xBIM 高级01 IFC多模型合并

Posted 2021-12-22 savionzhang

多模型合并可以实现以下功能：

• 覆盖多个模型以表现得像一个模型
• 统一访问数据，就像它是单个模型一样
• 只读。要修改模型的内容，您必须使用特定模型
• 不限于单个模式（联合IFC2x3 + IFC4→将其作为IFC4接口查询）
• IFC联合可以存储为单个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",
                
                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
                federation.AddModelReference("SampleHouseExtension.ifc", "Tyna", "Extensions Builder"); //IFC2x3

                Console.WriteLine($"Model is federation: federation.IsFederation");
                Console.WriteLine($"Number of overall entities: federation.FederatedInstances.Count");
                Console.WriteLine($"Number of walls: federation.FederatedInstances.CountOf<IIfcWall>()");
                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<IIfcWall>()");
                

                // 保存为单一文件，工其他场景下使用
                federation.SaveAs("federation.ifc");
            
        
    

 控制台输出如下所示：

Model is federation: True
Number of overall entities: 50303
Number 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。这个惯例纯粹是我们的发明，所以它不适用于其他工具。但它允许您在系统中创建联合，并在需要时再次重新打开它们。

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;

 

参考：http://docs.xbim.net/examples/federating-models.html

2019-06-05