From b976ce98be7275bf92e01f6c86bf2b694530481e Mon Sep 17 00:00:00 2001
From: Nat Lasseter <user@4574.co.uk>
Date: Thu, 13 Jun 2024 13:24:53 +0100
Subject: Done C10, Materials

---
 lib/vec3.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lib/vec3.rb')

diff --git a/lib/vec3.rb b/lib/vec3.rb
index 08cbf69..3069b65 100644
--- a/lib/vec3.rb
+++ b/lib/vec3.rb
@@ -56,10 +56,18 @@ class Vec3
     self / mag
   end
 
+  def reflect(normal)
+    self - normal * dot(normal) * 2
+  end
+
   def in_unit_sphere?
     mag_sqr < 1
   end
 
+  def near_zero?(s = 1e-8)
+    @x.abs < s && @y.abs < s && @z.abs < s
+  end
+
   def to_s
     "{#{@x}, #{@y}, #{@z}}"
   end
-- 
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