From 9e67a8260fee8f8a423a3131bcf13db3b9de6922 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <user@4574.co.uk>
Date: Thu, 27 Jun 2024 15:43:38 +0100
Subject: maths.Pow turned out to be seriously terrible

---
 hittable.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'hittable.go')

diff --git a/hittable.go b/hittable.go
index ac5e996..73e2e3c 100644
--- a/hittable.go
+++ b/hittable.go
@@ -42,8 +42,8 @@ func (s Sphere) Hit(r Ray, ray_t Interval) (rec HitRecord) {
   oc := s.Origin.Sub(r.Origin);
   a := r.Direction.MagSqr();
   h := r.Direction.Dot(oc);
-  c := oc.MagSqr() - maths.Pow(s.Radius, 2);
-  disc := maths.Pow(h, 2) - a*c;
+  c := oc.MagSqr() - s.Radius * s.Radius;
+  disc := h * h - a * c;
 
   if disc < 0 {
     return;
-- 
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