使用编码的形式去生成一堵墙的模型需要做很多的工作。
1 using System; 2 using System.Collections.Generic; 3 using System.Diagnostics; 4 using System.Linq; 5 using Xbim.Common; 6 using Xbim.Common.Step21; 7 using Xbim.Ifc; 8 using Xbim.IO; 9 using Xbim.Ifc4.ActorResource; 10 using Xbim.Ifc4.DateTimeResource; 11 using Xbim.Ifc4.ExternalReferenceResource; 12 using Xbim.Ifc4.PresentationOrganizationResource; 13 using Xbim.Ifc4.GeometricConstraintResource; 14 using Xbim.Ifc4.GeometricModelResource; 15 using Xbim.Ifc4.GeometryResource; 16 using Xbim.Ifc4.Interfaces; 17 using Xbim.Ifc4.Kernel; 18 using Xbim.Ifc4.MaterialResource; 19 using Xbim.Ifc4.MeasureResource; 20 using Xbim.Ifc4.ProductExtension; 21 using Xbim.Ifc4.ProfileResource; 22 using Xbim.Ifc4.PropertyResource; 23 using Xbim.Ifc4.QuantityResource; 24 using Xbim.Ifc4.RepresentationResource; 25 using Xbim.Ifc4.SharedBldgElements; 26 27 28 namespace HelloWall 29 { 30 class Program 31 { 32 /// <summary> 33 /// 此示例演示了创建包含单个标准事例墙的符合IFC模型的最小步骤。 34 /// </summary> 35 static int Main() 36 { 37 // 首先创建并初始化一个名为hello wall的模型 38 Console.WriteLine("Initialising the IFC Project 初始化 IFc 项目...."); 39 using (var model = CreateandInitModel("HelloWall")) 40 { 41 if (model != null) 42 { 43 IfcBuilding building = CreateBuilding(model, "Default Building 默认建筑"); 44 IfcBuildingStorey storey = CreateStorey(building); 45 IfcWallStandardCase wall = CreateWall(model, 4000, 300, 2400); 46 47 if(wall != null) 48 { 49 AddPropertiesToWall(model, wall); 50 } 51 using (var txn = model.BeginTransaction("Add Wall 添加墙")) 52 { 53 building.AddToSpatialDecomposition(storey); 54 storey.AddElement(wall); 55 txn.Commit(); 56 } 57 58 if (wall != null) 59 { 60 try 61 { 62 Console.WriteLine("Standard Wall successfully created...."); 63 64 model.SaveAs("HelloWallIfc4.ifc", StorageType.Ifc); // 保存到文件中 65 66 Console.WriteLine("HelloWallIfc4.ifc has been successfully written"); 67 } 68 catch (Exception e) 69 { 70 Console.WriteLine("Failed to save HelloWall.ifc"); 71 Console.WriteLine(e.Message); 72 } 73 } 74 } 75 else 76 { 77 Console.WriteLine("Failed to initialise the model"); 78 } 79 } 80 Console.WriteLine("Press any key to exit to view the IFC file...."); 81 Console.ReadKey(); 82 LaunchNotepad("HelloWallIfc4.ifc"); 83 return 0; 84 } 85 86 private static IfcBuildingStorey CreateStorey(IfcBuilding building) 87 { 88 var model = building.Model; 89 IfcBuildingStorey storey; 90 using (var txn = model.BeginTransaction("Storey creation")) 91 { 92 storey = model.Instances.New<IfcBuildingStorey>(s => 93 { 94 s.Name = "Default storey"; 95 s.Elevation = 0.0; 96 }); 97 txn.Commit(); 98 } 99 return storey; 100 } 101 102 /// <summary> 103 /// 在记事本中打开指定的文件 104 /// </summary> 105 /// <param name="fileName"></param> 106 private static void LaunchNotepad(string fileName) 107 { 108 try 109 { 110 var p = new