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Bug in phase screen generation when seed_density not equal dx_pixel
Hi! Thanks for sharing this nice approach and code! I think I found a bug in RandPhaseScreen_RealSpaceNM.m
for the case when seed_density
is not equal to dx_pixel
.
Your current code, starting in line 52, is:
if (Nsame>1)
for ii=1:Nsame:N(1)-Nsame
for jj=1:Nsame:N(2)-Nsame
ph_mask(ii+1:ii+Nsame,jj+1:jj+Nsame) =ph_mask(ii,jj);
end
end
end
This generates some diagonal pattern, which probably is because you overwrite ph_mask with itself while you are changing it. I found that the following code fixes the issue:
ph_mask_same = zeros(size(ph_mask));
if Nsame > 1
for ii = 1 : Nsame : N(1)-Nsame
for jj = 1 : Nsame : N(2)-Nsame
ph_mask_same(ii+1:ii+Nsame, jj+1:jj+Nsame) = ph_mask(ii,jj);
end
end
ph_mask = ph_mask_same;
end
Perhaps you would like to update the file.
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