Gunstar

A gunstar is any of a series of four-barreled glider guns of period 144 + 72n (n ≥ 0) that were constructed by David Buckingham in 1990 based on his transparent block reaction and Robert Wainwright's period 72 oscillator "two blockers hassling R-pentomino". Two copies of the oscillator together with a blocker and two eater 1s can duplicate a glider. One output glider emerges in the same direction as the original; the other is turned 90 degrees. By putting together 4 such reflectors, a 4-barrelled gun can be constructed.

Gunstar
<html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 265, y = 265, rule = B3/S23 65bo$64b2o$64bobo34$101bo$100b2o$100bobo20$98b2o$98b2o$98b2o$98bo$97bo bo$97bob2o$262b2o$104b2o157b2o$98b2o4b2o156bo$98b2o2$118bo26b2o$108b2o 8b3o24bo$108bobo10bo21bobo$108bo11b2o15bo5b2o4b2o$136b2o11b2o$109b2o 25bobo$105bo3bo2bo37bo$104bo2bob3o37bobo$104b3obo39bo2bo$98b2o5bob3o 37bo2bo$98b2o11bo$98b2o22b2o23bo2bo$99bo22b2o25b2o$98bobo$97b2obo12b3o $113bo$114bo$98b2o$98b2o57b3o2$131b2o20b3obo2bo$132bo7b2o9bob3o$129b3o 8b2o8bo6b3o$129bo20b2o2$153b2o$145b2o9b2o$145b2o7bobo$101b2o52bo25bo 19b2o$101b2o74b2o2b2ob3o10b2o4b4o$160b2o15b2o4b4o10b2o2b2ob3o$142b2o 15b3o19b2o18bo24b2o$101b3o34b2o2b2o2b2o10bobo2bo2b2o59b2o$102b2o34bobo 2bo2b2o10b2o2b2o2b2o58bo$99b2o38b3o20b2o$89bo9b3o38b2o45b2o9b2o$87bo3b o8bobo83b2obo8b2o$87bo3bo9b2o84bo$87bobobo3bo90bobo$95b2o89b2o4b3o$89b 2o6bo88bob3o3bo$89b2o3bobo91bobo2bo$89b2o3bo90bo2bo$189bo$76b2o12bobo 26bo60b2o$72b2obo2bob2o9b2o26bobo57bobo$72b2o2bo4bo37b2o60bo$77bo$78bo bo20b2o$69bo25b2o4b2o91b2o$69b3o23b2o52b3o42bo$72bo76bo42bobo$71b2o27b 3o47bo41b2o$100b2o81b2o$90b2o11b2o78b2o$90b2o10b3o$101bobo$74bo26b2o$ 72b2o$73b2o$172b2o$173bo$173bobo$89b2o83b2o$89bobo$91bo$91b2o$190b2o$ 191b2o$162b2o26bo$161bobo$160b3o10b2o$80b2o78b2o11b2o$80b2o81b2o$71b2o 41bo47b3o27b2o$70bobo42bo76bo$70bo42b3o52b2o23b3o$69b2o91b2o4b2o25bo$ 162b2o20bobo$187bo$83bo60b2o37bo4bo2b2o$83bobo57bobo26b2o9b2obo2bob2o$ 83b2o60bo26bobo12b2o$75bo$76bo2bo90bo3b2o$71bo2bobo91bobo3b2o$70bo3b3o bo88bo6b2o$70b3o4b2o89b2o$76bobo90bo3bobobo$77bo84b2o9bo3bo$65b2o8bob 2o83bobo8bo3bo$65b2o9b2o45b2o38b3o9bo$101b2o20b3o38b2o$38bo58b2o2b2o2b 2o10b2o2bo2bobo34b2o$36b2o59b2o2bo2bobo10b2o2b2o2b2o34b3o$37b2o24bo18b 2o19b3o15b2o$58b3ob2o2b2o10b4o4b2o15b2o$58b4o4b2o10b3ob2o2b2o74b2o$62b 2o19bo25bo52b2o$108bobo7b2o$107b2o9b2o$110b2o2$113b2o20bo$105b3o6bo8b 2o8b3o$109b3obo9b2o7bo$104bo2bob3o20b2o2$105b3o57b2o$165b2o$150bo$151b o$149b3o12bob2o$164bobo$114b2o25b2o22bo$114bo2bo23b2o22b2o$153bo11b2o$ 114bo2bo37b3obo5b2o$113bo2bo39bob3o$113bobo37b3obo2bo$114bo37bo2bo3bo$ 126bobo25b2o$114b2o11b2o$114b2o4b2o5bo15b2o11bo$119bobo21bo10bobo$119b o24b3o8b2o$118b2o26bo2$165b2o$2bo156b2o4b2o$2o157b2o$b2o$164b2obo$165b obo$166bo$165b2o$165b2o$165b2o20$162bobo$163b2o$163bo34$198bobo$199b2o $199bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] <nowiki>#C [[ GPS 24 ZOOM 2 LOOP 144 ]]</nowiki> <html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> <html></noscript></canvas></div></html>
View animated image
View static image
Pattern type Gun
Number of cells 736
Bounding box 149×149
Period 144
Barrels 4
Discovered by David Buckingham
Year of discovery 1990

The version to the right is the "first" such gun, with a period of 144. The next such gun, with a period of 216, is shown below.[1]

The period 216 gunstar
Download RLE: click here
gollark: Mostly miniature Linux distros.
gollark: There are a *few* OSes which run entirely in RAM.
gollark: OSes already do tons of in-memory caching.
gollark: As RAM expands so too does bloat.
gollark: Never, probably.

See also

References
  1. Alan Hensel's lifep.zip pattern collection.
This article is issued from Conwaylife. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.