IfcBoundingBox

Natural language names
Umfassungskörper
Bounding Box
Boite englobante
Semantic definitions at the entity
Entity definition

The IfcBoundingBox defines an orthogonal box oriented parallel to the axes of the object coordinate system in which it is defined. It is defined by a Corner being a three-dimensional Cartesian point and three length measures defining the X, Y and Z parameters of the box in the direction of the positive axes.

NOTE  Any subtype of IfcProduct having a product shape representation may have a bounding box representation. The 'Box' representation identifier defined at IfcShapeRepresentation utilizes the IfcBoundingBox as the simpliest 3D shape representation.
half space solid

As shown in Figure 329, the IfcBoundingBox is defined with its own location which can be used to place the IfcBoundingBox relative to the geometric coordinate system. The IfcBoundingBox is defined by the lower left corner (Corner) and the upper right corner (XDim, YDim, ZDim measured within the parent co-ordinate system).

Figure 329 — Bounding box

 
NOTE  Corresponding STEP type box_domain defined in ISO 10303-42.
HISTORY  New entity in IFC1.0.
Attribute definitions
#AttributeTypeCardinalityDescription G
1CornerIfcCartesianPoint Location of the bottom left corner (having the minimum values).X
2XDimIfcPositiveLengthMeasure Length attribute (measured along the edge parallel to the X Axis)X
3YDimIfcPositiveLengthMeasure Width attribute (measured along the edge parallel to the Y Axis)X
4ZDimIfcPositiveLengthMeasure Height attribute (measured along the edge parallel to the Z Axis).X
Dim
:=3
IfcDimensionCountThe space dimensionality of this class, it is always 3. X
Inherited definitions from supertypes
Entity inheritance IfcGeometricRepresentationItem IfcRepresentationItem
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRepresentationItem
LayerAssignmentIfcPresentationLayerAssignment
@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.
IFC2x3 CHANGE  The inverse attribute LayerAssignments has been added.
IFC4 CHANGE  The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
X
StyledByItemIfcStyledItem
@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.
IFC2x3 CHANGE  The inverse attribute StyledByItem has been added.
X
IfcGeometricRepresentationItem
IfcBoundingBox
1CornerIfcCartesianPoint Location of the bottom left corner (having the minimum values).X
2XDimIfcPositiveLengthMeasure Length attribute (measured along the edge parallel to the X Axis)X
3YDimIfcPositiveLengthMeasure Width attribute (measured along the edge parallel to the Y Axis)X
4ZDimIfcPositiveLengthMeasure Height attribute (measured along the edge parallel to the Z Axis).X
Dim
:=3
IfcDimensionCountThe space dimensionality of this class, it is always 3. X
Formal representations
XML Specification
 <xs:element name="IfcBoundingBox" type="ifc:IfcBoundingBox" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
 <xs:complexType name="IfcBoundingBox">
  <xs:complexContent>
   <xs:extension base="ifc:IfcGeometricRepresentationItem">
    <xs:sequence>
     <xs:element name="Corner" type="ifc:IfcCartesianPoint" nillable="true"/>
    </xs:sequence>
    <xs:attribute name="XDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="YDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="ZDim" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcBoundingBox
 SUBTYPE OF (IfcGeometricRepresentationItem);
  Corner : IfcCartesianPoint;
  XDim : IfcPositiveLengthMeasure;
  YDim : IfcPositiveLengthMeasure;
  ZDim : IfcPositiveLengthMeasure;
 DERIVE
  Dim : IfcDimensionCount := 3;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcBoxedHalfSpace

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