working on shadows but they are appearing in weird places...

git-svn-id: svn://anubis/fart/trunk@185 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Ray.cc

@@ -31,3 +31,8 @@ std::ostream & operator<<(std::ostream & out, const Ray & r)
     out << "(" << r.getOrigin() << " -> " << r.getDirection() << ")";
     return out;
 }
+
+Ray Ray::shift(double amt)
+{
+    return Ray(getPositionAt(amt), m_direction);
+}

util/Ray.h

@@ -14,6 +14,7 @@ class Ray
         const Vector & getDirection() const { return m_direction; }
         Vector getPositionAt(double dist) const;
         Vector operator[](double dist) const { return getPositionAt(dist); }
+        Ray shift(double amt);
 
     protected:
         Vector  m_origin;