D3DXMatrixIsIdentity

Determines if a matrix is an identity matrix.

D3DXMatrixIsIdentity( _ 
    M As D3DMATRIX) As Long 

Parameters

M

D3DMATRIX type that will be tested for identity.

Return Values

If the matrix is an identity matrix, this function returns a nonzero value (True); otherwise, this function returns zero (False).

Error Codes

If the function fails, an error is raised and Err.Number can be set to one of the following values.

For information on trapping errors, see the Microsoft® Visual Basic® Error Handling topic.

See Also

D3DXMatrixIdentity