[cellular-automata.git] / brians-brain / README.md

Brian's Brain
=============

https://en.wikipedia.org/wiki/Brian%27s_Brain
https://en.wikipedia.org/wiki/Brian_Silverman

> Brian's Brain is a cellular automaton devised by Brian Silverman, which is
> very similar to his Seeds rule.
>
> Rules
> -----
> Brian's Brain consists of an infinite two-dimensional grid of cells, but
> unlike Seeds, each cell may be in one of three states: on, dying, or off.
> Each cell is considered to have eight neighbors (the Moore neighborhood), as
> in Seeds and Conway's Game of Life.
>
> In each time step, a cell turns on if it was off but had exactly two
> neighbors that were on, just like the birth rule for Seeds. All cells that
> were "on" go into the "dying" state, which is not counted as an "on" cell in
> the neighbor count, and prevents any cell from being born there. Cells that
> were in the dying state go into the off state.
Commit	Line	Data
c1471774 SK	1	Brian's Brain
	2	=============
	3
	4	https://en.wikipedia.org/wiki/Brian%27s_Brain
	5	https://en.wikipedia.org/wiki/Brian_Silverman
	6
	7	> Brian's Brain is a cellular automaton devised by Brian Silverman, which is
	8	> very similar to his Seeds rule.
	9	>
	10	> Rules
	11	> -----
	12	> Brian's Brain consists of an infinite two-dimensional grid of cells, but
	13	> unlike Seeds, each cell may be in one of three states: on, dying, or off.
	14	> Each cell is considered to have eight neighbors (the Moore neighborhood), as
	15	> in Seeds and Conway's Game of Life.
	16	>
	17	> In each time step, a cell turns on if it was off but had exactly two
	18	> neighbors that were on, just like the birth rule for Seeds. All cells that
	19	> were "on" go into the "dying" state, which is not counted as an "on" cell in
	20	> the neighbor count, and prevents any cell from being born there. Cells that
	21	> were in the dying state go into the off state.