IFC 4.3.0.1 (IFC4X3) development

8.15.3.14 IfcMirroredProfileDef

8.15.3.14.1 Semantic definition

The IfcMirroredProfileDef defines the profile by mirroring the parent profile about the y axis of the parent profile coordinate system. That is, left and right of the parent profile are swapped.

Notes:

IfcMirroredProfileDef is primarily useful together with IfcCShapeProfileDef, IfcLShapeProfileDef, IfcUShapeProfileDef, or IfcZShapeProfileDef as parent profile but can be used with other parent profile types as well.

Mirroring of an IfcParameterizedProfileDef is performed after translation and rotation according to its Position attribute. For example, if the parent profile's Position offsets it by half of its width to the right, then the mirrored profile will be offset by half of its width to the left.

Mirroring about the x axis, i.e. swapping top and bottom, can be achieved by mirroring about the y axis coupled with 180 degree rotation about the z axis. In general, rotation happens in a containing object such as IfcSweptAreaSolid, i.e. after mirroring by IfcMirroredProfileDef was performed. If the parent profile is an IfcParameterizedProfileDef, rotation can alternatively happen already in the parent profile by means of its Position attribute, i.e. before mirroring by IfcMirroredProfileDef was performed.

8.15.3.14.2 Entity inheritance

8.15.3.14.3 Attributes

# Attribute Type Description
IfcProfileDef (4)
1 ProfileType IfcProfileTypeEnum

Defines the type of geometry into which this profile definition shall be resolved, either a curve or a surface area. In case of curve the profile should be referenced by a swept surface, in case of area the profile should be referenced by a swept area solid.

2 ProfileName OPTIONAL IfcLabel

Human-readable name of the profile, for example according to a standard profile table. As noted above, machine-readable standardized profile designations should be provided in IfcExternalReference.ItemReference.

HasExternalReference SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects

Reference to external information, e.g. library, classification, or document information, which is associated with the profile.

HasProperties SET [0:?] OF IfcProfileProperties FOR ProfileDefinition

Additional properties of the profile, for example mechanical properties.

IfcDerivedProfileDef (3)
3 ParentProfile IfcProfileDef

The parent profile provides the origin of the transformation.

4 Operator IfcCartesianTransformationOperator2D

Transformation operator applied to the parent profile.

5 Label OPTIONAL IfcLabel

The name by which the transformation may be referred to. The actual meaning of the name has to be defined in the context of applications.

Click to show 7 hidden inherited attributes Click to hide 7 inherited attributes
IfcMirroredProfileDef (1)
4* Operator IfcCartesianTransformationOperator2D

This attribute is formally derived.

IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
IfcCartesianTransformationOperator(
    -- Axis1
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcDirection([-1., 0.]),
    -- Axis2
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcDirection([ 0., 1.]),
    -- LocalOrigin
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcPoint() || IfcCartesianPoint([0., 0.]),
    -- Scale
    1.) ||
IfcCartesianTransformationOperator2D()
Table 8.15.3.14.A

8.15.3.14.4 Property sets

  • Pset_ProfileMechanical
    • MassPerLength
    • CrossSectionArea
    • Perimeter
    • MinimumPlateThickness
    • MaximumPlateThickness
    • CentreOfGravityInX
    • CentreOfGravityInY
    • ShearCentreZ
    • ShearCentreY
    • MomentOfInertiaY
    • MomentOfInertiaZ
    • MomentOfInertiaYZ
    • TorsionalConstantX
    • WarpingConstant
    • ShearDeformationAreaZ
    • ShearDeformationAreaY
    • MaximumSectionModulusY
    • MinimumSectionModulusY
    • MaximumSectionModulusZ
    • MinimumSectionModulusZ
    • TorsionalSectionModulus
    • ShearAreaZ
    • ShearAreaY
    • PlasticShapeFactorY
    • PlasticShapeFactorZ

8.15.3.14.5 Concept usage

Concept Usage Description
IfcProfileDef (1)
Property Sets for Profiles General

This concept can be applied to the following resources:

Click to show 1 hidden inherited concepts Click to hide 1 inherited concepts
Table 8.15.3.14.B

8.15.3.14.6 Formal representation

ENTITY IfcMirroredProfileDef
 SUBTYPE OF (IfcDerivedProfileDef);
 DERIVE
	 SELF\IfcDerivedProfileDef.Operator : IfcCartesianTransformationOperator2D := 
IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
IfcCartesianTransformationOperator(
    -- Axis1
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcDirection([-1., 0.]),
    -- Axis2
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcDirection([ 0., 1.]),
    -- LocalOrigin
    IfcRepresentationItem() || IfcGeometricRepresentationItem() ||
    IfcPoint() || IfcCartesianPoint([0., 0.]),
    -- Scale
    1.) ||
IfcCartesianTransformationOperator2D();
END_ENTITY;

8.15.3.14.7 References

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8.15.3.14.8 Changelog

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