IfcRoundedRectangleProfileDef

Semantic definitions at the entity

Entity definition

IfcRoundedRectangleProfileDef defines a rectangle with equally rounded corners as the profile definition used by the swept surface geometry or the swept area solid. It is given by the X extent, the Y extent, and the radius for the rounded corners, and placed within the 2D position coordinate system, established by the Position attribute. It is placed centric within the position coordinate system, that is, in the center of the bounding box.

HISTORY New entity in IFC2x.

IFC2x CHANGE The IfcRoundedRectangleProfileDef is now subtyped from IfcRectangleProfileDef. The XDim and YDim attributes have been removed (now inherited from supertype).

Figure 576 illustrates parameters of the rounded rectangle profile definition.

Position
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 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).

Parameter
The IfcRoundedRectangleProfileDef is defined within the position coordinate system, where the XDim defines the measure for the length of the rectangle (half along the positive x-axis), the YDim defines the length measure for the width of the rectangle (half along the positive y-axis) and the RoundingRadius defines the radius of curvature in all four corners of the rectangle.

Figure 576 — Rounded rectangle profile

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
6	RoundingRadius	IfcPositiveLengthMeasure		Radius of the circular arcs by which all four corners of the rectangle are equally rounded.	X

Formal Propositions

Rule	Description
ValidRadius	The value of the attribute RoundingRadius shall be lower or equal than either of both, half the value of the Xdim and the YDim attribute.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcProfileDef
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.	X
2	ProfileName	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.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	S[0:?]	Reference to external information, e.g. library, classification, or document information, which is associated with the profile. IFC4 CHANGE New inverse attribute	X
	HasProperties	IfcProfileProperties @ProfileDefinition	S[0:?]	Additional properties of the profile, for example mechanical properties. IFC4 CHANGE New inverse attribute	X
IfcParameterizedProfileDef
3	Position	IfcAxis2Placement2D	?	Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.	X
IfcRectangleProfileDef
4	XDim	IfcPositiveLengthMeasure		The extent of the rectangle in the direction of the x-axis.	X
5	YDim	IfcPositiveLengthMeasure		The extent of the rectangle in the direction of the y-axis.	X
IfcRoundedRectangleProfileDef
6	RoundingRadius	IfcPositiveLengthMeasure		Radius of the circular arcs by which all four corners of the rectangle are equally rounded.	X

#	Concept	Template	Model View
IfcProfileDef
	Property Sets for Objects	Property Sets for Objects	General Usage

Formal representations

XML Specification

 <xs:element name="IfcRoundedRectangleProfileDef" type="ifc:IfcRoundedRectangleProfileDef" substitutionGroup="ifc:IfcRectangleProfileDef" nillable="true"/>

 <xs:complexType name="IfcRoundedRectangleProfileDef">

  <xs:complexContent>

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

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

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRoundedRectangleProfileDef

 SUBTYPE OF (IfcRectangleProfileDef);

  RoundingRadius : IfcPositiveLengthMeasure;

 WHERE

  ValidRadius : ((RoundingRadius <= (SELF\IfcRectangleProfileDef.XDim/2.)) AND 

 (RoundingRadius <= (SELF\IfcRectangleProfileDef.YDim/2.)));
END_ENTITY;

 EXPRESS-G diagram

	abgerundetes Rechteckprofil - parameterisierte Definition
	Rounded Rectangle Profile Def

Item	Change	Description
IFC2x3 to IFC4 4.0.0.0
IfcRoundedRectangleProfileDef
Position	MODIFIED	Instantiation changed to OPTIONAL.

IfcRoundedRectangleProfileDef

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to General Usage

Formal representations