The nine block is a common design pattern among quilters. It's construction
methods and primitive building shapes are simple, yet produce millions
of interesting variations.
four 9 block patterns, arbitrarily assembled, show the grid
composition of the block
Each block is composed
of 9 squares, arranged in a 3 x 3 grid. Each square is composed
of one of 16 primitive shapes. Shapes are arranged such that
the block is radially symmetric. Color is modified and assigned
arbitrarily to each new block.
The basic building blocks of the nine block are limited to 16 unique
geometric shapes. Each shape is allowed to rotate in 90 degree increments.
Only 4 shapes are allowed in the center position to maintain radial
the 16 possible shapes allowed for each grid space. The 4 shapes allowed
in the center have bold numbers.
C. an expanded set of 144 unique 9
blocks generated in 13ms
This has got to be one of my favorite permutations simply because
of the astonishing results for a very simple set of rules and primitives.
If each generated nine block was a physical tile 1" in height
and width, I'd have an overflowing cart of them at the bazaar, downtown,
some four thousand tightly packed 9 blocks
Many thanks to Karen's Creative
Fabrics in Las Cruces, New Mexico for providing the methodology
of the nine block quilt.