<?php

/**
* This file is part of FPDI
*
* @package setasign\Fpdi
* @copyright Copyright (c) 2024 Setasign GmbH & Co. KG (https://www.setasign.com)
* @license http://opensource.org/licenses/mit-license The MIT License
*/

namespace setasign\Fpdi\Math;

/**
* A simple 2D-Matrix class
*/
class Matrix
{
/**
* @var float
*/
protected $a;

/**
* @var float
*/
protected $b;

/**
* @var float
*/
protected $c;

/**
* @var float
*/
protected $d;

/**
* @var float
*/
protected $e;

/**
* @var float
*/
protected $f;

/**
* @param int|float $a
* @param int|float $b
* @param int|float $c
* @param int|float $d
* @param int|float $e
* @param int|float $f
*/
public function __construct($a = 1, $b = 0, $c = 0, $d = 1, $e = 0, $f = 0)
{
$this->a = (float)$a;
$this->b = (float)$b;
$this->c = (float)$c;
$this->d = (float)$d;
$this->e = (float)$e;
$this->f = (float)$f;
}

/**
* @return float[]
*/
public function getValues()
{
return [$this->a, $this->b, $this->c, $this->d, $this->e, $this->f];
}

/**
* @param Matrix $by
* @return Matrix
*/
public function multiply(self $by)
{
$a =
$this->a * $by->a
+ $this->b * $by->c
//+ 0 * $by->e
;

$b =
$this->a * $by->b
+ $this->b * $by->d
//+ 0 * $by->f
;

$c =
$this->c * $by->a
+ $this->d * $by->c
//+ 0 * $by->e
;

$d =
$this->c * $by->b
+ $this->d * $by->d
//+ 0 * $by->f
;

$e =
$this->e * $by->a
+ $this->f * $by->c
+ /*1 * */$by->e;

$f =
$this->e * $by->b
+ $this->f * $by->d
+ /*1 * */$by->f;

return new self($a, $b, $c, $d, $e, $f);
}
}