matrix_build_identity

This will build a 4x4 identity matrix with the following structure:

[1 0 0 0]
[0 1 0 0]
[0 0 1 0]
[0 0 0 1]

Syntax:

matrix_build_identity();

Returns:

Matrix Array

Example:

i_matrix = matrix_build_identity();

The above code will create an identity matrix and store its index in a variable for future use.