Initial Commit

node_modules/color-space/ucs.js

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+/**
+ * https://en.wikipedia.org/wiki/CIE_1960_color_space
+ *
+ * Obsolete color space
+ *
+ * @module  color-space/ucs
+ */
+import xyz from './xyz.js';
+
+var ucs = {
+	name: 'ucs',
+	min: [0, 0, 0],
+	max: [100, 100, 100],
+	channel: ['U', 'V', 'W'],
+	alias: ['UCS', 'cie1960']
+};
+
+export default (ucs);
+
+/**
+ * UCS to XYZ
+ *
+ * @param {Array<number>} ucs XYZ values
+ *
+ * @return {Array<number>} UCS values
+ */
+ucs.xyz = function (ucs) {
+	var u = ucs[0],
+		v = ucs[1],
+		w = ucs[2];
+
+	return [
+		1.5 * u,
+		v,
+		1.5 * u - 3 * v + 2 * w
+	];
+};
+
+
+/**
+ * XYZ to UCS
+ *
+ * @param {Array<number>} xyz UCS values
+ *
+ * @return {Array<number>} XYZ values
+ */
+xyz.ucs = function (xyz) {
+	var x = xyz[0],
+		y = xyz[1],
+		z = xyz[2];
+
+	return [
+		x * 2 / 3,
+		y,
+		0.5 * (-x + 3 * y + z)
+	];
+};