/**
* @param MovableInterface $fish
* @param Position $current
*
* @return Position
*/
protected function moveFish(MovableInterface $fish, Position $current)
{
$mov = $fish->getMovement();
$next = $current->calculateNewPoint($mov);
$destination = $this->worldMap->get($next);
if ($destination === null) {
// Destinazione vuota: mi sposto
$this->worldMap->put($fish, $next);
$this->worldMap->put(null, $current);
$current = $next;
} else {
// Destinazione occupata: se posso mangio
if ($fish instanceof PredatorInterface and $destination instanceof FoodInterface) {
$fish->eat($destination);
$this->worldMap->put($fish, $next);
$this->worldMap->put(null, $current);
$current = $next;
unset($destination);
}
}
return $current;
}
/**
* @param Position $pos
* Il metodo fixPosition si occupa di far
* si che il nostro mondo sia Toroidale.
*/
public function fixPosition(Position $pos)
{
if ($pos->getX() < 0) {
$pos->setX($this->w + $pos->getX());
} elseif ($pos->getX() >= $this->w) {
$pos->setX($pos->getX() - $this->w);
}
if ($pos->getY() < 0) {
$pos->setY($this->h + $pos->getY());
} elseif ($pos->getY() >= $this->h) {
$pos->setY($pos->getY() - $this->h);
}
}
/**
* Restituisce una posizione libera (se disponibile) nei dintorni
*
* @param Position $position
* @return null|Position Null
*
* @internal param FishInterface $fish
*/
public function getNearFreePosition(Position $position)
{
$pos = new Position($position->getX(), $position->getY());
$x = $pos->getX() - 1;
$y = $pos->getY() - 1;
for ($i = 0; $i < 3; $i++) {
$pos->setX($x + $i);
for ($j = 0; $j < 3; $j++) {
$pos->setY($y + $j);
if ($this->isFreePosition($pos) == true) {
return new Position($pos->getX(), $pos->getY());
}
}
}
return null;
}
