You could iterate over the spline saving out each point and tangent and saving that to a struct and either serialize it with json or just save it through the savegame system. Then you would just load this data and apply it to the spline at runtime.
You could iterate over the spline saving out each point and tangent and saving that to a struct and either serialize it with json or just save it through the savegame system. Then you would just load this data and apply it to the spline at runtime.