added main/Lighting module, added operator-() to util/Vector, added m_shininess to main/Light

git-svn-id: svn://anubis/fart/trunk@71 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Vector.cc

@@ -26,6 +26,15 @@ Vector & Vector::normalize()
     return *this;
 }
 
+Vector Vector::operator-() const
+{
+    Vector result;
+    result[0] = -m_array[0];
+    result[1] = -m_array[1];
+    result[2] = -m_array[2];
+    return result;
+}
+
 double Vector::mag() const
 {
     return sqrt(m_array[0] * m_array[0]

util/Vector.h

@@ -11,6 +11,7 @@ class Vector
         Vector(double x, double y, double z);
         double & operator[](int idx) { return m_array[idx]; }
         double operator[](int idx) const { return m_array[idx]; }
+        Vector operator-() const;
         Vector & normalize();
         double mag() const;
         double mag2() const;