A vector can be hook normal if for a bar specified by index, the bar direction is not parallel with the vector.

Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2018

Syntax

C#
`public bool CanBeHookNormal( int barIndex, int end, XYZ normal )`

Visual Basic
`Public Function CanBeHookNormal ( _ barIndex As Integer, _ end As Integer, _ normal As XYZ _ ) As Boolean`

Visual C++
`public: bool CanBeHookNormal( int barIndex, int end, XYZ^ normal )`

barIndex: Type: SystemInt32
The index of bar for which it will try to see if hook normal is applicable.

normal: Type: Autodesk.Revit.DBXYZ
The hook plane normal that will be tested.

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsArgumentNullException	A non-optional argument was null