public function concat(Converter $converter)
{
if ($converter instanceof self) {
$offset = $this->offset + $converter->getOffset();
return $offset == 0.0 ? Converter::IDENTITY() : new self($offset);
}
return parent::concat($converter);
}
public function concat(Converter $converter)
{
if ($converter instanceof self) {
$factor = $this->factor * $converter->getFactor();
return $factor == 1.0 ? Converter::IDENTITY() : new self($factor);
}
return parent::concat($converter);
}
public function concat(Converter $converter)
{
if (!$converter instanceof self) {
return parent::concat($converter);
}
$dividend = $this->dividend * $converter->getDividend();
$divisor = $this->divisor * $converter->getDivisor();
$gcd = $this->gcd($dividend, $divisor);
$dividend = $dividend / $gcd;
$divisor = $divisor / $gcd;
if ($dividend == 1 && $divisor == 1) {
return Converter::IDENTITY();
}
return new self($dividend, $divisor);
}
