Mesh to Curve Node
The Mesh to Curve node generates a curve from a mesh. The result is a poly spline, with a point for every selected vertex on the mesh. Any intersection of more than two selected edges will cause a break in the spline. Meaning that if a the mesh has grid-like topology and a continuous spline is desired, the Selection input is very important.
Attributes will be transferred to the resulting curve, including named attributes.
If the mesh has attributes with the names of built-in curve attributes like
they will be copied as well.
Standard mesh input.
A field input evaluated on the edge domain to determine whether each edge will be included in the result.
Using this input is more efficient than deleting parts of the geometry before or after the conversion.