dJointGetHingeAngle() isn't a vector function, it returns the angle directly...
angle#=dJointGetHingeAngle(joint) ;)
The dJointGetHingeAnchor() function is a vector function though, it fills dVectorX(), dVectorY() and dVectorZ().
angle#=dJointGetHingeAngle(joint) ;)
The dJointGetHingeAnchor() function is a vector function though, it fills dVectorX(), dVectorY() and dVectorZ().