Computes the length of the curve from a to b
function curveLength import ThermoSysPro.Properties.WaterSteam.IF97_packages.IF97_wAJ.Spline_Utilities.Modelica_Interpolation; extends Modelica.Icons.Function; input Modelica_Interpolation.Bspline1D.Data spline "Bspline data"; input Real a "left end"; input Real b "right end"; input Real err = 1e-8 "relative error"; output Real I "curve length from a to b"; end curveLength;