Defines the basis of the old coordinate system in the new coordinate system.

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

Syntax

C#
`public XYZ this[ int idx ] { get; set; }`

Visual Basic
`Public Property Basis ( _ idx As Integer _ ) As XYZ Get Set`

Visual C++
`public: property XYZ^ Basis[int idx] { XYZ^ get (int idx); void set (int idx, XYZ^ value); }`

Remarks

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

Exception	Condition
Autodesk.Revit.ExceptionsArgumentOutOfRangeException	Thrown when the given index is larger than 2 in the getter and setter.
Autodesk.Revit.ExceptionsInvalidOperationException	Thrown when the transform is internally marked as read-only.