8.15.3.19 IfcRectangleProfileDef

Définition de profil rectangulaire
Rechteckprofil - parametrische Definition

IfcRectangleProfileDef defines a rectangle as the profile definition used by the swept surface geometry or the swept area solid. It is given by its X extent and its Y extent, and placed within the 2D position coordinate system, established by the Position attribute. It is placed centric within the position coordinate system.

HISTORY  New entity in IFC1.5.

Figure 372 illustrates parameters of the rectangle profile definition.

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 (for example, upper-left bound).

Parameter
The IfcRectangleProfileDef is defined within the position coordinate system, where the XDim defines the length measure for the length of the rectangle (half along the positive x-axis) and the YDim defines the length measure for the width of the rectangle (half along the positive y-axis).

Figure 372 — Rectangle profile


XSD Specification:

 <xs:element name="IfcRectangleProfileDef" type="ifc:IfcRectangleProfileDef" substitutionGroup="ifc:IfcParameterizedProfileDef" nillable="true"/>
 <xs:complexType name="IfcRectangleProfileDef">
  <xs:complexContent>
   <xs:extension base="ifc:IfcParameterizedProfileDef">
    <xs:attribute name="XDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="YDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcRectangleProfileDef
SUPERTYPE OF(ONEOF(IfcRectangleHollowProfileDef, IfcRoundedRectangleProfileDef))
SUBTYPE OF IfcParameterizedProfileDef;
XDim : IfcPositiveLengthMeasure;
YDim : IfcPositiveLengthMeasure;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

XDim : The extent of the rectangle in the direction of the x-axis.
YDim : The extent of the rectangle in the direction of the y-axis.

Inheritance Graph:

ENTITY IfcRectangleProfileDef
ENTITY IfcProfileDef
ProfileType : IfcProfileTypeEnum;
ProfileName : OPTIONAL IfcLabel;
INVERSE
HasExternalReference : SET OF IfcExternalReferenceRelationship FOR RelatedResourceObjects;
HasProperties : SET OF IfcProfileProperties FOR ProfileDefinition;
ENTITY IfcParameterizedProfileDef
Position : OPTIONAL IfcAxis2Placement2D;
ENTITY IfcRectangleProfileDef
XDim : IfcPositiveLengthMeasure;
YDim : IfcPositiveLengthMeasure;
END_ENTITY;

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