IFC 4.3.2.20260412 (IFC4X3_ADD2) under development

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4.2.2.1.8 Curve Segment Vertical

The enumeration of curve segments intended for use in the context of an IfcGradientCurve representing vertical alignment geometry.

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

G <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCurveSegment.htm'>IfcCurveSegment</a> IfcCurveSegment      LayerAssignment [0:1]      StyledByItem [0:1] 1. Transition [1:1]      UsingCurves [1:?] 2. Placement [1:1] 3. SegmentStart [1:1] 4. SegmentLength [1:1] 5. ParentCurve [1:1] Arc_Segment Arc Segment <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCurveSegment.htm'>IfcCurveSegment</a>->Arc_Segment Clothoid_Transition_Segment Clothoid Transition Segment <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCurveSegment.htm'>IfcCurveSegment</a>->Clothoid_Transition_Segment Linear_Segment Linear Segment <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCurveSegment.htm'>IfcCurveSegment</a>->Linear_Segment Parabolic_Transition_Segment Parabolic Transition Segment <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCurveSegment.htm'>IfcCurveSegment</a>->Parabolic_Transition_Segment
Figure 4.2.2.1.8.A

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