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P5.js 日本語リファレンス(red)

Last updated at Posted at 2020-04-30

このページでは[「P5.js 日本語リファレンス」] (https://qiita.com/bit0101/items/91818244dc26c767a0fe) の red関数を説明します。

red()

説明文

指定した色から赤の値を取得します。

構文

red(color)

パラメタ

  • color
    p5.Color | Number[ ] | String:p5.Colorオブジェクト、カラーコンポーネント、CSSカラー

戻り値

Number:赤の値

function draw() {
  let c = color('#FFFF00'); // CSSカラーで黄色を設定
  fill(c);
  rect(15, 20, 35, 60); //左の長方形を描画する

  let redValue = red(c); // 赤色を取得する
  fill(redValue, 0, 0);
  rect(50, 20, 35, 60); // 右の長方形を描画する
}

実行結果

red.JPG

著作権

p5.js was created by Lauren McCarthy and is developed by a community of collaborators, with support from the Processing Foundation and NYU ITP. Identity and graphic design by Jerel Johnson.

ライセンス

Creative Commons(CC BY-NC-SA 4.0) に従います。

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