PK_TOPOL_facet

PK_ERROR_code_t                 PK_TOPOL_facet
(
--- received arguments ---
const int                        n_topols,        --- number of entities
const PK_TOPOL_t                 topols[],        --- entities to be facetted
const PK_TRANSF_t                topol_transfs[], --- applied transformations
const PK_TRANSF_t                view_transf,     --- viewing transformation
const PK_TOPOL_facet_o_t        *options,         --- options structure

--- returned arguments ---
PK_TOPOL_facet_r_t        *const tables           --- addr of tabular structure
)


Generate a facetted representation of topological entities in tabular form

NOTE: This function is deprecated and has been superseded by PK_TOPOL_facet_2.



Specific Errors:
    PK_ERROR_duplicate_array_item   topol has duplicates but no transf array
                                    (MILD)
    PK_ERROR_bad_component          topol or view transf is inappropriate
                                    (MILD)
    PK_ERROR_general_body           PK_facet_match_topol_c option can't be used
                                    (MILD)
    PK_ERROR_field_of_wrong_type    PK_facet_match_topol_c requires cull_none_c
                                    (MILD)
    PK_ERROR_unsuitable_topology    entity in topols array is not face or body
                                    (MILD)
    PK_ERROR_function_not_exclusive 'incremental_facetting' option value is
                                    incompatible with the function running
                                    concurrently in a thread without locked
                                    partitions (MILD)


See here for more information.

Each received topological entity can be a general, solid or a sheet body or
face, if any other type of topological entity appears in 'topols' the error
PK_ERROR_unsuitable_topology will be returned.

If 'topol_transfs' is set to NULL the 'topols' entities are not transformed
(and the 'topols' array cannot contain duplicates).

If 'topol_transfs' is not NULL, it is an array of PK_TRANSF_t entities of
length 'n_topols'. The 'topols' array can contain duplicates in this case.
Each entity in 'topols' is transformed by its corresponding entity in
'topol_transfs'. Any entry in the 'topol_transfs' array can be PK_ENTITY_null,
indicating that the corresponding entity in 'topols' is not to be transformed.
Transforms may only contain translation and rotation components. Reflections,
scales and shears are not allowed.

The 'view_transf' argument is only used when generating view-dependent facet
data for the back face culling and the increased local silhouette density
options.  The 'view_transf' may contain perspective components but the
perspective will only be taken into account for back face culling; for
increased local silhouette density only the directional component of the
'view_transf' will be used.

Facet vertex coordinates are always generated in world coordinates even when
a viewing transform entity is provided (such data must be transformed into
the viewing coordinate system before display).

The PK_TOPOL_facet_o_t options structure defines two sets of controls

    1) how the facet mesh is generated
    2) which mesh data are returned to the application.

The mesh generation options include parameters such as the maximum number
of sides per facet and the tolerance values which are to be used when
approximating surfaces by planar facets.

The data selection options indicate whether the function should calculate
and return the following data to the application in tabular form :

 -  topological data (e.g. which vertices are used to construct which facets)

 -  geometric data   (e.g. values of vertex coordinates and normals),

 -  tracking data    (e.g. which facets were derived from which face entities)

 -  error data       (e.g. which entities fail to meet tolerance criteria)

The data selection options are defined as fields of a PK_TOPOL_facet_choice_o_t
structure, set to   PK_LOGICAL_true   or  PK_LOGICAL_false  indicating whether
the application requires Parasolid to calculate and return the associated data.

Each data selection field name in the PK_TOPOL_facet_choice_o_t structure
is matched by a field name in the returned PK_TOPOL_facet_r_t structure,
returning details of the underlying topological, geometric, associative
or error data in tabular form.

The following restrictions apply when generating facet data:

    - if topology edge matching is on, the 'cull' option must not be used

    - if topology edge matching is on, a general body will not be facetted

    - the 'view_transf' matrix may not contain reflections, scales or shear
      components.

    - the silhouette density option PK_facet_density_use_view_c only uses the
      directional component of the viewing transform entity (and it assumes a
      parallel view).  If multiple view_directions are supplied via the option
      'view_directions', these directions will override the 'view_transf'.

    - if incremental facetting is on then only geometry matching is allowed.

    - if the function is running concurrently in a thread without locked
      partitions then incremental facetting must be off.