平面长方体指定任意矩形长方体及其在二维笛卡尔坐标系中的位置。如果平面长方体在三维坐标系中使用,它将定义XY平面内的矩形框。
注:实体改编自ISO10303-46中定义的平面盒
IFC2x2中增加的新实体。
# | Attribute | Type | Cardinality | Description | C |
---|---|---|---|---|---|
IfcRepresentationItem | |||||
LayerAssignment | IfcPresentationLayerAssignment @AssignedItems |
S[0:1] | Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items. | X | |
StyledByItem | IfcStyledItem @Item |
S[0:1] | Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. | X | |
IfcGeometricRepresentationItem | |||||
IfcPlanarExtent | |||||
1 | SizeInX | IfcLengthMeasure | [1:1] | The extent in the direction of the x-axis. | X |
2 | SizeInY | IfcLengthMeasure | [1:1] | The extent in the direction of the y-axis. | X |
IfcPlanarBox | |||||
3 | Placement | IfcAxis2Placement | [1:1] | The IfcAxis2Placement positions a local coordinate system for the definition of the rectangle. The origin of this local coordinate system serves as the lower left corner of the rectangular box.
NOTE In case of a 3D placement by IfcAxisPlacement3D the IfcPlanarBox is defined within the xy plane of the definition coordinate system. |
X |
EXPRESS Specification
ENTITY IfcPlanarBox
SUBTYPE OF (IfcPlanarExtent);
Placement : IfcAxis2Placement;
END_ENTITY;