XMVectorATanEst function (directxmath.h)

Article
07/12/2022

Estimates the arctangent of each component of an XMVECTOR.

Syntax

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

Parameters

[in] V

Vector for which to compute the arctangent.

Return value

Returns a vector whose components are estimates of the arctangent of the corresponding components of V.

Remarks

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.

This function uses a 9-degree minimax approximation.

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)