IfcConic

Semantic definitions at the entity

Entity definition

An IfcConic is a parameterized planar curve.

NOTE Definition according to ISO/CD 10303-42:1992
A conic is a planar curve which could be produced by intersecting a plane with a cone. A conic is defined in terms of its intrinsic geometric properties rather than being described in terms of other geometry. A conic entity always has a placement coordinate system defined by axis2_placement; the parametric representation is defined in terms of this placement coordinate system.

NOTE Entity adapted from conic defined in ISO 10303-42

HISTORY New entity in IFC1.0

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	Position	IfcAxis2Placement	[1:1]	The location and orientation of the conic. Further details of the interpretation of this attribute are given for the individual subtypes."	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
IfcCurve
	Dim :=IfcCurveDim(SELF)	IfcDimensionCount	[1:1]	The space dimensionality of this abstract class, defined differently for all subtypes, i.e. for IfcLine, IfcConic and IfcBoundedCurve.	X
IfcConic
1	Position	IfcAxis2Placement	[1:1]	The location and orientation of the conic. Further details of the interpretation of this attribute are given for the individual subtypes."	X

Formal representations

XSD Specification

 <xs:element name="IfcConic" type="ifc:IfcConic" abstract="true" substitutionGroup="ifc:IfcCurve" nillable="true"/>

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

  <xs:complexContent>

   <xs:extension base="ifc:IfcCurve">

    <xs:sequence>

     <xs:element name="Position">

      <xs:complexType>

       <xs:group ref="ifc:IfcAxis2Placement"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcConic

 ABSTRACT SUPERTYPE OF(ONEOF(IfcCircle, IfcEllipse))

 SUBTYPE OF (IfcCurve);

  Position : IfcAxis2Placement;

END_ENTITY;

 EXPRESS-G diagram

	Konische Form
	Conic
	Conique