Process { StartInfo = { FileName = fileName, CreateNoWindow = false } }; 111 p.Start(); 112 } 113 catch (Exception ex) 114 { 115 Console.WriteLine("Exception Occurred :{0},{1}", ex.Message, ex.StackTrace); 116 } 117 } 118 119 /// <summary> 120 /// 创建建筑对象 121 /// </summary> 122 /// <param name="model"></param> 123 /// <param name="name">建筑名称</param> 124 /// <returns></returns> 125 private static IfcBuilding CreateBuilding(IfcStore model, string name) 126 { 127 using (var txn = model.BeginTransaction("Create Building 创建建筑对象")) 128 { 129 var building = model.Instances.New<IfcBuilding>(); 130 building.Name = name; 131 building.CompositionType = IfcElementCompositionEnum.ELEMENT; // 组成类型 132 133 var localPlacement = model.Instances.New<IfcLocalPlacement>(); 134 building.ObjectPlacement = localPlacement; 135 136 var placement = model.Instances.New<IfcAxis2Placement3D>(); 137 localPlacement.RelativePlacement = placement; 138 placement.Location = model.Instances.New<IfcCartesianPoint>(p => p.SetXYZ(0, 0, 0)); 139 140 // 获取第一个或者默认的项目 141 var project = model.Instances.OfType<IfcProject>().FirstOrDefault(); 142 if(project != null) 143 { 144 project.AddBuilding(building); 145 } 146 147 txn.Commit(); 148 149 return building; 150 } 151 } 152 153 /// <summary> 154 /// 设置任何模型必须提供的基本参数、单位、所有权等 155 /// </summary> 156 /// <param name="projectName">项目名称</param> 157 /// <returns></returns> 158 private static IfcStore CreateandInitModel(string projectName) 159 { 160 // 首先，我们需要为新模型中的数据所有权设置一些凭证 161 var credentials = new XbimEditorCredentials 162 { 163 ApplicationDevelopersName = "xBimTeam", 164 ApplicationFullName = "Hello Wall Application", 165 ApplicationIdentifier = "HelloWall.exe", 166 ApplicationVersion = "1.0", 167 EditorsFamilyName = "Team", 168 EditorsGivenName = "xBIM", 169 EditorsOrganisationName = "xBimTeam" 170 }; 171 172 // 现在我们可以创建一个ifcstore，它是ifc4格式的，将保存在内存中而不是数据库中。 173 // 如果模型的容量大于50MB，或者需要健壮的事务，那么数据库在性能方面通常更好。 174 175 var model = IfcStore.Create(credentials, XbimSchemaVersion.Ifc4, XbimStoreType.InMemoryModel); 176 177 // 开始事务，因为对模型的所有更改都是ACID 178 using (var txn = model.BeginTransaction("Initialise Model 初始化模型")) 179 { 180 var project = model.Instances.New<IfcProject>(); // 创建一个项目 181 project.Initialize(ProjectUnits.SIUnitsUK); // 将单位设置为si（mm和米） 182 project.Name = projectName; 183 184 txn.Commit(); // 现在提交更改，否则它们将在using语句的范围结束时回滚。 185 } 186 187 return model; 188 } 189 190 /// <summary> 191 /// 创建一个墙和它的几何图形，许多几何图形表示是可能的，并选择挤压矩形示意图，因为这通常用于标准情况下的墙。 