How to draw this shape in Basic Typst?

Questions
1

image
image400×400 61.7 KB

2

You can use a sharp gradient as the fill property of a circle.

#let c = blue
#circle(stroke: c, fill: gradient.linear(c, c.transparentize(100%), angle: -60deg).sharp(2))
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3

Awesome, but it makes it jagged. I figured out what worked for me using this link

4

Could you post your specific solution, so that other users are able to see it.

Then you could mark your question as solved.

Thanks :slight_smile:

5

Something like this worked for me:

#let hybrid_circle(top_color, bot_color) = canvas({
  import draw: *

    merge-path(
      fill: top_color,
      stroke: none,
      {
      arc((0,0), start: 45deg, stop: 360deg, radius: 8pt, anchor: "origin")

    })

    merge-path(
      fill: bot_color,
      stroke: none,
      {
      arc((0,0), start: 45deg, stop: -135deg, radius: 8pt, anchor: "origin")
      }
    )
    
})
6

That’s not basic Typst. It’s using Typst with 3rd-party packages. CeTZ uses very advanced Typst under the hood.

Also, your example does not compile.

2 Likes
7

I hope someone knows how to do it without CeTZ

8

A non-CeTZ solution:

#let thisShape(dia, angle: 135deg, col: blue) = {
  let a = dia / 2
  let b = 0.55342925736 * a
  let c = 0.99873327689 * a

  let o(x, y) = {
    (a + x, a + y)
  }

  rotate(
    angle,
    curve(
      fill: col,
      stroke: col,
      
      curve.move(o(0mm, a)),
      curve.cubic(o(b, c), o(c, b), o(a, 0mm)),
      curve.cubic(o(c, -b), o(b, -c), o(0mm, -a)),
      curve.close(mode: "straight"),
      
      curve.cubic(o(-b, c), o(-c, b), o(-a, 0mm)),
      curve.cubic(o(-c, -b), o(-b, -c), o(0mm, -a)),
      
      curve.cubic(o(-b, -c), o(-c, -b), o(-a, 0mm)),
      curve.cubic(o(-c, b), o(-b, c), o(0mm, a)),
    )
  )
}

#thisShape(2cm)

image
image132×136 2.92 KB

I actually didn’t know how to draw this shape. I had to learn how using the curve documentation and this site which explains how to approximate a circle using a bezier curve.
It was a fun challenge to try and solve. Maybe you wouldn’t find it so fun, but don’t doubt yourself. "Things are only impossible until they’re not"¹, and often times the difference is learning something new.

2 Likes
9

Another option would be to use a clipped box and turn it into a circle by setting the radius size to 50% and drawing a polygon inside:

#let this-shape(radius: 1cm) = {
  box(width: 2 * radius, height: 2 * radius, radius: 50%, stroke: blue, clip: true,
    polygon(
      fill: blue,
      stroke: blue,
      (0%, 0%),
      (100%, 100%),
      (0%,  100%),
    )
  )
}

#this-shape(radius: 1cm)

image
image159×153 5.2 KB

3 Likes
10

Or if you for whatever reason want to rotate the inner thingy:

#let this-shape(radius: 1cm, angle: -45deg) = {
  box(width: 2 * radius, height: 2 * radius, radius: 50%, stroke: blue, clip: true,
  rotate(
    angle, 
    origin: right+horizon,
    polygon(
      fill: blue,
      stroke: blue,
      (0%, 0%),
      (50%, 0%),
      (50%, 100%),
      (0%,  100%),
    )
  )
  )
}

#for i in range(0, int(90deg/15deg)+1) {
  this-shape(radius: 5mm, angle: i * -15deg) + h(1mm)
}

image

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