<?php

namespace App\Engine\Map;

/** A piece of a line side made by the BSP builder (seg_t). */
final class Seg
{
    public float $angle;
    public ?Sector $backSector;
    public Sector $frontSector;
    public Side $sidedef;

    public function __construct(
        public float $x1, public float $y1, public float $x2, public float $y2,
        public Line $line, public int $side, public float $offset,
    ) {
        $this->angle = atan2($y2 - $y1, $x2 - $x1);
        $this->sidedef = $side === 0 ? $line->front : $line->back;
        $this->frontSector = $this->sidedef->sector;
        $this->backSector = $side === 0 ? $line->backSector : $line->frontSector;
    }
}