How-to: Get edge length
Get length of a edge using A3DCurveLength
which computes the length of a curve with interval of edge
https://docs.techsoft3d.com/exchange/latest/api/A3DSDKAdvancedTools_8h.html?highlight=a3dcurvelength#_CPPv414A3DCurveLengthPK10A3DCrvBasePK15A3DIntervalDataP9A3DDouble
For the full code, check out our forum post.