https://cpp.openfoam.org/v10/classFoam_1_1RBD_1_1joints_1_1functionDot.html
functionDot Class Reference | OpenFOAM Source Code Guide
functionDot Class Reference | OpenFOAM | Free, open source CFD software, licensed under the GPL by The OpenFOAM Foundation
class referencesource codeopenfoamguide