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
);

Parameters

pQ [in]

Type: const D3DXQUATERNION*

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

Return value

Type: BOOL

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

Remarks

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

Requirements

Requirement	Value
Header	D3dx9math.h
Library	D3dx9.lib

See also

Math Functions

D3DXQuaternionIdentity