confocaloid wrote: ↑February 16th, 2024, 7:48 pm

Here is some oddity I guess, for people to have some more things to discuss.

...

Any feedback on these contraptions is of course welcome (partly because most of my patterns are significantly smaller in size).

Yup, I'd say those patterns are both shuttles and glider loops. The oddity seems like the kind of thing that often shows up with engineered patterns that are built to test the limits of a definition.

In this case, when you look at the pattern as a glider loop, the shuttle part of it has an adjustable but high repeat time. So the length of that 180-degree segment is often going to be the determining factor as to whether more gliders can be added to the loop, just because it makes the repeat time higher.

Never mind about "quasi-shuttle" ...
As a side note on possible names for shuttle-like things: on another thread

Sokwe has pointed out that I was wrong about what "quasi-shuttle" is supposed to mean. It turns out that the LifeWiki article I was using as a reference has been wrong for the last half-decade or so. So I've

patched up that article now.

Engineered patterns for "terminology testing"
There were some engineered patterns that I was thinking of building also, and come to think of it they're fairly easy to build. Here's a sample:

Code: Select all

```
#C p192 glider loop
x = 104, y = 104, rule = B3/S23
50b2o$50bobob2obo$52bobob2o$52b2o$43b2o$43b2o6$53b2o2b2o$50b2o5b2o$49b
o$52bo2$50b3o$40b2o13bo$40b2o8b3ob2o$44b3o7b2o$54bo3$54bo$54bo12b2o$
54bo9b2o2bo$45b2o17b2obo$41b2obobo20b2o$41bob2obobo14b3obo$47b2o14b3ob
o$62bo3b2obo$47b2o14b2o3b2o$47b2o16b2o$65bob3o$30b2ob2o34bo$24b2obo3bo
bo12bo$24bob5o2bo11bobo$30bobo13bo$25b2ob2o2b2o9b3o$25b2ob2obo11bo$28b
2obo53b2o$30bo44b2o8b2o7bo$76bo17bo$64b2o9bo17b2o3b2o$65bo9b2o9bo11b2o
$11b2o52bobo9bo7b3o6bo$b2o8b2o53bobo6b3o6b2obo6bo$2bo64bo3b2obo8b2o$bo
69b2ob2o8b2obo$b2o9bo5b2o3b3o14bo44b3o$3bo7b3o25bo46bo15b2o$b3o6b2obo
25b3o61bo$o8b2o26bo55bo6b3o$2o8b2obo24bo54bo6bo$11b3o65bo13bo7b2o$12bo
15b2ob2o2bo42bobo21bo$29bob2o2bo43bo21bo$19bo6b3o6bobo53b2o8b2o$19bo6b
o9bobo52b2o$4b2o13bo7b2o9bo$4b2o22bo9b2o$27bo$17b2o8b2o44bo$17b2o53bob
2o$60bo11bob2ob2o$58b3o9b2o2b2ob2o$57bo13bobo$56bobo11bo2b5obo$57bo12b
obo3bob2o$34bo34b2ob2o$34b3obo$37b2o16b2o$34b2o3b2o14b2o$34bob2o3bo$
36bob3o14b2o$36bob3o14bobob2obo$35b2o10b2o8bobob2o$36bob2o6b4o7b2o$35b
o2b2o5bo3b2o$35b2o9b2ob2o$47b2o2bo$49b3o$50bo2$46b3o$58b2o2b2o$55b2o5b
2o$54bo$57bo2$55b3o$45b2o13bo$45b2o8b3ob2o$49b3o7b2o$59bo4$59b2o$59b2o
$50b2o$46b2obobo$46bob2obobo$52b2o!
```

If a glider loop is built with unusually high-period reflectors, then technically only one glider can fit in the loop.

I'm thinking that this example is uncontroversial -- it's definitely a glider loop by anyone's definition -- because

**A)** there's no "back and forth" going on here (unless two 90-degree reflectors get artificially classified as a 180-degree reflector, at least!) and

**B)** it is definitely possible to adjust the loop to fit more gliders in -- it's only at this particular size that the loop is limited to one glider.

How about this case, though?

