nalgebra/nalgebra-glm/src/gtx/norm.rs
2018-09-23 17:10:49 +02:00

57 lines
1.5 KiB
Rust

use na::{Real, DefaultAllocator};
use traits::{Alloc, Dimension};
use aliases::TVec;
/// The squared distance between two points.
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()
}
/// The l1-norm of `x - y`.
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))
}
/// The l1-norm of `v`.
pub fn l1_norm<N: Real, D: Dimension>(v: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
::comp_add(&v.abs())
}
/// The l2-norm of `x - y`.
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))
}
/// The l2-norm of `v`.
pub fn l2_norm<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm()
}
/// The squared magnitude of `x`.
pub fn length2<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm_squared()
}
/// The squared magnitude of `x`.
pub fn magnitude2<N: Real, D: Dimension>(x: &TVec<N, D>) -> N
where DefaultAllocator: Alloc<N, D> {
x.norm_squared()
}
//pub fn lxNorm<N: Real, D: Dimension>(x: &TVec<N, D>, y: &TVec<N, D>, unsigned int Depth) -> N
// where DefaultAllocator: Alloc<N, D> {
// unimplemented!()
//}
//
//pub fn lxNorm<N: Real, D: Dimension>(x: &TVec<N, D>, unsigned int Depth) -> N
// where DefaultAllocator: Alloc<N, D> {
// unimplemented!()
//}