Crochetable Cyclic Tag

A tool for generating and evaluating Turing-complete crochet patterns based on Emil Post's tag system computational model, and the esoteric programming language Bitwise Cyclic Tag.

Usage examples

Help:

./cct.py -h

Convert

Convert BCT to CCT:

./cct.py --bct "10 11 10 10 10 11 0 11 10 10 0 11 10 10 11 10 10 11 10 10 0 0 0 0" -t "Collatz Sequence"

Convert CT to CCT:

./cct.py --ct "010001;100;100100100;;;;" -t "Collatz Sequence"

Convert CCT to human followable crochet instructions for computaion-by-crochet (--verbose):

./cct.py examples/collatz.cct --verbose

Evaluate

Evaluate CCT to crochet pattern symbols (Unicode to STDOUT):

./cct.py examples/collatz.cct

Evaluate CCT to SVG crochet pattern:

./cct.py --svg examples/collatz.cct

Output example

CCT code

simple-triangle.cct:

# Simple decreasing triangle swatch
1. Any sequence of sc / dc stitched onto an appropriately sized foundation chain.
2. std
3. dec-ss
4. std
Repeat from Row 3.

Produced with ./cct.py --ct ";" --title "Simple decreasing triangle swatch"

Verbose instructions

./cct.py examples/simple-triangle.cct --verbose

Simple decreasing triangle swatch

Row 1 Any sequence of sc / dc stitched onto an appropriately sized foundation chain. Row 2 (std) work 1 sc into each dc, 1 dc into each sc until end of row; turn. Row 3 (dec-ss) 1 ss, then proceed as in the standard row until end of row; turn. Row 4 (std) work 1 sc into each dc, 1 dc into each sc until end of row; turn. Repeat from Row 3.

Evaluation of input

0: single crochet, 1: double crochet (US crochet terminology)

./cct.py examples/simple-triangle.cct -i 111111

•     
+     
Ŧ•    
++    
ŦŦ•   
+++   
ŦŦŦ•  
++++  
ŦŦŦŦ• 
+++++ 
ŦŦŦŦŦ•
++++++
ŦŦŦŦŦŦ
ᴑᴑᴑᴑᴑᴑ

A different input produces different output:

./cct.py examples/simple-triangle.cct -i 1011101

•      
+      
Ŧ•     
+Ŧ     
Ŧ+•    
+Ŧ+    
Ŧ+Ŧ•   
+Ŧ++   
Ŧ+ŦŦ•  
+Ŧ+++  
Ŧ+ŦŦŦ• 
+Ŧ+++Ŧ 
Ŧ+ŦŦŦ+•
+Ŧ+++Ŧ+
Ŧ+ŦŦŦ+Ŧ
ᴑᴑᴑᴑᴑᴑᴑ

SVG output

./cct.py examples/simple-triangle.cct -i 1011101 --svg