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-rw-r--r--rand/rand_distr/src/unit_disc.rs66
1 files changed, 0 insertions, 66 deletions
diff --git a/rand/rand_distr/src/unit_disc.rs b/rand/rand_distr/src/unit_disc.rs
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index 97abc2f..0000000
--- a/rand/rand_distr/src/unit_disc.rs
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@@ -1,66 +0,0 @@
-// Copyright 2019 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, 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 unit disc in two dimensions.
-///
-/// Implemented via rejection sampling.
-///
-///
-/// # Example
-///
-/// ```
-/// use rand_distr::{UnitDisc, Distribution};
-///
-/// let v: [f64; 2] = UnitDisc.sample(&mut rand::thread_rng());
-/// println!("{:?} is from the unit Disc.", v)
-/// ```
-#[derive(Clone, Copy, Debug)]
-pub struct UnitDisc;
-
-impl<N: Float + SampleUniform> Distribution<[N; 2]> for UnitDisc {
- #[inline]
- fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> [N; 2] {
- let uniform = Uniform::new(N::from(-1.), N::from(1.));
- let mut x1;
- let mut x2;
- loop {
- x1 = uniform.sample(rng);
- x2 = uniform.sample(rng);
- if x1*x1 + x2*x2 <= N::from(1.) {
- break;
- }
- }
- [x1, x2]
- }
-}
-
-#[cfg(test)]
-mod tests {
- use crate::Distribution;
- use super::UnitDisc;
-
- #[test]
- fn value_stability() {
- let mut rng = crate::test::rng(2);
- let expected = [
- [0.018035709265959987, -0.4348771383120438],
- [-0.07982762085055706, 0.7765329819820659],
- [0.21450745997299503, 0.7398636984333291]
- ];
- let samples: [[f64; 2]; 3] = [
- UnitDisc.sample(&mut rng),
- UnitDisc.sample(&mut rng),
- UnitDisc.sample(&mut rng),
- ];
- assert_eq!(samples, expected);
- }
-}