Difference between revisions of "Caterpillar"
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The '''Caterpillar''' is the first [[17c/45 orthogonal | 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 | 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. | ||
{| | {| | ||
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|<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}} | ||
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==References== | ==References== | ||
<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== | ||
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[[Category:Non-monotonic_spaceships]] | [[Category:Non-monotonic_spaceships]] | ||
[[Category:Engineered spaceships]] | [[Category:Engineered spaceships]] | ||
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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