- const SIZE = 40
mixin cylinder(radius = 10, sides = 10, cut = [5, 10], top = true, bottom = true)
  - const innerAngle = (((sides - 2) * 180) / sides) * 0.5
  - const cosAngle = Math.cos(innerAngle * (Math.PI / 180))
  - const side =  2 * radius * Math.cos(innerAngle * (Math.PI / 180))
  //- Use the cut to determine how many sides get rendered and from what point
  .cylinder(style=`--side: ${side}; --sides: ${sides}; --radius: ${radius};` class!=attributes.class)
    if top
      .cylinder__end.cylinder__segment.cylinder__end--top
    if bottom
      .cylinder__end.cylinder__segment.cylinder__end--bottom
    - const [start, end] = cut
    - let i = start
    while i < end
      .cylinder__side.cylinder__segment(style=`--index: ${i};`)
      - i++

mixin cuboid()
  .cuboid(class!=attributes.class)
    if block
      block
    - let s = 0
    while s < 6
      .cuboid__side
      - s++

.scene
  svg(role='img' viewbox='0 0 24 24' xmlns='http://www.w3.org/2000/svg')
    title DigitalOcean
    path(d='M12.04 0C5.408-.02.005 5.37.005 11.992h4.638c0-4.923 4.882-8.731 10.064-6.855a6.95 6.95 0 014.147 4.148c1.889 5.177-1.924 10.055-6.84 10.064v-4.61H7.391v4.623h4.61V24c7.86 0 13.967-7.588 11.397-15.83-1.115-3.59-3.985-6.446-7.575-7.575A12.8 12.8 0 0012.039 0zM7.39 19.362H3.828v3.564H7.39zm-3.563 0v-2.978H.85v2.978z')
  .logo(style=`--size: ${SIZE}`)
    .logo__arc.logo__arc--inner
      +cylinder((SIZE * 0.61) * 0.5, 80, [0, 60], true, true).cylinder-arc.cylinder-arc--inner
    .logo__arc.logo__arc--outer
    .logo__square.logo__square--one
      +cuboid().square-cuboid.square-cuboid--one
    .logo__square.logo__square--two
      +cuboid().square-cuboid.square-cuboid--two
    .logo__square.logo__square--three
      +cuboid().square-cuboid.square-cuboid--three

:root
  --size 40
  --bg hsl(0, 0%, 98%)
  --hue 215
  --rotation-y -75deg
  --rotation-x -14deg
  --remove 0
  --tilt-x -40

.cuboid
  width 100%
  height 100%
  position relative
  // 1 is the top and go t, r, back, l, f, b

  &__side
    filter brightness(var(--b, 1))
    position absolute

  &__side:nth-of-type(1)
    --b 1.1
    height calc(var(--depth, 20) * 1vmin)
    width 100%
    top 0
    transform translate(0, -50%) rotateX(90deg)

  &__side:nth-of-type(2)
    --b 0.9
    height 100%
    width calc(var(--depth, 20) * 1vmin)
    top 50%
    right 0
    transform translate(50%, -50%) rotateY(90deg)

  &__side:nth-of-type(3)
    --b 0.5
    width 100%
    height calc(var(--depth, 20) * 1vmin)
    bottom 0
    transform translate(0%, 50%) rotateX(90deg)

  &__side:nth-of-type(4)
    --b 1
    height 100%
    width calc(var(--depth, 20) * 1vmin)
    left 0
    top 50%
    transform translate(-50%, -50%) rotateY(90deg)

  &__side:nth-of-type(5)
    --b 0.8
    height 100%
    width 100%
    transform translate3d(0, 0, calc(var(--depth, 20) * 0.5vmin))
    top 0
    left 0

  &__side:nth-of-type(6)
    --b 1.2
    height 100%
    width 100%
    transform translate3d(0, 0, calc(var(--depth, 20) * -0.5vmin)) rotateY(180deg)
    top 0
    left 0

.cylinder
  --bg 'hsl(%s, 100%, 50%)' % var(--hue)
  background hsla(10, 100%, 50%, 0.5)
  height 100%
  width 100%
  position relative

  &__segment
    filter brightness(var(--b, 1))
    background var(--bg, hsl(0, 80%, 50%))
    position absolute