192 /// </summary> 193 /// <param name="model"></param> 194 /// <param name="length">矩形足迹的长度</param> 195 /// <param name="width">矩形足迹的宽度（墙的宽度）</param> 196 /// <param name="height">挤出墙的高度，挤出是垂直的</param> 197 /// <returns></returns> 198 static private IfcWallStandardCase CreateWall(IfcStore model, double length, double width, double height) 199 { 200 using (var txn = model.BeginTransaction("Create Wall 创建墙")) 201 { 202 var wall = model.Instances.New<IfcWallStandardCase>(); //IfcWallStandardCase：IFC墙标准案例 203 wall.Name = "A Standard rectangular wall 标准矩形墙"; 204 205 // 将墙表示为矩形轮廓，墙的矩形剖面 206 var rectProf = model.Instances.New<IfcRectangleProfileDef>(); //IfcRectangleProfileDef：IFC矩形轮廓定义 207 rectProf.ProfileType = IfcProfileTypeEnum.AREA; 208 rectProf.XDim = width; 209 rectProf.YDim = length; 210 211 var insertPoint = model.Instances.New<IfcCartesianPoint>(); //IfcCartesianPoint：IFc 笛卡尔点 212 insertPoint.SetXY(0, 400); //在任意位置插入 213 rectProf.Position = model.Instances.New<IfcAxis2Placement2D>(); 214 rectProf.Position.Location = insertPoint; 215 216 // 模型区域实心 217 var body = model.Instances.New<IfcExtrudedAreaSolid>(); //IfcExtrudedAreaSolid：IFC拉伸区域实体 218 body.Depth = height; 219 body.SweptArea = rectProf; 220 body.ExtrudedDirection = model.Instances.New<IfcDirection>();//IfcDirection：IFC方向 221 body.ExtrudedDirection.SetXYZ(0, 0, 1); 222 223 // 在模型中插入几何参数 224 var origin = model.Instances.New<IfcCartesianPoint>(); //IfcCartesianPoint：IFc 笛卡尔点 225 origin.SetXYZ(0, 0, 0); 226 body.Position = model.Instances.New<IfcAxis2Placement3D>(); 227 body.Position.Location = origin; 228 229 // 创建定义形状以保存几何图形 230 var shape = model.Instances.New<IfcShapeRepresentation>();//IfcShapeRepresentation：IFC形状表示 231 var modelContext = model.Instances.OfType<IfcGeometricRepresentationContext>().FirstOrDefault(); //IfcGeometricRepresentationContext：IFC几何表示上下文 232 shape.ContextOfItems = modelContext; 233 shape.RepresentationType = "SweptSolid"; 234 shape.RepresentationIdentifier = "Body"; 235 shape.Items.Add(body); 236 237 // 创建产品定义并将模型几何图形添加到墙中 238 var rep = model.Instances.New<IfcProductDefinitionShape>(); //IfcProductDefinitionShape：IFC产品定义形状 239 rep.Representations.Add(shape); 240 wall.Representation = rep; 241 242 // 现在将墙放置到模型中 243 var lp = model.Instances.New<IfcLocalPlacement>(); 244 var ax3D = model.Instances.New<IfcAxis2Placement3D>(); 245 ax3D.Location = origin; 246 ax3D.RefDirection = model.Instances.New<IfcDirection>(); 247 ax3D.RefDirection.SetXYZ(0, 1, 0); 248 ax3D.Axis = model.Instances.New<IfcDirection>(); 249 ax3D.Axis.SetXYZ(0, 0, 1); 250 lp.RelativePlacement = ax3D; 251 wall.ObjectPlacement = lp; 252 253 // Where Clause: ifcwallstandardard 依赖于 ifcmmateriallayersetusage 的规定。 254 var ifcMaterialLayerSetUsage = model.Instances.New<IfcMaterialLayerSetUsage>(); 255 var ifcMaterialLayerSet = model.Instances.New<IfcMaterialLayerSet>(); 256 var ifcMaterialLayer = model.Instances.New<IfcMaterialLayer>(); 257 ifcMaterialLayer.LayerThickness = 10; 258 ifcMaterialLayerSet.MaterialLayers.Add(ifcMaterialLayer); 259 ifcMaterialLayerSetUsage.ForLayerSet = ifcMaterialLayerSet; 260 ifcMaterialLayerSetUsage.LayerSetDirection = IfcLayerSetDirectionEnum.AXIS2; 261 ifcMaterialLayerSetUsage.DirectionSense = IfcDirectionSenseEnum.NEGATIVE; 262 ifcMaterialLayerSetUsage.OffsetFromReferenceLine = 150; 263 264 // 将材料添加到墙商 265 var material = model.Instances.New<IfcMaterial>(); 266 material.Name = "some material"; 267 var ifcRelAssociatesMaterial = model.Instances.New<IfcRelAssociatesMaterial>(); 268 ifcRelAssociatesMaterial.RelatingMaterial = material; 269 ifcRelAssociatesMaterial.RelatedObjects.Add(wall); 270 271 ifcRelAssociatesMaterial.RelatingMaterial = ifcMaterialLayerSetUsage; 272 273 // ifcPresentationLayerAssignment 对于 ifcwall 或 ifcwallstandardcase 中的 CAD 演示是必须的 274 var ifcPresentationLayerAssignment = model.Instances.New<IfcPresentationLayerAssignment>(); 275 ifcPresentationLayerAssignment.Name = "some ifcPresentationLayerAssignment"; 276 ifcPresentationLayerAssignment.AssignedItems.Add(shape); 277 278 279 // 如果 IfcPolyline 具有两个点，则对于 IfcWall 是必需的 280 var ifcPolyline = model.Instances.New<IfcPolyline>(); 281 var startPoint = model.Instances.New<IfcCartesianPoint>(); 282 startPoint.SetXY(0, 0); 283 var endPoint = model.Instances.New<IfcCartesianPoint>(); 284 endPoint.SetXY(4000, 0); 285 ifcPolyline.Points.Add(startPoint); 286 ifcPolyline.Points.Add(endPoint); 287 288 var shape2D = model.Instances.New<IfcShapeRepresentation>(); 289 shape2D.ContextOfItems = modelContext; 290 shape2D.RepresentationIdentifier = "Axis"; 291 shape2D.RepresentationType = "Curve2D"; 292 shape2D.Items.Add(ifcPolyline); 293 rep.Representations.Add(shape2D); 294 txn.Commit(); 295 296 return wall; 297 } 298 } 299 300 /// <summary> 301 /// 向墙添加一些属性, 302 /// </summary> 303 /// <param name="model">XbimModel</param> 304 /// <param name="wall"></param> 305 static private void AddPropertiesToWall(IfcStore model, IfcWallStandardCase wall) 306 { 307 using (var txn = model.BeginTransaction("Create Wall")) 308 { 309 CreateElementQuantity(model, wall); 310 CreateSimpleProperty(model, wall); 311 txn.Commit(); 312 } 313 } 314 315 private static void CreateSimpleProperty(IfcStore model, IfcWallStandardCase wall) 316 { 317 var ifcPropertySingleValue = model.Instances.New<IfcPropertySingleValue>(psv => 318 { 319 psv.Name = "IfcPropertySingleValue:Time"; 320 psv.Description = ""; 321 psv.NominalValue = new IfcTimeMeasure(150.0); 322 psv.Unit = model.Instances.New<IfcSIUnit>(siu => 323 { 324 siu.UnitType = IfcUnitEnum.TIMEUNIT; 325 siu.Name = IfcSIUnitName.SECOND; 326 }); 327 }); 328 var ifcPropertyEnumeratedValue = model.Instances.New<IfcPropertyEnumeratedValue>(pev => 329 { 330 pev.Name = "IfcPropertyEnumeratedValue:Music"; 331 pev.EnumerationReference = model.Instances.New<IfcPropertyEnumeration>(pe => 332 { 333 pe.Name = "Notes"; 334 pe.EnumerationValues.Add(new IfcLabel("Do")); 335 pe.EnumerationValues.Add(new IfcLabel("Re")); 336 