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  • IfcCurveDim

    函数定义

    注:定义符合ISO/CD 10303-42:1992
    此函数检查各种子类型曲线的维数。它返回曲线实例中使用的基本点和方向的维数。
    注:本规范允许在相同的几何表示上下文中混合维度。
    IFC2x中增加的新函数

    EXPRESS Specification

    FUNCTION IfcCurveDim
    (Curve : IfcCurve)
           : IfcDimensionCount;
    
      IF ('IFCGEOMETRYRESOURCE.IFCLINE' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcLine.Pnt.Dim);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCCONIC' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcConic.Position.Dim);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCPOLYLINE' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcPolyline.Points[1].Dim);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCTRIMMEDCURVE' IN TYPEOF(Curve))
        THEN RETURN(IfcCurveDim(CurveIfcTrimmedCurve.BasisCurve));
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCCOMPOSITECURVE' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcCompositeCurve.Segments[1].Dim);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCBSPLINECURVE' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcBSplineCurve.ControlPointsList[1].Dim);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCOFFSETCURVE2D' IN TYPEOF(Curve))
        THEN RETURN(2); 
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCOFFSETCURVE3D' IN TYPEOF(Curve))
        THEN RETURN(3);
      END_IF;
      IF ('IFCGEOMETRYRESOURCE.IFCPCURVE' IN TYPEOF(Curve))
        THEN RETURN(3);
      END_IF;
      IF ('IFC4.IFCINDEXEDPOLYCURVE' IN TYPEOF(Curve))
        THEN RETURN(CurveIfcIndexedPolyCurve.Points.Dim);
      END_IF;
    RETURN (?); 
    END_FUNCTION;
    QQ 3087438119
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  • 原文地址:https://www.cnblogs.com/herd/p/14426749.html
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