目录

    多个模型联合：统一访问数据，就好像是一个单一的模型，IFC 联合可以存储为IFC文件（在IfcStore中）

using System;using Xbim.Common.Step21;using Xbim.Ifc;using Xbim.Ifc4.Interfaces;namespace BasicExamples{    public class FederationExample    {        public void CreateFederation()        {            var editor = new XbimEditorCredentials            {                ApplicationDevelopersName = "You",                ApplicationFullName = "Your app",                ApplicationIdentifier = "Your app ID",                ApplicationVersion = "4.0",                //your user                EditorsFamilyName = "Santini Aichel",                EditorsGivenName = "Johann Blasius",                EditorsOrganisationName = "Independent Architecture"            };            using (var federation = IfcStore.Create(editor, IfcSchemaVersion.Ifc4, XbimStoreType.InMemoryModel))            {                 federation.AddModelReference("SampleHouse.ifc", "Bob The Builder", "Original Constructor"); //IFC4 文件                federation.AddModelReference("SampleHouseExtension.ifc", "Tyna", "Extensions Builder"); //IFC2x3  文件                Console.WriteLine($"Model is federation: {federation.IsFederation}");                Console.WriteLine($"Number of overall entities: {federation.FederatedInstances.Count}");                Console.WriteLine($"Number of walls: {federation.FederatedInstances.CountOf
     
      ()}");                foreach (var refModel in federation.ReferencedModels)                {                    Console.WriteLine();                    Console.WriteLine($"    Referenced model: {refModel.Name}");                    Console.WriteLine($"    Referenced model organization: {refModel.OwningOrganisation}");                    Console.WriteLine($"    Number of walls: {refModel.Model.Instances.CountOf
      
       ()}");                }                //保存IFC文件                federation.SaveAs("federation.ifc");            }        }    }}
      
     

控制台输出

Model is federation: TrueNumber of overall entities: 50303Number of walls: 8    Referenced model: SampleHouse.ifc    Referenced model organization: Bob The Builder    Number of walls: 5    Referenced model: SampleHouseExtension.ifc    Referenced model organization: Tyna    Number of walls: 3

保存为IFC文件的联合设置如下所示。这个惯例是xBIM 发明的。所以不能与其他的工具操作。

ISO-10303-21;HEADER;FILE_DESCRIPTION ((''), '2;1');FILE_NAME ('', '2016-10-27T13:14:43', (''), (''), 'Xbim File Processor version 3.2.0.0', 'Xbim version 3.2.0.0', '');FILE_SCHEMA (('IFC4'));ENDSEC;DATA;#1=IFCACTORROLE(.USERDEFINED.,'Original Constructor',$);#2=IFCORGANIZATION($,'Bob The Builder',$,(#1),$);#3=IFCDOCUMENTINFORMATION('1','SampleHouse.ifc',$,$,$,'XbimReferencedModel',$,$,#2,$,$,$,$,$,$,$,$);#4=IFCACTORROLE(.USERDEFINED.,'Extensions Builder',$);#5=IFCORGANIZATION($,'Tyna',$,(#4),$);#6=IFCDOCUMENTINFORMATION('2','SampleHouseExtension.ifc',$,$,$,'XbimReferencedModel',$,$,#5,$,$,$,$,$,$,$,$);ENDSEC;END-ISO-10303-21;