Function directx_math::XMVectorGetWPtr

pub fn XMVectorGetWPtr(w: &mut f32, V: FXMVECTOR)

Retrieve the w component of an XMVECTOR Data Type containing floating-point data, and storing that component's value in an instance of float referred to by a pointer.

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