[−][src]Function directx_math::vector3d::geometric::XMVector3AngleBetweenNormalsEst
pub fn XMVector3AngleBetweenNormalsEst(
N1: FXMVECTOR,
N2: FXMVECTOR
) -> FXMVECTOR
Estimates the radian angle between two normalized 3D vectors.
Parameters
N1
Normalized 3D vector.
N2
Normalized 3D vector.
Return value
Returns a vector. The estimate of the radian angle (between N1
and N2
) is replicated to each of the
components.
Remarks
Est
functions offer increased performance at the expense of reduced accuracy. Est
functions are appropriate
for non-critical calculations where accuracy can be sacrificed for speed. The exact amount of lost accuracy
and speed increase are platform dependent.