pe.EnumerationValues.Add(new IfcLabel("Mi")); 337 pe.EnumerationValues.Add(new IfcLabel("Fa")); 338 pe.EnumerationValues.Add(new IfcLabel("So")); 339 pe.EnumerationValues.Add(new IfcLabel("La")); 340 pe.EnumerationValues.Add(new IfcLabel("Ti")); 341 }); 342 pev.EnumerationValues.Add(new IfcLabel("Do")); 343 pev.EnumerationValues.Add(new IfcLabel("Re")); 344 pev.EnumerationValues.Add(new IfcLabel("Mi")); 345 346 }); 347 var ifcPropertyBoundedValue = model.Instances.New<IfcPropertyBoundedValue>(pbv => 348 { 349 pbv.Name = "IfcPropertyBoundedValue:Mass"; 350 pbv.Description = ""; 351 pbv.UpperBoundValue = new IfcMassMeasure(5000.0); 352 pbv.LowerBoundValue = new IfcMassMeasure(1000.0); 353 pbv.Unit = model.Instances.New<IfcSIUnit>(siu => 354 { 355 siu.UnitType = IfcUnitEnum.MASSUNIT; 356 siu.Name = IfcSIUnitName.GRAM; 357 siu.Prefix = IfcSIPrefix.KILO; 358 }); 359 }); 360 361 var definingValues = new List<IfcReal> { new IfcReal(100.0), new IfcReal(200.0), new IfcReal(400.0),
new IfcReal(800.0), new IfcReal(1600.0), new IfcReal(3200.0), }; 362 var definedValues = new List<IfcReal> { new IfcReal(20.0), new IfcReal(42.0), new IfcReal(46.0),
new IfcReal(56.0), new IfcReal(60.0), new IfcReal(65.0), }; 363 var ifcPropertyTableValue = model.Instances.New<IfcPropertyTableValue>(ptv => 364 { 365 ptv.Name = "IfcPropertyTableValue:Sound"; 366 foreach (var item in definingValues) 367 { 368 ptv.DefiningValues.Add(item); 369 } 370 foreach (var item in definedValues) 371 { 372 ptv.DefinedValues.Add(item); 373 } 374 ptv.DefinedUnit = model.Instances.New<IfcContextDependentUnit>(cd => 375 { 376 cd.Dimensions = model.Instances.New<IfcDimensionalExponents>(de => 377 { 378 de.LengthExponent = 0; 379 de.MassExponent = 0; 380 de.TimeExponent = 0; 381 de.ElectricCurrentExponent = 0; 382 de.ThermodynamicTemperatureExponent = 0; 383 de.AmountOfSubstanceExponent = 0; 384 de.LuminousIntensityExponent = 0; 385 }); 386 cd.UnitType = IfcUnitEnum.FREQUENCYUNIT; 387 cd.Name = "dB"; 388 }); 389 390 391 }); 392 393 var listValues = new List<IfcLabel> { new IfcLabel("Red"),
new IfcLabel("Green"),
new IfcLabel("Blue"),
new IfcLabel("Pink"),
new IfcLabel("White"),
new IfcLabel("Black"), }; 394 var ifcPropertyListValue = model.Instances.New<IfcPropertyListValue>(plv => 395 { 396 plv.Name = "IfcPropertyListValue:Colours"; 397 foreach (var item in listValues) 398 { 399 plv.ListValues.Add(item); 400 } 401 }); 402 403 var ifcMaterial = model.Instances.New<IfcMaterial>(m => 404 { 405 m.Name = "Brick"; 406 }); 407 var ifcPrValueMaterial = model.Instances.New<IfcPropertyReferenceValue>(prv => 408 { 409 prv.Name = "IfcPropertyReferenceValue:Material"; 410 prv.PropertyReference = ifcMaterial; 411 }); 412 413 414 var ifcMaterialList = model.Instances.New<IfcMaterialList>(ml => 415 { 416 ml.Materials.Add(ifcMaterial); 