Parametric curves

[Ofnuts]

Trying to do a simple linear spiral with the polar curve script. So, in the GUI;

Code:

r(t)=t/10.
start=0.
end=2*N*pi

For a few turns (N<=5), the result is nice, but around N=8 things start to degrade, this is N=9:

   

At N=12, things are really out of whack:

   

At N=25, you wonder about the validity of your formula:

   

All these with highest accuracy (level 10).

TBH I'm surprised by the low number of anchors, about two anchors per turn, even at level 10.