  // Top
  &__end
    --b 1.2
    --end-coefficient 0.5
    top 50%
    left 50%
    height 100%
    width 100%
    border-radius 50%
    opacity calc(1 - var(--remove))
    transform translate3d(-50%, -50%, calc((var(--depth, 0) * var(--end-coefficient)) * 1vmin))
    transition opacity 0.2s

  &__end--bottom
    --b 0.8
    --end-coefficient -0.5

  &__side
    --b 0.89
    height calc(var(--depth, 30) * 1vmin)
    width calc(var(--side) * 1vmin)
    top 50%
    left 50%
    transform translate(-50%, -50%) rotateX(90deg) rotateY(calc((var(--index, 0) * 360 / var(--sides)) * 1deg)) translate3d(50%, 0, calc((var(--radius) * (var(--cylinder-projection, 100) / 100)) * 1vmin))

*
*:after
*:before
  box-sizing border-box
  transform-style preserve-3d
  touch-action none

body
  background var(--bg)
  min-height 100vh
  display grid
  place-items center

.scene
  position relative
  transform translate3d(0, 0, 100vmin) rotateX(-16deg) rotateY(28deg) rotateX(90deg) rotateX(calc(var(--tilt-x, 0) * 1deg))

.logo
  height calc(var(--size) * 1vmin)
  width calc(var(--size) * 1vmin)
  position absolute
  top 50% 
  left 50%
  opacity calc(1 - (var(--reveal, 0) * 0.5))
  transform translate(-50%, -50%)
  
  &__arc
    border-radius 50%
    position absolute
    height calc(var(--diameter) * 1%)
    width calc(var(--diameter) * 1%)
    transform translate(-50%, -50%)
    top 50%
    left 50%
    transition opacity 0.2s
    
    &--inner
      --diameter 61
      transform translate(-50%, -50%)
      
    &--outer
      --diameter 100
      opacity 0.5
      transform translate(-50%, -50%)
      border calc(var(--size) * 0.1925vmin) solid hsl(215, 100%, 50%)
      -webkit-mask conic-gradient(transparent 0deg 90deg, black 90deg)
      mask conic-gradient(transparent 0deg 90deg, black 90deg)
      transform translate(-50%, -50%) rotate(180deg)
  
  &__square
    position absolute
    height calc(var(--height, 0) * 1%)
    width calc(var(--width, 0) * 1%)
    left calc(var(--x, 0) * 1%)
    top calc(var(--y, 0) * 1%)

    &--one
      --height 19.25
      --width 19.25
      --x 31
      --y 61.5
    
    &--two
      --height 14.75
      --width 14.75
      --x 16
      --y 80.75
    
    &--three
      --height 12.5
      --width 12.5
      --x 3.5
      --y 68.25
      
.square-cuboid
  opacity 0.5
  .cuboid__side
    background 'hsl(%s, 100%, 50%)' % var(--hue)
  &--one
    --depth calc((var(--size) * 0.1925) * 0)
  &--two
    --depth calc((var(--size) * 0.1475) * 0)
  &--three
    --depth calc((var(--size) * 0.125) * 0)
    
.cylinder-arc
  --height calc(var(--size) * 0.1925)
  --depth calc((var(--size) * 0.1925) * var(--cylinder-depth, 1))
  transform translate(-50%, -50%) rotate(-90deg)
  position absolute
  top 50%
  left 50%

import { GUI } from 'https://cdn.skypack.dev/dat.gui'

const CONFIG = {
	depth: 1,
	projection: 100,
	remove: false,
	tilt: 40,
}

const CTRL = new GUI()
CTRL.add(CONFIG, 'depth', 0, 5, 0.1)
	.name('Depth (vmin)')
	.onChange(depth =>
		document.documentElement.style.setProperty('--cylinder-depth', depth)
	)
CTRL.add(CONFIG, 'projection', 0, 150, 1)
	.name('Projection(%)')
	.onChange(projection =>
		document.documentElement.style.setProperty('--cylinder-projection', projection)
	)
CTRL.add(CONFIG, 'remove')
	.name('Remove Ends?')
	.onChange(remove =>
		document.documentElement.style.setProperty('--remove', remove ? 1 : 0)
	)
CTRL.add(CONFIG, 'tilt', 0, 100, 1)
	.name('Tilt(deg)')
	.onChange(tilt =>
		document.documentElement.style.setProperty('--tilt-x', tilt * -1)
	)