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Dear Prof. Rougier,
not an issue, just a comment, please move this to discussions:
in Speth's class Streamlines,
instead of doing bilinear interpolation in the inner loop on a 100 x 100 grid,
expand it once to a say 800 x 800 grid with scipy.ndimage.zoom( order=1 ) --
a space-time tradeoff.
Bytheway, you might like https://anvaka.github.io/fieldplay ; plug in e.g.
v.x = cos( p.y );
v.y = sin( p.x );
or
v.x = -p.x + cos( p.y );
v.y = sin( p.x ) - p.y;
cheers
-- denis
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