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AboutAll PostsWarningRandom

Many WebGL Constants

  1. console.log(
  2.   Object.getOwnPropertyNames(WebGLRenderingContext)
  3. )
// tricks // webgl

1×1 Transparent Image DataUri Gif

  1. data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==

Have used this one in the past – super useful – guessing I got it from here but not totally sure…

If I ever get around to making the updated version of QuickShader available – it’s used in there…

EDIT:

  1. // ¯\_(:P)_/¯
  2. Object.assign(document.createElement`canvas`,{width:1,height:1}).toDataURL()
  3.  
  4. //// ... 
  5. document.body.innerHTML=`<canvas id=x>`;x.width=x.height=1;x.toDataURL()
// graphics // humor // tricks

Raphaël Easing Equations How To

  1. const { pow, PI } = Math;
  2.  
  3. // mostly unedited code from Raphaël
  4. var ef = {
  5.   linear: function(n) {
  6.     return n;
  7.   },
  8.   '<': function(n) {
  9.     return pow(n, 1.7);
  10.   },
  11.   '>': function(n) {
  12.     return pow(n, 0.48);
  13.   },
  14.   '<>': function(n) {
  15.     var q = 0.48 - n / 1.04,
  16.       Q = Math.sqrt(0.1734 + q * q),
  17.       x = Q - q,
  18.       X = pow(abs(x), 1 / 3) * (x < 0 ? -1 : 1),
  19.       y = -Q - q,
  20.       Y = pow(abs(y), 1 / 3) * (y < 0 ? -1 : 1),
  21.       t = X + Y + 0.5;
  22.     return (1 - t) * 3 * t * t + t * t * t;
  23.   },
  24.   backIn: function(n) {
  25.     var s = 1.70158;
  26.     return n * n * ((s + 1) * n - s);
  27.   },
  28.   backOut: function(n) {
  29.     n = n - 1;
  30.     var s = 1.70158;
  31.     return n * n * ((s + 1) * n + s) + 1;
  32.   },
  33.   elastic: function(n) {
  34.     if (n == !!n) {
  35.       return n;
  36.     }
  37.     return pow(2, -10 * n) * Math.sin(((n - 0.075) * (2 * PI)) / 0.3) + 1;
  38.   },
  39.   bounce: function(n) {
  40.     var s = 7.5625,
  41.       p = 2.75,
  42.       l;
  43.     if (n < 1 / p) {
  44.       l = s * n * n;
  45.     } else {
  46.       if (n < 2 / p) {
  47.         n -= 1.5 / p;
  48.         l = s * n * n + 0.75;
  49.       } else {
  50.         if (n < 2.5 / p) {
  51.           n -= 2.25 / p;
  52.           l = s * n * n + 0.9375;
  53.         } else {
  54.           n -= 2.625 / p;
  55.           l = s * n * n + 0.984375;
  56.         }
  57.       }
  58.     }
  59.     return l;
  60.   }
  61. };
  62. ef.easeIn = ef['ease-in'] = ef['<'];
  63. ef.easeOut = ef['ease-out'] = ef['>'];
  64. ef.easeInOut = ef['ease-in-out'] = ef['<>'];
  65. ef['back-in'] = ef.backIn;
  66. ef['back-out'] = ef.backOut;
  67.  
  68. // create a dot
  69. function dot(x, y, radius, color) {
  70.   const el = document.createElement('div');
  71.   const size = `${radius * 2}px`;
  72.   Object.assign(el.style, {
  73.     position: 'absolute',
  74.     left: `${x}px`,
  75.     top: `${y}px`,
  76.     width: size,
  77.     height: size,
  78.     transform: `translate(${-radius}px, ${-radius}px)`,
  79.     borderRadius: '50%',
  80.     background: color
  81.   });
  82.   el.classList.add('dot');
  83.   document.body.appendChild(el);
  84.   return el;
  85. }
  86.  
  87. const elA = dot(0, 40, 30, 'red');
  88. const elB = dot(0, 110, 30, 'blue');
  89. const elC = dot(0, 160, 20, 'green');
  90.  
  91. // how to use the easing equations:
  92. let t = 0;
  93.  
  94. let start = Date.now();
  95. let time = 0;
  96. let duration = 2; // 2 seconds
  97. function loop() {
  98.   // frame based
  99.   elA.style.left = `${ef.elastic(t) * 50}%`;
  100.   t += 0.005;
  101.  
  102.   // time based
  103.   if (time <= duration) {
  104.     time = (Date.now() - start) / 1000;
  105.     const param = time / duration;
  106.     elB.style.left = `${ef.elastic(param) * 50}%`;
  107.  
  108.     // green bounce example
  109.     elC.style.left = `${ef.bounce(param) * 50}%`;
  110.   }
  111.  
  112.   requestAnimationFrame(loop);
  113. }
  114. loop();

