Boundingboxes should be ready.

Next step (later) would be to properly use them other than group to lower the number of intersection calculation per ray.

source/tuple.cpp

@@ -43,4 +43,28 @@ Tuple Tuple::cross(const Tuple &b) const
 Tuple Tuple::reflect(const Tuple &normal)
 {
     return *this - normal * 2 * this->dot(normal);
+}
+
+void Tuple::fixPoint()
+{
+    if (isnan(this->x) || isnan(this->y) || isnan(this->z))
+    {
+        /* w is probably broken, so fix it */
+        this->w = 1;
+    }
+}
+
+void Tuple::fixVector()
+{
+
+    if (isnan(this->x) || isnan(this->y) || isnan(this->z))
+    {
+        /* w is probably broken, so fix it */
+        this->w = 0;
+    }
+}
+
+bool Tuple::isRepresentable()
+{
+    return !(isnan(this->x) || isnan(this->y) || isnan(this->z));
 }