swf2ass/src/ass/positionTag.php

35 lines
1 KiB
PHP

<?php
namespace swf2ass\ass;
use swf2ass\Constants;
use swf2ass\MatrixTransform;
use swf2ass\StyleRecord;
use swf2ass\Vector2;
class positionTag implements ASSPositioningTag {
private Vector2 $position;
public function __construct(Vector2 $position) {
$this->position = $position;
}
public function transitionMatrixTransform(MatrixTransform $transform): ?positionTag {
$translation = $transform->getTranslation()->divide(Constants::TWIP_SIZE);
return $this->position->equals($translation) ? self::fromMatrixTransform($transform) : null;
}
public function encode(): string {
return "\\pos({$this->position->x},{$this->position->y})";
}
public function equals(ASSTag $tag): bool {
return $tag instanceof $this and $this->position->equals($tag->position);
}
public static function fromMatrixTransform(MatrixTransform $transform): ?positionTag {
$translation = $transform->getTranslation()->divide(Constants::TWIP_SIZE);
return new positionTag($translation);
}
}