These SVG templates are modelled after Eric Broug‘s drawing templates for Islamic Geometric Design pattern elements. Although written for Inkscape, they should be usable with almost any graphics program.
By enabling snapping to nodes and object centres, your drawing program can act like an accurate straight edge and compass for constructing geometric figures.
The files are name N-LL-S.svg, where:
N — is the root symmetry: 4-fold, 5-fold, 6-fold, etc.
LL — the total number of lines arranged evenly around the circle. This will always be a multiple of N.
S — If the total number of lines has another symmetry that is a factor, this is S. If S = 0, then only the root symmetry is marked.
4-12-6.svg — base symmetry 4-fold (square/diamond), with 12 lines or 30° spacing. Hexagonal (6-fold) guidelines are highlighted in a different colour.
5-10-0.svg — base symmetry 5-fold (pentagonal), with 10 lines or 36° spacing. No other guidelines are highlighted.
In Inkscape 0.91:
units set to mm
snapping set to cusp nodes, intersections, and object rotation centres
construction lines on a separate layer (‘construction’) from the active layer (‘drawing’)
Summary: Buy the paper edition; this book is illegible on Kindle.
The original book features very finely engraved line drawings, with construction lines showing how the patterns are built up. The Kindle edition has only low-resolution scans, so the lines break down into noise and are very hard to follow. You can’t zoom in, either. The figure numbering is entirely absent from the Kindle edition, so you can’t use this book for reference. Some of the page scans are squint and partially cut off, too.
Very disappointed in this purchase. You’re better off with the paper than trying to squint at these smudgy pixels.
(unedited text as simultaneously posted to Amazon)
I’d been having no luck getting the SD card working on my Zeta. I got help on the mailing list, and uploaded a new 512KB Flash ROM image (via XMODEM and floppy; teh slow!). So now I have two multi-megabyte drives on my CP/M computer — whee!