IfcCsgPrimitive3D

Definition from IAI: Abstract supertype of all three dimensional primitives used as either tree root item, or as Boolean results within an CSG solid model. All 3D CSG primitives are defined within an three-dimensional placement coordinate system,.

NOTE No directly orresponding STEP entity, the select type primitive_3d covers the same individual 3D CSG primitives, the position attribute has been added to apply equally to all subtypes. Please refer to ISO/IS 10303-42:1994, p. 234 for the final definition of the formal standard.

HISTORY New entity in IFC2x Edition 3.

EXPRESS specification:

ENTITY IfcCsgPrimitive3D

ABSTRACT SUPERTYPE OF

(ONEOF(IfcBlock, IfcRectangularPyramid, IfcRightCircularCylinder, IfcRightCircularCone, IfcSphere))

SUBTYPE OF (

IfcGeometricRepresentationItem);

Position

IfcAxis2Placement3D;

DERIVE

Dim

IfcDimensionCount := 3;

END_ENTITY;

Attribute definitions:

Position	:	The placement coordinate system to which the parameters of each individual CSG primitive apply.
Dim	:	The space dimensionality of this geometric representation item, it is always 3.

Inheritance graph

ENTITY IfcCsgPrimitive3D;

ENTITY IfcRepresentationItem;

INVERSE

LayerAssignments

SET OF IfcPresentationLayerAssignment FOR AssignedItems;

StyledByItem

SET [0:1] OF IfcStyledItem FOR Item;