Started scene reader. Added libjson-spirit dependency.

camera.hpp

@@ -20,14 +20,10 @@ public:
   vec3 m_look;
   vec3 m_up;
 
-  Camera(int h = 480, int w = 640, float fov = 90.0f, vec3 _e = vec3(0.0f), vec3 _l = vec3(0.0f, 0.0f, -1.0f), vec3 _u = vec3(0.0f, 1.0f, 0.0f)):
+  Camera(vec3 _e = vec3(0.0f), vec3 _l = vec3(0.0f, 0.0f, -1.0f), vec3 _u = vec3(0.0f, 1.0f, 0.0f)):
     m_eye(_e),
     m_look(_l),
     m_up(normalize(_u)),
-    m_h(h),
-    m_w(w),
-    m_fov(fov),
-    m_a_ratio(static_cast<float>(w) / static_cast<float>(h)),
     m_inv_view_matrix(inverse(lookAt(_e, _l, normalize(_u))))
   { }
 
@@ -36,14 +32,9 @@ public:
   void pitch(float angle);
   void yaw(float angle);
   void roll(float angle);
-  vec2 sample_pixel(int i, int j) const;
   void view_to_world(Ray & r) const;
 
 private:
-  int m_h;
-  int m_w;
-  float m_fov;
-  float m_a_ratio;
   mat4 m_inv_view_matrix;
 };