From 122dea96a0d8d78c15bc1078520732926d7bd871 Mon Sep 17 00:00:00 2001
From: John Downey <jdowney@gmail.com>
Date: Sun, 4 Jul 2021 21:32:03 -0500
Subject: [PATCH] Cleanup uses of num crate

---
 src/matrix.rs | 4 +---
 src/sphere.rs | 3 +--
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/matrix.rs b/src/matrix.rs
index f6165ea..6beab90 100644
--- a/src/matrix.rs
+++ b/src/matrix.rs
@@ -1,9 +1,7 @@
 use crate::{point, vector, Point, Vector, EPSILON};
 use approx::AbsDiffEq;
-use core::f64;
 use generic_array::{ArrayLength, GenericArray};
-use num::Integer;
-use num::Zero;
+use num::{Integer, Zero};
 use std::{
     iter::{self, FromIterator},
     marker::PhantomData,
diff --git a/src/sphere.rs b/src/sphere.rs
index 2e7a390..e7bf454 100644
--- a/src/sphere.rs
+++ b/src/sphere.rs
@@ -1,6 +1,5 @@
 use crate::{intersection, material, point, Intersections, Material, Matrix4, Ray, Vector};
 use derive_builder::Builder;
-use num::Float;
 use point::Point;
 
 pub fn sphere() -> Sphere {
@@ -27,7 +26,7 @@ impl Sphere {
         if discriminant.is_sign_negative() {
             Intersections::empty()
         } else {
-            let discriminant_root = Float::sqrt(discriminant);
+            let discriminant_root = discriminant.sqrt();
             let t1 = (-b - discriminant_root) / (2.0 * a);
             let t2 = (-b + discriminant_root) / (2.0 * a);