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