IFC 4.3.2.20260213 (IFC4X3_ADD2) under development

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4.2.8.1.2 CompositeCurve Profile Definition

Composite curve profile definitions define the closed two-dimensional curve used for the cross-section by a composite curve, consisting of multiple composite curve segments. Each composite curve segment has a parent curve, being either a polyline or a trimmed curve. Trimmed curves have basis curves of type line, circle or ellipse.

The following diagram shows the generic classes and relationships used when applying this concept.

G <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a> IfcArbitraryProfileDefWithVoids 1. ProfileType [1:1] 2. ProfileName [0:1]      HasExternalReference [0:?]      HasProperties [0:?] 3. OuterCurve [1:1] 4. InnerCurves [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProfileTypeEnum.htm'>IfcProfileTypeEnum</a> IfcProfileTypeEnum <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:ProfileType1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProfileTypeEnum.htm'>IfcProfileTypeEnum</a>:IfcProfileTypeEnum0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLabel.htm'>IfcLabel</a> IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:ProfileName1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLabel.htm'>IfcLabel</a>:IfcLabel0 IfcCompositeCurve_0 IfcCompositeCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Segments [1:?] 2. SelfIntersect [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:OuterCurve1->IfcCompositeCurve_0:IfcCompositeCurve0 IfcCompositeCurve_1 IfcCompositeCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Segments [1:?] 2. SelfIntersect [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:InnerCurves1->IfcCompositeCurve_1:IfcCompositeCurve0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a> IfcCompositeCurveSegment      LayerAssignment [0:1]      StyledByItem [0:1] 1. Transition [1:1]      UsingCurves [1:?] 2. SameSense [1:1] 3. ParentCurve [1:1] IfcCompositeCurve_0:Segments1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:IfcCompositeCurveSegment0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTransitionCode.htm'>IfcTransitionCode</a> IfcTransitionCode <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:Transition1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTransitionCode.htm'>IfcTransitionCode</a>:IfcTransitionCode0 IfcBoolean_0 IfcBoolean <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:SameSense1->IfcBoolean_0:IfcBoolean0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a> IfcTrimmedCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. BasisCurve [1:1] 2. Trim1 [1:2] 3. Trim2 [1:2] 4. SenseAgreement [1:1] 5. MasterRepresentation [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:ParentCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:IfcTrimmedCurve0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a> IfcPolyline      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [2:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a>:IfcPolyline0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a> IfcCircle      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. Radius [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:IfcCircle0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a> IfcEllipse      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. SemiAxis1 [1:1] 3. SemiAxis2 [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:IfcEllipse0 IfcCartesianPoint_1 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim11->IfcCartesianPoint_1:IfcCartesianPoint0 IfcParameterValue_0 IfcParameterValue <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim11->IfcParameterValue_0:IfcParameterValue0 IfcCartesianPoint_2 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim21->IfcCartesianPoint_2:IfcCartesianPoint0 IfcParameterValue_1 IfcParameterValue <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim21->IfcParameterValue_1:IfcParameterValue0 IfcBoolean_1 IfcBoolean <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:SenseAgreement1->IfcBoolean_1:IfcBoolean0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmingPreference.htm'>IfcTrimmingPreference</a> IfcTrimmingPreference <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:MasterRepresentation1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmingPreference.htm'>IfcTrimmingPreference</a>:IfcTrimmingPreference0 IfcCartesianPoint_0 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a>:Points1->IfcCartesianPoint_0:IfcCartesianPoint0 IfcAxis2Placement2D_0 IfcAxis2Placement2D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. RefDirection [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:Position1->IfcAxis2Placement2D_0:IfcAxis2Placement2D0 IfcPositiveLengthMeasure_0 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:Radius1->IfcPositiveLengthMeasure_0:IfcPositiveLengthMeasure0 IfcAxis2Placement2D_1 IfcAxis2Placement2D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. RefDirection [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:Position1->IfcAxis2Placement2D_1:IfcAxis2Placement2D0 IfcPositiveLengthMeasure_1 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:SemiAxis11->IfcPositiveLengthMeasure_1:IfcPositiveLengthMeasure0 IfcPositiveLengthMeasure_2 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:SemiAxis21->IfcPositiveLengthMeasure_2:IfcPositiveLengthMeasure0
Figure 4.2.8.1.2.A

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