Mercurial > repos > non-riemannian-opt / file comparison
comparison: src/zero.rs
src/zero.rs
- changeset 6
- df9628092285
- child 13
- f67949050a32
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| 5:f248e1434c3b | 6:df9628092285 |
|---|---|
| 1 | |
| 2 use alg_tools::mapping::Apply; | |
| 3 use crate::manifold::ManifoldPoint; | |
| 4 use crate::fb::{Grad, Desc, Prox}; | |
| 5 use std::marker::PhantomData; | |
| 6 | |
| 7 /// Zero function on manifolds. | |
| 8 pub struct ZeroFn<M : ManifoldPoint> { | |
| 9 _phantoms : PhantomData<M> | |
| 10 } | |
| 11 | |
| 12 impl<M: ManifoldPoint> ZeroFn<M> { | |
| 13 pub fn new() -> Self { | |
| 14 ZeroFn{_phantoms : PhantomData } | |
| 15 } | |
| 16 } | |
| 17 | |
| 18 impl<M : ManifoldPoint> Apply<M> for ZeroFn<M> { | |
| 19 type Output = f64; | |
| 20 | |
| 21 fn apply(&self, _x : M) -> Self::Output { | |
| 22 0.0 | |
| 23 } | |
| 24 } | |
| 25 | |
| 26 impl<'a, M : ManifoldPoint> Apply<&'a M> for ZeroFn<M> { | |
| 27 type Output = f64; | |
| 28 | |
| 29 fn apply(&self, _x : &'a M) -> Self::Output { | |
| 30 0.0 | |
| 31 } | |
| 32 } | |
| 33 | |
| 34 impl<M : ManifoldPoint> Desc<M> for ZeroFn<M> { | |
| 35 fn desc(&self, _τ : f64, x : M) -> M { | |
| 36 x | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 impl<M : ManifoldPoint> Grad<M> for ZeroFn<M> { | |
| 41 fn grad(&self, x : &M) -> M::Tangent { | |
| 42 x.tangent_origin() | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 impl<M : ManifoldPoint> Prox<M> for ZeroFn<M> { | |
| 47 fn prox(&self, _τ : f64, x : M) -> M { | |
| 48 x | |
| 49 } | |
| 50 } |
