Space rake: Difference between revisions
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'''Space rake''' is a [[period]] 20 forward [[glider]] [[rake]] constructed | '''Space rake''' is a [[period]] 20 forward [[glider]] [[rake]] constructed no later than {{year|1971}},<ref>{{CiteLifeline|vol=3|pages=page 7}}</ref> probably by [[Bill Gosper]]; it was the first known rake. It consists of an [[ecologist]] with a [[lightweight spaceship]] added to turn its dying debris into gliders. | ||
Note that if the back lightweight spaceship is flipped vertically and moved down by one [[cell]], then this becomes a period 20 backward glider rake, as shown below.<ref>[[Alan Hensel]]'s [http://www.ibiblio.org/lifepatterns/ lifep.zip] pattern collection.</ref> | Note that if the back lightweight spaceship is flipped vertically and moved down by one [[cell]], then this becomes a period 20 backward glider rake, as shown below.<ref>[[Alan Hensel]]'s [http://www.ibiblio.org/lifepatterns/ lifep.zip] pattern collection.</ref> | ||
Revision as of 18:11, 6 March 2022
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| Pattern type | Rake Puffer | ||||||||
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| Number of cells | 65 | ||||||||
| Bounding box | 22 × 19 | ||||||||
| Direction | Orthogonal | ||||||||
| Period | 20 | ||||||||
| Speed | c/2 | ||||||||
| Discovered by | Unknown | ||||||||
| Year of discovery | Unknown | ||||||||
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Space rake is a period 20 forward glider rake constructed no later than 1971,[1] probably by Bill Gosper; it was the first known rake. It consists of an ecologist with a lightweight spaceship added to turn its dying debris into gliders.
Note that if the back lightweight spaceship is flipped vertically and moved down by one cell, then this becomes a period 20 backward glider rake, as shown below.[2]
Gallery
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References
- ↑ Robert Wainwright (September 1971). Lifeline, vol 3, page 7.
- ↑ Alan Hensel's lifep.zip pattern collection.
External links
- Space rake at the Life Lexicon