I tried to look for exactly what I mentioned in the question, but I couldn't find such code example which can find/generate the directions from current location to specified destination using only latitude and longitude (of both entities) as core parameters.

I don't have any other parameter of any entity(either source or destination) that could assist in generating directions.

I have done this code so far and also previously:

```
<script>
        function initMap() {
            var directionsService = new google.maps.DirectionsService;
            var directionsDisplay = new google.maps.DirectionsRenderer;
            var map = new google.maps.Map(document.getElementById('map'), {
                zoom: 7,
                center: {lat: 41.85, lng: -87.65}
            });
            directionsDisplay.setMap(map);
            var onChangeHandler = function() {
                calculateAndDisplayRoute(directionsService, directionsDisplay);
            };
            document.getElementById('start').addEventListener('change', onChangeHandler);
            document.getElementById('end').addEventListener('change', onChangeHandler);
        }
        function calculateAndDisplayRoute(directionsService, directionsDisplay) {
            directionsService.route({
                origin: document.getElementById('start').value,
                destination: document.getElementById('end').value,
                travelMode: 'DRIVING'
            }, function(response, status) {
                if (status === 'OK') {
                    directionsDisplay.setDirections(response);
                } else {
                    window.alert('Directions request failed due to ' + status);
                }
            });
        }
        </script>
        <script async defer src="https://maps.googleapis.com/maps/api/js?key=[API_Key]&callback=initMap">
        </script>

```

But this code requires the destination and source location's name like "st louis, mo" or "oklahoma city, ok", and I have only latitude and longitude of current location and destination.

Could anyone guide on this ?