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HTML

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML
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CSS
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JS 

              
                const setting = {
  cricleNum: 20, // オブジェクトの総数
  cx: 0, // 中心点xの座標位置
  cy: 0, // 中心点yの座標位置
  h: 100, // 円の半径
  angle: 0.01 // 円全体の角度
};

// dat.GUI を使うための準備
const gui = new dat.GUI();
gui.add(setting, 'angle', 0, 1);
gui.add(setting, 'h', 0, window.innerHeight);
gui.add(setting, 'CirclesNum', 1, 40).step(1);
gui.add(setting, 'cx', 0, window.innerWidth).listen();
gui.add(setting, 'cy', 0, window.innerHeight).listen();

// 最初に実行される処理
function setup() {
  createCanvas(windowWidth, windowHeight); // ウィンドウのサイズでキャンバスを作る
  setting.cx = width / 2; // x軸の中心座標を求めて setting.cx に代入する
  setting.cy = height / 2; // y軸の中心座標を求め
}

// 毎フレームごとに実行される処理
function draw() {
  clear(); // 前のフレームで描画されているものをクリアする
  background('rgba(76,141,161,1)'); // 背景を塗りつぶす
  noStroke(); // 線を描画しない
  fill("rgb(254,240,195)"); // 塗りつぶしの色指定

  [...new Array(setting.cricleNum)].forEach((_, i) => {
    const _rad = i / setting.cricleNum * PI * 2 + setting.angle; //  現在の円のインデックス / 円の総数 * 2π + 円全体の角度
    const x = setting.h * cos(_rad) + setting.cx; // x座標を求める
    const y = setting.h * sin(_rad) + setting.cy; // y座標を求める
    ellipse(x, y, 10, 10); // 円を描画する
  })
}
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