Intial Commit

nodered/rootfs/data/node_modules/fraction.js/examples/approx.js

@@ -0,0 +1,53 @@
+/**
+ * @license Fraction.js v2.7.0 01/06/2015
+ * http://www.xarg.org/2014/03/rational-numbers-in-javascript/
+ *
+ * Copyright (c) 2015, Robert Eisele (robert@xarg.org)
+ * Dual licensed under the MIT or GPL Version 2 licenses.
+ **/
+
+// Another rational approximation, not using Farey Sequences but Binary Search using the mediant
+function approximate(p, precision) {
+
+  var num1 = Math.floor(p);
+  var den1 = 1;
+
+  var num2 = num1 + 1;
+  var den2 = 1;
+
+  if (p !== num1) {
+
+    while (den1 <= precision && den2 <= precision) {
+
+      var m = (num1 + num2) / (den1 + den2);
+
+      if (p === m) {
+
+        if (den1 + den2 <= precision) {
+          den1 += den2;
+          num1 += num2;
+          den2 = precision + 1;
+        } else if (den1 > den2) {
+          den2 = precision + 1;
+        } else {
+          den1 = precision + 1;
+        }
+        break;
+
+      } else if (p < m) {
+        num2 += num1;
+        den2 += den1;
+      } else {
+        num1 += num2;
+        den1 += den2;
+      }
+    }
+  }
+
+  if (den1 > precision) {
+    den1 = den2;
+    num1 = num2;
+  }
+  return new Fraction(num1, den1);
+}
+