XMVector3NormalizeEst function (directxmath.h)

Article
07/12/2022

Estimates the normalized version of a 3D vector.

Syntax

XMVECTOR XM_CALLCONV XMVector3NormalizeEst(
  [in] FXMVECTOR V
) noexcept;

Parameters

[in] V

3D vector.

Return value

Returns an estimate of the normalized version of V.

Remarks

For a vector with 0 length or infinite length, this function returns a vector of QNaN.

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 (include DirectXMath.h)

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