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XMScalarSinCosEst method

Estimates both the sine and cosine of a radian angle.

Syntax


VOID XMScalarSinCosEst(
  [out]  float *pSin,
  [out]  float *pCos,
  [in]   float Value
);

Parameters

pSin [out]

Address of a float that will contain the result of the sine of Value.

pCos [out]

Address of a float that will contain the result of the cosine of Value.

Value [in]

float value describing the radian angle.

Return value

This function does not return a value.

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 7-degree minimax approximation for sine; 6-degree for cosine.

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

Namespace

Use DirectX.

Header

DirectXMath.h

See also

XMScalarSinCos

 

 

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