Estimates the normalized version of a quaternion.
XMVECTOR XM_CALLCONV XMQuaternionNormalizeEst( FXMVECTOR Q );
A quaternion for which to estimate the normalized version.
An XMVECTOR union that is the estimate of the normalized version of a quaternion.
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.
This function internally calls the XMVector4NormalizeEstfunction.
Est functions offer increased performance at the expense of reduced accuracy.
Est functions are appropriate for non-critical calculations where accuracy can be sacrificed for speed.
The exact amount of lost accuracy and speed increase are platform dependent.