ConwayLife.com

x = 10, y = 10, rule = B2o/S2m34H ob2o7b$b2obo6b$2ob2o6b$2b2obo5b$2bob2o5b$3b2obo4b$3bob2o4b$3b3obo3b$6b2o3b$ 6bobo2b$6b3o2b$8b3o! This structure (and others like it) are extremely stable. I can think of some intuitive reasons for why this is so, but I haven't considered the issue carefully. The pr...

Failed attempts at finding stable reflectors: x = 117, y = 102, rule = Fireworld 2.A.A$8.AB$A7.AB$3.A2$A4.A6$16.A.A$23.AB$23.AB$16.A$19.A$16.A10$32.A. A2.A$40.AB$40.AB$34.A.A2$32.A3.A12$49.A.A4.AB$56.AB2$51.A.A9$66.A3.AB $63.A6.AB2$67.A$64.A12$82.A5.AB$88.AB2$81.A3.A11$100.A3.AB$104.AB$98. A.A10$115...

Added to the list . Here's a Lua script to load the .mem files in Golly because I didn't want to deal with getting the Python program to work. --[[ deca-asm.lua blah 2020 A script to load data into Hactar's computer's ROM. Hacked together in a few hours. ]] local g=golly() g.warn("Ensure that data t...

The algorithm at the end of your last post would trip up on /2/3 because the first character of the survival conditions is not a digit, but is the null character since the component is length 0. Omitting the `C` component should imply `C2`; after all, `C2` is just the base case for `Cn`. `C(n<2)` ma...

B0/S0/NR0 ("Everybody lives forever") Support for range 0 rules should not be required for compliance with the standard. I'd even say 'R0' should be syntactically invalid. Dimensionality: `1D`, `2D`, `3D`, etc. (default = 2D) Provisions or specifications for 1D rules should not exist. Nobody would ...

x = 12, y = 38, rule = Wilfred 12C36$2.CAB2ABAC$3.6C! This is the same mechanism as the common adjustable Wire2 gun (or at least, highly similar): x = 27, y = 6, rule = Wire2 22.CABC$21.CBCABA$26CB$26CB$21.CBCABA$22.CABC5$18.4CABC$17.4CBCABA$26CB$26CB$17.4CBCABA$18.4CABC! Poorly optimised prime num...

Bytes of long words on the PDP-11 were stored 3412 there... 2143, actually. I just tested this on an emulator: # cat end.c int main(){ long x=0x12345678; char *p=(char*)&x; printf("%x %x %x %x\n",p[0],p[1],p[2],p[3]); printf("%d %d\n",sizeof(int),sizeof(long)); return 0; } # cc end.c # ./a.out 34 1...

hkoenig wrote: ↑

October 2nd, 2020, 9:50 pm

why to never, ever trust any code that uses C bit-fields.

... Why do you never trust code that uses bitfields? I don't think I've ever heard that before.

A /2/3 variant with signal circuitry. Sounds familiar . Splitter and diode for half-sheath wire. The diode converts the signal to a photon and back. x = 40, y = 14, rule = Wilfred 10.C.C.C.C.C$C.C.C.C.2C$11.C.C.C.C.C$.C.C.C.C.C$9.C21.2C.C.C.C$11.C 15.C.C.C$9.C17.A7.C.C.C$11.C16.C.C.2C$9.C$11.C$9.C21...

Neat hack. Here's a command to (almost) convert it to RLE: dc -e"[q]sQ[_1sx]s.?sxsylxn[bo]n[?z1=Qrdly-dn[$]n0<.sydlx-1-n[bo]nsxdx]dx[!]p" For the glider cell list it produces "0bo0$1bo1$1bo0$0bo1$1bo!". The 0s present a problem; 0b probably works on some (most?) decoders, but 0$, at least on mine, r...

And I've sidestepped issues of keeping memory bounded, rehashing, etc. What do you mean by 'rehashing'? Edit: Oh, and I don't think that your implementation of the core is complete in the sense that you handle empty tiles and universe expansion explicitly from outside. I think that work has to be d...

