XMQuaternionNormalizeEst

Estimates the normalized version of a quaternion.

Syntax

XMVECTOR XMQuaternionNormalizeEst(
         XMVECTOR Q
)  

Parameters

Q
Type: XMVECTOR 

A quaternion for which to estimate the normalized version.

Return value

Type: XMVECTOR 

An XMVECTOR union that is the estimate of the normalized version of a quaternion.

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.

This function internally calls the XMVector4NormalizeEst function.

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.

Requirements

Header: Declared in directxmath.h.