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20252453-T-424 项目

4.2.8.1.1 中心线剖面定义（Centerline Profile Definition）

下图展示了应用此概念时使用的通用类和关系。

<a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCenterLineProfileDef.htm'>IfcCenterLineProfileDef</a> IfcCenterLineProfileDef 1. ProfileType [1:1] 2. ProfileName [0:1]      HasExternalReference [0:?]      HasProperties [0:?] 3. Curve [1:1] 4. Thickness [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProfileTypeEnum.htm'>IfcProfileTypeEnum</a> IfcProfileTypeEnum <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCenterLineProfileDef.htm'>IfcCenterLineProfileDef</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/IfcCenterLineProfileDef.htm'>IfcCenterLineProfileDef</a>:ProfileName1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLabel.htm'>IfcLabel</a>:IfcLabel0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcIndexedPolyCurve.htm'>IfcIndexedPolyCurve</a> IfcIndexedPolyCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [1:1] 2. Segments [1:?] 3. SelfIntersect [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCenterLineProfileDef.htm'>IfcCenterLineProfileDef</a>:Curve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcIndexedPolyCurve.htm'>IfcIndexedPolyCurve</a>:IfcIndexedPolyCurve0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPositiveLengthMeasure.htm'>IfcPositiveLengthMeasure</a> IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCenterLineProfileDef.htm'>IfcCenterLineProfileDef</a>:Thickness1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPositiveLengthMeasure.htm'>IfcPositiveLengthMeasure</a>:IfcPositiveLengthMeasure0
Figure 4.2.8.1.1.A