Grin
Grin is a common parent of the block. Its name derives from the Cheshire cat, an 18-cell six-tick grin predecessor created by C. R. Tompkins that appeared unaccountably both in Scientific American and in Winning Ways.
| <html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 6, y = 6, rule = B3/S23
bo2bo$b4o$o4bo$ob2obo$o4bo$b4o!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ AUTOSTART THUMBSIZE 2 GPS 4 PAUSE 1 LOOP 15 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> Please enable Javascript to view this LifeViewer. <html></noscript></canvas></div></html> |
| Cheshire cat, leaving a block as its pawprint (click above to open LifeViewer) RLE: here Plaintext: here |
| Grin | |||
| |||
| View static image | |||
| Pattern type | Miscellaneous | ||
|---|---|---|---|
| Number of cells | 4 | ||
| Bounding box | 4×2 | ||
| Discovered by | Unknown | ||
| Year of discovery | 1970 | ||
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| |||
In other rules
Moon moving
Grin is a common lightspeed spaceship in many Life-like cellular automata, for example Seeds and Live Free or Die. It is the third most common spaceship in the former, where it is known as moon. In isotropic non-totalistic cellular automata, it works from B2ae/S to B23-j45678/S01e2-k345678.
The pattern also appears as a c/2 orthogonal spaceship in some B0 rules,[which?] interestingly keeping the same appearance in all phases.
gollark: Ale won't admit it, but it's true*.
gollark: Ale32bit is STILL GAY!
gollark: ||PotaToS = PotatOS Terms of Service||
gollark: It's resistant to crashy bugs.
gollark: You should use Discord via the potatOS client.
See also
External links
- Grin at the Life Lexicon
- Cheshire cat at the Life Lexicon
- Moon at David Eppstein's Glider Database
- Moon (rule b2s) at Adam P. Goucher's Catagolue
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