#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;
  float fov;
  int w, h;

  void draw ();

  // only to be used by friends TODO

  matrix projection;

  void transform (const matrix &m);

  struct {
    plane l, r, t, b, n, f;
  } frustum;
  enum { DEPTH, LIGHTED } mode;
  light *l;
  set<entity_base *> drawn;

  unsigned int generation;
  map<octant *, visibility_state> vismap;
  vector<octant *> vislist; // octants partially or fully visible
  vector<octant *> checklist; // octants possibly visible

  bool may_draw (entity_base *e);

  view ();
  ~view ();
};

#endif