TYPE: SOP
TITLE: Force SOP

Force adds force attributes to the input metaball field that is used by either 
Particle or Spring as attractor or repulsion force fields. 
In general, force values greater than 0 cause points to be attracted, 
less than 0 cause points to be repelled.

This operation requires metaball input.

Parameters:

Radial Force
    Overview	  - Triggers force to radius of metaball field.
    Force         - Controls the strength of the radial force.      /radial
Directional Force
    Overview      - Allows control of force attributes.
    Direction     - Primary axis of metaball field.       /dirx /diry /dirz
    Axial Force   - Force along primary axis of field.              /axial
    Vortex Force  - Amount of twist around primary axis.            /vortex
    Spiral Force  - Attraction force perpendicular to axis.         /spiral

See Also: Metaball
