From d0d9683df8398696147e7ee1fcffb2e4e957008c Mon Sep 17 00:00:00 2001 From: Daniel Mueller Date: Sat, 4 Apr 2020 14:39:19 -0700 Subject: Remove vendored dependencies While it appears that by now we actually can get successful builds without Cargo insisting on Internet access by virtue of using the --frozen flag, maintaining vendored dependencies is somewhat of a pain point. This state will also get worse with upcoming changes that replace argparse in favor of structopt and pull in a slew of new dependencies by doing so. Then there is also the repository structure aspect, which is non-standard due to the way we vendor dependencies and a potential source of confusion. In order to fix these problems, this change removes all the vendored dependencies we have. Delete subrepo argparse/:argparse Delete subrepo base32/:base32 Delete subrepo cc/:cc Delete subrepo cfg-if/:cfg-if Delete subrepo getrandom/:getrandom Delete subrepo lazy-static/:lazy-static Delete subrepo libc/:libc Delete subrepo nitrokey-sys/:nitrokey-sys Delete subrepo nitrokey/:nitrokey Delete subrepo rand/:rand --- rand/rand_distr/src/unit_sphere.rs | 94 -------------------------------------- 1 file changed, 94 deletions(-) delete mode 100644 rand/rand_distr/src/unit_sphere.rs (limited to 'rand/rand_distr/src/unit_sphere.rs') diff --git a/rand/rand_distr/src/unit_sphere.rs b/rand/rand_distr/src/unit_sphere.rs deleted file mode 100644 index 8e0c361..0000000 --- a/rand/rand_distr/src/unit_sphere.rs +++ /dev/null @@ -1,94 +0,0 @@ -// Copyright 2018-2019 Developers of the Rand project. -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -use rand::Rng; -use crate::{Distribution, Uniform, uniform::SampleUniform}; -use crate::utils::Float; - -/// Samples uniformly from the surface of the unit sphere in three dimensions. -/// -/// Implemented via a method by Marsaglia[^1]. -/// -/// -/// # Example -/// -/// ``` -/// use rand_distr::{UnitSphere, Distribution}; -/// -/// let v: [f64; 3] = UnitSphere.sample(&mut rand::thread_rng()); -/// println!("{:?} is from the unit sphere surface.", v) -/// ``` -/// -/// [^1]: Marsaglia, George (1972). [*Choosing a Point from the Surface of a -/// Sphere.*](https://doi.org/10.1214/aoms/1177692644) -/// Ann. Math. Statist. 43, no. 2, 645--646. -#[derive(Clone, Copy, Debug)] -pub struct UnitSphere; - -impl Distribution<[N; 3]> for UnitSphere { - #[inline] - fn sample(&self, rng: &mut R) -> [N; 3] { - let uniform = Uniform::new(N::from(-1.), N::from(1.)); - loop { - let (x1, x2) = (uniform.sample(rng), uniform.sample(rng)); - let sum = x1*x1 + x2*x2; - if sum >= N::from(1.) { - continue; - } - let factor = N::from(2.) * (N::from(1.0) - sum).sqrt(); - return [x1 * factor, x2 * factor, N::from(1.) - N::from(2.)*sum]; - } - } -} - -#[cfg(test)] -mod tests { - use crate::Distribution; - use super::UnitSphere; - - /// Assert that two numbers are almost equal to each other. - /// - /// On panic, this macro will print the values of the expressions with their - /// debug representations. - macro_rules! assert_almost_eq { - ($a:expr, $b:expr, $prec:expr) => ( - let diff = ($a - $b).abs(); - if diff > $prec { - panic!(format!( - "assertion failed: `abs(left - right) = {:.1e} < {:e}`, \ - (left: `{}`, right: `{}`)", - diff, $prec, $a, $b)); - } - ); - } - - #[test] - fn norm() { - let mut rng = crate::test::rng(1); - for _ in 0..1000 { - let x: [f64; 3] = UnitSphere.sample(&mut rng); - assert_almost_eq!(x[0]*x[0] + x[1]*x[1] + x[2]*x[2], 1., 1e-15); - } - } - - #[test] - fn value_stability() { - let mut rng = crate::test::rng(2); - let expected = [ - [0.03247542860231647, -0.7830477442152738, 0.6211131755296027], - [-0.09978440840914075, 0.9706650829833128, -0.21875184231323952], - [0.2735582468624679, 0.9435374242279655, -0.1868234852870203], - ]; - let samples: [[f64; 3]; 3] = [ - UnitSphere.sample(&mut rng), - UnitSphere.sample(&mut rng), - UnitSphere.sample(&mut rng), - ]; - assert_eq!(samples, expected); - } -} -- cgit v1.2.1