Determines if this edge's topological direction on the Face is opposite to its parametric direction.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since: 2021

Syntax

C#
public bool IsFlippedOnFace(
	int index
)
Visual Basic
Public Function IsFlippedOnFace ( _
	index As Integer _
) As Boolean
Visual C++
public:
bool IsFlippedOnFace(
	int index
)

Parameters

index
Type: System..::..Int32
The index of the face (0 or 1).

Return Value

true if this edge's topological direction on the Face is opposite to its parametric direction, false if the topological direction agrees with the parametric direction.

Remarks

Outer edge loops on a Face are oriented counter-clockwise with respect to the Face's orientation, and inner loops are oriented clockwise. The topological direction of an edge on a face means the direction in which the edge's loop is being traversed.

Exceptions

ExceptionCondition
Autodesk.Revit.Exceptions..::..ArgumentOutOfRangeException Thrown when the specified index is not 0 or 1.

See Also