XMQuaternionNormalizeEst function (directxmath.h)

Article
07/12/2022

Estimates the normalized version of a quaternion.

Syntax

XMVECTOR XM_CALLCONV XMQuaternionNormalizeEst(
  [in] FXMVECTOR Q
) noexcept;

Parameters

[in] Q

A quaternion for which to estimate the normalized version.

Return value

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.

Platform Requirements

Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.

Requirements

Requirement	Value
Target Platform	Windows
Header	directxmath.h