8.8.3.11 IfcCsgPrimitive3D

AbV ⓘ

ABSTRACT This definition may not be instantiated

8.8.3.11.1 Semantic 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.

8.8.3.11.2 Entity inheritance

8.8.3.11.3 Attributes

#	Attribute	Type	Description
IfcRepresentationItem (2)
	LayerAssignment	SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems	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.
	StyledByItem	SET [0:1] OF IfcStyledItem FOR Item	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.
Click to show 2 hidden inherited attributes
IfcCsgPrimitive3D (2)
1	Position	IfcAxis2Placement3D	The placement coordinate system to which the parameters of each individual CSG primitive apply.
*	Dim	IfcDimensionCount	This attribute is formally derived. `3` The space dimensionality of this geometric representation item, it is always 3.

Table 8.8.3.11.A

8.8.3.11.4 Formal representation

 ENTITY IfcCsgPrimitive3D
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcBlock
	,IfcRectangularPyramid
	,IfcRightCircularCone
	,IfcRightCircularCylinder
	,IfcSphere))
 SUBTYPE OF (IfcGeometricRepresentationItem);
	Position : IfcAxis2Placement3D;
 DERIVE
	 Dim : IfcDimensionCount := 3;
END_ENTITY;

	ENTITY IfcCsgPrimitive3D
	ABSTRACT SUPERTYPE OF (ONEOF
	(IfcBlock
	,IfcRectangularPyramid
	,IfcRightCircularCone
	,IfcRightCircularCylinder
	,IfcSphere))
	SUBTYPE OF (IfcGeometricRepresentationItem);
	Position : IfcAxis2Placement3D;
	DERIVE
	Dim : IfcDimensionCount := 3;
	END_ENTITY;