TYPE: SOP
TITLE: Twist SOP

Twist produces generalized non-linear deformations such as bend, linear taper,
shear, squash and stretch, taper and twist. Each one will distort the object 
in one or more axis to variable degrees.

Parameters:

    Group          - Subset of geometry to deform.
    Operation      - Type of deformation.
    Primary Axis   - Deformations occur about the primary axis.
    Secondary Axis - Points along the secondary axis remain unchanged.
    Pivot          - Local origin of deformation.                   /px /py /pz
    Strength       - Strength of the deformation.                   /strength
    Rolloff        - Attenuation of deformation.                    /roll

Local Variables

    CEX, CEY, CEZ   - The centroid of the input
    XMIN, XMAX      - The X extents of the bounding box of the input
    YMIN, YMAX      - The Y extents of the bounding box of the input
    ZMIN, ZMAX      - The Z extents of the bounding box of the input
    SIZEX, SIZEY, SIZEZ - The size of the bounding box of the input
