Separated BRDF from light source.

directional_light.hpp

@@ -6,22 +6,14 @@
 
 class DirectionalLight: public Light {
 public:
-  DirectionalLight() {
-    m_position = vec3(0.0f);
-    m_diffuse = vec3(1.0f);
-    m_specular = vec3(1.0f);
-  }
+  DirectionalLight(): Light() { }
 
-  DirectionalLight(vec3 _p, vec3 _d, vec3 _s) {
-    m_position = _p;
-    m_diffuse = _d;
-    m_specular = _s;
-  }
+  DirectionalLight(BRDF * _brdf, vec3 _p, vec3 _d, vec3 _s): Light(_brdf, _p, _d, _s) { }
 
   virtual vec3 direction(vec3 point);
   virtual float distance(vec3 point);
-  virtual vec3 diffuse(vec3 normal, Ray & r, float t, Material & m) const;
-  virtual vec3 specular(vec3 normal, Ray & r, float t, Material & m) const;
+  virtual vec3 diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const;
+  virtual vec3 specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const;
 };
 
 #endif