XMConvertFloatToHalfStream
XMConvertHalfToFloatStream
XMMatrixDecompose
XMPlaneTransformStream
XMVector2TransformCoordStream
XMVector2TransformNormalStream
XMVector2TransformStream
XMVector3ProjectStream
XMVector3TransformCoordStream
XMVector3TransformNormalStream
XMVector3TransformStream
XMVector3UnprojectStream
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XMVectorSqrtEst method

Estimates the per-component square root of a vector.

Syntax


XMVECTOR XMVectorSqrtEst(
  [in]  XMVECTOR V
);

Parameters

V [in]

Vector whose square root is estimated.

Return value

Returns a vector. Each component is an estimate of the square-root of the corresponding component of V.

Remarks

The square-root operation handles special input values as follows.

Input ValueReturn Value
+Infinity+Infinity
+0.0f+0.0f
-0.0f-0.0f
< 0.0fQNaN*

 

* Note that due to implementation details, VMX128 returns -Infinity in this case instead of the standard 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

Namespace

Use DirectX.

Header

DirectXMath.h

See also

XMVectorSqrt

 

 

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