IfcRoundedRectangleProfileDef

Natural language names
abgerundetes Rechteckprofil - parameterisierte Definition
Rounded Rectangle Profile Def
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcRoundedRectangleProfileDef
      PositionMODIFIEDInstantiation 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 431 illustrates parameters of the rounded rectangle profile definition.

rounded rectangle profile

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 431 — Rounded rectangle profile

Attribute definitions
#AttributeTypeCardinalityDescription G
6RoundingRadiusIfcPositiveLengthMeasure Radius of the circular arcs by which all four corners of the rectangle are equally rounded.X
Formal Propositions
RuleDescription
ValidRadiusThe 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 IfcRectangleProfileDef IfcParameterizedProfileDef IfcProfileDef
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcProfileDef
1ProfileTypeIfcProfileTypeEnum 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
2ProfileNameIfcLabel? 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
HasExternalReferenceIfcExternalReferenceRelationship
@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
HasPropertiesIfcProfileProperties
@ProfileDefinition
S[0:?]Additional properties of the profile, for example mechanical properties.
IFC4 CHANGE New inverse attribute
X
IfcParameterizedProfileDef
3PositionIfcAxis2Placement2D? Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied. X
IfcRectangleProfileDef
4XDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the x-axis.X
5YDimIfcPositiveLengthMeasure The extent of the rectangle in the direction of the y-axis.X
IfcRoundedRectangleProfileDef
6RoundingRadiusIfcPositiveLengthMeasure Radius of the circular arcs by which all four corners of the rectangle are equally rounded.X
Definitions applying to General Usage

Concept inheritance

#ConceptTemplateModel View
IfcProfileDef
Property Sets for ObjectsProperty Sets for ObjectsGeneral 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;

Link to EXPRESS-G diagram EXPRESS-G diagram

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