using Color instead of Vector where appropriate, updated main/Light to use diffuse and specular lights

git-svn-id: svn://anubis/fart/trunk@67 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Color.cc

@@ -29,6 +29,20 @@ Color Color::operator/(double scale)
     return Color(r / scale, g / scale, b / scale);
 }
 
+Color & Color::operator+=(const Color & other)
+{
+    r += other.r;
+    g += other.g;
+    b += other.b;
+}
+
+Color & Color::operator-=(const Color & other)
+{
+    r += other.r;
+    g += other.g;
+    b += other.b;
+}
+
 Color operator+(const Color & c1, const Color & c2)
 {
     return Color(c1.r + c2.r, c1.g + c2.g, c1.b + c2.b);

util/Color.h

@@ -12,6 +12,8 @@ class Color
 
         Color operator*(double scale);
         Color operator/(double scale);
+        Color & operator+=(const Color & other);
+        Color & operator-=(const Color & other);
 
         static const Color black;
         static const Color white;