184.108.40.206.1 Semantic 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.
Figure 220.127.116.11.A illustrates parameters of the rectangle 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:
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).
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).
18.104.22.168.2 Entity inheritance
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.
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.
|HasExternalReference||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects||
Reference to external information, e.g. library, classification, or document information, which is associated with the profile.
|HasProperties||SET [0:?] OF IfcProfileProperties FOR ProfileDefinition||
Additional properties of the profile, for example mechanical properties.
Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.
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The extent of the rectangle in the direction of the x-axis.
The extent of the rectangle in the direction of the y-axis.
22.214.171.124.4 Property sets
126.96.36.199.5 Concept usage
|Property Sets for Profiles||General||
This concept can be applied to the following resources:
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188.8.131.52.6 Formal representation
ENTITY IfcRectangleProfileDef SUPERTYPE OF (ONEOF (IfcRectangleHollowProfileDef ,IfcRoundedRectangleProfileDef)) SUBTYPE OF (IfcParameterizedProfileDef); XDim : IfcPositiveLengthMeasure; YDim : IfcPositiveLengthMeasure; END_ENTITY;