API ReferenceModelingAlgorithmsTKHelixTKHelix7 classes across 2 packages.Copy MarkdownOpenHelixBRep1classHelixGeom6classesTopCnxOCCT package TopCnx: TopCnx_EdgeFaceTransition.HelixBRepOCCT package HelixBRep: HelixBRep_BuilderHelix.