Mamluk Koran

// Mamluk Koran Page 88 - 98 of Islamic Geometric Patters
// Thames & Hudson by Eric Broug
// ISBN 978-0-500-28721-7
// ISBN 10: 050028721XISBN 13: 9780500287217
// code by Rupert Russell February 2022

Code on github at: https://github.com/rupertrussell/mamluk_quran

https://www.bl.uk/manuscripts/Viewer.aspx?ref=or_848_fs001r

Outer Square Point Numbers

Thanks to Greg Gamble for answring my question about how to rearange The extrapolation equation to solve for x.

Steps below

First Step mamluk_koran_003

added function to extrapolate a y value from 2 points
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if you have an answer feel free to email me

I can extrapolate point 3
using
y = y1 + m · (x – x1)

from points 1 & 2

But I need to rearrange the formula
to extrapolate point 5 using Points 1 & 4
I know the y value for point 5
but I need to calculate the x value

Thanks to Greg Gamble for this answer!

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This is what I am working towards

This is what I have produced