What type of pattern is this?

[LLAMASKYWALKER]

I found a pattern that when shot at by a ak94 correctly, it extends.
B3/S23
2$12bo7bo7b2o$12b3o5b3o5b2o$15bo7bo$14b2o6b2o16b2o$35b2o2bo2bo$35bobo
2b2o$25b2o11b2o$10bo12b2o4bo9bo$10b3o10b4o2bo9bob2o$13bo16bo5b2obo2bo
$12bo15bobo5b2ob2o$12b2obo12bobo$15b2o$26bobo$7b2obo15bobo5b2o$5bo2bo
b2o6bo15bo$5b2obo9bo16b3o$8bo28bo$8b2o$6b2o2bobo$5bo2bo2b2o$6b2o16b2o
8bo$24bo10bo$18b2o5b3o5b3o$18b2o7bo21$58bo$56bobo$57b2o21$81bo$82bo$80b
3o7$80b2o$80b2o3$87b2o$87b2o2$100b2o$99bo2bo$100b2o2$96bo$95bobo$95bo
bo$96bo2$110b2o$109bo2bo$110b2o2$106bo$105bobo$105bobo$106bo3$119b2o$
118bo2bo$119b2o2$115bo$114bobo$114bobo$115bo!

[LLAMASKYWALKER]

I'm going to call it "bee gun" for now

[Kazyan]

The growing part is called a crystal. Welcome!

[Ian07]

Welcome! That's known as a crystal, and you can use any glider gun with an even period of at least 82 to generate it:

Code: Select all

x = 158, y = 148, rule = B3/S23
41bo11b2o$40bobo10b2o$32bo3b2o2bobo$31bobo2bo2b2ob2o$17b2o12bobo3bobo$
18bo13bob4o2bob2o$18bobo13bo3bobob2o$19b2o12bo3bobo$32bo3bobo$23bo8b2o
3bo$5b2o16b2o24bo$5b2o14bo2b2o21bobo$20bo4bo18bo4bo$19bobo2b3o18b3o$
23b2ob2o17bo$24bo35b2o$23b3o33bo2bo$2o58b2obo$2o61bo$63b2o$20b2o26b2o
6b2o$19bo2b2o25bo6bobo$19b2ob2o22b3o7bo$20b3o10b2o11bo$33bo$34b3o$36bo
2$17bo44bo$18b2o41bobo$17b2o42bo2bo$63bo2$67b2o$47b2o17bo2bo$48bo17bob
o$48bobo16bo$38bo10b2o12b3o$36b3o24b2o$35bo$35b2o$20b2o48b2o$21bo48b2o
$21bob2o23b3ob3o$22bo2bo6b3o12b4obo2bo$23b2o6bo2bo11bobo$30bo3bo20bo$
30bo17b3o$30bo3bo14b2o2b2o$31bo2bo$32b3o$47bo3b2o$46bobo3bo$45bobo3bo$
41b2obobo3bo$41b2obo2b4obo5b2o$45bobo3bobo5bo$41b2ob2o2bo2bobo2b3o$42b
obo2b2o3bo3bo13bo$30b2o10bobo26bo$30b2o11bo25b3o54$116b2o$116b2o3$123b
2o$123b2o2$136b2o$135bo2bo$136b2o2$132bo$131bobo$131bobo$132bo2$146b2o
$145bo2bo$146b2o2$142bo$141bobo$141bobo$142bo3$155b2o$154bo2bo$155b2o
2$151bo$150bobo$150bobo$151bo!

P.S. if you place the RLE inside "code" tags, it'll automatically add a button to view it in a LifeViewer window.

[Hdjensofjfnen]

As others have said, this pattern is an example of a crystal — a pattern that periodically expands when a periodic glider stream on the same lane is fired into it.
This is perhaps the simplest and most well-known example of a crystal, because it works at an infinite number of even periods. Many other crystals do not, making them "grow" only with specific periods of glider streams.

[roolif]

... an example of a crystal — a pattern that periodically expands when a ( periodic ? ) glider stream on the same lane is fired into it.
This is perhaps the simplest and most well-known example of a crystal ...

I would like to find somewhere the lesser known examples of crystals, in B2/S23 life. So far, all what I've seen relied in the same reaction, in which a honeyfarm advances streamward 9.5 diags for every 11 gliders.

