@brief Utility function
@return 1 if the two bodies are connected together by
a joint that does not have type @arg{joint_type}, otherwise return 0.
@param body1 A body to check.
@param body2 A body to check.
@param joint_type is a dJointTypeXXX constant.
This is useful for deciding whether to add contact joints between two bodies:
if they are already connected by non-contact joints then it may not be
appropriate to add contacts, however it is okay to add more contact between-
bodies that already have contacts.
@ingroup joints
@brief Utility function @return 1 if the two bodies are connected together by a joint that does not have type @arg{joint_type}, otherwise return 0. @param body1 A body to check. @param body2 A body to check. @param joint_type is a dJointTypeXXX constant. This is useful for deciding whether to add contact joints between two bodies: if they are already connected by non-contact joints then it may not be appropriate to add contacts, however it is okay to add more contact between- bodies that already have contacts. @ingroup joints