Calculates the dot product between an input plane and a 3D vector.
- P [in]
XMVECTOR describing the plane coefficients (A, B, C, D) for the plane equation
XMVECTOR vectorOut; vectorOut.x = P.x * V.x + P.y * V.y + P.z * V.z + P.w * 1.0f; vectorOut.y = P.x * V.x + P.y * V.y + P.z * V.z + P.w * 1.0f; vectorOut.z = P.x * V.x + P.y * V.y + P.z * V.z + P.w * 1.0f; vectorOut.w = P.x * V.x + P.y * V.y + P.z * V.z + P.w * 1.0f; return vectorOut;
- V [in]
3D vector to use in the dot product. The w component of V is always treated as if is 1.0f.
Returns the dot product between P and V replicated into each of the four components of the returned XMVECTOR.
This function can be useful in finding the signed distance from a point to a plane. The following pseudocode demonstrates the operation of the function.
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.