mcsee

struct Point {
   float x;
   float y;
}

mcsee

struct Point {
   float angle;
   float distance;
}

mcsee

<?

final class Point {
    private $x;
    private $y;
}

mcsee

<?

final class Point {
    private $angle;
    private $distance;
}

mcsee

<?

final class Point {
    private $x;
    private $y;

    public function x() {
        return $this->x;
    }

mcsee

<?

final class Point {
    private $angle;
    private $distance;

    public function x() {
        return $this->distance * cos($this->angle);
    }

mcsee

<?

final class Polygon {
    public $vertices;
}

mcsee

<?

final class Polygon {
    private $vertices;
    
    public function getVertices(): Collection {
        return $this->vertices;
    }

    public function setVertices(Collection $newVertices) {

mcsee

<?

final class Polygon {

  private $vertices;

  private function __construct(Collection $newVertices) {
    if (count($newVertices < 3)) {
       throw new 
         Exception('Cannot create a polygon with less than 3 vertices');

mcsee

<?

$triangle = 
  new Polygon([new Point(1, 1), new Point(2, 2), new Point(3, 3)]);
$triangle->setVertices([new Point(1, 1)]);