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on 19 Oct 2022
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set(gcf,Color='k');
a=-pi:.02:pi;
S= rand(315);
S(158, 158) = -.3;
g=abs(ifft2(S./abs(a+i*a').^2.1))*2-3.1;
g=g+g';
[u,v,w]=cart2sph(a,a',pi);
[x,y,z]=sph2cart(u,v,w+g*2);
s=@surf;
s(x,y,z,g);
hold on
s(x,-z,y,g);
s(-z,x,y,g);
colormap(cool.^4)
axis equal off
shading flat
camlight
camva(6)
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