reworked Vector::reflect() to reflect an INCOMING ray

git-svn-id: svn://anubis/fart/trunk@371 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Vector.h

@@ -60,9 +60,7 @@ class Vector
 
         Vector reflect(const Vector & target) const
         {
-            Vector projected = proj(target);
-            Vector me_to_proj = projected - (*this);
-            return (*this) + me_to_proj * 2.0;
+            return (*this) - target * (2 * dot(target));
         }
 
         Vector getPerpendicular() const
@@ -102,21 +100,23 @@ class Vector
         }
 
         /* Compute the dot-product of two vectors */
-        double operator%(const Vector & v2) const
+        double dot(const Vector & v2) const
         {
             return m_array[0] * v2.m_array[0]
                 + m_array[1] * v2.m_array[1]
                 + m_array[2] * v2.m_array[2];
         }
+        double operator%(const Vector & v2) const { return dot(v2); }
 
         /* Compute the cross-product of two vectors */
-        Vector operator*(const Vector & v2) const
+        Vector cross(const Vector & v2) const
         {
             return Vector(
                     m_array[1] * v2.m_array[2] - m_array[2] * v2.m_array[1],
                     m_array[2] * v2.m_array[0] - m_array[0] * v2.m_array[2],
                     m_array[0] * v2.m_array[1] - m_array[1] * v2.m_array[0]);
         }
+        Vector operator*(const Vector & v2) const { return cross(v2); }
 
         Vector operator+(const Vector & v2) const
         {