@brief Get the type of the joint
@ingroup joints
@return the type, being one of these:
\li dJointTypeBall
\li dJointTypeHinge
\li dJointTypeSlider
\li dJointTypeContact
\li dJointTypeUniversal
\li dJointTypeHinge2
\li dJointTypeFixed
\li dJointTypeNull
\li dJointTypeAMotor
\li dJointTypeLMotor
\li dJointTypePlane2D
\li dJointTypePR
\li dJointTypePU
\li dJointTypePiston
@brief Get the type of the joint @ingroup joints @return the type, being one of these: \li dJointTypeBall \li dJointTypeHinge \li dJointTypeSlider \li dJointTypeContact \li dJointTypeUniversal \li dJointTypeHinge2 \li dJointTypeFixed \li dJointTypeNull \li dJointTypeAMotor \li dJointTypeLMotor \li dJointTypePlane2D \li dJointTypePR \li dJointTypePU \li dJointTypePiston