Function XMQuaternionIsIdentity

pub fn XMQuaternionIsIdentity(Q: FXMVECTOR) -> bool

Tests whether a specific quaternion is the identity quaternion.

Parameters

Q Quaternion to test.

Return value

Returns true if Q is the identity quaternion, or false otherwise.

Remarks

The DirectXMath quaternion functions use an XMVECTOR 4-vector to represent quaternions, where the X, Y, and Z components are the vector part and the W component is the scalar part.

Reference

https://docs.microsoft.com/en-us/windows/win32/api/directxmath/nf-directxmath-XMQuaternionIsIdentity