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基础回顾

https://blog.csdn.net/liqian_ken/article/details/143867404
https://blog.csdn.net/liqian_ken/article/details/114851319

效果图

代码示例

1. 在前文基础上，增加一个工具方法：

public static IfcProductDefinitionShape CreateDiskSolidShape(IfcStore model)
{IfcSweptDiskSolid solid = model.Instances.New<IfcSweptDiskSolid>(so =>{// 为扫描模型创建扫描曲线so.Directrix = model.Instances.New<IfcTrimmedCurve>(c =>{c.SenseAgreement = false;c.MasterRepresentation = IfcTrimmingPreference.CARTESIAN;c.Trim1.Add(model.Instances.New<IfcCartesianPoint>(pt => pt.SetXYZ(0, 2000, 0)));c.Trim2.Add(model.Instances.New<IfcCartesianPoint>(pt => pt.SetXYZ(2000, 0, 0)));c.BasisCurve = model.Instances.New<IfcCircle>(x =>{x.Radius = 1000;x.Position = model.Instances.New<IfcAxis2Placement3D>(a =>{a.Location = model.Instances.New<IfcCartesianPoint>(pt => pt.SetXYZ(0, 0, 0));});});});so.Radius = 100;so.InnerRadius = 100;});var rep = model.Instances.New<IfcShapeRepresentation>(r =>{r.Items.Add(solid);});return model.Instances.New<IfcProductDefinitionShape>(s => s.Representations.Add(rep));
}

关于IFC裁剪线IfcTrimmedCurve的参数理解可以参考：https://blog.csdn.net/liyazhen2011/article/details/82259083

涉及了扫掠方向、圆心、半径的设置。

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2. 调用：

public void TestMethod1()
{var model = IfcUtil.MakeIfcStore();using (var tran = model.BeginTransaction()){var shape = IfcUtil.CreateDiskSolidShape(model);var arch = IfcUtil.CreateFlowFitting(model);arch.Representation = shape;var building = IfcUtil.CreateBuilding(model);building.AddElement(arch);var site = IfcUtil.CreateSite(model);site.AddBuilding(building);var project = IfcUtil.CreateProject(model);project.AddSite(site);tran.Commit();}model.SaveAs("./B.ifc");
}