Revit 2026 API
FrameIs |
Determine if this frame's basis is right-handed.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)
Syntax
public bool IsRightHanded()
Public Function IsRightHanded As Boolean
public: bool IsRightHanded()
member IsRightHanded : unit -> bool
Return Value
BooleanTrue if this frame's basis is right-handed, false if not.

The three basis vectors are "right-handed" if the triple vector product [vecX, vecY, vecZ]
is positive, or equivalently if dot(vecX x vecY, vecZ) is positive, where "dot" represents the dot product.
See Also