IfcCsgPrimitive3D

Semantic definitions at the entity

Entity definition

IfcCsgPrimitive3D is an abstract supertype of all three dimensional primitives used as either tree root item, or as Boolean results within a CSG solid model. All 3D CSG primitives are defined within a three-dimensional placement coordinate system.

HISTORY New entity in IFC2x3.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	Position	IfcAxis2Placement3D	[1:1]	The placement coordinate system to which the parameters of each individual CSG primitive apply.	X
	Dim :=3	IfcDimensionCount	[1:1]	The space dimensionality of this geometric representation item, it is always 3.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	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
IfcCsgPrimitive3D
1	Position	IfcAxis2Placement3D	[1:1]	The placement coordinate system to which the parameters of each individual CSG primitive apply.	X
	Dim :=3	IfcDimensionCount	[1:1]	The space dimensionality of this geometric representation item, it is always 3.	X

Formal representations

XSD Specification

 <xs:element name="IfcCsgPrimitive3D" type="ifc:IfcCsgPrimitive3D" abstract="true" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>

 <xs:complexType name="IfcCsgPrimitive3D" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcGeometricRepresentationItem">

    <xs:sequence>

     <xs:element name="Position" type="ifc:IfcAxis2Placement3D" nillable="true"/>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcCsgPrimitive3D

 ABSTRACT SUPERTYPE OF(ONEOF(IfcBlock, IfcRectangularPyramid, IfcRightCircularCone, IfcRightCircularCylinder, IfcSphere))

 SUBTYPE OF (IfcGeometricRepresentationItem);

  Position : IfcAxis2Placement3D;

 DERIVE

  Dim : IfcDimensionCount := 3;

END_ENTITY;

 EXPRESS-G diagram

	CSG - Primitiv (3D)
	Csg Primitive3 D
	Primitive 3D Csg