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Cool Math geek Text Art: Fermat's Spiral Poster
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Cool Math geek Text Art: Fermat's Spiral Poster
Original image first created by Javascript, then vectorized, put the definition on it in text art, and then threw in a bunch of "special effects".
The following is a definition from Wikipedia. Dont' ask me to explain, because I can't. :)
Fermat's spiral (also known as a parabolic spiral) follows the equation r = \pm\theta^{1/2}\, in polar coordinates (the more general Fermat's spiral follows r 2 = a 2θ.) It is a type of Archimedean spiral. In disk phyllotaxis (sunflower, daisy), the mesh of spirals occurs in Fibonacci numbers because divergence (angle of succession in a single spiral arrangement) approaches the golden ratio. The shape of the spirals depends on the growth of the elements generated sequentially. In mature-disk phyllotaxis, when all the elements are the same size, the shape of the spirals is that of Fermat spirals—ideally. That is because Fermat's spiral traverses equal annuli in equal turns. The full model proposed by H Vogel in 1979 is r = c \sqrt{n}, \theta = n \times 137.508^\circ, where θ is the angle, r is the radius or distance from the center, and n is the index number of the floret and c is a constant scaling factor. The angle 137.508° is the golden angle which is approximated by ratios of Fibonacci numbers.
Customer Reviews
4.8 out of 5 stars rating14.1K Total Reviews
14,065 Reviews
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5 out of 5 stars rating
By Sharon S.July 31, 2025 • Verified Purchase
Print, Size: 36.00" x 25.10", Media: Value Poster Paper (Semi-Gloss)
I was so amazed at how this all turned out. Everyone who attended the funeral was in awe of how beautiful it was made.
And I owe it all to Zazzle. I wouldn’t have done it better myself not to mention I wouldnt have time to do it.
The great part of it all was they had templates that was catered to my needs and that I could use it in ways I wanted to use to resize it my way. It took some time but I was happy it turned out great. I did 100 photos, 89, 66 photos (I think) lol templates.
The only suggestion is that the templates, before sending through would tell you of errors like; saying please revise or resize it again for any photos that is not perfectly well sitting or not show it’s cutting off some of them and where it tells you there’s duplicates.
Staring, placing and resizing all 100 + pictures into the template can be tiresome and overwhelming and it makes my eyes blurred that I can’t tell if they’re cutting off or overlapping or duplicates.
Overall I am very pleased and will be using Zazzle again should the need arises.
Thank you Zazzle.
Altogether I’ve done 3 collages 1 profile picture and couple pictures with 1 frame and yet this is my first time ordering as a 1 time customer.
Prices were very reasonable and accommodating to my finances.
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5 out of 5 stars rating
By Peyton C.November 8, 2023 • Verified Purchase
Print, Size: 8.00" x 10.00", Media: Value Poster Paper (Semi-Gloss)
Zazzle Reviewer Program
The sign was beautiful and matched our theme. The paper was good quality. Excellent printing!!
5 out of 5 stars rating
By Marianne O.November 26, 2021 • Verified Purchase
Print, Size: 12.00" x 12.00", Media: Value Poster Paper (Semi-Gloss)
Creator Review
Fun bright artwork that really captures the mood I’m going for! Pop art with cyberpunk energy. A little sweet but also spicy. This art is the perfect size and vibe for our art gallery wall. The printing looks great, high quality with vibrant colors! I went with the semi-gloss finish, which adds a little extra shine and thickness to the print making it excellent for high-traffic areas like the staircase wall.
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Product ID: 228080898370359479
Created on: 6/6/2011, 2:14 AM
Rating: G
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