Added presentations from EVI 2017

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

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+#pragma once
+#ifndef SCENE_HPP
+#define SCENE_HPP
+
+#include <string>
+#include <vector>
+#include <stdexcept>
+
+#include <json_spirit_value.h>
+
+#include "camera.hpp"
+#include "figure.hpp"
+#include "light.hpp"
+#include "material.hpp"
+#include "environment.hpp"
+
+using std::string;
+using std::vector;
+using std::runtime_error;
+using json_spirit::Value;
+
+class SceneError: public runtime_error {
+public:
+  explicit SceneError(const string & what_arg): runtime_error(what_arg) { }
+};
+
+class Scene {
+public:
+  typedef enum LIGHT_TYPE { DIRECTIONAL, POINT, SPOT, SPHERE, DISK, PLANE } light_type_t;
+
+  vector<Figure *> m_figures;
+  vector<Light *> m_lights;
+  Environment * m_env;
+  Camera * m_cam;
+
+  Scene(const char * file_name, int h = 480, int w = 640, float fov = 90.0f);
+  ~Scene();
+
+private:
+  void read_vector(Value & val, vec3 & vec);
+  void read_environment(Value & v);
+  void read_camera(Value & v);
+  Material * read_material(Value & v);
+  Figure * read_sphere(Value & v);
+  Figure * read_plane(Value & v);
+  Light * read_light(Value & v, light_type_t t);
+  Light * read_area_light(Value & v, light_type_t t);
+};
+
+#endif