XMVector3RefractV

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

Syntax

XMVECTOR XMVector3RefractV(
         XMVECTOR Incident,
         XMVECTOR Normal,
         XMVECTOR RefractionIndex
)  

Parameters

Incident
Type: XMVECTOR 

3D incident vector to refract.

Normal
Type: XMVECTOR 

3D normal vector to refract the incident vector through.

RefractionIndex
Type: XMVECTOR 

3D vector whose x, y, and z-components are equal to the index of refraction.

Return value

Type: XMVECTOR 

Returns the refracted incident vector. If the refraction index and the angle between the incident vector and the normal are such that the result is a total internal reflection, the function will return a vector of the form < 0.0f, 0.0f, 0.0f, undefined >.

Remarks

This function is identical to XMVector3Refract except that the RefractionIndex is supplied using a 3D vector instead of a float value.

Requirements

Header: Declared in directxmath.h.