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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

zxlp Hidden SierpiƄski

  1. // https://actionsnippet.com/?p=349
  2. // zxlp : Hidden SierpiƄski
  3. const canvas = document.createElement('canvas')
  4. const c = canvas.getContext('2d')
  5.  
  6. let s = .5
  7. canvas.width = innerWidth * s
  8. canvas.height = innerHeight * s
  9. canvas.style.transformOrigin = '0 0'
  10. canvas.style.scale = 1 / s
  11. canvas.style.imageRendering = 'pixelated'
  12. document.body.append(canvas)
  13.  
  14. const frame = document.createElement('canvas')
  15. const fc = frame.getContext('2d')
  16. frame.width = canvas.width
  17. frame.height = canvas.height
  18.  
  19. const copy = document.createElement('canvas')
  20. const cc = copy.getContext('2d')
  21. copy.width = canvas.width
  22. copy.height = canvas.height
  23.  
  24. frame.style.left = '100px' 
  25. frame.style.top = '100px'
  26.  
  27. fc.fillStyle = 'red'
  28. fc.fillRect(0, 0, 100, 100)
  29.  
  30. const _ = c.getImageData(0, 0, canvas.width, canvas.height)
  31.  
  32. const size = canvas.width * canvas.height * 4
  33.  
  34. let mx = 0
  35. let mouseX = 0
  36.  
  37. onpointermove = e => {
  38.   mx = e.clientX
  39. }
  40.  
  41. function loop() {
  42.   mouseX += (mx - mouseX) / 50
  43.  
  44.   for (let i = 0; i < size; i += 4) {
  45.     let ox = (~~(i / 4)) % canvas.width
  46.     let oy = (~~(i / 4)) / canvas.width
  47.     let col = ((ox | oy) * mouseX / 20) % 255
  48.  
  49.     _.data[i] = 0
  50.     _.data[i + 1] = col
  51.     _.data[i + 2] = col
  52.     _.data[i + 3] = 255
  53.   }
  54.  
  55.   c.putImageData(_, 0, 0)
  56.  
  57.   requestAnimationFrame(loop);
  58. }
  59. loop();

port of an old actionsnippet (see here) – made a youtube short of it at some point here…

// binary // canvas // color // graphics // hacks // hex // javascript // math // oldschool // tricks

crystl

  1. const canvas = document.createElement('canvas')
  2. const c = canvas.getContext('2d')
  3.  
  4. let w;
  5. let h;
  6.  
  7. onresize = e => {
  8.   w = innerWidth * 2
  9.   h = innerHeight * 2
  10.   canvas.width = w
  11.   canvas.height = h
  12.   canvas.style.width = (w / 2) + 'px'
  13.   canvas.style.height = (h / 2) + 'px'  
  14.   c.fillStyle = '#000'
  15.   c.fillRect(0, 0, w, h) 
  16. }
  17. onresize()
  18.  
  19. document.body.append(canvas)
  20. canvas.style.filter = 'contrast(2) brightness(1.2)'
  21.  
  22. class Crystal {
  23.   constructor() {
  24.     this.init()
  25.   }
  26.   init() {
  27.     this.x = w / 2
  28.     this.y = h * .7
  29.     this.rad = 250
  30.  
  31.     this.sides = 5
  32.     // + ~~(Math.random() * 5)
  33.     this.shrinkTime = 400 + Math.random() * 100 
  34.     this.t = Math.random() * 7
  35.     this.st = this.t;
  36.     this.step = (Math.PI * 2) / this.sides
  37.     this.time = 0
  38.     this.shrinkSpeed = 1.3 - Math.random() * .6
  39.     this.a = 0
  40.     this.ad = .05
  41.   }
  42.  
  43.   draw() { 
  44.  
  45.     this.a += (this.ad - this.a) / 150
  46.     c.lineWidth = 5
  47.     c.strokeStyle = `rgba(255, 255, 255, ${this.a})`
  48.     c.fillStyle = `rgba(0, 111, 122, ${this.a / 2})`
  49.     c.beginPath()
  50.  
  51.     for (let j = 0; j < 2; j++) {
  52.       this.time++
  53.       if (this.time > this.shrinkTime) {
  54.         this.rad -= this.shrinkSpeed
  55.         if (this.rad < 0) {
  56.           setTimeout(() => {
  57.             c.fillStyle = 'rgba(0, 0, 0, .02)'
  58.             c.fillRect(0, 0, w, h)
  59.             this.init()
  60.           }, 500)
  61.           return;
  62.         }
  63.       }
  64.       this.t = this.st
  65.       for (let i = 0; i < this.sides; i++) {
  66.         let p = {
  67.           x: this.rad * Math.cos(this.t),
  68.           y: this.rad * .6 * Math.sin(this.t)
  69.         }
  70.         this.t += this.step;
  71.         if (i === 0) {
  72.           c.moveTo(this.x + p.x, this.y + p.y)
  73.         } else {
  74.           c.lineTo(this.x + p.x, this.y + p.y)
  75.         }
  76.       }
  77.       c.closePath()
  78.       c.stroke() 
  79.       c.fill()
  80.  
  81.  
  82.       this.y -= 1
  83.     }
  84.   }
  85. }
  86.  
  87. let cryst = new Crystal()
  88.  
  89.  
  90. setInterval(() => {
  91.   for (let i = 0; i < 3; i++) cryst.draw()
  92. }, 16)

