lib/mittsu/math/ray.rb in mittsu-0.1.7 vs lib/mittsu/math/ray.rb in mittsu-0.2.0

@@ -243,10 +243,9 @@
       # E1 = kEdge1, E2 = kEdge2, N = Cross(E1,E2)) by
       #   |Dot(D,N)|*b1 = sign(Dot(D,N))*Dot(D,Cross(Q,E2))
       #   |Dot(D,N)|*b2 = sign(Dot(D,N))*Dot(D,Cross(E1,Q))
       #   |Dot(D,N)|*t = -sign(Dot(D,N))*Dot(Q,N)
       d_dot_n = @direction.dot(normal)
-      sign
       if d_dot_n > 0
         return nil if backface_culling
         sign = 1.0
       elsif d_dot_n < 0
         sign = -1.0