Hopefully this helps to demystify hashlife. It generates the "RESULT" of an r-pentomino surrounded by some empty space and prints it. See also this explanation . The program is divided into two halves, the hashlife implementation itself, and the part that interfaces with it to feed it a pattern and ...

Adder calculating 1+255: #C 8-bit ripple carry adder. For operands, the presence of a photon stream is 1, #C absence is 0. For carry-in (cin), carry-out (cout) and the sum, it's the #C opposite. x = 328, y = 84, rule = glogic 135.2E.E.E.2E.E$134.E3.E.E.E.E.E$135.E2.E.E.E.E.E$136.E.E.E.E.E.E$ 134.2E3...

Shift register with spatial period 4: x = 66, y = 15, rule = LogicWorld 3A.3A.3A.3A.3A.3A.3A.3A$A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A5.5A.2B2.3B.3B .3B4.B.2B$3A.3A.3A.3A.3A.3A.3A.3A5.5A.B.B.B.B2.B2.B.B4.B.B.B$.A3.A3.A 3.A3.A3.A3.A3.A4.D.5A.B.B.3B2.B2.3B4.B.B.B$.A3.A3.A3.A3.A3.A3.A3.A2.A HP.5A.B.B.B.B2.B2....

Here's a combinational logic approach to a B3/S23 metacell. The inputs are paired and added up in half-adders, producing 4 2-bit values that are then fed through more adders, then 2 3-bit values are fed to a ripple carry adder producing a 4 bit neighbour count. Some simple logic (Where the 4 digits ...

From the same lineage, new high-period record found with a newer version of epsrc I'm working on, (224,487)c/4596: #C by blah and gameoflifemaniac x = 1, y = 1, rule = MAPhQAMHAREoIgIhgSIgAAAAACAgAQBKAgAAEAEABCAAAAAgAAgIAAAAAAAQQAAAAAAAAAAAAAAAAQAAAAAABAAAA o! Edit: (242,570)c/4986: #C by blah and g...

Another high period record in the same as lineage as the others I posted here, (149,327)c/3070:

New high period record, (136,315)c/2990:

A thread for rules found by epsrc . Here's a rule with a (150,276)c/2754, the highest period for a 1-cell spaceship in this rulespace that I know at time of writing: #C by blah and gameoflifemaniac x = 1, y = 1, rule = MAPhQAMHAREoIgIhgCIgAAAAACAgAQBAAgAAEAEAACCAAAAgAAAIAAABAAAQAAAAAAAAAAAAAAAAAQAAA...

I want to see the (96,129)c/1498 one, but so far it's just a Discord rumor. It's already here . (Also I posted the p1278 on these forums before I posted it on Discord) Also, I am continually finding more and more higher-period ships as we speak. As I type this, my highest period is p2074 (139,198):...

If you set the hamming distance to 3, does that always mean it will search 512*511*510=133432320 rules? Or rather 510*509*508=131871720? No. Your logic fails to eliminate redundancies. You have 510 places to put the first alteration, and 509 places to put the second. However, 510*509 would mean tha...

Well, CGoL is a MAP rule. Take Gemini, and move the two parts arbitrarily far away, to make it arbitrarily slow.

That's probably not in the spirit of the question, but I'm not sure what is.

Cool program, I found this c/54: x = 1, y = 1, rule = MAPhQBMEABAgAAIhACAgAAAAASAgAABAAgAAEAAAACAAAAAgAAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA o! Slower spaceships are yet to be found. This rule seems to be good at producing a huge amount of results in epsrc. I managed to derive a p1278 from it: x...

What do I type in to get really slow ships? I tried typing in epsrc ham 1 MAP -p 10 -m 10 so it gets me only c/10's, but didn't output anything. "ham 1 MAP" means "exhaustively search the alternating rules (ones with B0 and no S8) of Hamming distance 1 from "MAP" (which is shorthand for MAPgAAAAAAA...

All it does is displays the help screen. Ok, stupid question time. So how do I use it? Navigate to the directory where the executable is stored and run it in a command line. That's assuming you know (1) how to run an executable from a command line, (2) where the executable is, (3) how to navigate t...