1 files changed, 0 insertions, 99 deletions
diff --git a/rand/rand_distr/src/unit_circle.rs b/rand/rand_distr/src/unit_circle.rs
deleted file mode 100644
index 5863a1a..0000000
--- a/rand/rand_distr/src/unit_circle.rs
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2018 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 edge of the unit circle in two dimensions.
-///
-/// Implemented via a method by von Neumann[^1].
-///
-///
-/// # Example
-///
-/// ```
-/// use rand_distr::{UnitCircle, Distribution};
-///
-/// let v: [f64; 2] = UnitCircle.sample(&mut rand::thread_rng());
-/// println!("{:?} is from the unit circle.", v)
-/// ```
-///
-/// [^1]: von Neumann, J. (1951) [*Various Techniques Used in Connection with
-///       Random Digits.*](https://mcnp.lanl.gov/pdf_files/nbs_vonneumann.pdf)
-///       NBS Appl. Math. Ser., No. 12. Washington, DC: U.S. Government Printing
-///       Office, pp. 36-38.
-#[derive(Clone, Copy, Debug)]
-pub struct UnitCircle;
-
-impl<N: Float + SampleUniform> Distribution<[N; 2]> for UnitCircle {
-    #[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;
-        let mut sum;
-        loop {
-            x1 = uniform.sample(rng);
-            x2 = uniform.sample(rng);
-            sum = x1*x1 + x2*x2;
-            if sum < N::from(1.) {
-                break;
-            }
-        }
-        let diff = x1*x1 - x2*x2;
-        [diff / sum, N::from(2.)*x1*x2 / sum]
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::Distribution;
-    use super::UnitCircle;
-
-    /// 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; 2] = UnitCircle.sample(&mut rng);
-            assert_almost_eq!(x[0]*x[0] + x[1]*x[1], 1., 1e-15);
-        }
-    }
-
-    #[test]
-    fn value_stability() {
-        let mut rng = crate::test::rng(2);
-        let expected = [
-                [-0.9965658683520504, -0.08280380447614634],
-                [-0.9790853270389644, -0.20345004884984505],
-                [-0.8449189758898707, 0.5348943112253227],
-            ];
-        let samples: [[f64; 2]; 3] = [
-                UnitCircle.sample(&mut rng),
-                UnitCircle.sample(&mut rng),
-                UnitCircle.sample(&mut rng),
-            ];
-        assert_eq!(samples, expected);
-    }
-}