toSeconds();
redrawAll();
}
function setNumMeasures() {
const measures = parseInt(document.getElementById("numMeasuresInput").value, 10);
if (!isNaN(measures) && measures > 0) {
numColumns = measures * 8;
resizeCanvas();
redrawAll();
} else {
alert("小節数は1以上の正の整数を入力してください。");
}
}
function handleKeyDown(event) {
if (selectedNotes.length === 0) return;
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
const isHarmonyTrack = currentTrack === 'track3' || currentTrack === 'track4';
let moved = false;
switch(event.key) {
case "ArrowUp":
event.preventDefault();
selectedNotes.forEach(note => {
const currentIndex = noteScales.indexOf(note.scale);
if (currentIndex > 0) note.scale = noteScales[currentIndex - 1];
});
moved = true;
break;
case "ArrowDown":
event.preventDefault();
selectedNotes.forEach(note => {
const currentIndex = noteScales.indexOf(note.scale);
if (currentIndex < noteScales.length - 1) note.scale = noteScales[currentIndex + 1];
});
moved = true;
break;
case "ArrowLeft":
event.preventDefault();
if (selectedNotes.every(note => note.start_16th > 0)) {
selectedNotes.forEach(note => note.start_16th -= 1);
moved = true;
}
break;
case "ArrowRight":
event.preventDefault();
const maxCols = numColumns * 2;
if(selectedNotes.every(note => (note.start_16th + note.length_16th) < maxCols)){
selectedNotes.forEach(note => note.start_16th += 1);
moved = true;
}
break;
case "Delete":
case "Backspace":
event.preventDefault();
selectedNotes.forEach(note => {
const index = targetPianoRoll.indexOf(note);
if (index > -1) targetPianoRoll.splice(index, 1);
});
selectedNotes = [];
moved = true;
break;
}
if (moved) {
redrawAll();
updatePianoRollTextBox();
}
}
// ==================================================================
// ========== MIDI & スクリーンキーボード入力 ==========
// ==================================================================
if (navigator.requestMIDIAccess) {
navigator.requestMIDIAccess().then(onMIDISuccess, onMIDIFailure);
}
function onMIDISuccess(midiAccess) {
document.getElementById("midistatus").innerText = "MIDI: 接続済み";
midiAccess.inputs.forEach(input => {
input.onmidimessage = handleMIDIMessage;
});
}
function onMIDIFailure() {
document.getElementById("midistatus").innerText = "MIDI: 接続失敗";
}
function handleMIDIMessage(event) {
const [status, note, velocity] = event.data;
const noteName = getNoteName(note);
if (status === 144 && velocity > 0) {
const instrument = eval(`instrument${currentTrack.slice(-1)}`);
instrument.triggerAttack(noteName, Tone.now(), velocity / 127);
recordNoteData({ scale: noteName, length: getCurrentNoteLength() });
} else if (status === 128 || (status === 144 && velocity === 0)) {
instrument1.triggerRelease(noteName);
instrument2.triggerRelease(noteName);
instrument3.triggerRelease(noteName);
instrument4.triggerRelease(noteName);
}
}
function getNoteName(noteNumber) {
const notes = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
const octave = Math.floor(noteNumber / 12) - 1;
return `${notes[noteNumber % 12]}${octave}`;
}
function recordNoteData(noteObject) {
if (isAuditionMode) {
return;
}
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
// ▼▼▼ Math.round() を削除 ▼▼▼
const noteLength_16th = Tone.Time(noteObject.length).toTicks() / Tone.Time("16n").toTicks();
const start_16th = playbackCursor_16th;
targetPianoRoll.push({
start_16th: start_16th,
scale: noteObject.scale,
length_16th: noteLength_16th
});
// カーソルを進める際も、整数に丸めずに加算する
playbackCursor_16th += noteLength_16th;
Tone.Transport.seconds = playbackCursor_16th * Tone.Time("16n").toSeconds();
targetPianoRoll.sort((a, b) => a.start_16th - b.start_16th);
redrawAll();
updatePianoRollTextBox();
}
function getNormalizedSelectionRect() {
const x = Math.min(selectionRect.startX, selectionRect.currentX);
const y = Math.min(selectionRect.startY, selectionRect.currentY);
const w = Math.abs(selectionRect.startX - selectionRect.currentX);
const h = Math.abs(selectionRect.startY - selectionRect.currentY);
return { x, y, w, h };
}
/**
* 範囲選択矩形内のノートを計算し、selectedNotes配列を更新する
*/
function updateSelection() {
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
const selRect = getNormalizedSelectionRect();
selectedNotes = [];
targetPianoRoll.forEach(note => {
if (note.scale === 'rest') return;
const noteX = pitchHeaderWidth + (note.start_16th / 2) * cellWidth;
const noteY = noteScales.indexOf(note.scale) * cellHeight;
const noteW = (note.length_16th / 2) * cellWidth;
const noteH = cellHeight;
// AABB交差判定
if (noteX < selRect.x + selRect.w && noteX + noteW > selRect.x &&
noteY < selRect.y + selRect.h && noteY + noteH > selRect.y) {
selectedNotes.push(note);
}
});
}
const drawKeyboard = () => {
