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%% 二维元胞自动机

%imagesc(a)的色度矩阵a中0->256由蓝变黄

% 规则，先把中间点置为1，每一时间每一点如果

%周围八个点和为偶数，则变为0，为奇数则变为 1

% 颜色控制

clc, clear

Map = [1 1 1; 0 0 0];% [0 0 0] is black, [1 1 1] is white,

colormap(Map);

% 设置网格大小

S = 121;

L = zeros(S);

% 把中间一个数设置为 1 作为元胞种子

M = (S+1)/2;

display(M)

L(M, M) =1;

Temp = L;

% imagesc(L);

% 计算层数

Layer = (S-1)/2 + 1;

display(Layer)

for t=2:Layer

for x=M-t+1:M+t-1 % 60-62,59-63...1-121

if x==M-t+1 || x==M+t-1

for y=M-t+1:M+t-1

SUM = 0;

for m=-1:1

for n=-1:1

if x+m>0 && x+m<=S && y+n>0 && y+n<=S % s+121;

SUM = SUM + L(x+m, y+n);

% display(SUM)

end

end

end

SUM = SUM - L(x, y);

Temp(x, y) = mod(SUM, 2); % mod(a,b)就是求的是a除以b的余数

end

else

y = M-t+1;

SUM = 0;

for m=-1:1

for n=-1:1

if x+m>0 && x+m<=S && y+n>0 && y+n<=S

SUM = SUM + L(x+m, y+n);

end

end

end

SUM = SUM - L(x, y);

Temp(x, y) = mod(SUM, 2);

y = M+t-1;

SUM = 0;

for m=-1:1

for n=-1:1

if x+m>0 && x+m<=S && y+n>0 && y+n<=S

SUM = SUM + L(x+m, y+n);

end

end

end

SUM = SUM - L(x, y);

Temp(x, y) = mod(SUM, 2);

end

end

L = Temp;

imagesc(L);

% 速度控制

pause(0.05);

end