quick crystal for recent youtube short…

// 3d // canvas // gradients // graphics // hacks // isometric // javascript // math // random // speed-coded // speedcoding // tricks

squigs

  1. const canvas = document.body.appendChild(document.createElement("canvas"));
  2. const c = canvas.getContext("2d");
  3. document.body.style.margin = 0;
  4.  
  5. function resize() {
  6.   canvas.width = innerWidth * 2;
  7.   canvas.height = innerHeight * 2;
  8.   canvas.style.width = innerWidth + "px";
  9.   canvas.style.height = innerHeight + "px";
  10. }
  11. addEventListener("resize", resize);
  12. resize();
  13.  
  14. const PAD = 50;
  15. const RAD = 2;
  16. const SPEED = 40;
  17. const TWO_PI = Math.PI * 2;
  18.  
  19. let mode = "draw";
  20.  
  21. let t = Math.random() * TWO_PI,
  22.   x = innerWidth,
  23.   y = innerHeight,
  24.   vx = 0,
  25.   vy = 0,
  26.   ta = 0,
  27.   w = 10,
  28.   h = 1,
  29.   hue = 20;
  30.  
  31. function loop() {
  32.   c.globalAlpha = 1;
  33.   if (Math.random() < 0.12) {
  34.     let alpha = 0.02;
  35.     if (Math.random() < 0.1) alpha = 0.1;
  36.     c.fillStyle = `rgba(255, 255, 255, ${alpha})`;
  37.     c.fillRect(0, 0, canvas.width, canvas.height);
  38.   }
  39.   for (var i = 0; i < SPEED; i++) {
  40.     t = Math.sin(ta) * TWO_PI;
  41.     vx = RAD * Math.cos(t);
  42.     vy = RAD * Math.sin(t);
  43.     ta += Math.random() * 0.1 - 0.05;
  44.     x += vx;
  45.     y += vy;
  46.  
  47.     if (Math.random() < 0.005) {
  48.       mode = "no draw";
  49.       hue = [200, 20, 10, 40][~~(Math.random() * 4)];
  50.       if (Math.random() < 0.5) {
  51.         w = Math.random() * 200;
  52.         h = Math.random() * Math.random() * 10;
  53.       } else {
  54.         w = Math.random() * 20;
  55.         h = Math.random() * Math.random() * 200;
  56.       }
  57.     } else if (Math.random() < 0.005) {
  58.       mode = "draw";
  59.     }
  60.  
  61.     if (mode === "draw") {
  62.       c.shadowColor = "rgba(0, 205, 205, 0.2)";
  63.       c.shadowBlur = 5;
  64.       c.fillStyle = `hsl(${hue}, 100%, 50%)`;
  65.       c.fillRect(x, y, w, h);
  66.  
  67.       c.shadowColor = null;
  68.       c.shadowBlur = 0;
  69.     }
  70.  
  71.     if (x < -PAD) {
  72.       x = innerWidth + PAD;
  73.     } else if (x > canvas.width + PAD) {
  74.       x = -PAD;
  75.     }
  76.     if (y < -PAD) {
  77.       y = innerHeight + PAD;
  78.     } else if (y > canvas.height + PAD) {
  79.       y = -PAD;
  80.     }
  81.   }
  82.   c.globalAlpha = 0.9;
  83.   c.drawImage(canvas, -2, -1, canvas.width + 3, canvas.height + 4);
  84.  
  85.   requestAnimationFrame(loop);
  86. }
  87. loop();

More fun speed coding for some recent youtube shorts…

// canvas // curves // filters // hacks // hex // javascript // math // random // speedcoding // tricks

