VexFlow 打楽器譜

VexFlow 使い方に戻る。

概要

　ここでは一本線に打楽器譜を記載するものと、ドラムセット譜でよく使われる変則的な符頭の表示について考えたいと思います。

　

打楽器譜

　コードは以下のとおりです。

<div id="yonet202403Mid_Output01"></div>
<script>
///////////////////////
(function(){
class Position {
  constructor(x, y) {
    this.x = x;
    this.y = y;
  }
}
var VF = Vex.Flow;
const Instrument1 = new Position(0, 0);
const Instrument2 = new Position(0, 0);
const Stave2Pos = new Position(0, 0);
const Stave3Pos = new Position(0, 0);
const Stave6Pos = new Position(0, 0);
const Stave10Pos = new Position(0, 0);
const Stave11Pos = new Position(0, 0);
(function(){
const {
  Factory,
  Stave,
  StaveNote,
  Formatter,
  Voice,
  StaveTie,
  BarLine,
  Beam,
  Dot,
  StaveConnector,
  Modifier,
  RenderContext,
  TextDynamics,
  Articulation,
  TextNote,
  Crescendo,
  Renderer
} = Vex.Flow;

let nscale = 0.64;
let nwidth = 1040;
let nheight = 720;

let nHeadMargin = 70;
let nStaveWidth = 350;

const f = new Factory({ 
  renderer: { elementId: 'yonet202403Mid_Output01', width: nwidth, height: nheight * nscale }
  });
const ctx = f.getContext();
ctx.scale(nscale, nscale);

const defaultStyle = {
  lineWidth: ctx.lineWidth,
  strokeStyle: ctx.strokeStyle,
};

for (let i = 0; i <= nwidth * (1 / nscale); i += 10) {
  ctx.beginPath();
  ctx.moveTo(0 + i, 0);
  ctx.lineTo(0 + i, nheight);
  if (i % 100 === 0){
    ctx.setLineWidth(1);
    ctx.setStrokeStyle('rgba(200, 200, 200, 0.8)');
  }
  else{
    ctx.setLineWidth(0.5);
    ctx.setStrokeStyle('rgba(230, 230, 230, 0.8)');
  }
  ctx.stroke();
}

for (let i = 0; i <= nheight; i += 10) {
  ctx.beginPath();
  ctx.moveTo(0, i);
  ctx.lineTo(nwidth * (1 / nscale), i);
  if (i % 100 === 0){
    ctx.setLineWidth(1);
    ctx.setStrokeStyle('rgba(200, 200, 200, 0.8)');
  }
  else{
    ctx.setLineWidth(0.5);
    ctx.setStrokeStyle('rgba(230, 230, 230, 0.8)');
  }
  ctx.stroke();
}

ctx.lineWidth = defaultStyle.lineWidth;
ctx.strokeStyle = defaultStyle.strokeStyle;

const stave1 = new Stave(80, 150, nHeadMargin + nStaveWidth).setContext(ctx);
stave1.setClef("treble").setContext(ctx);
stave1.setTimeSignature('4/4').setContext(ctx);
stave1.setMeasure(1);
stave1.draw();

Instrument1.x = stave1.x - 30;
Instrument1.y = stave1.y + 90; 

const notes1 = [
  new StaveNote({ keys: ["c/4"], duration: "4" }),
  new StaveNote({ keys: ["d/4"], duration: "4" }),
  new StaveNote({ keys: ["e/4"], duration: "4" }),
  new StaveNote({ keys: ["f/4"], duration: "4" })
];

var stave1Voice = new Vex.Flow.Voice({ num_beats: 4, beat_value: 4 });
stave1Voice.setStrict(false);
stave1Voice.addTickables(notes1);

var formatter1 = new Vex.Flow.Formatter().joinVoices([stave1Voice]);
formatter1.formatToStave([stave1Voice], stave1);
stave1Voice.draw(ctx, stave1);

const stave2 = f.Stave({ x: stave1.width + stave1.x, y: stave1.y, width: nStaveWidth });
stave2.setMeasure(2);
stave2.setContext(ctx).draw();

Stave2Pos.x = stave2.x;
Stave2Pos.y = stave2.y;
//f.draw();

const stave3 = new Stave(stave2.width + stave2.x, stave1.y, nStaveWidth).setContext(ctx);
stave3.setMeasure(3);
stave3.draw();

