The IfcDirection provides a direction in two or three dimensional space depending on the number of DirectionRatio's provided. The IfcDirection does not imply a vector length, and the direction ratios does not have to be normalized.
|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|
|1||DirectionRatios||LIST [2:3] OF IfcReal||
The components in the direction of X axis (DirectionRatios), of Y axis (DirectionRatios), and of Z axis (DirectionRatios)
This attribute is formally derived.
The space dimensionality of this class, defined by the number of real in the list of DirectionRatios.
The magnitude of the direction vector shall be greater than zero.
ENTITY IfcDirection SUBTYPE OF (IfcGeometricRepresentationItem); DirectionRatios : LIST [2:3] OF IfcReal; DERIVE Dim : IfcDimensionCount := HIINDEX(DirectionRatios); WHERE MagnitudeGreaterZero : SIZEOF(QUERY(Tmp <* DirectionRatios | Tmp <> 0.0)) > 0; END_ENTITY;