IfcCircleProfileDef

Semantic definitions at the entity

Entity definition

IfcCircleProfileDef defines a circle as the profile definition used by the swept surface geometry or by the swept area solid. It is given by its Radius attribute and placed within the 2D position coordinate system, established by the Position attribute.

HISTORY New entity in IFC1.5.

Figure 385 illustrates parameters for the circle profile definition. The parameterized profile defines its own position 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:

IfcSweptSurface.Position
IfcSweptAreaSolid.Position

Or in case of sectioned spines, it is the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions. By using offsets of the position location, the parameterized profile can be positioned centric (using x,y offsets = 0.), or at any position relative to the profile. Explicit coordinate offsets are used to define cardinal points (e.g. upper-left bound). The Position attribute defines the 2D position coordinate system of the circle.
The Radius attribute defines the radius of the circle.

Figure 385 — Circle profile

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
4	Radius	IfcPositiveLengthMeasure	[1:1]	The radius of the circle.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcProfileDef
1	ProfileType	IfcProfileTypeEnum	[1:1]	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.	X
2	ProfileName	IfcLabel	[0:1]	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.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	S[0:?]	Reference to external information, e.g. library, classification, or document information, which is associated with the profile.	X
	HasProperties	IfcProfileProperties @ProfileDefinition	S[0:?]	Additional properties of the profile, for example mechanical properties.	X
IfcParameterizedProfileDef
3	Position	IfcAxis2Placement2D	[0:1]	Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.	X
IfcCircleProfileDef
4	Radius	IfcPositiveLengthMeasure	[1:1]	The radius of the circle.	X

Definitions applying to Common Use Definitions

Concept inheritance

#	Concept	Model View
IfcProfileDef
	Property Sets for Objects	Common Use Definitions

Examples

Slab openings

Formal representations

XSD Specification

 <xs:element name="IfcCircleProfileDef" type="ifc:IfcCircleProfileDef" substitutionGroup="ifc:IfcParameterizedProfileDef" nillable="true"/>

 <xs:complexType name="IfcCircleProfileDef">

  <xs:complexContent>

   <xs:extension base="ifc:IfcParameterizedProfileDef">

    <xs:attribute name="Radius" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcCircleProfileDef

 SUPERTYPE OF(IfcCircleHollowProfileDef)

 SUBTYPE OF (IfcParameterizedProfileDef);

  Radius : IfcPositiveLengthMeasure;

END_ENTITY;

 EXPRESS-G diagram

Link to this page

Item	Change	Description
IFC2x3 to IFC4
IfcCircleProfileDef
Position	MODIFIED	Instantiation changed to OPTIONAL.

	Kreisprofil - parametrische Definition
	Circle Profile Def
	Définition de profil circulaire