8.12.3.16 IfcFillAreaStyleTiles

8.12.3.16.1 Semantic definition

The IfcFillAreaStyleTiles defines the filling of an IfcAnnotationFillArea by recurring patterns of styled two dimensional geometry, called a tile. The recurrence pattern is determined by two vectors, that multiply the tile in regular form.

The two vectors act as a two dimensional repeat factor that determines eight new positions for the tiles.

I + k~1~* R~1~ + k~2~* R~2~ k~1~,k~2~= -1,0,1 ,
Figure 8.12.3.16.A

Figure 8.12.3.16.B shows the use of a vector for hatch line distances

IfcFillAreaStyleTiles_Fig1.gif 12,9 KB — Figure 8.12.3.16.B — two vectors as two direction repeat factor

8.12.3.16.2 Entity inheritance

8.12.3.16.3 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 Click to hide 2 inherited attributes
IfcFillAreaStyleTiles (3)
1	TilingPattern	LIST [2:2] OF IfcVector	A two direction repeat factor defining the shape and relative positioning of the tiles. IFC4-CHANGE The attribute type has changed to directly reference two IfcVector's.
2	Tiles	SET [1:?] OF IfcStyledItem	A set of constituents of the tile being a styled item that is used as the annotation symbol for tiling the filled area. IFC4-CHANGE The data type has been changed to IfcStyledItem. NOTE Only IfcStyledItem's that refer to a compatible geometric representation item and presentation style shall be used.
3	TilingScale	IfcPositiveRatioMeasure	The scale factor applied to each tile as it is placed in the annotation fill area.

Table 8.12.3.16.C

8.12.3.16.4 Formal representation

ENTITY IfcFillAreaStyleTiles
 SUBTYPE OF (IfcGeometricRepresentationItem);
	TilingPattern : LIST [2:2] OF IfcVector;
	Tiles : SET [1:?] OF IfcStyledItem;
	TilingScale : IfcPositiveRatioMeasure;
END_ENTITY;