P. Goetschalckx, K. Coolsaet, N. Van Cleemput. “Generation of Local Symmetry-Preserving Operations” (2019). arXiv: 1908.11622.
decogen [-d] [-a] [-c 1|2|3] [-o OUTFILE] FACTOR
-d,--decocode write decocode to stdout or outfile
-a,--all generate decorations with smaller factors too
-c,--connectivity generate decorations with connectivity 1/2/3
-o,--output write to OUTFILE instead of stdout
FACTOR generate decorations with factor FACTOR (or smaller with -a)
The output is similar to planarcode.
It starts with the header >>deco_code<<, followed by a sequence of byte-encoded decorations.
Format: "{planarcode}{kind}{edge}{border}"
{planarcode}: planarcode of edges of type 1
{kind}: 1 byte, describing the situation in v1
0: the vertex has type 1, and degree 2
the edge on side 0 has type 0
1: vertex has type 1, and degree 2
the edge on side 0 has type 2
2: the vertex has type 2
3: the vertex has type 0
{edge}: 2 bytes, giving the vertices a and b
kind 0/1 kind 2/3
a *
| ` | `
*---b a---b
{border}: describes the types of edges on the border
direction: v1 -> v2 -> v0 -> v1
1: edge of type 1
2: two edges of type 0 or 2
0: v0/v1/v2
| truncate | chamfer |
|---|---|
 |
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