Collision.h

#ifndef _COLLISION_H_
#define _COLLISION_H_

// GL
#include "GLInclude.h"

// Engine
#include "Material.h"

////////////////////////////////////////////////////////////////////////////////
/// @brief Information of a collision
////////////////////////////////////////////////////////////////////////////////
struct Collision {
  //////////////////////////////////////////////////////////////////////////////
  /// @brief Type of a collision, i.e., hit or miss.
  //////////////////////////////////////////////////////////////////////////////
  enum class Type {
    kMiss = 0, ///< No collision
    kHit       ///< Collision
  };
  
  // Constructors
  Collision() : m_type(Type::kMiss), m_t(0){};

  Collision(const glm::vec3& _x, const glm::vec3& _n, const Material*  _m, float _t) : 
    m_type(Type::kHit), m_x{_x}, m_normal{_n}, m_material{_m}, m_t(_t){};

  Type                m_type; ///< Type of collision object
  glm::vec3              m_x; ///< Point of collision
  glm::vec3         m_normal; ///< Normal at collision
  const Material* m_material; ///< Material of surface
  float m_t;                    // parameter t on the ray
};

#endif