Stave3Pos.x = stave3.x;
Stave3Pos.y = stave3.y;

const stave4 = new Stave(stave3.width + stave3.x, stave1.y, nStaveWidth).setContext(ctx);
stave4.setMeasure(4);
stave4.draw();

const stave5 = new Stave(stave1.x, stave1.y + 200, nHeadMargin + nStaveWidth).setContext(ctx);
stave5.addClef("treble").setContext(ctx);
stave5.addTimeSignature('4/4').setContext(ctx);
stave5.setMeasure(5);
stave5.draw();

var connector = new VF.StaveConnector(stave1, stave5);
connector.setType(VF.StaveConnector.type.SINGLE);
connector.setContext(ctx);
connector.draw();

function dotted(staveNote, noteIndex = -1) {
  if (noteIndex < 0) {
    Dot.buildAndAttach([staveNote], {
      all: true
    });
  } 
  else {
    for(noteIndexValue of noteIndex){
      Dot.buildAndAttach([staveNote], {
        index: noteIndexValue
      });
    }
  }
  return staveNote;
}

const stave6 = new Stave(stave5.width + stave5.x, stave5.y, nStaveWidth).setContext(ctx);
stave6.setMeasure(6);
stave6.draw();

Stave6Pos.x = stave6.x;
Stave6Pos.y = stave6.y;

const stave7 = new Stave(stave6.width + stave6.x, stave5.y, nStaveWidth).setContext(ctx);
stave7.setMeasure(7);
stave7.draw();

const stave8 = new Stave(stave7.width + stave7.x, stave5.y, nStaveWidth).setContext(ctx);
stave8.setMeasure(8);
stave8.draw();

const stave9 = new Stave(stave5.x, stave5.y + 200, nHeadMargin + nStaveWidth).setContext(ctx);
stave9.setMeasure(9);
stave9.draw();

var connector9 = new VF.StaveConnector(stave5, stave9);
connector9.setType(VF.StaveConnector.type.SINGLE);
connector9.setContext(ctx);
connector9.draw();

var connector9_2 = new VF.StaveConnector(stave5, stave9);
connector9_2.setType(VF.StaveConnector.type.BRACKET);
connector9_2.setContext(ctx);
connector9_2.draw();

Instrument2.x = stave1.x - 30;
Instrument2.y = stave5.y + ((stave9.y - stave5.y) / 2) + 90; 

const stave10 = new Stave(stave9.width + stave9.x, stave9.y, nStaveWidth).setContext(ctx);
stave10.setMeasure(10);
stave10.draw();

Stave10Pos.x = stave10.x;
Stave10Pos.y = stave10.y;

const stave11 = new Stave(stave10.width + stave10.x, stave9.y, nStaveWidth).setContext(ctx);
stave11.setMeasure(11);
stave11.draw();

Stave11Pos.x = stave11.x;
Stave11Pos.y = stave11.y;

const stave12 = new Stave(stave11.width + stave11.x, stave9.y, nStaveWidth).setContext(ctx);
stave12.setMeasure(12);
stave12.draw();

})();

const svgElement2 = document.querySelector('#yonet202403Mid_Output01 svg');
svgElement2.style.backgroundColor = '#F5F5F5';
var svgContainer = document.getElementById('yonet202403Mid_Output01');
var svgElement = svgContainer.querySelector('svg');

var newText = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText.setAttribute('x', '100');
newText.setAttribute('y', '100');
newText.setAttribute('font-family', 'Hiragino Kaku Gothic Pro, メイリオ, MS Gothic, sans-serif');
newText.setAttribute('font-size', '50');
newText.setAttribute('fill', 'black');
newText.textContent = 'TestTitle - subTitle - lyrics: yo-net, music: yo-net';
svgElement.appendChild(newText);

var newText2 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText2.setAttribute('x', Instrument1.x);
newText2.setAttribute('y', Instrument1.y);
newText2.setAttribute('font-family', 'Bravura, VexFlow, Arial, sans-serif');
newText2.setAttribute('font-size', '20pt');
newText2.setAttribute('fill', 'black');
newText2.textContent = 'Vocal';
var textGroup2 = document.createElementNS('http://www.w3.org/2000/svg', 'g');
textGroup2.setAttribute('transform', 'rotate(-90 ' + Instrument1.x + ' ' + Instrument1.y + ')');
textGroup2.appendChild(newText2);
svgElement.appendChild(textGroup2);

