Draft angle analysis curve on mesh

What should I do to get draft angle analysis curve on mesh.
Yes it makes it but result is 200000 tiny curves (only 20000 remain in the picture) and tiny curves are not continues.

I tried also sketch on polygon mesh but it was horrible, I couldn’t use it at all. It did not work like Interpolate curve on surface…

Silhouette is also awful :frowning:

Lets see what to do…