Added groundwork for area lights. Added irony-mode CDB.

light.hpp

@@ -11,6 +11,8 @@ using glm::vec3;
 
 class Light {
 public:
+  typedef enum LIGHT_TYPE { INFINITESIMAL = 0, AREA } ltype_t;
+
   vec3 m_position;
   vec3 m_diffuse;
   vec3 m_specular;
@@ -21,6 +23,45 @@ public:
   
   virtual ~Light() { }
 
+  virtual ltype_t light_type() {
+    return type;
+  }
+  
+  virtual vec3 direction(vec3 point) = 0;
+  virtual float distance(vec3 point) = 0;
+  virtual vec3 diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const = 0;
+  virtual vec3 specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const = 0;
+
+protected:
+  ltype_t type;
+};
+
+class InfinitesimalLight: public Light {
+public:
+  InfinitesimalLight(): Light() {
+    type = INFINITESIMAL;
+  }
+  
+  InfinitesimalLight(vec3 _p, vec3 _d, vec3 _s): Light(_p, _d, _s) {
+    type = INFINITESIMAL;
+  }
+  
+  virtual vec3 direction(vec3 point) = 0;
+  virtual float distance(vec3 point) = 0;
+  virtual vec3 diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const = 0;
+  virtual vec3 specular(vec3 normal, Ray & r, vec3 i_pos, Material & m) const = 0;
+};
+
+class AreaLight: public Light {
+public:
+  AreaLight(): Light() {
+    type = AREA;
+  }
+
+  AreaLight(vec3 _p, vec3 _d, vec3 _s): Light(_p, _d, _s) {
+    type = AREA;
+  }
+  
   virtual vec3 direction(vec3 point) = 0;
   virtual float distance(vec3 point) = 0;
   virtual vec3 diffuse(vec3 normal, Ray & r, vec3 i_pos, Material & m) const = 0;