Get location after travel x distance on a Google Maps route

Question

Just want to verify this. I have checked Google Maps API, couldn't seem to find this one.

Bascially if I use Google Maps to calculate a route from point A to point B. I wonder if there is an API that Google provides to calculate what's the location/coordinate if you travel x meters following the route from point A?

Or I have to break down the routes returned by Google and calculate them one by one. I assume it would be something like:

var travelledDistance   
var routeDistanceTotal  
for route x in routes  
var routeDistanceTotal = routeDistanceTotal + (route x end - route x start)   
if( routeDistanceTotal >= travelledDistance) {  
    final location = point end - routeDistanceTotal - travelled distance 
}    
else{  
    continue to next route  
}

Thanks!

Answer 1

Found it!

GetPointAtDistance from http://www.geocodezip.com/scripts/v3_epoly.js.

From latLng from polyLine Percentage and thanks to @geocodezip