warp.fem.at_node

warp.fem.at_node = <warp._src.fem.operator.Operator object>

Return a copy of the Sample s moved to the coordinates of a local node of the field f.

If f is a DiscreteField, node_index_in_elt is required and indicates the element-local index of the node to consider. If f is a TestField or TrialField, node_index_in_elt must not be provided, and will be automatically set to the test (resp. trial) node currently being evaluated.

If f is a DiscreteField, the returned sample carries no test or trial degree of freedom: test and trial fields evaluate to zero there.