Ifc 人工解析——拿一根梁来举例说明

最新推荐文章于 2025-05-14 09:26:50 发布

曾藩国

最新推荐文章于 2025-05-14 09:26:50 发布

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CC 4.0 BY-SA版权

分类专栏：自己研究文章标签： Ifc 解析

本文链接：https://blog.youkuaiyun.com/jerryzfc/article/details/80829217

本文详细介绍了IFC（Industry Foundation Classes）格式，特别是通过一根梁的例子，解释了IFC的类继承关系，中性文件的表达方式，以及IfcRoot、IfcObjectDefinition、IfcRelationship和IfcPropertyDefinition等核心概念。IFC是一种建筑信息模型标准，用于交换建筑和构造领域的数据。

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原始天尊

ISO-10303-21;
HEADER;
FILE_DESCRIPTION(('ViewDefinition [ReferenceView_V1]'),'2;1');
FILE_NAME(
/* name */ 'C:\\My Work\\Geometry Gym\\documents\\building smart\\github\\ifcscript\\examples\\BeamExtruded.ifc',
/* time_stamp */ '2017-06-27T13:32:38',
/* author */ ('jonm'),
/* organization */ ('Geometry Gym'),
/* preprocessor_version */ 'GeometryGymIFC v0.0.15.0 by Geometry Gym Pty Ltd built 2017-06-27T02:48:24',
/* originating_system */ 'IFCExamples v0.0.1.0',
/* authorization */ 'None');

FILE_SCHEMA (('IFC4'));
ENDSEC;

DATA;
#10= IFCCARTESIANPOINT((0.0,0.0,0.0));
#11= IFCAXIS2PLACEMENT3D(#10,$,$);
#12= IFCLOCALPLACEMENT($,#11);
/* defines the default building (as required as the minimum spatial element)  */
#13= IFCBUILDING('39t4Pu3nTC4ekXYRIHJB9W',$,'IfcBuilding',$,$,#12,$,$,$,$,$,#18);
#14= IFCRELCONTAINEDINSPATIALSTRUCTURE('3Sa3dTJGn0H8TQIGiuGQd5',$,'Building','Building Container for Elements',(#61),#13);
#15= IFCCARTESIANPOINT((0.0,0.0,0.0));
#16= IFCAXIS2PLACEMENT3D(#15,$,$);
#18= IFCPOSTALADDRESS($,$,$,$,('Unknown'),$,'Unknown',$,'Unknown','Unknown');
/* general entities required for all IFC  sets, defining the context for the exchange */
#20= IFCPROJECT('0$WU4A9R19$vKWO$AdOnKA',$,'IfcProject',$,$,$,$,(#28),#21);
#21= IFCUNITASSIGNMENT((#22,#23,#24,#25,#26));
#22= IFCSIUNIT(*,.LENGTHUNIT.,.MILLI.,.METRE.);
#23= IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.);
#24= IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.);
#25= IFCSIUNIT(*,.PLANEANGLEUNIT.,$,.RADIAN.);
#26= IFCSIUNIT(*,.TIMEUNIT.,$,.SECOND.);
#27= IFCRELAGGREGATES('091a6ewbvCMQ2Vyiqspa7a',$,'Project Container','Project Container for Buildings',#20,(#13));
#28= IFCGEOMETRICREPRESENTATIONCONTEXT($,'Model',3,0.0001,#30,#31);
#29= IFCCARTESIANPOINT((0.0,0.0,0.0));
#30= IFCAXIS2PLACEMENT3D(#29,$,$);
#31= IFCDIRECTION((0.0,1.0));
#32= IFCGEOMETRICREPRESENTATIONSUBCONTEXT('Body','Model',*,*,*,*,#28,$,.MODEL_VIEW.,$);
/* Example data for BeamExtruded */
#50= IFCCARTESIANPOINTLIST2D(((2.8,-79.5),(2.8,79.5),(6.31472,87.98528),(14.8,91.5),(50.0,91.5),(50.0,100.0),(-50.0,100.0),(-50.0,91.5),(-14.8,91.5),(-6.31472,87.98528),(-2.8,79.5),(-2.8,-79.5),(-6.31472,-87.98528),(-14.8,-91.5),(-50.0,-91.5),(-50.0,-100.0),(50.0,-100.0),(50.0,-91.5),(14.8,-91.5),(6.31472,-87.98528)));
#51= IFCINDEXEDPOLYCURVE(#50,(IFCLINEINDEX((1,2)),IFCARCINDEX((2,3,4)),IFCLINEINDEX((4,5)),IFCLINEINDEX((5,6)),IFCLINEINDEX((6,7)),IFCLINEINDEX((7,8)),IFCLINEINDEX((8,9)),IFCARCINDEX((9,10,11)),IFCLINEINDEX((11,12)),IFCARCINDEX((12,13,14)),IFCLINEINDEX((14,15)),IFCLINEINDEX((15,16)),IFCLINEINDEX((16,17)),IFCLINEINDEX((17,18)),IFCLINEINDEX((18,19)),IFCARCINDEX((19,20,1))),$);
#52= IFCARBITRARYCLOSEDPROFILEDEF(.AREA.,'IPE200',#51);
#53= IFCCARTESIANPOINT((0.0,0.0,0.0));
#54= IFCDIRECTION((0.0,1.0,0.0));
#55= IFCDIRECTION((1.0,0.0,0.0));
#56= IFCAXIS2PLACEMENT3D(#53,#54,#55);
#57= IFCDIRECTION((0.0,0.0,1.0));
#58= IFCEXTRUDEDAREASOLID(#52,#56,#57,1000.0);
#59= IFCSHAPEREPRESENTATION(#32,'Body','SweptSolid',(#58));
#60= IFCPRODUCTDEFINITIONSHAPE($,$,(#59));
#61= IFCBEAM('0EF5_z