var newText3 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText3.setAttribute('x', Instrument2.x);
newText3.setAttribute('y', Instrument2.y);
newText3.setAttribute('font-family', 'Bravura, VexFlow, Arial, sans-serif');
newText3.setAttribute('font-size', '20pt');
newText3.setAttribute('fill', 'black');
newText3.textContent = 'E.Guitar';
var textGroup3 = document.createElementNS('http://www.w3.org/2000/svg', 'g');
textGroup3.setAttribute('transform', 'rotate(-90 ' + Instrument2.x + ' ' + Instrument2.y + ')');
textGroup3.appendChild(newText3);
svgElement.appendChild(textGroup3);

//設定
var fontSize2 = 40; // フォントサイズ
var fontFamily2 = "Bravura, Arial"; // Bravuraフォントファミリー
var textContent2 = "\uE500";// 符頭E0A4

// テキスト要素の作成
var newText2 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText2.setAttribute('id', 'rest2'); // テキスト要素にIDを付ける
newText2.setAttribute('x', 0);
newText2.setAttribute('y', 0);
newText2.setAttribute('font-family', fontFamily2);
newText2.setAttribute('font-size', fontSize2);
newText2.setAttribute('fill', 'black');
newText2.textContent = textContent2;

//SVG要素にテキストを追加
svgElement.appendChild(newText2);

(function(){
    var textWidth = document.getElementById('rest2').getBBox().width;
    var textHeight = document.getElementById('rest2').getBBox().height;

    // クレシェンドの幅に応じて縦方向のスケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave2Pos.x + 170;
    var StavePos_y = Stave2Pos.y + 60;

    newText2.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    //SVG要素に追加する
    svgElement.appendChild(newText2);
})();


//フォント設定
var fontSize3 = 40; // フォントサイズ
var fontFamily3 = "Bravura, Arial"; // Bravuraフォントファミリー
var textContent3 = "\uE501";// 符頭E0A4

// テキスト要素の作成
var newText3 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText3.setAttribute('id', 'rest3'); // テキスト要素にIDを付ける
newText3.setAttribute('x', 0);
newText3.setAttribute('y', 0);
newText3.setAttribute('font-family', fontFamily3);
newText3.setAttribute('font-size', fontSize3);
newText3.setAttribute('fill', 'black');
newText3.textContent = textContent3;

//SVG要素にテキストを追加
svgElement.appendChild(newText3);

(function(){
    var textWidth = document.getElementById('rest3').getBBox().width;
    var textHeight = document.getElementById('rest3').getBBox().height;

    //スケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave3Pos.x + 335;
    var StavePos_y = Stave3Pos.y + 60;

    newText3.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    //SVG要素に追加する
    svgElement.appendChild(newText3);
})();

//設定
var fontSize6 = 40; // フォントサイズ
var fontFamily6 = "Bravura, Arial";// Bravuraフォントファミリー
var textContent6 = "\uE502";// 符頭E0A4

// テキスト要素の作成
var newText6 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText6.setAttribute('id', 'rest6'); //テキスト要素にIDを付ける
newText6.setAttribute('x', 0);
newText6.setAttribute('y', 0);
newText6.setAttribute('font-family', fontFamily6);
newText6.setAttribute('font-size', fontSize6);
newText6.setAttribute('fill', 'black');
newText6.textContent = textContent6;

// SVG要素にテキストを追加
svgElement.appendChild(newText6);

(function(){
    var textWidth = document.getElementById('rest6').getBBox().width;
    var textHeight = document.getElementById('rest6').getBBox().height;

    //スケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave6Pos.x + 325;
    var StavePos_y = Stave6Pos.y + 60;

    newText6.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    //SVG要素に追加する
    svgElement.appendChild(newText6);
})();

//設定
var fontSize10 = 40; // フォントサイズ
var fontFamily10 = "Bravura, Arial"; // Bravuraフォントファミリー
var textContent10 = "\uE503\uE504\uE504\uE504\uE504\uE505";//複数小節休符 // 符頭E0A4

// テキスト要素の作成
var newText10 = document.createElementNS('http://www.w3.org/2000/svg', 'text');
newText10.setAttribute('id', 'rest10'); // テキスト要素にIDを付ける
newText10.setAttribute('x', 0);
newText10.setAttribute('y', 0);
newText10.setAttribute('font-family', fontFamily10);
newText10.setAttribute('font-size', fontSize10);
newText10.setAttribute('fill', 'black');
newText10.textContent = textContent10;

