A catenary wire spline for gently-curving track.
For the spline meshes to be represented in game with the correct proportions, a spline point should be added at an approximate multiple of 50m from the prior point.
Suitable for straight track and for curvatures with a radius exceeding 450m. For sharper curves use <kuid:368725:30133>. The default height of the pickup wire above the railtop is 5.3m, midway within the NSW operating range of 4.75 to 5.8m.
The model meshes are based on those in a workbook provided by David Owen (davido). Thanks to David for sharing his work.