Difference between revisions of "Seed"
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A [[seed]] is a [[constellation]] that when triggered (normally hit by a [[glider]]) evolves into a target object, possibly with some extra junk. | A [[seed]] is a [[constellation]] that when triggered (normally hit by a [[glider]]) evolves into a target object, possibly with some extra junk. | ||
Seed constellations are commonly used in self-constructing circuitry. For example, to create a faraway target object to start construction of a new copy of a [[construction arm]] at a safe distance, it is often useful to use a seed for a complex spaceship or [[wickstretcher]] -- something that can be stopped when it reaches its destination by following it with a faster spaceship or [[wick]] [[burn]]ing reaction. | |||
One-glider seeds, or "1G seeds", are particularly useful in [[slow salvo]] construction because the constellation can be built up incrementally, with changes made one glider at a time. When it is complete it can be [[trigger]]ed by the final glider in the recipe. Triggering a seed will usually create several precisely synchronized gliders that then co-operate to construct the target object, similar to a standard [[glider synthesis]].<ref name="post100181" /> | |||
==Common one-glider seeds== | |||
Many common active regions have common objects that are one-glider seeds. Here is a list: | |||
* [[Traffic light]] (can be triggered from a [[blinker]], [[beehive]], [[loaf]], [[long boat]], or [[toad]]); | |||
* [[Honey farm]] (can be triggered from a [[block]], beehive, loaf, [[boat]], or toad); | |||
* [[Pi heptomino|Pi-seqeunce]] (can be triggered from a block, blinker, beehive, boat, [[ship]], [[pond]], toad, [[beacon]], or [[fishhook]]); | |||
* [[R-pentomino|R-sequence]] (can be triggered from a beehive, loaf, or toad); | |||
* [[B heptomino|B-sequence]] (can be triggered from a boat, toad, or beacon); | |||
* [[Century|Century sequence]] (can be triggered from a boat, toad, or beacon); | |||
* [[Block and glider|Wing sequence]] (can be triggered from a boat, ship, or beacon); | |||
* [[Blockade]] (can be triggered from a beehive); | |||
* [[Queen bee]] (can be triggered from a ship); | |||
* [[E-heptomino|E-sequence]] (can be triggered from a boat); | |||
* [[Blonk-tie|Blonk-tie sequence]] (can be triggered from a blinker or fishhook]] | |||
* [[Phi spark]] (can be triggered from a blinker or a boat) | |||
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The reason that so many objects are one-glider seeds for a pi-sequence is because when a glider hits a line of two cells in a still life in a certain way, the way that the glider reacts almost always produces a pentaplet grandparent of the pi-heptomino after four generations, as well as some cells behind it.<ref name="p105552" /> For a block, beehive, boat (in one orientation), ship (in one orientation), and pond, the excess cells turn out to be sparks, so a clean pi-sequence is produced. The only common one-glider seed for a pi-sequence that does not produce the pi-this way is a blinker, which does not actually produce a pi-heptomino but instead produces a twelve-cell cluster with the same great-grandchild (hence the term pi-''sequence'' rather than pi-''heptomino''). | |||
==Splitter-based== | |||
Many spaceships and some other difficult-to-construct objects have activation stages that require many gliders coming at once from multiple directions. For uses in self-constructing circuitry, simply firing all of the gliders at once in a synchronized manner is impractical. For this reason, for the activation stage, the activation stage uses a series of [[turner|turners and splitters]] that create all of the necessary synchronized gliders from only one initial glider that requires no synchronization. | |||
==See also== | ==See also== | ||
* [[Slow salvo]] | * [[Slow salvo]] | ||
* [[synthesis]] | * [[Glider synthesis]] | ||
* [[ List of one-glider seeds]] | |||
==References== | |||
<references> | |||
<ref name="post100181">{{LinkForumThread | |||
|format = ref | |||
|title = One Glider Seeds | |||
|p = 100181 | |||
|author = Goldtiger997 | |||
|date = July 7, 2020 | |||
}}</ref> | |||
<ref name="p105552">{{LinkForumThread | |||
|format = ref | |||
|title = One Glider Seeds | |||
|p = 105552 | |||
|author = Entity Valkyrie 2 | |||
|date = October 4, 2020 | |||
}}</ref> | |||
</references> | |||
==External links== | ==External links== | ||
{{LinkLexicon|lex_s.htm#seed}} | {{LinkLexicon|lex_s.htm#seed}} |
Revision as of 21:48, 27 March 2021
A seed is a constellation that when triggered (normally hit by a glider) evolves into a target object, possibly with some extra junk.
Seed constellations are commonly used in self-constructing circuitry. For example, to create a faraway target object to start construction of a new copy of a construction arm at a safe distance, it is often useful to use a seed for a complex spaceship or wickstretcher -- something that can be stopped when it reaches its destination by following it with a faster spaceship or wick burning reaction.
One-glider seeds, or "1G seeds", are particularly useful in slow salvo construction because the constellation can be built up incrementally, with changes made one glider at a time. When it is complete it can be triggered by the final glider in the recipe. Triggering a seed will usually create several precisely synchronized gliders that then co-operate to construct the target object, similar to a standard glider synthesis.[1]
Common one-glider seeds
Many common active regions have common objects that are one-glider seeds. Here is a list:
- Traffic light (can be triggered from a blinker, beehive, loaf, long boat, or toad);
- Honey farm (can be triggered from a block, beehive, loaf, boat, or toad);
- Pi-seqeunce (can be triggered from a block, blinker, beehive, boat, ship, pond, toad, beacon, or fishhook);
- R-sequence (can be triggered from a beehive, loaf, or toad);
- B-sequence (can be triggered from a boat, toad, or beacon);
- Century sequence (can be triggered from a boat, toad, or beacon);
- Wing sequence (can be triggered from a boat, ship, or beacon);
- Blockade (can be triggered from a beehive);
- Queen bee (can be triggered from a ship);
- E-sequence (can be triggered from a boat);
- Blonk-tie sequence (can be triggered from a blinker or fishhook]]
- Phi spark (can be triggered from a blinker or a boat)
The reason that so many objects are one-glider seeds for a pi-sequence is because when a glider hits a line of two cells in a still life in a certain way, the way that the glider reacts almost always produces a pentaplet grandparent of the pi-heptomino after four generations, as well as some cells behind it.[2] For a block, beehive, boat (in one orientation), ship (in one orientation), and pond, the excess cells turn out to be sparks, so a clean pi-sequence is produced. The only common one-glider seed for a pi-sequence that does not produce the pi-this way is a blinker, which does not actually produce a pi-heptomino but instead produces a twelve-cell cluster with the same great-grandchild (hence the term pi-sequence rather than pi-heptomino).
Splitter-based
Many spaceships and some other difficult-to-construct objects have activation stages that require many gliders coming at once from multiple directions. For uses in self-constructing circuitry, simply firing all of the gliders at once in a synchronized manner is impractical. For this reason, for the activation stage, the activation stage uses a series of turners and splitters that create all of the necessary synchronized gliders from only one initial glider that requires no synchronization.
See also
References
- ↑ Goldtiger997 (July 7, 2020). One Glider Seeds (discussion thread) at the ConwayLife.com forums
- ↑ Entity Valkyrie 2 (October 4, 2020). One Glider Seeds (discussion thread) at the ConwayLife.com forums
External links
- Seed at the Life Lexicon