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AboutAll PostsWarningRandom

T Plant

  1. const { PI } = Math
  2. const canvas = document.createElement('canvas')
  3. const c = canvas.getContext('2d')
  4.  
  5. canvas.width = innerWidth * 2
  6. canvas.height = innerHeight * 2
  7. canvas.style.scale = '.5 .5'
  8. canvas.style.transformOrigin = '0 0'
  9. document.body.append(canvas)
  10. let o = -PI / 2
  11.  
  12. const r = (n = 1) => Math.random() * n
  13.  
  14. function branch(x, y, ang = o, f) {
  15.   let vx, vy
  16.   let life = 0
  17.   let dead
  18.   let vv = 1 + r(2)
  19.   let ll = r(200)
  20.   let a = 1;
  21.   if (f) a = 0
  22.  
  23.   return () => {
  24.     if (dead) return
  25.     if (life > 200 + ll) {
  26.       dead = true;
  27.       let n = 10 + r(20)
  28.       for (let i = 0; i < n; i++) {
  29.  
  30.         let dest = {
  31.           x,
  32.           y: y + r(30) - 15
  33.         }
  34.         bs.push(leafPart(x, y, dest))
  35.       }
  36.     }
  37.  
  38.     life++
  39.     if (life > 10 && a >= 1 && Math.random() < .02 && bs.length < 20) {
  40.       if (r() < .3) {
  41.         dead = true
  42.         bs.push(
  43.           branch(x, y, ang + r(PI / 4)))
  44.         branch(x, y, ang + r(-PI / 4))
  45.         return
  46.       }
  47.       bs.push(
  48.         branch(x, y, o + r(2) - 1))
  49.     }
  50.     vx = Math.cos(ang)
  51.     vy = Math.sin(ang) * vv
  52.     ang += r(.1) - .05
  53.  
  54.     x += vx
  55.     y += vy
  56.     c.fillStyle = `rgba(255, 255, 255, ${a})`
  57.     if (f) {
  58.       a += .01
  59.     }
  60.  
  61.     c.fillRect(x, y, 4, 4)
  62.   }
  63. }
  64.  
  65. function leafPart(x, y, dest) {
  66.   let ang = r(7)
  67.   let rr = r(1) + .5
  68.   let vv = -r(3)
  69.   let life = 0
  70.   let maxLife = 40 + r(200)
  71.   let vx
  72.   let vy
  73.   let CC = 190 + r(30)
  74.  
  75.   return () => {
  76.     life++
  77.     if (life < maxLife) {
  78.       vx = Math.cos(ang) * rr
  79.       vy = Math.sin(ang) * rr + vv
  80.       x += vx
  81.       y += vy
  82.       ang += r(.4) - .2
  83.       c.fillStyle = 'rgba(255, 255, 255, .1)'
  84.     } else {
  85.       c.fillStyle = `rgba(255, ${CC}, ${CC}, .25)`
  86.       x += (dest.x - x) / 42
  87.       y += (dest.y - y) / 12
  88.     }
  89.  
  90.     c.fillRect(x, y, 4, 4)
  91.   }
  92. }
  93. let bs = []
  94. let lf = []
  95.  
  96. bs.push(
  97.   branch(innerWidth, innerHeight * 1.9, o, true)
  98. )
  99.  
  100. function loop() {
  101.   bs.forEach(b => b())
  102.   requestAnimationFrame(loop)
  103. }
  104. loop()

Been pretty consistently posting speed-coded youtube shorts. This is a recent one. Magic numbers, nonsense variable names, and strange noops 😀

See the short here…

// animation // canvas // codegolf // color // curves // graphics // hacks // javascript // random // speed-coded // speedcoding // tricks

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