Class Ifc4::IfcCurveBoundedSurface¶
Defined in File Ifc4.h
Nested Relationships¶
This class is a nested type of Struct Ifc4.
Inheritance Relationships¶
Base Type¶
public Ifc4::IfcBoundedSurface
(Class Ifc4::IfcBoundedSurface)
Class Documentation¶

class
Ifc4
::
IfcCurveBoundedSurface
: public Ifc4::IfcBoundedSurface¶ Definition from ISO/CD 1030342:1992 The curve bounded surface is a parametric surface with curved boundaries defined by one or more boundary curves. One of the boundary curves may be the outer boundary; any number of inner boundaries is permissible. The region of the curve bounded surface in the basis surface is defined to be the portion of the basis surface in the direction of N x T from any point on the boundary, where N is the surface normal and T the boundary curve tangent vector at this point. The region so defined shall be arcwise connected.
The IfcCurveBoundedSurface is a parametric surface with boundaries defined by pcurves, that is, a curve which lies on the basis of a surface and is defined in the parameter space of that surface. The pcurve is a special type of a composite curve segment and shall only be used to bound a surface.
The outer boundary shall be either defined by:
an IfcOuterBoundaryCurve, a closed composite curve on surface for the definition of an outer boundary, then the attribute ImplicitOuter has to be set to FALSE, or by the implicit boundary of the bounded surface, e.g. the u1, u2, v1, v2 of IfcRectangularTrimmedSurface< then the attribute ImplicitOuter has to be set to TRUE. Note that some surfaces, like IfcCylindricalSurface does not have identifiable implicit boundaries.
NOTE Corresponding STEP entity: curve_bounded_surface. Please refer to ISO/IS 1030342:1994, p.87 for the final definition of the formal standard.
HISTORY New entity in IFC2x4.
Informal Propositions
Each curve in the set of Boundaries shall be closed. No two curves in the set of Boundaries shall intersect. At most one of the boundary curves may enclose any other boundary curve. If an IfcOuterBoundaryCurve is designated, only that curve may enclose any other boundary curve.
Public Types

typedef IfcTemplatedEntityList<IfcCurveBoundedSurface>
list
¶
Public Functions

::Ifc4::IfcSurface *
BasisSurface
() const¶ The surface to be bounded.

void
setBasisSurface
(::Ifc4::IfcSurface *v)¶

IfcTemplatedEntityList<::Ifc4::IfcBoundaryCurve>::ptr
Boundaries
() const¶ The outer boundary of the surface.

void
setBoundaries
(IfcTemplatedEntityList<::Ifc4::IfcBoundaryCurve>::ptr v)¶

bool
ImplicitOuter
() const¶

void
setImplicitOuter
(bool v)¶

IfcCurveBoundedSurface
(IfcEntityInstanceData *e)¶

IfcCurveBoundedSurface
(::Ifc4::IfcSurface *v1_BasisSurface, IfcTemplatedEntityList<::Ifc4::IfcBoundaryCurve>::ptr v2_Boundaries, bool v3_ImplicitOuter)¶

typedef IfcTemplatedEntityList<IfcCurveBoundedSurface>