improving Ray, Sphere, Solver, Scene a bit

git-svn-id: svn://anubis/fart/trunk@35 7f9b0f55-74a9-4bce-be96-3c2cd072584d

util/Ray.h

@@ -12,6 +12,7 @@ class Ray
         const Vector & getOrigin() const { return m_origin; }
         const Vector & getDirection() const { return m_direction; }
         Vector getPositionAt(double dist) const;
+        Vector operator[](double dist) const { return getPositionAt(dist); }
 
     private:
         Vector  m_origin;

util/Solver.cc

@@ -75,3 +75,8 @@ QuarticSolver::QuarticSolver(double a, double b, double c, double d, double e)
 Solver::Result QuarticSolver::solve()
 {
 }
+
+Solver::Result::Result()
+{
+    numResults = 0;
+}

util/Solver.h

@@ -5,11 +5,13 @@
 class Solver
 {
     public:
-        typedef struct
+        class Result
         {
-            int     numResults;
-            double  results[4];
-        } Result;
+            public:
+                Result();
+                int     numResults;
+                double  results[4];
+        };
 
         Solver(double a = 0.0,
                double b = 0.0,