Code: Select all

```
#C p720 glider loop
x = 246, y = 246, rule = LifeHistory
102.2A11.A$102.2A10.A.A$114.A.A2.2A3.A$113.2A.2A2.A2.A.A12.A$117.A.A
3.A.A10.3A$113.2A.A2.4A.A10.A$113.2A.A.A3.A12.2A$117.A.A3.A$118.A.A3.
A30.2A$109.3A.A5.A3.2A30.2A5.2A$108.A.4A48.2A$107.A$108.2A$160.2A$
160.2A$73.A.2A9.2A.A5.2A69.2A$73.2A.A2.2A.2A2.A.2A4.A2.A68.2A$76.A.A.
A.A.A.A6.A.2A$73.3A.A7.A.3A3.A$73.A2.A.A5.A.A2.A2.2A$76.4A3.4A20.2A$
75.A3.A3.A3.A19.A$76.2A7.2A21.3A24.2A$110.A11.2A11.2A$75.4A5.4A35.A$
74.A.2A2.3A2.2A.A31.3A$75.2A.7A.2A32.A$148.2A.2A$146.A2.A.A.A$81.A.A
62.2A.A2.A$129.2A18.A$80.A3.A43.A.A18.2A$80.A3.A44.A17.2A2.A.A$81.3A
62.A2.A2.2A$147.2A2$77.2A$77.A.A7.3A$78.3A6.A.A$79.2A7.A82.2A$76.2A
10.2A37.A43.2A$76.3A9.3A35.A.A16.2A$89.2A35.A.A16.2A$127.A$77.2A87.2A
$77.2A18.A68.2A$97.A72.2A54.2A.2A$96.A.A71.2A48.2A3.A.A.A$90.2A5.A
121.A.5A.A2.A$89.A2.A4.A11.2A5.2A86.2A14.A.2A.2A.3A$82.2A5.A.A5.A13.A
3.A.A46.2A34.4A4.2A10.A.A4.A$82.2A5.A7.A11.2A5.A47.2A34.3A.2A2.2A8.3A
4.A.2A$96.A.A106.A12.3A4.2A2.A$90.A6.A22.3A94.2A6.5A$88.A2.A5.A22.3A
91.2A.3A$88.A.A21.3A6.A72.2A17.3A.2A6.5A$89.A23.A7.A72.2A18.2A2.3A4.
2A2.A$113.2A6.A96.3A4.A.2A$92.A13.2A4.2A6.A.A88.A8.A.A4.A$91.A.A12.2A
4.A.A97.A7.A.2A.2A.3A$92.2A18.3A95.3A6.A.5A.A2.A$111.2A.A5.A.A71.2A
24.2A3.A.A.A$112.3A6.A73.A2.2A26.2A.2A$112.2A7.A10.A.A60.2A.3A$101.2A
9.2A7.A9.A54.A9.2A.2A$100.A2.A9.A.A4.3A8.A3.A49.A.A10.A27.A$100.A11.
3A5.3A8.A53.2A39.3A$100.A11.3A16.A2.A94.A$100.A.2A27.3A94.A.A$102.2A
86.A2.A4.A2.A26.A.A$112.2A37.2A.2A32.3A2.6A2.3A25.A$111.3A38.A.A6.A
28.A2.A4.A2.A$101.2A9.2A37.A2.A.2A.2A.A15.A.A$101.2A48.3A2.A.A3.A14.A
$106.A65.2A2.A4.A$106.A46.2A4.2A.A9.2A.A2.A.2A62.2A$105.A.A44.A.4A4.
2A12.2A66.2A$152.2A9.A$160.A2.A2.3A$152.2A9.A2.A.A17.2A$105.A46.A.4A
4.2A2.3A17.2A36.2A$153.2A4.2A.A60.A.A$102.A5.A9.A104.A$99.2A4.A4.2A7.
2A30.3A2.A.A3.A59.2A7.2A$98.A.2A.2A.2A.2A.A5.2A31.A2.A.2A.2A.A68.2A$
98.A13.A39.A.A6.A22.4A$101.A7.A41.2A.2A27.2A54.2A.A$98.A2.A7.A2.A69.A
3.A3.A48.2A.3A$101.A.A3.A.A32.2A39.A6.A4.A49.A$98.A.3A.A.A.3A.A29.2A
39.2A9.A.A42.2A.3A$97.A15.A81.2A41.A2.2A$97.3A2.A.A.A.A2.3A123.A.A$
100.A.A.A.A.A.A70.2A6.2A45.A.A.2A.A$97.2A.A2.2A.2A2.A.2A66.A2.A4.A2.A
