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<?php
declare(strict_types = 1);
namespace BaconQrCode\Renderer\Image;
final class TransformationMatrix
{
/**
* @var float[]
*/
private $values;
public function __construct()
{
$this->values = [1, 0, 0, 1, 0, 0];
}
public function multiply(self $other) : self
{
$matrix = new self();
$matrix->values[0] = $this->values[0] * $other->values[0] + $this->values[2] * $other->values[1];
$matrix->values[1] = $this->values[1] * $other->values[0] + $this->values[3] * $other->values[1];
$matrix->values[2] = $this->values[0] * $other->values[2] + $this->values[2] * $other->values[3];
$matrix->values[3] = $this->values[1] * $other->values[2] + $this->values[3] * $other->values[3];
$matrix->values[4] = $this->values[0] * $other->values[4] + $this->values[2] * $other->values[5]
+ $this->values[4];
$matrix->values[5] = $this->values[1] * $other->values[4] + $this->values[3] * $other->values[5]
+ $this->values[5];
return $matrix;
}
public static function scale(float $size) : self
{
$matrix = new self();
$matrix->values = [$size, 0, 0, $size, 0, 0];
return $matrix;
}
public static function translate(float $x, float $y) : self
{
$matrix = new self();
$matrix->values = [1, 0, 0, 1, $x, $y];
return $matrix;
}
public static function rotate(int $degrees) : self
{
$matrix = new self();
$rad = deg2rad($degrees);
$matrix->values = [cos($rad), sin($rad), -sin($rad), cos($rad), 0, 0];
return $matrix;
}
/**
* Applies this matrix onto a point and returns the resulting viewport point.
*
* @return float[]
*/
public function apply(float $x, float $y) : array
{
return [
$x * $this->values[0] + $y * $this->values[2] + $this->values[4],
$x * $this->values[1] + $y * $this->values[3] + $this->values[5],
];
}
}