Added presentations from EVI 2017

EVI - 2017/EVI 21/EVIray/light.hpp

@@ -0,0 +1,54 @@
+#pragma once
+#ifndef LIGHT_HPP
+#define LIGHT_HPP
+
+#include <glm/glm.hpp>
+
+#include "figure.hpp"
+#include "material.hpp"
+#include "ray.hpp"
+
+using glm::vec3;
+
+class Light {
+public:
+  typedef enum LIGHT_TYPE { INFINITESIMAL = 0, AREA } ltype_t;
+
+  vec3 m_position;
+  vec3 m_diffuse;
+  vec3 m_specular;
+
+  Light(): m_position(vec3(0.0f)), m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)) { }
+
+  Light(ltype_t _t): m_position(vec3(0.0f)), m_diffuse(vec3(1.0f)), m_specular(vec3(1.0f)), m_type(_t) { }
+
+  Light(vec3 _p, vec3 _d, vec3 _s, ltype_t _t): m_position(_p), m_diffuse(_d), m_specular(_s), m_type(_t) { }
+  
+  virtual ~Light() { }
+
+  virtual ltype_t light_type() {
+    return m_type;
+  }
+  
+  virtual vec3 direction(vec3 point) const = 0;
+  virtual float distance(vec3 point) const = 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 m_type;
+};
+
+class InfinitesimalLight: public Light {
+public:
+  InfinitesimalLight(): Light(INFINITESIMAL) { }
+  
+  InfinitesimalLight(vec3 _p, vec3 _d, vec3 _s): Light(_p, _d, _s, INFINITESIMAL) { }
+  
+  virtual vec3 direction(vec3 point) const = 0;
+  virtual float distance(vec3 point) const = 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;
+};
+
+#endif