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AboutAll PostsWarningRandom

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

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