XMVector2AngleBetweenNormalsEst function (directxmath.h)

Article
02/22/2024

Estimates the radian angle between two normalized 2D vectors.

Syntax

XMVECTOR XM_CALLCONV XMVector2AngleBetweenNormalsEst(
  [in] FXMVECTOR N1,
  [in] FXMVECTOR N2
) noexcept;

Parameters

[in] N1

Normalized 2D vector.

[in] N2

Normalized 2D vector.

Return value

Returns a vector. The estimate of the radian angle (between N1 and N2) is replicated to each of the components.

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.

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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