Revit 2025.3 API
TransformBasis Property |
Defines the basis of the old coordinate system in the new coordinate system.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
public XYZ this[ int idx ] { get; set; }
Public Property Basis ( idx As Integer ) As XYZ Get Set
public: property XYZ^ Basis[int idx] { XYZ^ get (int idx); void set (int idx, XYZ^ value); }
member Basis : XYZ with get, set
Parameters
- idx Int32
- The index of the basis vector: 0, 1 or 2.
Property Value
XYZ
Exception | Condition |
---|---|
ArgumentOutOfRangeException | Thrown when the given index is larger than 2 in the getter and setter. |
InvalidOperationException | Thrown when the transform is internally marked as read-only. |

This corresponds to the first three column vectors of the conventional 3x4 matrix
representation.
See Also