def update():
"""
called anytime an output is accessed while the component
is dirty (input has changed)
"""
msg_info('Not implemented yet')
pass
def addKToMatrix(self, mparams, nNodes, nDofs):
msg_info('addKToMatrix: not implemented yet')
pass
def addDForce(self, m, dforce, dx):
msg_info('addDForce: not implemented yet')
pass
def addForce(self, m, forces, pos, vel):
msg_info('addForce: not implemented yet')
pass
def init(self):
msg_info('init: not implemented yet')
pass
