Defined in File Ifc4x3_rc1.h
IfcCompositeProfileDef: public Ifc4x3_rc1::IfcProfileDef¶
The IfcCompositeProfileDef defines the profile by composition of other profiles. The composition is given by a set of at least two other profile definitions. Any profile definition (except for another composite profile) can be used to construct the composite.
HISTORY New entity in IFC2x.
Figure 314 illustrates the composite profile definition. The IfcCompositeProfileDef does not define an own position coordinate system, it is directly defined in the underlying coordinate system. The underlying coordinate system is defined by the swept surface or swept area solid that uses the profile definition. It is the xy plane of either:
Or in case of sectioned spines it is the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions. The IfcCompositeProfileDef is defined using other profile definitions. Those other profile definitions are directly inserted into the underlying coordinate system.
In case of parameterized profile definitions, the Position attribute of those standard profiles is used to place the profiles relatively to each other. In case of arbitrary profile definitions, each Cartesian coordinate is given directly within the underlying coordinate system.
NOTE The black coordinate axes show the underlying coordinate system of the swept surface or swept area solid.
Twin profiles special case
If twin profiles are modeled by profile composition, the base profile should only be specified once. It is then included into the composite profile directly and additionally indirectly via IfcMirroredProfileDef. For example, a double angle made of two L100x10 with 10mm air gap between them, i.e. a _||_ shape, can be modeled as
single_L : IfcLShapeProfileDef := IfcLShapeProfileDef(AREA, ‘L100X100X10’, IfcAxis2Placement2D(IfcCartesianPoint(((.100+.010)/2., .0)), ?), .100, .100, .010, .012, ?, 0., ?, ?); double_L : IfcCompositeProfileDef := IfcCompositeProfileDef(AREA, ‘double angle’, (single_L, IfcMirroredProfileDef(AREA, ?, single_L, ?)), ‘twin profile’);
The profiles which are used to define the composite profile.
Whether the optional attribute Label is defined for this IfcCompositeProfileDef.
The name by which the composition may be referred to. The actual meaning of the name has to be defined in the context of applications.