arclen expression function

Returns the arc length of a curve between two U positions.

All Usage Examples

See also: surflen, normal, curvature, unituv

Usage

arclen(surface_node, prim_num, ustart, ustop)

ustart and ustop are unit values, defined in the [0, 1] interval.

Note

the primitive must be either a NURBS, Bezier, or Polygon curve.

Examples

arclen("/obj/geo1/model1", 12, 0, 1)

Computes the length of the entire curve whose index is 12.