Whoo got unit tests that are failing...

2025-06-07 15:26:51 -07:00
parent 5e9039efad
commit 44053555ec
15 changed files with 2472 additions and 114 deletions
@@ -0,0 +1,52 @@
+import HSL from "./hsl"
+
+export default class RGB {
+    red: number
+    green: number
+    blue: number
+
+    constructor(red: number, green: number, blue: number) {
+        this.red = red
+        this.green = green
+        this.blue = blue
+    }
+
+    toHex(): number {
+        return this.red << 16 + this.green << 8 + this.blue
+    }
+
+    // https://en.wikipedia.org/wiki/HSL_and_HSV
+    public static fromHsl(hsl: HSL): RGB {
+        let red = 0,
+            green = 0,
+            blue = 0
+        const saturationValue = hsl.saturation / 100,
+            lightnessValue = hsl.lightness / 100,
+            chroma = 1 - Math.abs(2 * hsl.lightness - 1) * saturationValue,
+            range = hsl.hue / 60,
+            intermediate = chroma * (1 - Math.abs(range % 2 - 1)),
+            match = lightnessValue - chroma / 2
+
+        if (range >= 0 && range < 1) {
+            red = chroma
+            green = intermediate
+        } else if (range >= 1 && range < 2) {
+            red = intermediate
+            green = chroma
+        } else if (range >= 2 && range < 3) {
+            green = chroma
+            blue = intermediate
+        } else if (range >= 3 && range < 4) {
+            green = intermediate
+            blue = chroma
+        } else if (range >= 4 && range < 5) {
+            red = intermediate
+            blue = chroma
+        } else if (range >= 5 && range < 6) {
+            red = chroma
+            blue = intermediate
+        }
+
+        return new RGB((red + match) * 255, (green + match) * 255, (blue + match) * 255)
+    }
+}