27.2A16.A2.A.2A$97.A.2A9.2A.A66.A2.A4.A2.A28.A19.A$180.A2.A4.A2.A28.A
.A16.2A$181.2A6.2A30.2A13.A.A2.2A$236.2A2.A2.A$241.2A2$39.2A$39.2A5.
2A166.A$39.2A5.2A67.2A96.A.A$38.3A74.2A97.2A$37.A2.A$15.2A19.A3.A5.A$
15.2A15.4A9.A.A87.4B$32.4A.A6.2A.2A.2A82.6B$36.A7.A5.2A81.7B82.2A15.
2A$9.2A33.2A86.4BD3B82.2A15.A.A$9.2A120.4BD4B101.A$13.2A26.2A87.4BD4B
102.2A$13.2A25.A2.A85.4BD4B$41.A.A84.4BD4B$43.2A82.4BD4B$44.A81.4BD4B
21.2A$8.2A30.2A83.4BD4B22.2A$8.2A30.2A82.4BD4B$40.2A81.4BD4B71.2A$28.
A3.2A7.A.2A77.4BD4B72.2A7.A3.2A$27.A.A3.A7.3A77.4BD4B81.A.A2.A$27.2A
3.A9.A77.4BD4B82.A.A4.A$31.A87.4BD4B84.A.5A$27.5A.A84.4BD4B87.A$27.A
4.A.A82.4BD4B77.A9.A3.2A$29.A2.A.A81.4BD4B77.3A7.A3.A.A$28.2A3.A7.2A
72.4BD4B77.2A.A7.2A3.A$41.2A71.4BD4B81.2A$113.4BD4B82.2A30.2A$88.2A
22.4BD4B83.2A30.2A$88.2A21.4BD4B81.A$110.4BD4B82.2A$109.4BD4B84.A.A$
108.3ABD4B85.A2.A25.2A$3.2A102.3BAD4B87.2A26.2A$4.A101.3BAD4B120.2A$
4.A.A15.2A82.3BD4B86.2A33.2A$5.2A15.2A82.7B81.2A5.A7.A$106.6B82.2A.2A
.2A6.A.4A$107.4B87.A.A9.4A15.2A$199.A5.A3.A19.2A$205.A2.A$30.2A97.2A
74.3A$30.A.A96.2A67.2A5.2A$31.A166.2A5.2A$205.2A2$3.2A$2.A2.A2.2A$3.
2A2.A.A13.2A30.2A6.2A$5.2A16.A.A28.A2.A4.A2.A$5.A19.A28.A2.A4.A2.A66.
A.2A9.2A.A$2.2A.A2.A16.2A27.A2.A4.A2.A66.2A.A2.2A.2A2.A.2A$2.A.2A.A.A
45.2A6.2A70.A.A.A.A.A.A$6.A.A123.3A2.A.A.A.A2.3A$3.2A2.A41.2A81.A15.A
$.3A.2A42.A.A9.2A39.2A29.A.3A.A.A.3A.A$A49.A4.A6.A39.2A32.A.A3.A.A$.
3A.2A48.A3.A3.A69.A2.A7.A2.A$3.A.2A54.2A27.2A.2A41.A7.A$58.4A22.A6.A.
A39.A13.A$13.2A68.A.2A.2A.A2.A31.2A5.A.2A.2A.2A.2A.A$13.2A7.2A59.A3.A
.A2.3A30.2A7.2A4.A4.2A$22.A104.A9.A5.A$20.A.A60.A.2A4.2A$20.2A36.2A
17.3A2.2A4.4A.A46.A$58.2A17.A.A2.A9.2A$77.3A2.A2.A$82.A9.2A$2A66.2A
12.2A4.4A.A44.A.A$2A62.2A.A2.A.2A9.A.2A4.2A46.A$64.A4.A2.2A65.A$68.A
14.A3.A.A2.3A48.2A$65.A.A15.A.2A.2A.A2.A37.2A9.2A$44.A2.A4.A2.A28.A6.
A.A38.3A$16.A25.3A2.6A2.3A32.2A.2A37.2A$15.A.A26.A2.A4.A2.A86.2A$15.A
.A94.3A27.2A.A$16.A94.A2.A16.3A11.A$17.3A39.2A53.A8.3A5.3A11.A$19.A
27.A10.A.A49.A3.A8.3A4.A.A9.A2.A$45.2A.2A9.A54.A9.A7.2A9.2A$45.3A.2A
60.A.A10.A7.2A$15.2A.2A26.2A2.A73.A6.3A$16.A.A.A3.2A24.2A71.A.A5.A.2A
