Injection
Injection is a reaction in which a hole in a regular spaceship stream is filled partially or fully by adding a new spaceship or signal of the same type without affecting the existing spaceships in the stream. Depending on the period of the stream, different mechanisms can be used. For adding a spaceship to an existing multi-lane convoy, see inserter.
For large period glider streams, simple reactions such as LWSS-LWSS bounce and LWSS-glider bounce suffice. A large number of Herschel-based edge shooters and transparent conduits are also known, for example the NW31 Herschel-to-glider converter and the Fx119 inserter.
Shown below is an injector found by Dave Buckingham that can fill a hole in a p15 glider stream:
| <html><div class="rle"><div class="codebox"><div style="display:none;"><code></html>x = 23, y = 21, rule = B3/S23
2bobo$3b2o$3bo17bo$20bo$20b3o3$10bo$11b2o$10b2o2$b2o$obo2b2o$2bob2o$6b
o4$5b2o$6b2o$5bo!
#C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
#C [[ THEME 6 GRID THUMBLAUNCH THUMBSIZE 2 ZOOM 8 AUTOSTART LOOP 96 GPS 8 ]]<html></code></div></div><canvas width="200" height="300" style="margin-left:1px;"><noscript></html> Please enable Javascript to view this LifeViewer. <html></noscript></canvas></div></html> |
| (click above to open LifeViewer) RLE: here Plaintext: here |
For very low-period glider streams, a GIG is a much more efficient insertion method, in the sense that fewer synchronized signals are needed. However, it has been shown that colliding gliders can complete an insertion even into a single-glider gap in a period-14 stream.
The BFx59H injector is an injector that injects a Herschel onto an existing track.