Function directx_math::XMVector2AngleBetweenNormalsEst [−][src]
pub fn XMVector2AngleBetweenNormalsEst(N1: FXMVECTOR, N2: FXMVECTOR) -> XMVECTOR
Estimates the radian angle between two normalized 2D vectors.
Parameters
N1
Normalized 2D vector.
N2
Normalized 2D 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.