1 #ifndef SimTK_SIMBODY_CONSTRAINT_BUILTINS_H_     2 #define SimTK_SIMBODY_CONSTRAINT_BUILTINS_H_    40 #endif // SimTK_SIMBODY_CONSTRAINT_BUILTINS_H_ Declares the Constraint::Rod class. 
 
Declares the Constraint::PointInPlane class. 
 
Declares the Constraint::Weld class. 
 
Declares the Constraint::Ball class.