Combine Components — Assembles a vector field from three scalar fields, one per component.
Gradient — The direction and rate of steepest increase of a scalar field, as a vector field, estimated by sampling a small step either side along each axis.
Unpack Vector — One component of a vector field, as a scalar field.
Vector Angle — Angle in degrees between two vectors, from 0 to 180; a zero-length vector gives 0.