417 ml.Materials.Add(model.Instances.New<IfcMaterial>(m => { m.Name = "Cavity"; })); 418 ml.Materials.Add(model.Instances.New<IfcMaterial>(m => { m.Name = "Block"; })); 419 }); 420 421 422 var ifcMaterialLayer = model.Instances.New<IfcMaterialLayer>(ml => 423 { 424 ml.Material = ifcMaterial; 425 ml.LayerThickness = 100.0; 426 }); 427 var ifcPrValueMatLayer = model.Instances.New<IfcPropertyReferenceValue>(prv => 428 { 429 prv.Name = "IfcPropertyReferenceValue:MaterialLayer"; 430 prv.PropertyReference = ifcMaterialLayer; 431 }); 432 433 var ifcDocumentReference = model.Instances.New<IfcDocumentReference>(dr => 434 { 435 dr.Name = "Document"; 436 dr.Location = "c://Documents//TheDoc.Txt"; 437 }); 438 var ifcPrValueRef = model.Instances.New<IfcPropertyReferenceValue>(prv => 439 { 440 prv.Name = "IfcPropertyReferenceValue:Document"; 441 prv.PropertyReference = ifcDocumentReference; 442 }); 443 444 var ifcTimeSeries = model.Instances.New<IfcRegularTimeSeries>(ts => 445 { 446 ts.Name = "Regular Time Series"; 447 ts.Description = "Time series of events"; 448 ts.StartTime = new IfcDateTime("2015-02-14T12:01:01"); 449 ts.EndTime = new IfcDateTime("2015-05-15T12:01:01"); 450 ts.TimeSeriesDataType = IfcTimeSeriesDataTypeEnum.CONTINUOUS; 451 ts.DataOrigin = IfcDataOriginEnum.MEASURED; 452 ts.TimeStep = 604800; //7 days in secs 453 }); 454 455 var ifcPrValueTimeSeries = model.Instances.New<IfcPropertyReferenceValue>(prv => 456 { 457 prv.Name = "IfcPropertyReferenceValue:TimeSeries"; 458 prv.PropertyReference = ifcTimeSeries; 459 }); 460 461 var ifcAddress = model.Instances.New<IfcPostalAddress>(a => 462 { 463 a.InternalLocation = "Room 101"; 464 a.AddressLines.AddRange(new[] { new IfcLabel("12 New road"), new IfcLabel("DoxField") }); 465 a.Town = "Sunderland"; 466 a.PostalCode = "DL01 6SX"; 467 }); 468 var ifcPrValueAddress = model.Instances.New<IfcPropertyReferenceValue>(prv => 469 { 470 prv.Name = "IfcPropertyReferenceValue:Address"; 471 prv.PropertyReference = ifcAddress; 472 }); 473 var ifcTelecomAddress = model.Instances.New<IfcTelecomAddress>(a => 474 { 475 a.TelephoneNumbers.Add(new IfcLabel("01325 6589965")); 476 a.ElectronicMailAddresses.Add(new IfcLabel("bob@bobsworks.com")); 477 }); 478 var ifcPrValueTelecom = model.Instances.New<IfcPropertyReferenceValue>(prv => 479 { 480 prv.Name = "IfcPropertyReferenceValue:Telecom"; 481 prv.PropertyReference = ifcTelecomAddress; 482 }); 483 484 // ifcelementQuantity 创建模型元素数量 485 var ifcPropertySet = model.Instances.New<IfcPropertySet>(ps => 486 { 487 ps.Name = "Test:IfcPropertySet"; 488 ps.Description = "Property Set"; 489 ps.HasProperties.Add(ifcPropertySingleValue); 490 ps.HasProperties.Add(ifcPropertyEnumeratedValue); 491 ps.HasProperties.Add(ifcPropertyBoundedValue); 492 ps.HasProperties.Add(ifcPropertyTableValue); 493 