D3DXQuaternionIsIdentity

Determines if a quaternion is an identity quaternion.

D3DXQuaternionIsIdentity( _ 
    Q As D3DQUATERNION) As Long 

Parameters

Q

D3DQUATERNION type that will be tested for identity.

Return Values

If the quaternion is an identity quaternion, 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

D3DXQuaternionIdentity