r/matrix

by noromanba 2017-01-31 [2017/01/31 07:21:20]
(Forked from matrix by yuta25)

Neo's-eyes simulator

@@ -3,6 +3,7 @@
  * @description Neo's-eyes simulator
  * @include http://*
  * @include https://*
+ * @contributor http://timelessname.com/sandbox/matrix.html
  * @contributor jargonjustin  https://www.reddit.com/r/programming/comments/1ag0c3/
  * @contributor NonNonHeinous, OptionalField, echeese and maschnitz
  * @contributor yuta25        http://let.hatelabo.jp/yuta25/let/hJmeu-js5vps (Fork of)
@@ -11,8 +12,14 @@
  */
 
 // remember '00s web
-// c.f.
-// https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/
+// Matrix digital rain c.f.
+// https://www.google.com/search?q=matrix+rain+javascript
+// https://en.wikipedia.org/wiki/Matrix_digital_rain
+//
+// purhaps parent code c.f.
+// http://timelessname.com/sandbox/matrix.html
+//  https://news.ycombinator.com/item?id=5388444
+//  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/
 (() => {
   'use strict';
 
@@ -35,9 +42,9 @@
     ctx.fillRect(0, 0, canvas.width, canvas.height);
     ctx.fillStyle = 'rgba(0, 255, 0, 1)';
     // opacity range: 0-1
-    // Trigonometry and Radian based algorithm
+    // Unit Circle and Radian based cyclic algorithm, like a ^^^^^^^^
     canvas.style.opacity = Math.abs(Math.cos(degree * Math.PI / 180));
-    degree += 10;
+    degree = (degree % 360) + 10;
 
     texts = texts.map((val, idx) => {
       const rand = Math.random();
@@ -51,14 +58,17 @@
 
 // # License/Fork Tree
 //
-// ## origin on /r/programming
+// unknown origin, below?
+// http://timelessname.com/sandbox/matrix.html
+//
+// ## on /r/programming
 //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/
 //
-// ## original code by /u/jargonjustin
+// ## posted by /u/jargonjustin
 // Unknown (as-is)
 //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/c8x2fjx/
 //
-// ## merged by NonNonHeinous
+// ## merged by /u/NonNonHeinous
 // Unknown (as-is)
 // /u/jargonjustin, /u/OptionalField, /u/echeese, and /u/maschnitz (and/or more redditors?)
 //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/c8x3vov/

• /*
   * @title /r/matrix
   * @description Neo's-eyes simulator
   * @include http://*
   * @include https://*
   * @contributor http://timelessname.com/sandbox/matrix.html
   * @contributor jargonjustin  https://www.reddit.com/r/programming/comments/1ag0c3/
   * @contributor NonNonHeinous, OptionalField, echeese and maschnitz
   * @contributor yuta25        http://let.hatelabo.jp/yuta25/let/hJmeu-js5vps (Fork of)
   * @license TBD (as-is); see the bottom
   * @javascript_url
   */
  
  // remember '00s web
  // Matrix digital rain c.f.
  // https://www.google.com/search?q=matrix+rain+javascript
  // https://en.wikipedia.org/wiki/Matrix_digital_rain
  //
  // purhaps parent code c.f.
  // http://timelessname.com/sandbox/matrix.html
  //  https://news.ycombinator.com/item?id=5388444
  //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/
  (() => {
    'use strict';
  
    const canvas = document.createElement('canvas');
    canvas.width = window.screen.width;
    canvas.height = document.body.scrollHeight;
  
    //canvas.style.height = `${document.body.scrollHeight}px`;
    canvas.style.position = 'absolute';
    canvas.style.top = canvas.style.left = '0';
    canvas.style.zIndex = Number.MAX_SAFE_INTEGER || Number.MAX_VALUE;
  
    document.body.appendChild(canvas);
  
    const ctx = canvas.getContext('2d');
    let degree = 0;
    let texts = Array(256).fill(1);
    setInterval(() => {
      ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      ctx.fillStyle = 'rgba(0, 255, 0, 1)';
      // opacity range: 0-1
      // Unit Circle and Radian based cyclic algorithm, like a ^^^^^^^^
      canvas.style.opacity = Math.abs(Math.cos(degree * Math.PI / 180));
      degree = (degree % 360) + 10;
  
      texts = texts.map((val, idx) => {
        const rand = Math.random();
        // XXX too much Magic Numbers
        ctx.fillText(String.fromCharCode(Math.floor(2720 + rand * 33)), idx * 10, val);
        val += 10;
        return val > 768 + rand * 1e4 ? 0 : val;
      });
    }, 33);
  })();
  
  // # License/Fork Tree
  //
  // unknown origin, below?
  // http://timelessname.com/sandbox/matrix.html
  //
  // ## on /r/programming
  //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/
  //
  // ## posted by /u/jargonjustin
  // Unknown (as-is)
  //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/c8x2fjx/
  //
  // ## merged by /u/NonNonHeinous
  // Unknown (as-is)
  // /u/jargonjustin, /u/OptionalField, /u/echeese, and /u/maschnitz (and/or more redditors?)
  //  https://www.reddit.com/r/programming/comments/1ag0c3/someone_posted_an_htmljavascript_implementation/c8x3vov/
  //
  // ## just a collect by MinhasKamal from merged code
  // Unknown (as-is)
  //  https://github.com/MinhasKamal/CreepyCodeCollection/blob/master/README.md
  //    https://github.com/MinhasKamal/CreepyCodeCollection/blob/master/matrix_effect.html
  //
  // ## pure js port and mod by yuta25
  // MIT License  https://opensource.org/licenses/MIT
  //  http://let.hatelabo.jp/yuta25/let/hJmeu-js5vps
  //
  // ## re-mod by noromanba the Genin translator
  // WTFPL (Do What the Fuck You Want to Public License)
  //  http://www.wtfpl.net/about/
  //  http://www.wtfpl.net/txt/copying/
  // http://let.hatelabo.jp/noromanba/let/hJmevPLog7ty
  
  

• Permalink RAW Packed Userscript LOADER Metadata ?

  Permalink

  このページへの個別リンクです。

  RAW

  書かれたコードへの直接のリンクです。

  Packed

  文字列が圧縮された書かれたコードへのリンクです。

  Userscript

  Greasemonkey 等で利用する場合の .user.js へのリンクです。

  Loader

  @require やソースコードが長い場合に多段ロードする Loader コミのコードへのリンクです。

  Metadata

  コード中にコメントで @xxx と書かれたメタデータの JSON です。