Returns an instance of the identity matrix.
Assembly: Microsoft.Xna.Framework.Math (in Microsoft.Xna.Framework.Math.dll)
Except for the main diagonal, whose elements are all ones, the identity matrix is a square matrix composed of zeros. Unlike all other matrix multiplications, the multiplication between an identity matrix and another matrix is commutative.
This is useful for initializing a matrix to a known value before you perform additional operations, such as a transformation.
Multiplying a matrix with its inverse results in an identity matrix.
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