nf-directxmath-xmvector3reflect.md

UID	title	description	helpviewer_keywords	old-location	tech.root	ms.assetid	ms.date	ms.keywords	req.header	req.include-header	req.target-type	req.target-min-winverclnt	req.target-min-winversvr	req.kmdf-ver	req.umdf-ver	req.ddi-compliance	req.unicode-ansi	req.idl	req.max-support	req.namespace	req.assembly	req.type-library	req.lib	req.dll	req.irql	targetos	req.typenames	req.redist	ms.custom	f1_keywords	dev_langs	topic_type	api_type	api_location	api_name
NF:directxmath.XMVector3Reflect	XMVector3Reflect function (directxmath.h)	Reflects an incident 3D vector across a 3D normal vector.	Use DirectX..XMVector3Reflect XMVector3Reflect XMVector3Reflect method [DirectX Math Support APIs] dxmath.xmvector3reflect	dxmath\xmvector3reflect.htm	dxmath	M:Microsoft.directx_sdk.geometric.XMVector3Reflect(XMVECTOR,XMVECTOR)	12/05/2018	Use DirectX..XMVector3Reflect, XMVector3Reflect, XMVector3Reflect method [DirectX Math Support APIs], dxmath.xmvector3reflect	directxmath.h	DirectXMath.h	Windows									Use DirectX.						Windows			19H1	XMVector3Reflect directxmath/XMVector3Reflect	c++	APIRef kbSyntax	COM	directxmathvector.inl	XMVector3Reflect

XMVector3Reflect function

-description

Reflects an incident 3D vector across a 3D normal vector.

-parameters

-param Incident [in]

3D incident vector to reflect.

-param Normal [in]

3D normal vector to reflect the incident vector across.

-returns

Returns the reflected incident angle.

-remarks

The following pseudocode demonstrates the operation of the function:

XMVECTOR Result;

float s = 2.0f * ( Incident.x * Normal.x + Incident.y * Normal.y + Incident.z * Normal.z );

Result.x = Incident.x - s * Normal.x;
Result.y = Incident.y - s * Normal.y;
Result.z = Incident.z - s * Normal.z;
Result.w = undefined;

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.

-see-also

DirectXMath Library 3D Vector Geometric Functions