Space rake: Difference between revisions

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{{Puffer|type=Rake|p=20|s=c/2|bx=22|by=19|name=Space rake|dir=Orthogonal|pname=spacerake|c=65|life105=true|life106=true|plaintext=true|rle=true|animated=true}}
{{Puffer
'''Space rake''' is a [[period]] 20 forward [[glider]] [[rake]] constructed around 1971 and was the first known rake. It consists of an [[ecologist]] with a [[lightweight spaceship]] added to turn its dying debris into gliders.
|name        = Space rake
|pname        = spacerake
|type        = Rake
|c           = 65
|bx           = 22
|by           = 19
|dir         = Orthogonal
|p            = 20
|s            = c/2
|rulemin      = B3/S23
|rulemax      = B38/S238
|rulespecial  = [[Conway's Game of Life|Conway Life]]
|isorulemin  = B3-k/S23-y
|isorulemax  = B34e5ck6cn8/S234ce5ekr6i8
|plaintext   = true
|rle         = true
|animated     = true
|viewerconfig = #C [[ HEIGHT 380 WIDTH 600 THUMBSIZE 2 ZOOM 14 AUTOSTART OFF ]]
}}
'''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>
 
{{EmbedViewer
|pname        = backwardspacerake
|viewerconfig = #C [[ HEIGHT 380 WIDTH 600 THUMBSIZE 2 ZOOM 14 ]]
|position    = center
|caption      = The backward version of the space rake
|style        = width:300px;
}}
 
==References==
<references />


==External links==
==External links==
{{LinkWeisstein|SpaceRake.html}}
* {{LinkLexicon|lex_s.htm#spacerake}}
{{LinkLexicon|lex_s.htm#spacerake}}

Latest revision as of 04:46, 20 May 2023

Space rake
x = 22, y = 19, rule = B3/S23 11b2o5b4o$9b2ob2o3bo3bo$9b4o8bo$10b2o5bo2bo2$8bo$7b2o8b2o$6bo9bo2bo$7b 5o4bo2bo$8b4o3b2ob2o$11bo4b2o4$18b4o$o2bo13bo3bo$4bo16bo$o3bo12bo2bo$b 4o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ HEIGHT 380 WIDTH 600 THUMBSIZE 2 ZOOM 14 AUTOSTART OFF ]]
View animated image
View static image
Pattern type Rake
Puffer
Number of cells 65
Bounding box 22 × 19
Direction Orthogonal
Period 20
Speed c/2
Discovered by Unknown
Year of discovery Unknown

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]

x = 23, y = 20, rule = b3/s23 12b2o5b4o$10b2ob2o3bo3bo$10b4o8bo$11b2o5bo2bob2$9bo13b$8b2o8b2o3b$7bo 9bo2bo2b$8b5o4bo2bo2b$9b4o3b2ob2o2b$12bo4b2o4b4$19b4o$18bo3bo$b4o17bo$ o3bo13bo2bob$4bo18b$o2bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ HEIGHT 380 WIDTH 600 THUMBSIZE 2 ZOOM 14 ]]
The backward version of the space rake
(click above to open LifeViewer)
RLE: here Plaintext: here

References

  1. ↑ Robert Wainwright (September 1971). Lifeline, vol 3, page 7.
  2. ↑ Alan Hensel's lifep.zip pattern collection.
Retrieved from "https://conwaylife.com/w/index.php?title=Space_rake&oldid=131226"