Revit 2025.3 API
TransformBasis |
The basis of the X axis of this transformation.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
public XYZ BasisX { get; set; }
Public Property BasisX As XYZ Get Set
public: property XYZ^ BasisX { XYZ^ get (); void set (XYZ^ value); }
member BasisX : XYZ with get, set
Property Value
XYZ
Exception | Condition |
---|---|
InvalidOperationException | Thrown when the transform is internally marked as read-only. |

The X axis of the old coordinate system in the new coordinate system,
or the 1st column of the conventional 3x4 matrix representation.
See Also