added util/Color module, updated Light and PointLight

git-svn-id: svn://anubis/fart/trunk@49 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Color.cc

@@ -0,0 +1,40 @@
+
+#include "Color.h"
+
+const Color Color::black = Color(0, 0, 0);
+const Color Color::white = Color(1, 1, 1);
+const Color Color::red = Color(1, 0, 0);
+const Color Color::green = Color(0, 1, 0);
+const Color Color::blue = Color(0, 0, 1);
+
+Color::Color()
+{
+    r = g = b = 1.0;
+}
+
+Color::Color(double r, double g, double b)
+{
+    this->r = r;
+    this->g = g;
+    this->b = b;
+}
+
+Color Color::operator*(double scale)
+{
+    return Color(r * scale, g * scale, b * scale);
+}
+
+Color Color::operator/(double scale)
+{
+    return Color(r / scale, g / scale, b / scale);
+}
+
+Color operator+(const Color & c1, const Color & c2)
+{
+    return Color(c1.r + c2.r, c1.g + c2.g, c1.b + c2.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

@@ -0,0 +1,27 @@
+
+#ifndef COLOR_H
+#define COLOR_H COLOR_H
+
+class Color
+{
+    public:
+        double r, g, b;
+
+        Color();
+        Color(double r, double g, double b);
+
+        Color operator*(double scale);
+        Color operator/(double scale);
+
+        static const Color black;
+        static const Color white;
+        static const Color red;
+        static const Color green;
+        static const Color blue;
+};
+
+Color operator+(const Color & c1, const Color & c2);
+Color operator-(const Color & c1, const Color & c2);
+
+#endif
+