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#ifndef MON_LOS_H
/*
* File: mon-los.cc
* Summary: Monster line-of-sight.
*/
#define MON_LOS_H
#define _monster_los_LSIZE (2 * LOS_RADIUS + 1)
// This class can be used to fill the entire surroundings (los_range)
// of a monster or other position with seen/unseen values, so as to be able
// to compare several positions within this range.
class monster_los
{
public:
monster_los();
virtual ~monster_los();
// public methods
void set_monster(monsters *mon);
void set_los_centre(int x, int y);
void set_los_centre(const coord_def& p) { this->set_los_centre(p.x, p.y); }
void set_los_range(int r);
void fill_los_field(void);
bool in_sight(int x, int y);
bool in_sight(const coord_def& p) { return this->in_sight(p.x, p.y); }
protected:
// protected methods
coord_def pos_to_index(coord_def &p);
coord_def index_to_pos(coord_def &i);
void set_los_value(int x, int y, bool blocked, bool override = false);
int get_los_value(int x, int y);
bool is_blocked(int x, int y);
bool is_unknown(int x, int y);
void check_los_beam(int dx, int dy);
// The (fixed) size of the array.
static const int LSIZE;
static const int L_VISIBLE;
static const int L_UNKNOWN;
static const int L_BLOCKED;
// The centre of our los field.
int gridx, gridy;
// Habitat checks etc. should be done for this monster.
// Usually the monster whose LOS we're trying to calculate
// (if mon->x == gridx, mon->y == gridy).
// Else, any monster trying to move around within this los field.
monsters *mons;
// Range may never be greater than LOS_RADIUS!
int range;
// The array to store the LOS values.
int los_field[_monster_los_LSIZE][_monster_los_LSIZE];
};
#endif
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