union PK_FACE_change_data_u
    {
    PK_FACE_change_data_offset_t    offset;    --- offset parameters
    PK_FACE_change_data_taper_t     taper;     --- taper parameters
    PK_FACE_change_data_transform_t transform; --- transform parameters
    PK_FACE_change_data_replace_t   replace;   --- replace parameters
    PK_FACE_change_data_blend_t     blend;     --- blend parameters
    };
typedef union PK_FACE_change_data_u PK_FACE_change_data_t;


This union groups the definition of all the different change operation
parameters used in PK_FACE_change.


Description of fields:



offset                 The operation parameter structure is interpretated as
                         an offset parameter structure.


taper                  The operation parameter structure is interpretated as
                         a taper parameter structure.


transform              The operation parameter structure is interpretated as
                         a transform parameter structure.


replace                The operation parameter structure is interpretated as
                         a replace-surface parameter structure.


blend                  The operation parameter structure is interpretated as
                         a blend parameter structure.