IfcRoundedRectangleProfileDef

BACnet MVD

#### IfcRoundedRectangleProfileDef

Natural language names

| abgerundetes Rechteckprofil - parameterisierte Definition
| Rounded Rectangle Profile Def

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcRoundedRectangleProfileDef |  |  |  |
Position |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### 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 374 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 374 — Rounded rectangle profile

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
6 | RoundingRadius | IfcPositiveLengthMeasure |  | Radius of the circular arcs by which all four corners of the rectangle are equally rounded. | X | 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 | B
--- | --- | --- | --- | --- | ---
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 | 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 | 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 | X
IfcRectangleProfileDef
4 | XDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the x-axis. | X | X
5 | YDim | IfcPositiveLengthMeasure |  | The extent of the rectangle in the direction of the y-axis. | X | X
IfcRoundedRectangleProfileDef
6 | RoundingRadius | IfcPositiveLengthMeasure |  | Radius of the circular arcs by which all four corners of the rectangle are equally rounded. | X | X

##### 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

`

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