Difference between revisions of "Caterpillar"
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{{Spaceship | {{Spaceship | ||
|name=Caterpillar|pname=caterpillar | |name = Caterpillar | ||
|bx=4195|by=330721 | |pname = caterpillar | ||
|dir=Orthogonal|p=270|s=17c/45| | |c = 11880063 | ||
|discoverer=Gabriel Nivasch| | |bx = 4195 | ||
| | |by = 330721 | ||
|rulemin=B3/S23|rulemax=B3/S23|rulespecial=[[Conway's Game of Life|Conway Life]] | |dir = Orthogonal | ||
|p = 270 | |||
|m = 270 | |||
|s = 17c/45 | |||
|z = 102c/270 | |||
|h = 12114897.5 | |||
|discoverer = Gabriel Nivasch | |||
|discoverer2 = David Bell | |||
|discoverer3 = Jason Summers | |||
|discoveryear = 2004 | |||
|rulemin = B3/S23 | |||
|rulemax = B3/S23 | |||
|rulespecial = [[Conway's Game of Life|Conway Life]] | |||
|mc = true | |||
|zip = true | |||
|eppsteinid = 1 | |||
}} | }} | ||
The '''Caterpillar''' is the first (and currently only) [[17c/45 orthogonal]] [[spaceship]] to be constructed, and is the first [[engineered spaceship]] based on a [[crawler]], [[17c/45 reaction]]. It was created via a combination of manually-constructed parts put together by [[David Bell]], [[Jason Summers]] and [[Gabriel Nivasch]] and a computer-aided construction coded by Nivasch. The Caterpillar's construction cost lots of time before completion on December 31, {{year|2004}}. | |||
Caterpillar has 11,880,063 [[cell]]s which can be reduced to 11,880,039 cells trivially.<ref name="post32418" /> In terms of [[population]], it was one of the largest patterns constructed in [[Game of Life]] up to that point. The image to the right is zoomed out to a scale of 32 cells per pixel, showing only the top 3% of it. Encoded as an [[RLE]] file, it is over 29MB in size. Despite this, it moves at the speed of 17c/45, which is the fourth fastest known orthogonal speed explicitly. | |||
{| | {| | ||
|- | |- | ||
|<gallery>File:cat_picture01.png|thumb|left|Full view of caterpillar, 40 cells/pixel (click to view)</gallery> | |||
|{{#ev:youtube|f2dETmyeiK0|300|left|Various zoom levels of caterpillar demonstrating its size}} | |{{#ev:youtube|f2dETmyeiK0|300|left|Various zoom levels of caterpillar demonstrating its size}} | ||
|} | |} | ||
==See also== | ==See also== | ||
*[[ | *[[Centipede]] | ||
==References== | |||
<references> | |||
<ref name="post32418">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Caterpillar's little brother research | |||
|p = 32418 | |||
|author = Dave Greene | |||
|date = June 28, 2016 | |||
}}</ref> | |||
</references> | |||
==External links== | ==External links== | ||
{{LinkLexicon|lex_c.htm#caterpillar}} | |||
*{{cite web | *{{cite web | ||
|url=http://www. | |url=http://www.gabrielnivasch.org/fun/life/caterpillar | ||
|title=The 17c/45 Caterpillar spaceship | |title=The 17c/45 Caterpillar spaceship | ||
|work=Gabriel Nivasch's Life page | |work=Gabriel Nivasch's Life page | ||
|date=January 2005 | |date=January 2005 | ||
}} A "brief overview" of how | }} A "brief overview" of how the Caterpillar works (with illustrations and RLE files of parts), the pattern in RLE format, plus complete C++ & RLE sources for assembling it. | ||
*{{cite web | *{{cite web | ||
|url=http://home.mieweb.com/jsfiles/life/17c45/ | |url=https://web.archive.org/web/20140224174407/http://home.mieweb.com/jsfiles/life/17c45/ | ||
|title=17c/45 "Caterpillar" spaceship | |title=17c/45 "Caterpillar" spaceship | ||
|work=Jason Summer's Life page | |work=Jason Summer's Life page | ||
}} A short summary of what | }} A short summary of what the Caterpillar is with a few pictures, plus the pattern in RLE and .mc (macrocell) formats. Golly loads the macrocell file '''much''' more quickly than the RLE. | ||
{{LinkEppstein|1|patternname=The Caterpillar (glider 1)}} | |||
[[Category:Non-monotonic_spaceships]] | [[Category:Non-monotonic_spaceships]] | ||
[[Category:Engineered spaceships]] | |||
__NOTOC__ |
Revision as of 15:50, 15 May 2020
Caterpillar | |||||||
View static image | |||||||
Pattern type | Spaceship | ||||||
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Number of cells | 11880063 | ||||||
Bounding box | 4195 × 330721 | ||||||
Direction | Orthogonal | ||||||
Period | 270 | ||||||
Mod | 270 | ||||||
Speed | 17c/45 | 102c/270 | ||||||
Heat | 12114897.5 | ||||||
Discovered by | Gabriel Nivasch David Bell Jason Summers | ||||||
Year of discovery | 2004 | ||||||
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The Caterpillar is the first (and currently only) 17c/45 orthogonal spaceship to be constructed, and is the first engineered spaceship based on a crawler, 17c/45 reaction. It was created via a combination of manually-constructed parts put together by David Bell, Jason Summers and Gabriel Nivasch and a computer-aided construction coded by Nivasch. The Caterpillar's construction cost lots of time before completion on December 31, 2004.
Caterpillar has 11,880,063 cells which can be reduced to 11,880,039 cells trivially.[1] In terms of population, it was one of the largest patterns constructed in Game of Life up to that point. The image to the right is zoomed out to a scale of 32 cells per pixel, showing only the top 3% of it. Encoded as an RLE file, it is over 29MB in size. Despite this, it moves at the speed of 17c/45, which is the fourth fastest known orthogonal speed explicitly.
See also
References
- ↑ Dave Greene (June 28, 2016). Re: Caterpillar's little brother research (discussion thread) at the ConwayLife.com forums
External links
- Caterpillar at the Life Lexicon
- "The 17c/45 Caterpillar spaceship". Gabriel Nivasch's Life page (January 2005). A "brief overview" of how the Caterpillar works (with illustrations and RLE files of parts), the pattern in RLE format, plus complete C++ & RLE sources for assembling it.
- "17c/45 "Caterpillar" spaceship". Jason Summer's Life page. A short summary of what the Caterpillar is with a few pictures, plus the pattern in RLE and .mc (macrocell) formats. Golly loads the macrocell file much more quickly than the RLE.
- The Caterpillar (glider 1) at David Eppstein's Glider Database
- Patterns
- Spaceships with between 10,000,000 and 99,999,999 cells
- Periodic objects with minimum population between 10,000,000 and 99,999,999
- Patterns with between 10,000,000 and 99,999,999 cells
- Patterns found by Gabriel Nivasch
- Patterns found by David Bell
- Patterns found by Jason Summers
- Patterns found in 2004
- Outer-totalistically endemic patterns
- Spaceships
- Spaceships with period 270
- Orthogonal spaceships
- Spaceships with speed 17c/45
- Spaceships with unsimplified speed 102c/270
- Spaceships with heat between 10,000,000 and 99,999,999
- Spaceships with mod 270
- Non-monotonic spaceships
- Engineered spaceships