$15.A2.A.5A.A6.3A95.3A18.2A$15.3A.2A.2A.A7.A97.A.A4.2A12.A.A$18.A4.A.
A8.A88.A.A6.2A4.2A13.A$17.2A.A4.3A96.A6.2A$16.A2.2A4.3A2.2A18.2A72.A
7.A23.A$16.5A6.2A.3A17.2A72.A6.3A21.A.A$26.3A.2A91.3A22.A5.A2.A$16.5A
6.2A94.3A22.A6.A$16.A2.2A4.3A12.A106.A.A$17.2A.A4.3A8.2A2.2A.3A34.2A
47.A5.2A11.A7.A5.2A$18.A4.A.A10.2A4.4A34.2A46.A.A3.A13.A5.A.A5.2A$15.
3A.2A.2A.A14.2A86.2A5.2A11.A4.A2.A$15.A2.A.5A.A121.A5.2A$16.A.A.A3.2A
48.2A71.A.A$15.2A.2A54.2A72.A$78.2A68.A18.2A$78.2A87.2A$118.A$99.2A
16.A.A35.2A$99.2A16.A.A35.3A9.3A$73.2A43.A37.2A10.2A$73.2A82.A7.2A$
156.A.A6.3A$156.3A7.A.A$167.2A2$97.2A$92.2A2.A2.A62.3A$92.A.A2.2A17.A
44.A3.A$95.2A18.A.A43.A3.A$96.A18.2A$93.A2.A.2A62.A.A$92.A.A.A2.A$93.
2A.2A$125.A32.2A.7A.2A$123.3A31.A.2A2.3A2.2A.A$122.A35.4A5.4A$109.2A
11.2A11.A$109.2A24.3A21.2A7.2A$138.A19.A3.A3.A3.A$137.2A20.4A3.4A$
152.2A2.A2.A.A5.A.A2.A$152.A3.3A.A7.A.3A$149.2A.A6.A.A.A.A.A.A$78.2A
68.A2.A4.2A.A2.2A.2A2.A.2A$78.2A69.2A5.A.2A9.2A.A$84.2A$84.2A$136.2A$
138.A$82.2A48.4A.A$82.2A5.2A30.2A3.A5.A.3A$89.2A30.A3.A.A$122.A3.A.A$
109.2A12.A3.A.A.2A$110.A10.A.4A2.A.2A$107.3A10.A.A3.A.A$107.A12.A.A2.
A2.2A.2A$121.A3.2A2.A.A$129.A.A10.2A$130.A11.2A!
```

This has

**got** to be an unnecessarily convoluted example -- it's done this way just because I couldn't seem to find a duoplet-spark or banana-spark generator with enough clearance to turn a glider twice, quickly enough.

My idea would be that the central glider in the above pattern is going in a loop around the red line. The reflectors could theoretically support two gliders in the loop, but it doesn't work because the "back" and "forth" sides are too close together (though not overlapping).

It seems like it will be hard to find many people who would object to calling this a glider loop, even when the lanes are this close together. I'll be happy to be proved wrong about that, so if you're thinking "Silly dvgrn, that's not a glider loop" then please put in a quick post here to say so!

Until and unless posts like that show up, I'd rather not have the idea of "

*it must be possible to add multiple gliders or it's not a glider loop*" find its way onto the LifeWiki.