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<?php
namespace App\World;
use App\Collision\Collision;
use Exception;
class Boid
{
protected $radius;
private $initial_x;
private $initial_y;
protected $x;
protected $y;
public function __construct(int $radius, int $initial_x, int $initial_y, ?string $name = null)
{
$this->radius($radius);
$this->initial_x = $initial_x;
$this->initial_y = $initial_y;
$this->position($initial_x, $initial_y);
if (!$name) {
$name = $this->generateName();
}
$this->name($name);
}
public function radius(int $radius = null): int|Boid
{
if ($radius) {
$this->radius = $radius;
return $this;
}
return $this->radius;
}
public function position(int $x = null, int $y = null): array|Boid
{
if ($x !== null xor $y !== null) {
throw new Exception('Either 0 or 2 arguments are requried for Boid::position()');
}
if ($x !== null) {
$this->x = $x;
$this->y = $y;
return $this;
}
return [$this->x, $this->y];
}
public function name(string $name = null): string|Boid
{
if ($name) {
$this->name = $name;
return $this;
}
return $this->name;
}
public function isCollisionWithWorld(int $w_w, int $w_h, int $w_x, int $w_y): bool
{
return Collision::circleWorld($this->radius, $this->x, $this->y, $w_w, $w_h, $w_x, $w_y);
}
protected function generateName()
{
return uniqid('boid');
}
}
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