Difference between revisions of "OCA:Seeds"
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===Oscillators=== | ===Oscillators=== | ||
It is obvious that no still lifes exist in this rule. Known oscillator periods include 2, 3, 4, and 6. The five smallest ones are [[ | It is obvious that no still lifes exist in this rule. Known oscillator periods include 2, 3, 4, and 6. The five smallest ones are [[duoplet]] (2 cells, p2), [[shiplet]] (3 cells, p2), [[radar]] (4 cells, p4), [[lever]] (4 cells, p4) and [[anchor]] (4 cells, p4). | ||
<!--Osc names from the Live Free or Die webpages except "shiplet", coined just now for its ship-like hull.--> | <!--Osc names from the Live Free or Die webpages except "shiplet", coined just now for its ship-like hull.--> | ||
Revision as of 00:35, 4 March 2016
| seeds | |
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| Rulestring | /2 B2/S |
|---|---|
| Character | Explosive |
Seeds is a life-like cellular automaton in which only dead cells with exactly two live neighbors will turn into live cells on the next generation. Even though all the living cells are die in every generation (turning every pattern into a phoenix), most of the patterns are still exploding quadratically.
Notable patterns
Oscillators
It is obvious that no still lifes exist in this rule. Known oscillator periods include 2, 3, 4, and 6. The five smallest ones are duoplet (2 cells, p2), shiplet (3 cells, p2), radar (4 cells, p4), lever (4 cells, p4) and anchor (4 cells, p4).
Spaceships
With b2, the Seeds rule allows spaceships to travel at the speed of light. The three smallest ones, known as photons, have a period of 1 and consist of only 4 cells each. Larger lightspeed spaceships with higher periods are also known.
There also exist c/2 and c/5 orthogonal spaceships and c/3 and c/4 diagonal spaceships.
Known spaceships for the Seeds rule
Guns
Two period-4 photon guns (lasers?) have been found, yet their photon stream is too dense to implement any signal logic.
Puffers, Rakes and Breeders
Quite a lot of progress has been made in producing engineered patterns consisting of lightspeed puffers and photon rakes. A rake puffer breeder is known.
External links
- A collection of patterns for the Seeds rule collected by Jason Summers includes patterns found by Stephen Wright, Mirek Wójtowicz, Noam Elkies, Mark Niemiec, Peter Naszvadi, and David Eppstein.
- Seeds at Wikipedia