Function XMVector3Reflect

pub fn XMVector3Reflect(Incident: FXMVECTOR, Normal: FXMVECTOR) -> FXMVECTOR

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

Parameters

Incident 3D incident vector to reflect.

Normal 3D normal vector to reflect the incident vector across.

Return value

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;

Reference

https://docs.microsoft.com/en-us/windows/win32/api/directxmath/nf-directxmath-XMVector3Reflect