IFC (IFC4X3_ADD2) under development IfcFillAreaStyleTiles 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 , formula

Figure shows the use of a vector for hatch line distances

IfcFillAreaStyleTiles_Fig1.gif 12,9 KB
Figure — two vectors as two direction repeat factor Entity inheritance 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.

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.

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.

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.

3 TilingScale IfcPositiveRatioMeasure

The scale factor applied to each tile as it is placed in the annotation fill area.

Table Formal representation

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

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Is this page difficult to understand? Let us know! Changelog IFC4

  • attribute Tiles type, Changed from "set[1:?] of IfcFillAreaStyleTileShapeSelect" to "set[1:?] of IfcStyledItem"
  • attribute TilingPattern type, Changed from "IfcOneDirectionRepeatFactor" to "list[2:2] of IfcVector"