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Flower of Life Canvas

  1. ((
  2.   d = document,
  3.   b = d.body,
  4.   rad = (innerWidth * 1.9) / 6,
  5.   theta = 0,
  6.   thetaSpeed = 0.03,
  7.   cx = innerWidth / 4,
  8.   cy = innerHeight / 4,
  9.   ox = 0,
  10.   oy = 0,
  11.   offTheta,
  12.   x, y, ang, step, blur,
  13.   _
  14. ) => {
  15.   Object.assign(b.style, {
  16.     background: 'black',
  17.     margin: 0
  18.   }) 
  19.  
  20.   blur = Object.assign(d.createElement`canvas`, {
  21.     width: innerWidth * 2,
  22.     height: innerHeight * 2
  23.   }).getContext`2d`
  24.  
  25.   with (Math) {
  26.     with (b.appendChild(
  27.       Object.assign(d.createElement`canvas`, {
  28.         width: innerWidth * 2,
  29.         height: innerHeight * 2
  30.       })
  31.     ).getContext`2d`) {
  32.       Object.assign(canvas.style, {
  33.         width: '100%',
  34.         height: '100%'
  35.       })
  36.  
  37.       onresize = () => {
  38.         blur.canvas.width = canvas.width = innerWidth * 2
  39.         blur.canvas.height = canvas.height = innerHeight * 2
  40.         rad = (innerWidth * 2.5) / 6
  41.         cx = innerWidth
  42.         cy = innerHeight
  43.         fillStyle = '#000'
  44.         fillRect(0, 0, canvas.width, canvas.height)
  45.       }
  46.       onresize()
  47.  
  48.       step = (PI * 2) / 6
  49.  
  50.       _ = t => {
  51.         ang = ~~(t / 500) % 7
  52.  
  53.         globalAlpha = 0.23
  54.         fillStyle = '#fff'
  55.  
  56.         if (ang > 0) {
  57.           offTheta = step * ang
  58.           ox = rad * cos(offTheta)
  59.           oy = rad * sin(offTheta)
  60.         } else {
  61.           ox = 0
  62.           oy = 0
  63.         }
  64.  
  65.         for (i = 0; i < 20; i++) {
  66.           x = ox + cx + rad * cos(theta)
  67.           y = oy + cy + rad * sin(theta)
  68.           theta += thetaSpeed
  69.  
  70.           fillRect(x, y, 4, 4)
  71.         }
  72.  
  73.         blur.drawImage(canvas, 0, 0)
  74.  
  75.         globalAlpha = 0.05
  76.         drawImage(blur.canvas, 0, 2)
  77.  
  78.         requestAnimationFrame(_)
  79.       }
  80.       _()
  81.     }
  82.   }
  83. })()

Speed coded animated flower of life on canvas

snippet.zone ~ 2021-22 /// {s/z}