ENTITY IfcTriangulatedFaceSet

(* SCHEMA IFC4; *)

-- ==============================
-- LEGACY ADD ATTRIBUTE: IfcTriangulatedFaceSet.NormalIndex
-- 
-- IfcTriangulatedFaceSet was introduced in IFC4 but in addendum one,
-- the NormalIndex attribute was replaced with PhIndex, which has a
-- completely different structure and meaning.  Add back NormalIndex
-- so the entity has both.  On read, the IFCBIM library will populate
-- the correct one based on the structure of the data.  On write, only
-- PhIndex will be written.

ENTITY IfcTriangulatedFaceSet
 SUPERTYPE OF (ONEOF
	(IfcTriangulatedIrregularNetwork))
 SUBTYPE OF (IfcTessellatedFaceSet);
	Normals : OPTIONAL LIST [1:?] OF LIST [3:3] OF IfcParameterValue;
	Closed : OPTIONAL IfcBoolean;
	CoordIndex : LIST [1:?] OF LIST [3:3] OF IfcPositiveInteger;

	-- IFCBIM Library Specific
	-- Current definition.  Replaced NormalIndex in IFC4 add1
	PnIndex : OPTIONAL LIST [1:?] OF IfcPositiveInteger;
	
	-- Original IFC4 attribute.  Here as an alternate for reading
	-- old data.  Will be populated if the data contains a list of
	-- list, but only PhIndex will be written.
	NormalIndex : OPTIONAL LIST [1:?] OF LIST [3:3] OF INTEGER;
	
 DERIVE
	 NumberOfTriangles : IfcInteger := SIZEOF(CoordIndex);
END_ENTITY;

Explicit Attributes

Derived Attributes

Inverse Attributes

Supertypes

Subtypes

Referenced By

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2023-12-22T16:31:10-05:00