Swrls

  1. const canvas = document.createElement("canvas");
  2. const c = canvas.getContext("2d");
  3.  
  4. canvas.width = innerWidth;
  5. canvas.height = innerHeight;
  6. document.body.append(canvas); 
  7.  
  8. const TWO_PI = 2 * Math.PI;
  9.  
  10. class Dot {
  11.   constructor(id, x, y, theta, parent) {
  12.     this.x = x;
  13.     this.y = y;
  14.     this.t = theta;
  15.     this.vx = Math.cos(this.t) * Math.random() * 2;
  16.     this.vy = Math.sin(this.t) * Math.random() * 2;
  17.     this.life = 30;
  18.     this.col = parent.col;
  19.  
  20.     if (Math.random() < 0.005) this.other = true;
  21.     if (this.other) {
  22.       this.life = 1000;
  23.       this.t = Math.random() * 7;
  24.       this.vx = Math.cos(this.t) * Math.random() * 2;
  25.       this.vy = Math.sin(this.t) * Math.random() * 2;
  26.       this.col = "black";
  27.     }
  28.     this.iter = 0;
  29.     this.parent = parent;
  30.     this.id = id;
  31.     this.alpha = 0.25;
  32.  
  33.     if (Math.random() < 0.3) this.alpha = 0.25;
  34.   }
  35.  
  36.   draw() {
  37.     this.x += this.vx;
  38.     this.y += this.vy;
  39.     this.iter++;
  40.     if (this.iter > this.life) {
  41.       delete this.parent.dots[this.id];
  42.     }
  43.     c.fillStyle = this.col;
  44.     c.globalAlpha = this.alpha;
  45.     if (!this.no) this.alpha -= 0.00125;
  46.     c.fillRect(this.x, this.y, this.parent.size, this.parent.size);
  47.   }
  48. }
  49.  
  50. class Stain {
  51.   constructor(x = innerWidth, y = innerHeight) {
  52.     this.x = x / 2;
  53.     this.y = y / 2;
  54.     this.num = 1;
  55.     this.step = TWO_PI / this.num;
  56.  
  57.     this.size = 1 + Math.random() * Math.random() * 2;
  58.     this.rad = Math.random() * 300;
  59.     this.dots = {};
  60.     this.dotId = 0;
  61.     this.col = Math.random() < 0.8 ? "white" : "black";
  62.     this.to = Math.random() * 7;
  63.     this.S = 20 + Math.random() * 50;
  64.     this.R = 100 + Math.random() * 300;
  65.     this.rr = 50 + Math.random() * 300;
  66.     this.dir = Math.random() < 0.6 ? 1 : Math.random() * 10 - 5;
  67.     this.v = 1;
  68.     this.tt = 0;
  69.     if (Math.random() * 0.25) this.v = Math.random() * 5;
  70.   }
  71.  
  72.   draw() { 
  73.     const circ = this.rad * TWO_PI;
  74.     this.rad -= this.v;
  75.  
  76.     this.step = TWO_PI / circ;
  77.  
  78.     if (this.rad > 0) {
  79.       for (let i = 1; i <= this.R; i += this.S) {
  80.         let t = (i * this.step + this.to) * this.dir;
  81.         let x = this.x + this.rad * Math.cos(t);
  82.         let y = this.y + this.rad * Math.sin(t);
  83.         this.dots[this.dotId] = new Dot(this.dotId, x, y, t, this);
  84.         this.dotId++;
  85.       }
  86.     }
  87.     for (let i in this.dots) {
  88.       if (this.dots[i]) this.dots[i].draw();
  89.     }
  90.   }
  91. }
  92.  
  93. onresize = e => {
  94.   canvas.width = innerWidth;
  95.   canvas.height = innerHeight;
  96.   c.fillStyle = "black";
  97.   c.fillRect(0, 0, innerWidth, innerHeight)
  98. }
  99.  
  100. onresize()
  101.  
  102. let ss = [new Stain()];
  103.  
  104. function loop() {
  105.   if (Math.random() < 0.05) {
  106.     ss.push(
  107.       new Stain(Math.random() * innerWidth * 2, Math.random() * innerHeight * 2)
  108.     );
  109.   }
  110.   ss.forEach((s) => s.draw());
  111.   c.globalAlpha = 0.05;
  112.   c.drawImage(canvas, 0, 3, canvas.width + 0.2, canvas.height - 6);
  113.   c.globalAlpha = 1;
  114.   requestAnimationFrame(loop);
  115. }
  116. loop();

Speed coding for some recent youtube shorts…

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