I realized it might not be obvious how to use Raphaël’s easing equations. So I speed coded this example.

If you’d like to learn more about this kind of thing gsap is a great place to start… it is amazing… I highly recommend browsing the source.

// animation // javascript // oldschool // speed-coded // tricks

Raphaël Easing Equations

  1. var ef = R.easing_formulas = {
  2.     linear: function (n) {
  3.         return n;
  4.     },
  5.     "<": function (n) {
  6.         return pow(n, 1.7);
  7.     },
  8.     ">": function (n) {
  9.         return pow(n, .48);
  10.     },
  11.     "<>": function (n) {
  12.         var q = .48 - n / 1.04,
  13.             Q = math.sqrt(.1734 + q * q),
  14.             x = Q - q,
  15.             X = pow(abs(x), 1 / 3) * (x < 0 ? -1 : 1),
  16.             y = -Q - q,
  17.             Y = pow(abs(y), 1 / 3) * (y < 0 ? -1 : 1),
  18.             t = X + Y + .5;
  19.         return (1 - t) * 3 * t * t + t * t * t;
  20.     },
  21.     backIn: function (n) {
  22.         var s = 1.70158;
  23.         return n * n * ((s + 1) * n - s);
  24.     },
  25.     backOut: function (n) {
  26.         n = n - 1;
  27.         var s = 1.70158;
  28.         return n * n * ((s + 1) * n + s) + 1;
  29.     },
  30.     elastic: function (n) {
  31.         if (n == !!n) {
  32.             return n;
  33.         }
  34.         return pow(2, -10 * n) * math.sin((n - .075) * (2 * PI) / .3) + 1;
  35.     },
  36.     bounce: function (n) {
  37.         var s = 7.5625,
  38.             p = 2.75,
  39.             l;
  40.         if (n < (1 / p)) {
  41.             l = s * n * n;
  42.         } else {
  43.             if (n < (2 / p)) {
  44.                 n -= (1.5 / p);
  45.                 l = s * n * n + .75;
  46.             } else {
  47.                 if (n < (2.5 / p)) {
  48.                     n -= (2.25 / p);
  49.                     l = s * n * n + .9375;
  50.                 } else {
  51.                     n -= (2.625 / p);
  52.                     l = s * n * n + .984375;
  53.                 }
  54.             }
  55.         }
  56.         return l;
  57.     }
  58. };
  59. ef.easeIn = ef["ease-in"] = ef["<"];
  60. ef.easeOut = ef["ease-out"] = ef[">"];
  61. ef.easeInOut = ef["ease-in-out"] = ef["<>"];
  62. ef["back-in"] = ef.backIn;
  63. ef["back-out"] = ef.backOut;

Another fun chunk of code directly from the Raphaël source. Makes me think of the Penner easing equations.

// animation // javascript // math

Repeatedly Refresh Webpage

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.   <meta charset="UTF-8">
  5.   <meta http-equiv="refresh" content="2"> 
  6.   <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7.   <title>Title</title>
  8. </head>
  9. <body>
  10.   <script>
  11.     document.body.innerHTML = Math.random() * 100;
  12.   </script>
  13. </body>
  14. </html>

Refresh a webpage every two seconds with: 

  1. <meta http-equiv="refresh" content="2">

// hacks // html
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