XMConvertFloatToHalfStream
XMConvertHalfToFloatStream
XMMatrixDecompose
XMPlaneTransformStream
XMVector2TransformCoordStream
XMVector2TransformNormalStream
XMVector2TransformStream
XMVector3ProjectStream
XMVector3TransformCoordStream
XMVector3TransformNormalStream
XMVector3TransformStream
XMVector3UnprojectStream
XMVector4TransformStream
Expand Minimize

XMQuaternionInverse method

Computes the inverse of a quaternion.

Syntax


XMVECTOR XMQuaternionInverse(
  [in]  XMVECTOR Q
);

Parameters

Q [in]

Quaternion to invert.

Return value

Returns the inverse of Q.

Remarks

The DirectXMath quaternion functions use an XMVECTOR 4-vector to represent quaternions, where the X, Y, and Z components are the vector part and the W component is the scalar part.

The following pseudocode demonstrates the operation of the function:


XMVECTOR Result;

float LengthSq = Q.x * Q.x + Q.y * Q.y + Q.z * Q.z + Q.w * Q.w;

Result.x = -Q.x / LengthSq;
Result.y = -Q.y / LengthSq;
Result.z = -Q.z / LengthSq;
Result.w = Q.w / LengthSq;

return Result;

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

 

 

Community Additions

ADD
Show:
© 2014 Microsoft