Hi Ditto,

Where are the two points located? Somewhere in 3D space, with x,y,z coordinates?

Or are the two points located in say the xy plane, or xz plane, or yz plane?

Which orientation should the sine wave amplitude point?
The direction of the (+) amplitude would be perpendicular to a line between the two points, and point in any 360 degree direction...

There would be a half wavelength, full wavelength, or some integer multiple, and negative mirror images...

The recent catenary2PtXYZ script hangs a catenary between two user selected points, but maintains the
y-axis for gravity.