Difference between revisions of "Caterpillar"
m (I might be wrong. Were there bigger things?) 
m (The previous wording was safer... "largest interesting" depends on how you classify the Quest for Tetris project, and also on whether you're measuring length or population.) 

Line 24:  Line 24:  
The '''Caterpillar''' is the first [[17c/45 orthogonal17c/45]] [[spaceship]] that was constructed, and is the first crawlerbased [[Spaceship#Engineered spaceshipsengineered spaceship]], making use of the [[17c/45 reaction]]. It was created via a combination of manuallyconstructed parts put together by [[:Category:Patterns found by David BellDavid Bell]], [[:Category:Patterns found by Jason SummersJason Summers]] and [[:Category:Patterns found by Gabriel NivaschGabriel Nivasch]] and a computeraided construction coded by Nivasch. The Caterpillar's construction took place over a long period of time, but it was completed on December 31, [[:Category:Patterns found in 20042004]]. It has 11,880,063 cells; this, however, can be reduced to 11,880,039 cells through trivial modification.<ref>{{cite weburl=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1258&start=75#p32418title=Re: Caterpillar's little brother researchauthor=Dave Greenedate=28 June 2016accessdate=2 July 2016}}</ref>  The '''Caterpillar''' is the first [[17c/45 orthogonal17c/45]] [[spaceship]] that was constructed, and is the first crawlerbased [[Spaceship#Engineered spaceshipsengineered spaceship]], making use of the [[17c/45 reaction]]. It was created via a combination of manuallyconstructed parts put together by [[:Category:Patterns found by David BellDavid Bell]], [[:Category:Patterns found by Jason SummersJason Summers]] and [[:Category:Patterns found by Gabriel NivaschGabriel Nivasch]] and a computeraided construction coded by Nivasch. The Caterpillar's construction took place over a long period of time, but it was completed on December 31, [[:Category:Patterns found in 20042004]]. It has 11,880,063 cells; this, however, can be reduced to 11,880,039 cells through trivial modification.<ref>{{cite weburl=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1258&start=75#p32418title=Re: Caterpillar's little brother researchauthor=Dave Greenedate=28 June 2016accessdate=2 July 2016}}</ref>  
−  Caterpillar was, in terms of its minimum 11,880,063 alive [[cell]]s, one of the largest patterns constructed in [[Conway's Game of LifeLife]] up to that point  +  Caterpillar was, in terms of its minimum 11,880,063 alive [[cell]]s, one of the largest patterns constructed in [[Conway's Game of LifeLife]] up to that point. The image to the right is zoomed out to a scale of 32 [[cell]]s per pixel and still only shows 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 orthogonal speed with a known spaceship. 
==Gallery==  ==Gallery== 
Revision as of 14:47, 3 July 2019
Caterpillar  
View static image  
Pattern type  Spaceship  

Number of cells  11880063  
Bounding box  4195×330721  
Direction  Orthogonal  
Period  270  
Mod  270  
Speed  17c/45  
Speed (unsimplified)  102c/270  
Heat  12114897.5  
Discovered by  Gabriel Nivasch David Bell Jason Summers  
Year of discovery  2004  
 
 

The Caterpillar is the first 17c/45 spaceship that was constructed, and is the first crawlerbased engineered spaceship, making use of the 17c/45 reaction. It was created via a combination of manuallyconstructed parts put together by David Bell, Jason Summers and Gabriel Nivasch and a computeraided construction coded by Nivasch. The Caterpillar's construction took place over a long period of time, but it was completed on December 31, 2004. It has 11,880,063 cells; this, however, can be reduced to 11,880,039 cells through trivial modification.^{[1]}
Caterpillar was, in terms of its minimum 11,880,063 alive cells, one of the largest patterns constructed in Life up to that point. The image to the right is zoomed out to a scale of 32 cells per pixel and still only shows 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 orthogonal speed with a known spaceship.
Gallery
Videos
See also
References
 ↑ Dave Greene (28 June 2016). "Re: Caterpillar's little brother research". Retrieved on 2 July 2016.
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
 Periodic objects with minimum population 1000 or more
 Patterns with 1000 or more cells
 Patterns found by Gabriel Nivasch
 Patterns found by David Bell
 Patterns found by Jason Summers
 Patterns found in 2004
 Spaceships
 Spaceships with period 270
 Orthogonal spaceships
 Spaceships with speed 17c/45
 Spaceships with unsimplified speed 102c/270
 Spaceships with heat 12114897
 Spaceships with mod 270
 Nonmonotonic spaceships
 Engineered spaceships