Method and systems for determining a set of stimulation parameters for an implantable stimulation device include receiving a set of stimulation parameters including at least one electrode for delivery of stimulation and a stimulation amplitude for each electrode； determining, using the set of stimulation parameters, an axial stimulation field for neural elements oriented axially with respect to a longitudinal axis of the lead； and outputting the first axial stimulation field for viewing by a user； receiving, by the computer processor. The methods and systems can be used to model other neural elements oriented non-orthogonally with respect to the longitudinal axis of the lead and determine a non-orthogonal stimulation field.
