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on 17 Nov 2023
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drawframe(1);
function drawframe(f)
phi = (sqrt(5)+1)/2;
maxval = 1500;
d = 2*pi/phi;
theta = 0:d:maxval;
r = sqrt(theta);
[x,y] = pol2cart(theta,r);
clf
hgt = hgtransform;
[v,c] = voronoin([x' y']);
for i = 1:length(c)
if all(c{i}~=1)
patch(hgt,v(c{i},1),v(c{i},2),i, ...
EdgeColor=0.6*[1 1 1], ...
LineWidth=0.1);
end
end
line(hgt,x,y, ...
LineStyle='none',Color=0.3*[1 1 1], ...
Marker='.',MarkerSize=3)
k = 38;
% This is an annular mask to cover up the edges of the sunflower
tt = linspace(0,2*pi,100);
h = patch(hgt,[0.95*k*cos(tt) 2*k*cos(tt)],[0.95*k*sin(tt) 2*k*sin(tt)],'white','EdgeColor','none');
line(hgt,0.95*k*cos(tt),0.95*k*sin(tt),'Color',0.6*[1 1 1],'LineWidth',1)
axis(k*[-1 1 -1 1])
axis off
axis square
set(gca,'Units','normalized','Position',[0 0 1 1])
colormap(flipud(summer.^0.5))
r = interp1([0 48],[8*pi 0],f);
R = makehgtform('zrotate', r);
set(hgt,'Matrix',R)
end
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