[−][src]Function directx_math::XMPlaneDotNormal
pub fn XMPlaneDotNormal(P: FXMVECTOR, V: FXMVECTOR) -> XMVECTOR
Calculates the dot product between the normal vector of a plane and a 3D vector.
Parameters
P
XMVECTOR describing the plane coefficients (A
, B
, C
, D
) for the plane equation Ax+By+Cz+D=0
.
V
3D vector to use in the dot product. The w
component of V
is always treated as if is 0.0
.
Return value
Returns the dot product between the normal vector of the plane and V
replicated into each of the four
components of the returned XMVECTOR.
Remarks
This function is useful for calculating the angle between the normal vector of the plane, and another normal vector. The following pseudocode demonstrates the operation of the function.
XMVECTOR vectorOut;
vectorOut.x = P.x * V.x + P.y * V.y + P.z * V.z;
vectorOut.y = P.x * V.x + P.y * V.y + P.z * V.z;
vectorOut.z = P.x * V.x + P.y * V.y + P.z * V.z;
vectorOut.w = P.x * V.x + P.y * V.y + P.z * V.z;
return vectorOut;
Reference
https://docs.microsoft.com/en-us/windows/win32/api/directxmath/nf-directxmath-XMPlaneDotNormal