Implement a skewed bell random for the added time in Random Hour

js/lib/generalFunc.js

@@ -6,9 +6,24 @@ const randomInRange = (min, max) => {
     return Math.floor(Math.random() * (max - min)) + min;
 };
 
-const randomInRangeNoRounding = (min, max) => {
-    return Math.random() * (max - min) + min;
-};
+const randomBellSkew = (min, max, skew) => {
+    let u = 0, v = 0;
+    while(u === 0) u = Math.random() //Converting [0,1) to (0,1)
+    while(v === 0) v = Math.random()
+    let num = Math.sqrt( -2.0 * Math.log( u ) ) * Math.cos( 2.0 * Math.PI * v )
+
+    num = num / 10.0 + 0.5 // Translate to 0 -> 1
+    if (num > 1 || num < 0) 
+      num = randomBellSkew(min, max, skew) // resample between 0 and 1 if out of range
+
+    else{
+        num = Math.pow(num, skew) // Skew
+        num *= max - min // Stretch to fill range
+        num += min // offset to min
+    }
+
+    return num
+}
 
 const logMessage = (module, message) => {
     console.log(`[${module}]: ${message}`);