/**
* \brief Returns whether this entity is an obstacle for another one.
* \param other Another entity.
* \return \c true if this entity is an obstacle for the other one.
*/
bool Enemy::is_obstacle_for(const MapEntity& other) const {
if (!is_enabled()) {
return false;
}
return !is_traversable() || other.is_enemy_obstacle(*this);
}
bool
is_safe_to_follow (struct anim *k0, struct anim *k1, enum dir dir)
{
/* not aware of enemy position */
if (! is_valid_pos (&k0->enemy_pos)) return false;
struct pos p0, p, p1, pke, pk;
survey (_m, pos, &k0->f, NULL, &p0, NULL);
survey ((k0->f.dir == LEFT) ? _mr : _ml,
pos, &k1->f, NULL, &p1, NULL);
pos2room (&p1, p0.room, &p1);
/* not reachable, to start with */
if (p0.room != p1.room) return false;
if (p0.floor > p1.floor) return false;
/* the character went down after the enemy */
if (p0.floor != k0->enemy_pos.floor) {
/* enum dir odir = (dir == LEFT) ? RIGHT : LEFT; */
/* if (is_on_back (k0, k1) && is_seeing (k0, k1, odir) */
/* && p0.floor == p1.floor) return true; */
if (is_anim_seeing (k0, k1, LEFT)
|| is_anim_seeing (k0, k1, RIGHT)) return true;
return false;
}
/* if falling the chasing is inevitable (necessary to prevent
leave_fight_logic from forgeting enemy based on the facing
direction of the is_in_range check) */
if (is_anim_fall (&k0->f)) return true;
if (dir == LEFT) {
if (! is_safe_at_left (&p0)) return false;
if (! is_safe_at_right (&k0->enemy_pos, &k0->f)) return false;
if (peqr (&k0->enemy_pos, &p0, +0, -1)) return true;
prel (&p0, &pk, +0, -1);
prel (&k0->enemy_pos, &pke, +0, +1);
if (is_collidable_at_right (&pk, &k0->f))
return false;
} else {
if (! is_safe_at_right (&p0, &k0->f)) return false;
if (! is_safe_at_left (&k0->enemy_pos)) return false;
if (peqr (&k0->enemy_pos, &p0, +0, +1)) return true;
prel (&p0, &pk, +0, +1);
prel (&k0->enemy_pos, &pke, +0, -1);
if (is_collidable_at_right (&p0, &k0->f))
return false;
}
/* enemy went down */
if (is_traversable (&k0->enemy_pos)) {
prel (&k0->enemy_pos, &pke, +1, +0);
if (is_traversable (&pke) || fg (&pke) == SPIKES_FLOOR)
return false;
int d = (dir == LEFT) ? -1 : +1;
if (peq (&pk, &k0->enemy_pos)) return true;
prel (&k0->enemy_pos, &pke, +0, -1 * d);
} else if (peq (&p0, &k0->enemy_pos)
&& ! (is_anim_seeing (k0, k1, LEFT)
|| is_anim_seeing (k0, k1, RIGHT)))
return false;
first_confg (&pk, &pke, dangerous_cs, &p);
if (is_valid_pos (&p)) return false;
first_confg (&pk, &pke, door_cs, &p);
if (! is_valid_pos (&p)) return true;
else return door_at_pos (&p)->action == OPEN_DOOR
|| ! is_collidable_at_right (&p, &k0->f);
}
