Is it possible to create sine curves on a curved surface in grasshopper?

Is it possible to create sine curves on a curved surface in grasshopper ?

Yes. One way of doing it could be to draw a planar sine curve and then project the resulting curve onto the Surface (from underneath or from above, or from whatever direction that doesn’t distort the curve form when projected onto the surface).

// Rolf

Also look into the components “map to surface” and “curve on surface”