#ifndef VIEW_H
#define VIEW_H

#include <set>
#include <map>

using namespace std;

#include "util.h"

struct visibility_state {
  unsigned int generation;
  enum { UNKNOWN, OCCLUDED, PARTIAL, FULL } visibility;

  visibility_state () : generation(0), visibility(UNKNOWN) { };
};

struct view {
  sector orig;
  point p;
  vec3 d, u;
  GLfloat fov;
  GLfloat near, far;
  int w, h;

  GLfloat gamma;

  // only to be used by friends TODO

  GLfloat nextfar;

  matrix projection;

  struct {
    plane l, r, t, b, n, f;
  } frustum;

  enum mode { DEPTH, LIGHTED } mode;
  light *l;
  set<const entity *> drawn;

  unsigned int generation;
  map<octant *, visibility_state> vismap;
  vector<octant *> vislist; // octants partially or fully visible in frustum
  vector<octant *> farlist; // octants possibly visible
  vector<octant *> occlist; // octants currently occluded

  void reset_projection ();

  // public
  
  void begin ();
  void pass (enum mode m);
  void end ();

  bool may_draw (const entity *e);

  view ();
  ~view ();
};

#endif