// SVG要素にテキストを追加
svgElement.appendChild(newText10);

(function(){
    var textWidth = document.getElementById('rest10').getBBox().width;
    var textHeight = document.getElementById('rest10').getBBox().height;

    //スケーリング
    var horizontalScale = 1;
    var verticalScale = 1;

    var StavePos_x = Stave10Pos.x + 325;
    var StavePos_y = Stave10Pos.y + 60;

    newText10.setAttribute('transform', 'translate(' + StavePos_x  + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');

    //SVG要素に追加する
    svgElement.appendChild(newText10);
})();

function insertTextToSVG(options) {

    var textContent = options.textContent;
    var strID = options.strID;
    var Stave_x = options.Stave_x;
    var Stave_y = options.Stave_y;
    var Stave_x_Offset = options.Stave_x_Offset || 0;
    var Stave_y_Offset = options.Stave_y_Offset || 0;
    var StaveWidth = options.StaveWidth || 0;
    var StaveHeight = options.StaveHeight || 0;
    var StaveVerticalScale = options.StaveVerticalScale || 0;
    var fontSize = options.fontSize || 40;
    var fontFamily = options.fontFamily || "Bravura, Arial";
    var shift_x = options.shift_x || [0];
    var offset_sum = 0;
    shift_x.forEach(function(offset, index) {
        offset_sum = offset_sum + offset;
        var newText = document.createElementNS('http://www.w3.org/2000/svg', 'text');
        newText.setAttribute('id', strID + '_' + index); // テキスト要素にIDを付ける
        newText.setAttribute('x', 0);
        newText.setAttribute('y', 0);
        newText.setAttribute('font-family', fontFamily);
        newText.setAttribute('font-size', fontSize);
        newText.setAttribute('fill', 'black');
        if (Array.isArray(textContent)) {
          newText.textContent = textContent[index];
        }
        else{
          newText.textContent = textContent;
        }

        (function() {
            var textWidth = newText.getBBox().width;
            var textHeight = newText.getBBox().height;
            var horizontalScale;
            if (typeof StaveWidth === 'undefined' || StaveWidth == 0) {
                horizontalScale = 1;
            } else {
                horizontalScale = StaveWidth / textWidth;
            }
            var verticalScale;
            if (typeof StaveHeight === 'undefined' || StaveHeight == 0) {
                verticalScale = 1;
            } else if (StaveVerticalScale != 0) {
                verticalScale = StaveVerticalScale;
            } else {
                verticalScale = StaveHeight / textHeight;
            }
            var StavePos_x = Stave_x + Stave_x_Offset + offset_sum;
            var StavePos_y = Stave_y + Stave_y_Offset;

            newText.setAttribute('transform', 'translate(' + StavePos_x + ',' + StavePos_y + ') scale(' + horizontalScale + ',' + verticalScale + ')');
        })();

        svgElement.appendChild(newText);
    });
}

var options = {
    textContent: ["\uE503", "\uE504", "\uE504", "\uE504", "\uE504", "\uE504", "\uE504", "\uE504", "\uE504", "\uE505"], // 必須文字列
    strID: "rest11", // 必須
    Stave_x: Stave11Pos.x,
    Stave_y: Stave11Pos.y,
    Stave_x_Offset: 305, // オプション、デフォルトは0
    Stave_y_Offset: 60, // オプション、デフォルトは0
    StaveWidth: 0, // オプション、デフォルトは0
    StaveHeight: 0, // オプション、デフォルトは0
    StaveVerticalScale: 0, // オプション、デフォルトは0
    fontSize: 40, // オプション、デフォルトは40
    fontFamily: "Bravura, Arial", // オプション、デフォルトは"Bravura, Arial"
    shift_x: [0, 0, 10, 10, 10, 10, 10, 10, 10, 15] // xのオフセット値配列
};

insertTextToSVG(options);

})();
</script>

　VexFlowの技術とは関係のない記事になってしまいましたが、またひとつ奥の手の使い方を示せましたね。

　やってること自体は前の記事の複数小節休符と同じですので、説明はあまりしません。最後のところで、奥の手の手法を関数化したところが違うくらいです。

　

VexFlow 使い方に戻る。