Code: Select all

x = 80, y = 80, rule = LifeHistory
#C [[ VIEWONLY NOGUI WIDTH 256 HEIGHT 256 ]]
$2.2B$2.2DB$2.B2DB$3.B2DB$4.B2DB$5.B2DB$6.B2DB$7.B2DA$8.B2DA$9.3AB$
10.B2DB$11.B2DB$12.B2DB$13.B2DB$14.B2DB$15.B2DB$16.B2DB$17.B2DB$18.B
2DB$19.B2DB$20.B2DB$21.B2DB$22.B2DB$23.B2DB5.B$24.B2DB3.BA3B$25.B2DB
2.ABA4B$26.B2D2BABA4B$26.2B2D2BA6B$27.2B2D8B$26.B2AB2D4B2AB$25.BA2BAB
2D2BA2BAB$26.B2A3B2D2B2A2B$25.8B2D5B$25.7BAB2D6B.5B$25.6BABAB2D13B$
25.6BABA2B2D14B$25.7BA4B2D14B$26.12B2D14B$26.13B2D14B$27.13B2D3B2A9B$
27.14B2DBA2BA8B$28.14B2DB2A8B$29.5B.8B2D8B$30.4B.6BA2B2D9B$31.2B3.4BA
BA2B2D10B$36.4BABA3B2D9B$38.3BA5B2D9B$41.7B2D8B$44.5B2D4B2AB$44.6B2D
2BA2BAB$45.6B2D2B2A2B$44.8B2D5B$44.7BAB2D6B.5B$44.6BABAB2D13B$44.6BAB
A2B2D14B$44.7BA4B2D14B$45.12B2D14B$45.13B2D14B$46.13B2D3B2A9B$46.14B
2DBA2BA8B$47.14B2DB2A8B$48.5B.8B2D8B$49.4B.6BA2B2D7B$50.2B3.4BABA2B2D
6B$55.4BABA3B2D6B$57.3BA5B2D5B$60.7B2D6B$63.5B2D4B2AB$63.6B2D2BA2BAB$
64.6B2D2B2AB$66.5B2D3B$68.2BAB2DB$68.BABABDB$69.ABA$69.BAB$70.B!

[LLAMASKYWALKER]

Just wondering... has this been found before?

[LLAMASKYWALKER]

nvm i found it on lifewiki
also i found it by shooting a soup

[Ian07]

Just wondering... has this been found before?

Yes, although I'm not sure who originally found it. Dean Hickerson already found a way to turn it into an oscillator in 1990. The crystal reaction essentially just consists of a block plus an arbitrary stream of gliders, so it definitely could have been found as early as the 1970s. Wasn't able to find it in Lifeline, however.

EDIT: P.S. you can edit your posts by clicking the pencil icon in the top right of the post. To avoid cluttering the forum, this is generally preferable to double-posting if the edits are in quick succession.

[Hdjensofjfnen]

I would like to find somewhere the lesser known examples of crystals, in B2/S23 life. So far, all what I've seen relied in the same reaction, in which a honeyfarm advances streamward 9.5 diags for every 11 gliders.

Sure! You can try to look for crystals by taking a glider stream of a given period and firing it into some debris. Here is a crystal that depends on a glider stream of period 14 and works at no other period:

Code: Select all

x = 94, y = 98, rule = B3/S23
91b2o$91b2o3$92bo$92b2o$91bobo2$88b2o$89b2o$88bo$85bo$85b2o$84bobo2$
81b2o$82b2o$81bo$78bo$78b2o$77bobo2$74b2o$75b2o$74bo$71bo$71b2o$70bobo
2$67b2o$68b2o$67bo$64bo$64b2o$63bobo2$60b2o$61b2o$60bo$57bo$57b2o$56bo
bo2$53b2o$54b2o$53bo$50bo$50b2o$49bobo2$46b2o$47b2o$46bo$43bo$43b2o$
42bobo2$39b2o$40b2o$39bo$36bo$36b2o$35bobo2$32b2o$33b2o$32bo$29bo$29b
2o$28bobo2$25b2o$26b2o$25bo$22bo$22b2o$21bobo2$18b2o$19b2o$18bo$15bo$
15b2o$14bobo2$11b2o$12b2o$11bo$8bo$8b2o$7bobo2$4b2o$5b2o$4bo$bo$b2o$ob
o!