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DroneBetter (talk | contribs) Add Charity's p16 and 51P384 to list, reduce p160 gun shown to current smallest one (less distracting and demonstrating use of Charity's p16), decrease embed size and zoom in upon it (look at gun_160 on Catagolue for a whimsical surprise) |
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Filters can be used to make guns of high periods. For instance, the [[period-20 glider gun]] can be made p40 with a blocker, then p80 with [[Rich's p16]], and even p160 with [[68P32.1]]: | Filters can be used to make guns of high periods. For instance, the [[period-20 glider gun]] can be made p40 with a blocker, then p80 with [[Rich's p16]], and even p160 with [[68P32.1]]: | ||
{{EmbedViewer | |||
|pname = p160gun | |||
|viewerconfig = #C [[ MAXGRIDSIZE 9 WIDTH 800 HEIGHT 700 THUMBSIZE 2 ZOOM 8 GPS 20 AUTOSTART KILLGLIDERS ]] | |||
|position = center | |||
|caption = p160 glider gun | |||
|style = width:300px; | |||
}} | |||
A smaller, more recent period-160 glider gun uses [[Charity's p16]] as the first filter instead: | |||
{{EmbedViewer | {{EmbedViewer | ||
|rle = x = 48, y = 33, rule = B3/S23 | |rle = x = 48, y = 33, rule = B3/S23 | ||
20b3o2b2o$14b2o8bobo$14bo10bo$4b2ob3ob2obo8b2o$4bo4bo3bo5b2ob2o$5b3o10bo4bo$8bo10bo4bo$5b3o3bo7bo3b2o$5bo2b2o3b3o4bo$6bo5bobo2bo2b2o$3b3o6bo11bo$3bo8bobobobo4bobo9bo3bo$13b2obobo5bo9bobobobo$15b3o9bob3ob2obobob2ob3obo$27bo2b2obobo3bobob2o2bo$31bobo7bobo2$7b2o11b2o$6bobo11bobo$6bo15bo$5b2o9bo5b2o$10bo6bo$2bo6bobo3b3o$bobo6bo$o3bo$bo3bo7bo17bobo7bobo$2bo3bo5bobo12bo2b2obobo3bobob2o2bo$3bo3bo2b2o2b2o11bob3ob2obobob2ob3obo$4bobo3b2ob2o19bobobobo$5bo3b2ob3o20bo3bo$9b3o14bo$10bobo14bo$11b2o12b3o! | 20b3o2b2o$14b2o8bobo$14bo10bo$4b2ob3ob2obo8b2o$4bo4bo3bo5b2ob2o$5b3o10bo4bo$8bo10bo4bo$5b3o3bo7bo3b2o$5bo2b2o3b3o4bo$6bo5bobo2bo2b2o$3b3o6bo11bo$3bo8bobobobo4bobo9bo3bo$13b2obobo5bo9bobobobo$15b3o9bob3ob2obobob2ob3obo$27bo2b2obobo3bobob2o2bo$31bobo7bobo2$7b2o11b2o$6bobo11bobo$6bo15bo$5b2o9bo5b2o$10bo6bo$2bo6bobo3b3o$bobo6bo$o3bo$bo3bo7bo17bobo7bobo$2bo3bo5bobo12bo2b2obobo3bobob2o2bo$3bo3bo2b2o2b2o11bob3ob2obobob2ob3obo$4bobo3b2ob2o19bobobobo$5bo3b2ob3o20bo3bo$9b3o14bo$10bobo14bo$11b2o12b3o! | ||
|viewerconfig = #C [[ MAXGRIDSIZE 9 WIDTH 700 HEIGHT 500 THUMBSIZE 2 ZOOM 12 GPS | |viewerconfig = #C [[ MAXGRIDSIZE 9 WIDTH 700 HEIGHT 500 THUMBSIZE 2 ZOOM 12 GPS 16 THEME Book AUTOSTART KILLGLIDERS ]] | ||
|position = center | |position = center | ||
|caption = p160 glider gun | |caption = p160 glider gun | ||
|style = width:300px; | |style = width:300px; | ||
|apgcode = gun_160 | |||
}} | }} | ||
==List of filters== | ==List of filters== | ||
* Multiple of 4 but not 8, ×2: [[Blocker]] | * Multiple of 4 but not 8, ×2: [[Blocker]] | ||
* Multiple of 8 but not 16, ×2: [[Rich's p16]], [[Charity's p16]] | * Multiple of 8 but not 16, ×2: [[Rich's p16]],<ref group="n">This also applies to filtering LWSS's and MWSS's (of the same phase but with frontends extended forwards by one cell), as shown in the [[RLE:P48lwss|p48 LWSS gun]]</ref> [[Charity's p16]] | ||
* Multiple of 16 but not 32, ×2: [[68P32]] | * Multiple of 16 but not 32, ×2: [[68P32]] | ||
