maths.Pow turned out to be seriously terrible

1 files changed, 2 insertions, 2 deletions

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;