def test_multibody_gravity_vector(self):
plant = MultibodyPlant()
plant.AddForceElement(UniformGravityFieldElement([0.0, -9.81, 0.0]))
plant.Finalize()
def test_multibody_gravity_default(self):
plant = MultibodyPlant()
plant.AddForceElement(UniformGravityFieldElement())
plant.Finalize()