1 files changed, 61 insertions, 0 deletions
diff --git a/util/qt3d/assetviewer/qml/ColorUtils.js b/util/qt3d/assetviewer/qml/ColorUtils.js
new file mode 100644
index 000000000..5addf3948
--- /dev/null
+++ b/util/qt3d/assetviewer/qml/ColorUtils.js
@@ -0,0 +1,61 @@
+.pragma library
+
+function rgbToHsv(r, g, b) {
+    r = r/255; g = g/255; b = b/255;
+    var max = Math.max(r, g, b), min = Math.min(r, g, b);
+    var h, s, v = max;
+
+    var d = max - min;
+    s = max == 0 ? 0 : d / max;
+
+    if (max == min){
+        h = 0; // achromatic
+    } else {
+        switch (max) {
+            case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+            case g: h = (b - r) / d + 2; break;
+            case b: h = (r - g) / d + 4; break;
+        }
+        h /= 6;
+    }
+
+    return new Array(h, s, v);
+}
+
+function hsvToRgb(h, s, v) {
+    var r, g, b;
+
+    var i = Math.floor(h * 6);
+    var f = h * 6 - i;
+    var p = v * (1 - s);
+    var q = v * (1 - f * s);
+    var t = v * (1 - (1 - f) * s);
+
+    switch (i % 6){
+        case 0: r = v; g = t; b = p; break;
+        case 1: r = q; g = v; b = p; break;
+        case 2: r = p; g = v; b = t; break;
+        case 3: r = p; g = q; b = v; break;
+        case 4: r = t; g = p; b = v; break;
+        case 5: r = v; g = p; b = q; break;
+    }
+
+    return new Array(r * 255, g * 255, b * 255);
+}
+
+function hsvToHsl(h, s, v) {
+    var ss, l;
+
+    l = ((2.0 - s)*v);
+
+    ss = s*v*((l <= 1) ? l : 2 - l);
+
+    l /= 2;
+
+    return new Array(h, ss, l);
+}
+
+function hsvToColor(h, s, v, a) {
+    var hsl = hsvToHsl(h,s,v);
+    return Qt.hsla(hsl[0], hsl[1], hsl[2], a);
+}