ps.HasProperties.Add(ifcPropertyListValue); 494 ps.HasProperties.Add(ifcPrValueMaterial); 495 ps.HasProperties.Add(ifcPrValueMatLayer); 496 ps.HasProperties.Add(ifcPrValueRef); 497 ps.HasProperties.Add(ifcPrValueTimeSeries); 498 ps.HasProperties.Add(ifcPrValueAddress); 499 ps.HasProperties.Add(ifcPrValueTelecom); 500 }); 501 502 // 需要建立关系 503 model.Instances.New<IfcRelDefinesByProperties>(rdbp => 504 { 505 rdbp.Name = "Property Association"; 506 rdbp.Description = "IfcPropertySet associated to wall"; 507 rdbp.RelatedObjects.Add(wall); 508 rdbp.RelatingPropertyDefinition = ifcPropertySet; 509 }); 510 } 511 512 private static void CreateElementQuantity(IfcStore model, IfcWallStandardCase wall) 513 { 514 // 创建模型元素数量 515 // 首先我们需模型简单物理量，首先将使用模型量长度 516 var ifcQuantityArea = model.Instances.New<IfcQuantityLength>(qa => 517 { 518 qa.Name = "IfcQuantityArea:Area"; 519 qa.Description = ""; 520 qa.Unit = model.Instances.New<IfcSIUnit>(siu => 521 { 522 siu.UnitType = IfcUnitEnum.LENGTHUNIT; 523 siu.Prefix = IfcSIPrefix.MILLI; 524 siu.Name = IfcSIUnitName.METRE; 525 }); 526 qa.LengthValue = 100.0; 527 528 }); 529 530 // 然后，上下文相关单元的数量计数 531 var ifcContextDependentUnit = model.Instances.New<IfcContextDependentUnit>(cd => 532 { 533 cd.Dimensions = model.Instances.New<IfcDimensionalExponents>(de => 534 { 535 de.LengthExponent = 1; 536 de.MassExponent = 0; 537 de.TimeExponent = 0; 538 de.ElectricCurrentExponent = 0; 539 de.ThermodynamicTemperatureExponent = 0; 540 de.AmountOfSubstanceExponent = 0; 541 de.LuminousIntensityExponent = 0; 542 }); 543 cd.UnitType = IfcUnitEnum.LENGTHUNIT; 544 cd.Name = "Elephants"; 545 }); 546 var ifcQuantityCount = model.Instances.New<IfcQuantityCount>(qc => 547 { 548 qc.Name = "IfcQuantityCount:Elephant"; 549 qc.CountValue = 12; 550 qc.Unit = ifcContextDependentUnit; 551 }); 552 553 554 // 使用转换单位 555 var ifcConversionBasedUnit = model.Instances.New<IfcConversionBasedUnit>(cbu => 556 { 557 cbu.ConversionFactor = model.Instances.New<IfcMeasureWithUnit>(mu => 558 { 559 mu.ValueComponent = new IfcRatioMeasure(25.4); 560 mu.UnitComponent = model.Instances.New<IfcSIUnit>(siu => 561 { 562 siu.UnitType = IfcUnitEnum.LENGTHUNIT; 563 siu.Prefix = IfcSIPrefix.MILLI; 564 siu.Name = IfcSIUnitName.METRE; 565 }); 566 567 }); 568 cbu.Dimensions = model.Instances.New<IfcDimensionalExponents>(de => 569 { 570 de.LengthExponent = 1; 571 de.MassExponent = 0; 572 de.TimeExponent = 0; 573 de.ElectricCurrentExponent = 0; 574 de.ThermodynamicTemperatureExponent = 0; 575 de.AmountOfSubstanceExponent = 0; 576 de.LuminousIntensityExponent = 0; 577 }); 578 cbu.UnitType = IfcUnitEnum.LENGTHUNIT; 579 cbu.Name = "Inch"; 580 }); 581 var ifcQuantityLength = model.Instances.New<IfcQuantityLength>(qa => 582 { 583 qa.Name = "IfcQuantityLength:Length"; 584 qa.Description = ""; 585 qa.Unit = ifcConversionBasedUnit; 586 qa.LengthValue = 24.0; 587 }); 588 589 // 创建 IfcElementQuantity 590 var ifcElementQuantity = model.Instances.New<IfcElementQuantity>(eq => 591 { 592 eq.Name = "Test:IfcElementQuantity"; 593 eq.Description = "Measurement quantity"; 594 eq.Quantities.Add(ifcQuantityArea); 595 eq.Quantities.Add(ifcQuantityCount); 596 eq.Quantities.Add(ifcQuantityLength); 597 }); 598 599 // 创建关系 600 model.Instances.New<IfcRelDefinesByProperties>(rdbp => 601 { 602 rdbp.Name = "Area Association"; 603 rdbp.Description = "IfcElementQuantity associated to wall"; 604 rdbp.RelatedObjects.Add(wall); 605 rdbp.RelatingPropertyDefinition = ifcElementQuantity; 606 }); 607 } 608 } 609 }
生成的IFC文件可以在您选择的查看器中打开：
ISO-10303-21; HEADER; FILE_DESCRIPTION ((''), '2;1'); FILE_NAME ('', '2016-10-31T10:18:08', (''), (''), 'Xbim File Processor version 4.0.0.0', 'Xbim version 4.0.0.0', ''); FILE_SCHEMA (('IFC4')); ENDSEC; DATA; #1=IFCPROJECT('2MSHGQD897wuyjYHKVxtyf',#2,'HelloWall',$,$,$,$,(#20,#23),#8); #2=IFCOWNERHISTORY(#5,#6,$,.ADDED.,$,$,$,0); #3=IFCPERSON($,'Team','xBIM',$,$,$,$,$); #4=IFCORGANIZATION($,'xBimTeam',$,$,$); #5=IFCPERSONANDORGANIZATION(#3,#4,$); #7=IFCORGANIZATION($,'xBimTeam',$,$,$); #6=IFCAPPLICATION(#7,'1.0','Hello Wall Application','HelloWall.exe'); #8=IFCUNITASSIGNMENT((#9,#10,#11,#12,#13,#14,#15,#16,#17)); #9=IFCSIUNIT(*,.LENGTHUNIT.,.MILLI.,.METRE.); #10=IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.); #11=IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.); #12=IFCSIUNIT(*,.SOLIDANGLEUNIT.,$,.STERADIAN.); #13=IFCSIUNIT(*,.PLANEANGLEUNIT.,$,.RADIAN.); #14=IFCSIUNIT(*,.MASSUNIT.,$,.GRAM.); #15=IFCSIUNIT(*,.TIMEUNIT.,$,.SECOND.); #16=IFCSIUNIT(*,.THERMODYNAMICTEMPERATUREUNIT.,$,.DEGREE_CELSIUS.); #17=IFCSIUNIT(*,.LUMINOUSINTENSITYUNIT.,$,.LUMEN.); #18=IFCCARTESIANPOINT((0.,0.,0.)); #19=IFCAXIS2PLACEMENT3D(#18,$,$); #20=IFCGEOMETRICREPRESENTATIONCONTEXT('Building Model','Model',3,1.E-05,#19,$); #21=IFCCARTESIANPOINT((0.,0.)); #22=IFCAXIS2PLACEMENT2D(#21,$); #23=IFCGEOMETRICREPRESENTATIONCONTEXT('Building Plan View','Plan',2,1.E-05,#22,$); #24=IFCBUILDING('0jQ$yvAIv6URCwLuvWnAo0',#2,'Default Building',$,$,#25,$,$,.ELEMENT.,$,$,$); #25=IFCLOCALPLACEMENT($,#26); #26=IFCAXIS2PLACEMENT3D(#27,$,$); #27=IFCCARTESIANPOINT((0.,0.,0.)); #28=IFCRELAGGREGATES('3Qs6TKkPjASQ1ctGzUSQ7F',#2,$,$,#1,(#24)); #29=IFCWALLSTANDARDCASE('3NBPkknun6EuV9fpeE6rFh',#2,'A Standard rectangular wall',$,$,#39,#38,$,$); #30=IFCRECTANGLEPROFILEDEF(.AREA.,$,#32,300.,4000.); #31=IFCCARTESIANPOINT((0.,400.)); #32=IFCAXIS2PLACEMENT2D(#31,$); #33=IFCEXTRUDEDAREASOLID(#30,#36,#34,2400.); #34=IFCDIRECTION((0.,0.,1.)); #35=IFCCARTESIANPOINT((0.,0.,0.)); #36=IFCAXIS2PLACEMENT3D(#35,$,$); #37=IFCSHAPEREPRESENTATION(#20,'Body','SweptSolid',(#33)); 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