8.8.3.25 IfcIndexedPolygonalFaceWithVoids

RV ⓘ

AbV ⓘ

8.8.3.25.1 Semantic definition

The IfcIndexedPolygonalFaceWithVoids is a compact representation of a planar face with inner loops, being part of a face set.

8.8.3.25.2 Entity inheritance

8.8.3.25.3 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.
IfcIndexedPolygonalFace (3)
1	CoordIndex	LIST [3:?] OF IfcPositiveInteger	One-dimensional list with the indices for the three or more points, that define the vertices of the outer loop. If the tessellated face set is closed, indicated by SELF\IfcTessellatedFaceSet.Closed, then the points, defining the outer loop, shall connect counter clockwise, as seen from the outside of the body, so that the resulting normal will point outwards. NOTE The coordinates of the vertices are provided by the indexed list of SELF\IfcTessellatedFaceSet.Coordinates.CoordList. If the SELF\IfcTessellatedFaceSet.PnIndex is provided, the indices point into it, otherwise directly into the IfcCartesianPointList3D.
	ToFaceSet	SET [1:?] OF IfcPolygonalFaceSet FOR Faces	Reference to the IfcPolygonalFaceSet for which this face is associated.
	HasTexCoords	SET [0:1] OF IfcTextureCoordinateIndices FOR TexCoordsOf	Optional reference to the IfcTextureCoordinateIndices that provide the texture coordinates for applying textures to this face.
Click to show 5 hidden inherited attributes
IfcIndexedPolygonalFaceWithVoids (1)
2	InnerCoordIndices	LIST [1:?] OF LIST [3:?] OF UNIQUE IfcPositiveInteger	Two-dimensional list, where the first dimension represents each inner loop (from 1 to N) and the second dimension the indices to three or more points that define the vertices of each inner loop. If the tessellated face set is closed, indicated by SELF\IfcTessellatedFaceSet.Closed, then the points, defining the inner loops, shall connect clockwise, as seen from the outside of the body. NOTE The coordinates of the vertices are provided by the indexed list of SELF\IfcTessellatedFaceSet.Coordinates.CoordList. If the SELF\IfcTessellatedFaceSet.PnIndex is provided, the indices point into it, otherwise directly into the IfcCartesianPointList3D.

Table 8.8.3.25.B

8.8.3.25.4 Examples

Figure 8.8.3.25.A

Polygonal Face Tessellation

8.8.3.25.5 Formal representation

 ENTITY IfcIndexedPolygonalFaceWithVoids
 SUBTYPE OF (IfcIndexedPolygonalFace);
	InnerCoordIndices : LIST [1:?] OF LIST [3:?] OF UNIQUE IfcPositiveInteger;
END_ENTITY;

8.8.3.25.6 References

IfcIndexedPolygonalFace

8.8.3.25 IfcIndexedPolygonalFaceWithVoids

8.8.3.25.1 Semantic definition

8.8.3.25.2 Entity inheritance

8.8.3.25.3 Attributes

8.8.3.25.4 Examples

8.8.3.25.5 Formal representation

8.8.3.25.6 References

8.8.3.25.7 Changelog

8.8.3.25.7.1 IFC4

8.8.3.25.7.2 IFC4.2

8.8.3.25.7.3 IFC4.3_DEV_738df036

	ENTITY IfcIndexedPolygonalFaceWithVoids
	SUBTYPE OF (IfcIndexedPolygonalFace);
	InnerCoordIndices : LIST [1:?] OF LIST [3:?] OF UNIQUE IfcPositiveInteger;
	END_ENTITY;