Logo for the JuliaDiff organization?

Offtopic
, ,
1

Since JuliaCon and its avalanche of stickers are upon us, I thought it would be nice to give JuliaDiff a logo. We have one on GitHub but it’s old and not really differentiation-specific. I gave it a try with Luxor.jl, but I’m a bit of a newbie, so I would really like to know what people on here think… especially @cormullion :wink:
Feel free to play around with the code and suggest alternatives!

luxor-drawing-165749_176

Logo generation code 
using Colors, Luxor

(; red, green, blue, purple) = Colors.JULIA_LOGO_COLORS

@draw begin
	origin(0, 0)
	background("white")
	ref = "black"

	setfont("Liberation Sans Medium", 330)
	setline(30)
	setlinejoin("square")
	
	red_point = Point(100, 100)
	purple_point = Point(300, 100)
	green_point = Point(200, 300)
	red_purple_point = (red_point + purple_point) / 2
	red_green_point = (red_point + green_point) / 2
	purple_green_point = (purple_point + green_point) / 2
	f_point = Point(320, 400)
	
	red_black = blend(red_point, 0, red_point, 100, red, ref)
	purple_black = blend(purple_point, 0, purple_point, 100, purple, ref)
	green_black = blend(green_point, 0, green_point, 100, green, ref)
	blue_black = blend(f_point, 0, f_point, 350, blue, ref)
	
	# red corner
	setblend(red_black)
	poly([red_green_point, red_point, red_purple_point])
	strokepath()
	# purple corner
	setblend(purple_black)
	poly([purple_green_point, purple_point, red_purple_point])
	strokepath()
	# green corner
	setblend(green_black)
	poly([purple_green_point, green_point, red_green_point])
	strokepath()
	# function
	setblend(blue_black)
	settext("f", f_point) 
end 500 400
10 Likes
2

I find the existing logo very cool:

In my opinion, taking the isolines could be a good starting point for making it something vector-like. But I can’t allocate time to explore that further. Perhaps someone else feels the same and can explore this.

2 Likes
3

A rounder, friendlier version that reuses the font from the Julia logo

luxor-drawing-071614_203

4 Likes
4

Cool stuff! I love the direction.

The issue with the current logo isn’t so much that it’s not very literal - logos aren’t illustrations and don’t have to be literal - it’s just that it’s a bit untidy. Oddly cropped, peculiar colors, and looks a bit like the rear lights of the car in front of you in the rain. If it could be simpler, vectorised, drawn with more detail - perhaps it could be refreshed…

The triangle shape in your sketches is great - I don’t think it’s been overused in the Julia ecosystem, and I think it could be a strong component of a good logo. Lots of potential for exploration I think:

Screenshot 2024-04-27 at 09.04.14

I’d also suggest trying some ideas without the blends - blends are cool, but don’t always reproduce well on stickers and t-shirts, or at low resolutions…

Maybe you can get the asymmetrical look (with the walking stick) working well… I’m not sure the “f” is saying anything to me, but perhaps you’re tapping in to some maths vibes that I wouldn’t be aware of. :joy:

24 Likes
5

Thanks so much for taking an interest and making some propositions! I love the Escher vibes of your take

Just for context in case some people had missed it: this triangle shape is the \nabla operator \nabla, which is used in math to denote the gradient of a function. In other words, \nabla f(x) is the gradient of the function f at the point x, aka the direction of largest slope. Hence the connection with JuliaDiff, whose main purpose is taking derivatives.

1 Like
6

would you mind sharing the source code?

Your graphics are always fascinating and it would be cool to see how you make them :smiley:

2 Likes
7

With that shape and that blue color, the f really looks like facebook’s. Maybe a f instead would look better?

2 Likes
8

One take on it:

image

image

If anyone wants to play with it:

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gg==
"
       id="image1760"
       x="-14.385302"
       y="34.848236" />
  </g>
</svg>

image

7 Likes
9

Yes, no problem - although there’s no maths constructions here, I wasn’t sure how to make it geometrically … :slight_smile:

code 
using Luxor

function draw_leg(pos, rotation)
    pgon = Point[Point(102.0, -60.0), 
        Point(123.0, -96.0), 
        Point(-209.0, -96.0), 
        Point(-25.0, 229.0), 
        Point(20.0, 229.0), 
        Point(-147.0, -60.0)]
    @layer begin
        translate(pos)
        rotate(rotation)
        poly(pgon, :fillpreserve, close=true)
        sethue("gold")
        strokepath()
    end
end

@drawsvg begin
    setline(0.5)
    background(sethue("purple") .* 0.6 ...)
    for (n, θ) in enumerate(range(0, 2π - 2π/3, step=2π/3))
        sethue([Luxor.julia_red, Luxor.julia_purple, Luxor.julia_green][n])
        draw_leg(O, θ)
    end
end
8 Likes
10

Aother idea:

image
image809×478 34.8 KB

(I don’t like them too much, just throwing out ideas)

These ones I actually like:

image

another, with text:

image

and without text:

image

variants

image
image520×585 27.1 KB

7 Likes
11

What about a very slightly blended version of @cormullion’s logo, to boost the 3D feel?

image
image998×916 55.5 KB

image
image998×916 56.4 KB

11 Likes
12

Maybe something like this:

juliadifflogo

1 Like
13

A relativistic Julia gradient:
JuliaDiff_relativistic_gradient_animation

9 Likes
14

atled
atled1920×2012 167 KB

2 Likes
15

LOVE the impossible triangle type \nabla above!!

Why not use a Jj instead of Ff to emphasize julia?

I see that:

uses j and the rmgb dots, which is way cool!

Start with \delta j or \nabla J ?

\delta julia
julia \delta
julia_\delta
\delta ulia

\nabla Julia
Julia \Delta

16

\nabla J or any of the variants (with J not spelled out as Julia) looks like we are differentiating a Jacobian J and not a function f.

3 Likes
17

Since the nabla symbol and the Julia logo are both triangles (pointing in opposite directions) I think you could get something cool by juxtaposing them somehow.

e.g. you could put them side by side to make a parallelogram

e.g. you could overlay them to make a six pointed star

(On phone can’t demonstrate)

18

If we do this we’ll lose the meaning of \nabla, which should be a vertical triangle. Alternately we have to put the three dots on top and get a diamond?

I think this has religious connotations that we want to avoid in a logo?

19

I just meant something simple like this - but you know, fancier, with shadows and lens flare and not done in paint

image
image1012×563 3.48 KB

3 Likes
20

I quite like this because it means “the derivative of Julia” - when many of the packages are precisely for taking derivatives of Julia code.

1 Like