The force field related sentences, like the Maya field, fluid, are not support indexing techniques. Because we make them support composition of forces.
Imagine that there are several fields in scene. At this time, channels like the "maya field point ..." will NOT return an array contain each result from each field. Instead, it will return only one result based on the composition of force field.
Like the following example, the 3 red vectors are the initial forces from 3 fields. The orange vector is the composition force of f1 and f2, and the Green vector is the final composition force vector from f1, f2 and f3.
Sentence "maya field point ..." will return angle between the blue vector (agent Z-axis) and the green vector (Force Composition result), which value angle ϴ (RIGHT).
Composition of forces f1, f2, f3 => F1+2+3