Artack\Color\Transition\RGBTransition::interpolate()

Complexity

Conditions	1
Paths	1

Size

Total Lines	15
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function interpolate(Color $startColor, Color $endColor, float $value, float $max): Color
    {
        /* @var RGB $startColor */
        Assert::isInstanceOf($startColor, RGB::class, sprintf('startColor needs to be an instance of [%s]', RGB::class));

        /* @var RGB $endColor */
        Assert::isInstanceOf($endColor, RGB::class, sprintf('endColor needs to be an instance of [%s]', RGB::class));

        $step = $value / $max;

        $red = $startColor->getRed() + ($endColor->getRed() - $startColor->getRed()) * $step;
        $green = $startColor->getGreen() + ($endColor->getGreen() - $startColor->getGreen()) * $step;
        $blue = $startColor->getBlue() + ($endColor->getBlue() - $startColor->getBlue()) * $step;

        return new RGB((int) round($red), (int) round($green), (int) round($blue));
    }