Math for VSFX

Updated on March 1  2024

also Houdini Resources


 Overview (pictoral)


copyright © Deborah R. Fowler



Quilts

Deborah R. Fowler



Quilts - mathematical relationships and more

Posted June 25  2019


I recently came across this framed quilt in the Tucson Museum of Art. I thought it would be fun to try in Houdini and discovered both its mathematical principles as well as its organic structure that adds fascination.

The quilt in the picture below is by Carrie Marill and is titled "Sunburst Quilt" 2007.

MISSING IMAGE

Breaking down the pattern, it is an octagon design so I was confident I would be able to build one section and copy it around. Quickly prototyping it I came up with the Houdini equivalent.

MISSING TEXT
The key to the solution is to break it down to one modular piece, since it is an octagon 360/8 = 45 degrees.
MISSING
        IMAGE
Copying this piece and fusing the points to reduce redundancy we get the image below. (copy the single piece 8 times at 45 degrees). To more closely resemble the original, using four clip nodes.
If you prefer not to use copy stamp nodes, this can be easily implemented using point wrangle nodes:

MISSING
        IMAGE

Either method will work:
MISSING IMAGE
MISSING IMAGE

However I was disappointed at the very rigidly perfect result as compared with the original artwork. I began searching further into this pattern and found that it was originally created circa 1830s.
https://en.wikipedia.org/wiki/Rebecca_Scattergood_Savery
The one pictured on the website above as well as one on google search (unattributed pinterest)
do not have the same amount of stretching and are closer to the mathematically accurate version produced above.
MISSING
        IMAGE

However, to get closer to the original, which I assume has a more organic form due to the linen stretching or other structural imperfections that are appealing, I took my existing pattern and textured a grid that could be manipulated more easily.

MISSING IMAGE

And since we are in Houdini, fun to try spinning these (not likely something done with quilts)

MISSING GIFMISSING GIF


In addition to the sunburst pattern, there are many other patterns that are use in quilting.

Here are a few that are titled as follows: blocks, dutchman, flying geese and bow ties.

MISSING GIFMISSING GIFMISSING GIFMISSING GIF