const musicalScaleArray=["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"];const keyboardDiv=document.getElementById("keyboard");let baseKey;for(let i=0;i<25;i++){const key=document.createElement("button");key.id=`key_${musicalScaleArray[i%12]}${Math.floor(i/12)+3}`;key.onmousedown=(e)=>{const scale=e.target.id.split("_")[1];const octaveAdjustedScale=adjustOctave(scale);activeKeyboardNote=octaveAdjustedScale;const instrument=eval(`instrument${currentTrack.slice(-1)}`);instrument.triggerAttack(octaveAdjustedScale);recordNoteData({scale:octaveAdjustedScale,length:getCurrentNoteLength()})};key.onmouseup=stop;key.onmouseleave=stop;if(key.id.includes("#")){key.classList.add("black")}else{key.classList.add("white");baseKey=document.createElement("div")}baseKey.appendChild(key);keyboardDiv.appendChild(baseKey)}};
const adjustOctave = (scale) => {
const note = scale.slice(0, -1);
const octave = parseInt(scale.slice(-1));
return `${note}${octave + currentOctave - 4}`;
};
const stop = () => {
if (activeKeyboardNote) {
const instrument = eval(`instrument${currentTrack.slice(-1)}`);
instrument.triggerRelease(activeKeyboardNote);
activeKeyboardNote = null;
}
};
// ==================================================================
// ========== 再生エンジン ==========
// ==================================================================
async function playMusic() {
await Tone.start();
Tone.Transport.bpm.value = document.getElementById("tempo").value;
if (Tone.Transport.state !== 'started') {
if (Tone.Transport.state !== 'paused') {
await Tone.loaded();
const totalDuration = numColumns * Tone.Time("8n").toSeconds();
if (totalDuration === 0) return;
Tone.Transport.loop = true;
Tone.Transport.loopStart = 0;
Tone.Transport.loopEnd = totalDuration;
setupPlayback();
}
Tone.Transport.start();
startDrawingLoop();
}
}
function pauseMusic() {
Tone.Transport.pause();
if (animationFrameId) {
cancelAnimationFrame(animationFrameId);
}
}
function stopMusic() {
Tone.Transport.stop();
playbackCursor_16th = 0;
if (animationFrameId) {
cancelAnimationFrame(animationFrameId);
}
redrawAll();
}
function setupPlayback() {
if (part1) part1.dispose(); if (part2) part2.dispose();
if (part3) part3.dispose(); if (part4) part4.dispose();
Tone.Transport.cancel(0);
const createPart = (pianoRoll, instrument) => {
const partData = convertToPartData(pianoRoll);
return new Tone.Part((time, value) => {
instrument.triggerAttackRelease(value.note, value.duration, time);
}, partData).start(0);
};
part1 = createPart(pianoRoll1, instrument1);
part2 = createPart(pianoRoll2, instrument2);
part3 = createPart(pianoRoll3, instrument3);
part4 = createPart(pianoRoll4, instrument4);
}
function startDrawingLoop() {
if (animationFrameId) {
cancelAnimationFrame(animationFrameId);
}
function loop() {
if (Tone.Transport.state !== 'started') {
animationFrameId = null;
return;
}
const sixteenthSecs = Tone.Time("16n").toSeconds();
playbackCursor_16th = Tone.Transport.seconds / sixteenthSecs;
redrawAll();
animationFrameId = requestAnimationFrame(loop);
}
animationFrameId = requestAnimationFrame(loop);
}
function resetMusic() {
stopMusic();
pianoRoll1 = []; pianoRoll2 = [];
pianoRoll3 = []; pianoRoll4 = [];
redrawAll();
updatePianoRollTextBox();
document.getElementById("pianoRoll").value = "";
document.getElementById("data-display-container").classList.add("hidden");
}
// ==================================================================
// ========== ユーティリティ & 残りのUI操作 ==========
// ==================================================================
function convertToPartData(pianoRoll) {
const sixteenthSecs = Tone.Time("16n").toSeconds();
return pianoRoll.map(note => {
if (note.scale === 'rest') return null;
return {
time: note.start_16th * sixteenthSecs,
note: note.scale,
duration: note.length_16th * sixteenthSecs
};
}).filter(Boolean);
}
function updatePianoRollTextBox() {
const targetPianoRoll = eval(`pianoRoll${currentTrack.slice(-1)}`);
document.getElementById("pianoRoll").value = targetPianoRoll.map(n =>
`start:${n.start_16th} scale:${n.scale} len:${n.length_16th}`
).join('\n');
}
function editNote() {
const textData = document.getElementById("pianoRoll").value.trim();
const newPianoRoll = textData.split("\n").map(line => {
try {
const startMatch = line.match(/start:(\d+)/);
const scaleMatch = line.match(/scale:(\S+)/);
const lenMatch = line.match(/len:(\d+)/);
if (startMatch && scaleMatch && lenMatch) {
return {
start_16th: parseInt(startMatch[1]),
scale: scaleMatch[1],
length_16th: parseInt(lenMatch[1])
};
} return null;
} catch (e) { return null; }
}).filter(Boolean);
if (textData === "") {
eval(`pianoRoll${currentTrack.slice(-1)} = []`);
} else {
eval(`pianoRoll${currentTrack.slice(-1)} = newPianoRoll`);
}
redrawAll();
}
function toggleDataDisplay() {
const container = document.getElementById("data-display-container");
container.classList.toggle("hidden");
if (!container.classList.contains("hidden")) {
updatePianoRollTextBox();
}
}
const toggleKeyboard = () => document.getElementById("keyboard").classList.toggle("hidden");
const increaseOctave = () => { if (currentOctave < 7) document.getElementById("currentOctave").textContent = ++currentOctave };
const decreaseOctave = () => { if (currentOctave > 1) document.getElementById("currentOctave").textContent = --currentOctave };
