1 files changed, 30 insertions, 0 deletions
diff --git a/public/js/mp/dye.js b/public/js/mp/dye.js
new file mode 100644
index 0000000..d4c016b
--- /dev/null
+++ b/public/js/mp/dye.js
@@ -0,0 +1,30 @@
+"use strict";
+var mp = function(mp) {
+    mp.dye = {
+        getChannel: getChannel
+    };
+    var channel = [null, "R", "G", "Y", "B", "M", "C", "W"];
+    function getChannel(color) {
+        var r = color[0], g = color[1], b = color[2],
+            max = Math.max(r, g, b);
+
+        if (max == 0) {
+            // Black
+            return { channel: null, intensity: 0 };
+        }
+
+        var min = Math.min(r, g, b), intensity = r + g + b;
+
+        var idx;
+
+        if (min != max && (min != 0 || (intensity != max && intensity != 2 * max))) {
+            // Not pure
+            idx = 0;
+        } else {
+            idx = (r != 0) | ((g != 0) << 1) | ((b != 0) << 2);
+        }
+
+        return { channel: channel[idx], intensity: max };
+    }
+    return mp;
+}(mp || {});