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use na::{Real, DefaultAllocator};
use traits::{Alloc, Dimension};
use aliases::TVec;
pub fn distance2<N: Real, D: Dimension>(p0: &TVec<N, D>, p1: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
(p1 - p0).norm_squared()
}
pub fn l1_distance<N: Real, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
l1_norm(&(y - x))
}
pub fn l1_norm<N: Real, D: Dimension>(v: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
::comp_add(&v.abs())
}
pub fn l2_distance<N: Real, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
l2_norm(&(y - x))
}
pub fn l2_norm<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm()
}
pub fn length2<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm_squared()
}
pub fn magnitude2<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm_squared()
}