App\Image\Sections\Avatar::calculateHelmStandardDeviation()

Complexity

Conditions	4
Paths	6

Size

Total Lines	41
Code Lines	32

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
    protected function calculateHelmStandardDeviation($head_part): void
    {
        // Check for helm image
        $all_red = [];
        $all_green = [];
        $all_blue = [];
        $all_alpha = [];
        $x = 0;
        while ($x < 8) {
            $y = 0;
            while ($y < 8) {
                $color = \imagecolorat($head_part, $x, $y);
                $colors = \imagecolorsforindex($head_part, $color);
                $all_red[] = $colors['red'];
                $all_green[] = $colors['green'];
                $all_blue[] = $colors['blue'];
                $all_alpha[] = $colors['alpha'];
                ++$y;
            }
            ++$x;
        }
        // mean value for each color
        $mean_red = \array_sum($all_red) / 64;
        $mean_green = \array_sum($all_green) / 64;
        $mean_blue = \array_sum($all_blue) / 64;
        $this->meanAlpha = \array_sum($all_alpha) / 64;
        // Arrays deviation
        $devs_red = [];
        $devs_green = [];
        $devs_blue = [];
        $i = 0;
        while ($i < 64) {
            $devs_red[] = ($all_red[$i] - $mean_red) ** 2;
            $devs_green[] = ($all_green[$i] - $mean_green) ** 2;
            $devs_blue[] = ($all_blue[$i] - $mean_blue) ** 2;
            ++$i;
        }
        // stddev for each color
        $this->redStdDev = \sqrt(\array_sum($devs_red) / 64);
        $this->greenStdDev = \sqrt(\array_sum($devs_green) / 64);
        $this->blueStdDev = \sqrt(\array_sum($devs_blue) / 64);
    }