lib/mittsu/math/ray.rb in mittsu-0.3.2 vs lib/mittsu/math/ray.rb in mittsu-0.3.3

@@ -136,10 +136,10 @@
       v1.sub_vectors(sphere.center, @origin)
       tca = v1.dot(@direction)
       d2 = v1.dot(v1) - tca * tca
       radius2 = sphere.radius * sphere.radius
       return nil if d2 > radius2
-      thc = Math.sqrt(radius2 - d2)
+      thc = ::Math.sqrt(radius2 - d2)
       # t0 = first intersect point - entrance on front of sphere
       t0 = tca - thc
       # t1 = second intersect point - exit point on back of sphere
       t1 = tca + thc
       # test to see if both t0 and t1 are behind the ray - if so, return nil