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boundary_curve

EXPRESS specification:

ENTITY boundary_curve
SUBTYPE OF ( composite_curve_on_surface);
WHERE
WRB13  :  SELF\composite_curve.closed_curve;
END_ENTITY;

References (3):

Name Type Referred through Express-G
composite_curve_on_surface Entity
Subtype
No Diagram
curve_bounded_surface Entity
Attribute 'boundaries'
No Diagram
outer_boundary_curve Entity
Supertype
No Diagram

Inheritance graph

ENTITY boundary_curve;
ENTITY representation_item;
name  :  label;
ENTITY geometric_representation_item;
DERIVE
dim  :  dimension_count :=  dimension_of(SELF);
ENTITY curve;
ENTITY bounded_curve;
ENTITY composite_curve;
segments  :  LIST [1:?] OF composite_curve_segment;
self_intersect  :  LOGICAL;
DERIVE
n_segments  :  INTEGER :=  SIZEOF(segments);
closed_curve  :  LOGICAL :=  segments[n_segments].transition <> discontinuous;
ENTITY composite_curve_on_surface;
DERIVE
basis_surface  :  SET [0:2] OF surface :=  get_basis_surface(SELF);
ENTITY boundary_curve;
END_ENTITY;