建筑信息模型存储标准GB T51447-2021_501-550.doc

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D.7几何约束资源

D.7.1几何约束资源类型的EXPRESS描述应按表D.7.1的规定采用。

表D.7.1几何约束资源类型的EXPRESS描述

类型

EXPRESS措述

边曲线

(HeCurveOr

EdgeCurve)

TYPEIieCurveOrEdgeCurve-SELECT(

IfcBoundedCurve.

feEdgeCurve);

END_TYPE

栅格坐标方向选择(KeGridPlacementDireetionSeleet)

TYPEfcGridPlacementDirectionSelect=SELECT(

IfeVirtualGridlntersection,

lfeDrecticn);

END_TYPE

点或顶点(fcPointOrVertexPoint)

TYPEIePoinsOrVerteaPoint-SEIFCT(

lfePoint,

lfcVertexPoint);

END_TYPE

实体或壳

(lfcSolidOrShell)

TYPElicSolidOrShell-SELECT(

lfeSdidModd.

lfcClosedShell);

END_TYPE

表面或面

(lheSurfaceOrFaceSurface)

TYPENeSurfaceOrFaceSurface-SEIECT(

16-Suface

lfcFaceSurface,

1fcFaceBosedSurlaceModel);

END_TYPE

D.7.2几何约束资源实体的EXPRESS描述应按表D.7.2的规定采用。

表D.7.2几何约束资源实体的EXPRESS描述

类型

EXPRESS措述

连接几何曲线

(IfeCoanretion

Carwfmetry)

ENTTTYIfkConnectionCarveGecmetp

SUBTYPEOFIfkConnecticeGecometry,

CurveOnRlatingEement:IfeCarveOrEdgeCurve;

CarwOnRlatsdFlmunt.OPTIONAI.HCarveOrEdgeCurver

END_ENTITY

连接几何

(IfeConnrction

Geemetry)

ENTITYIfeConnectionGeometry

ABSTRACTSUPERTYPEOF(ONEOF(IlConnectionCurveGeometry,IlcConnectionPointGeometry,IfeConnectionSurfaceGeometry,IfeConnectionVolumeGeometry));

END_ENTITY

连接点偏心

(HicConnection

PointEecentricity)

ENTTTYIfcConnectionPointEecentricity

SUBTYPEOFIfkCoenecticnPointGeometry;

EecentrictyinX:UPTIONAL.feLangthMeisurer

EeeentridtylnY:OPTIONAL.IfelengthMessure;

EecentricitylnZ:OPTIONAL.IfeLangthMessure;

END_ENTITY

连接点几何

(IeCoanectionPointGeometry)

ENTITYIleConnectionPointGecmetry

SUPERTYPEOF(IHcConnectionPointEccentricity)

SUBTYPEOFIkConnectioeGeometry;

PoinsOnRelatingPement:fcPoinsOrVertesPoint;

PoinrOnRlatedElemnt:OPTIONAL.IfaPtinrOrVertexPoint;

FND_FNTITY

续表D.7.2

类型

EXPRESS操述

连接表面几何(lfeConnectionSurfaoGeometry)

ENTTTYIicConnectionSurinceGeometry

SUBTYPEOFIicConnectionGcometry;

SuraceOhRelatingElement,HfcSurfaceOhFaceSurfacen

SuraeOhRelstedElement:OPTIONAl.IfeSurfaceOrFaceSurface;

END_ENTITY

连接体积几何(IfeConnectionVolumsGeometry)

ENTTTYIicCon