TorstenHettstedt/PHP-Packages-Colors
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Die Werte werden annähernd ermittelt. Es gibt noch Rundungsfehler.

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Torstem_JetBrain
2021-03-04 13:55:16 +01:00
parent f965d7d9d7
commit c9624a84ba
1 changed files with 47 additions and 1 deletions
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src/Transformer/Utilities/HueSaturationValueToRedGreenBlue.php
+47 -1
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@@ -9,6 +9,9 @@ use TorstenHettstedt\Colors\ColorModels\RedGreenBlue;
class HueSaturationValueToRedGreenBlue
{
/** @var int : Größe des Intervals in 1/100 Grad */
protected const INTERVAL = 60 * 100;
// Daten für HSV
/** @var float : Definition des Farbton als Anteil eines Vollkreises '$Hue * π' */
protected float $hue;
@@ -59,7 +62,50 @@ class HueSaturationValueToRedGreenBlue
protected function splitColor(): void
{
// Anteil am Vollkreis in 1/100 Grad
$percent_grad = intval($this->hue * 360 * 100);
// ID des zu nutzenden Interval
$interval_id = intdiv($percent_grad , self::INTERVAL);
// Rest-Anteil am Vollkreis des aktuellen Intervals als Wert '[0,1]'
$remainder = (($percent_grad % self::INTERVAL) / self::INTERVAL);
$help_values = [
$this->value,
$this->value * ( 1 - $this->saturation),
$this->value * ( 1 - $this->saturation * $remainder),
$this->value * ( 1 - $this->saturation * (1 - $remainder)),
];
switch ($interval_id) {
case 1:
$this->red = $help_values[2];
$this->green = $help_values[0];
$this->blu = $help_values[1];
break;
case 2:
$this->red = $help_values[1];
$this->green = $help_values[0];
$this->blu = $help_values[3];
break;
case 3:
$this->red = $help_values[1];
$this->green = $help_values[2];
$this->blu = $help_values[0];
break;
case 4:
$this->red = $help_values[3];
$this->green = $help_values[1];
$this->blu = $help_values[0];
break;
case 5:
$this->red = $help_values[0];
$this->green = $help_values[1];
$this->blu = $help_values[2];
break;
default:
$this->red = $help_values[0];
$this->green = $help_values[3];
$this->blu = $help_values[1];
break;
}
}
}