* Multiple of 32 but not 64, ×2: [[51P384]]<ref name="post160020" /> | * Multiple of 32 but not 64, ×2: [[51P384]]<ref name="post160020" /> | ||
* Multiple of 5 but not 10, ×2: [[p10 filter]] | * Multiple of 5 but not 10, ×2: [[p10 filter]] | ||
* Multiple of 5 but not 15, ×3: [[Karel's p15]] | * Multiple of 5 but not 15, ×3: [[Karel's p15]] | ||
* Multiple of 15 but not 30, ×2: [[Queen bee shuttle]]<ref>As used in the [[RLE:Period90glidergun|smallest period-90 glider gun]] (note that it is shown in the [[p45 pi-heptomino hassler]] page, which also functions as a period-tripler, but is not a filter because it depends on a temporary block to destroy the second of every pair of gliders between those let through, which (if not destroyed) can otherwise destroy the hassler itself)</ref> | |||
==See also== | ==See also== | ||
* [[Period multiplier]] | * [[Period multiplier]] | ||
* [[Sparker]] | * [[Sparker]] | ||
==Notes== | |||
<references group="n" /> | |||
==References== | ==References== | ||
| Line 31: | Line 46: | ||
|p = 160020 | |p = 160020 | ||
|title = Re: Oscillator Discussion Thread | |title = Re: Oscillator Discussion Thread | ||
|author = | |author = Anivec | ||
|date = April 3, 2023 | |date = April 3, 2023 | ||
}}</ref> | }}</ref> | ||
Latest revision as of 19:04, 4 July 2025
A filter is an oscillator used to delete some but not all of the spaceships in a stream. For example, a blocker can delete every second glider in a stream of period 8n + 4, and can also do the same for LWSS streams. Other examples are the middleweight emulator, T-nosed p4 (either of which can be used to delete every second LWSS in a stream of period 4n + 2) and the fountain (which does the same for MWSS streams).
Filters can be used to make guns of high periods. For instance, the period-20 glider gun can be made p40 with a blocker, then p80 with Rich's p16, and even p160 with 68P32.1:
| p160 glider gun (click above to open LifeViewer) RLE: here Plaintext: here |
A smaller, more recent period-160 glider gun uses Charity's p16 as the first filter instead:
| p160 glider gun (click above to open LifeViewer) Catagolue: here |
List of filters
- Multiple of 4 but not 8, ×2: Blocker
- Multiple of 8 but not 16, ×2: Rich's p16,[n 1] Charity's p16
- Multiple of 16 but not 32, ×2: 68P32
- Multiple of 32 but not 64, ×2: 51P384[1]
- Multiple of 5 but not 10, ×2: p10 filter
- Multiple of 5 but not 15, ×3: Karel's p15
- Multiple of 15 but not 30, ×2: Queen bee shuttle[2]
See also
Notes
- ↑ This also applies to filtering LWSS's and MWSS's (of the same phase but with frontends extended forwards by one cell), as shown in the p48 LWSS gun
References
- ↑ Anivec (April 3, 2023). Re: Oscillator Discussion Thread (discussion thread) at the ConwayLife.com forums
- ↑ As used in the smallest period-90 glider gun (note that it is shown in the p45 pi-heptomino hassler page, which also functions as a period-tripler, but is not a filter because it depends on a temporary block to destroy the second of every pair of gliders between those let through, which (if not destroyed) can otherwise destroy the hassler itself)
External links
- Filter at the Life Lexicon