BLECHK ( edges, full, nerror, errors, erreds, topols, ifail )
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Check the local validity of unfixed blends.
Receives:
KI_tag_list_edge *edges --- edges to check
int *full --- level of checking
Returns:
KI_int_nitems *nerror --- number of invalid blends
<KI_tag_list_int> *errors --- list of failure codes, the
--- codes are given below
<KI_tag_list_edge> *erreds --- list of invalid edges
<KI_tag_list_entity> *topols --- list of tags associated with
--- the failure codes
KI_cod_error *ifail --- failure code
Specific errors:
KI_general_body general body
KI_bad_spec_code value of 'full' out of range
Description:
This is a diagnostic function, used to determine why BLEFIX failed, or whether
an alteration in an unfixed blend has removed a problem.
For each edge in 'edges' that has a blend attribute attached the associated
blending surface parameters are checked for consistency with geometry and
blend attributes attached to neighbouring entities. Edges in 'edges' that have
no blend attribute attached are ignored.
If 'full' is 1, the blending surface parameters are checked for consistency at
the vertices. If 'full' is 2, additional checks are made to ensure that the
blend boundaries are legal. Even if BLECHK finds no inconsistencies, the
blends are not guaranteed to fix; some problems can only be detected by BLEFIX
making up the new faces.
'nerror' is the number of edges in 'edges' for which blending errors have been
found. The list 'erreds' contains the tags of those edges for which errors were
found and 'errors' and 'topols' are two parallel lists of failure codes and
associated topology tags.
Some failure codes have no associated entity: in these cases the entry in
'topols' will be the null tag. The meanings of the failure codes in the
'errors' list and the corresponding types of entity in the 'topols' list are as
follows:
code explanation tag type
BLCCTN Blend on tangent edge is not legal. -
BLCCSN Blend ending on a surface singularity is not legal. TYTOVX
BLCCOT Unsupported version 1 or 2 blend type. -
BLCCMX Configuration of edges at vertex too complex. TYTOVX
BLCCRS Edge being blended is on boundary of sheet. -
BLCCRE Edge being blended has non-manifold vertex. TYTOVX
BLCCTV Blend ends on illegal two edge vertex. TYTOVX
BLCCHM Edge geometry unsuited to asymmetric chamfer ranges. -
BLCCXT Blend requires invalid extension of B-surface. TYTOFA
BLCCIR Range inconsistent with adjacent blended edge. TYTOED
BLCCIT Type of blend inconsistent with adjacent blended edge. TYTOED
BLCCAB Adjoining edge not blended. TYTOED
BLCCOL Blend completely overlaps edge loop. -
BLCCOB Overlapping blends. -
BLCCOU Unblended edge overlapped by blend. TYTOED
BLCCUN Unspecified numerical problem with blend. -
BLCCUE Undetermined problem at end of blend. TYTOVX
BLCCRL Range of blend on face too large. TYTOFA
BLCCOE Illegal overlap on end boundary. TYTOVX
BLCCIE Blend has illegal end boundary. TYTOVX
BLCCIX Cannot intersect chamfers at this vertex. TYTOVX
BLCCEX End boundary intersects unblended edge. TYTOED
BLCCOI Illegal blend on another edge prevented full check. TYTOED
BLCCIP Cliffedge blend range inconsistent with cliff edge. -
This function is not supported for edges on general bodies.
