D3DXQuaternionIsIdentity function

Note

The D3DX utility library is deprecated. We recommend that you use DirectXMath instead.

Determines if a quaternion is an identity quaternion.

Syntax

BOOL D3DXQuaternionIsIdentity(
  _In_ const D3DXQUATERNION *pQ
);

pQ [in]

Type: const D3DXQUATERNION*

Pointer to the D3DXQUATERNION structure that will be tested for identity.

If the quaternion is an identity quaternion, this function returns TRUE. Otherwise, this function returns FALSE.

Use D3DXQuaternionNormalize for any quaternion input that is not already normalized.

Requirement	Value
Header	D3dx9math.h
Library	D3dx9.lib