Route inside marker radius Google Maps - google-maps

Question

I need your help
I need to know if in some point my route (A->B) is inside my Marker(C) radius
Is there a way to get some true or false of this event?
The idea of this its make something like Uber Pool algorythm or something close to that
JS:
function initMap() {
var pointA = new google.maps.LatLng(51.7519, -1.2578),
pointB = new google.maps.LatLng(50.8429, -0.1313),
pointC = new google.maps.LatLng(51.2029, -0.1403),
myOptions = {
zoom: 7,
center: pointA
},
map = new google.maps.Map(document.getElementById('map-canvas'), myOptions),
// Instantiate a directions service.
directionsService = new google.maps.DirectionsService,
directionsDisplay = new google.maps.DirectionsRenderer({
map: map
}),
markerA = new google.maps.Marker({
position: pointA,
title: "point A",
label: "A",
map: map
}),
markerB = new google.maps.Marker({
position: pointB,
title: "point B",
label: "B",
map: map
}),
markerC = new google.maps.Marker({
position: pointC,
title: "point C",
label: "C",
map: map
});
var circle = new google.maps.Circle({
map: map,
radius: 1000, // 10 miles in metres
fillColor: '#AA0000'
});
circle.bindTo('center', markerC, 'position');
// get route from A to B
calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB) {
directionsService.route({
origin: pointA,
destination: pointB,
avoidTolls: true,
avoidHighways: false,
travelMode: google.maps.TravelMode.DRIVING
}, function (response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
}
initMap();
HTML
<div id="map-canvas"></div>
CSS
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map-canvas {
height: 100%;
width: 100%;
}
Here´s the fiddle
Tks a lot

Answer 1

Process through all the points in the returned directions polyline, check if any of them are in the circle.
// convert the directions response to polylines
renderDirectionsPolylines(response);
// check to see if any of the points from the route are in the circle
for (var i = 0; i < polylines.length; i++) {
for (var j = 0; j < polylines[i].getPath().getLength(); j++) {
if (google.maps.geometry.spherical.computeDistanceBetween(polylines[i].getPath().getAt(j), circle.getCenter()) < circle.getRadius()) {
console.log("route intersects circle at:" + polylines[i].getPath().getAt(j).toUrlValue(6));
}
}
}
proof of concept fiddle
code snippet:
var map;
function initMap() {
var pointA = new google.maps.LatLng(51.7519, -1.2578),
pointB = new google.maps.LatLng(50.8429, -0.1313),
pointC = new google.maps.LatLng(51.2029, -0.1403),
myOptions = {
zoom: 7,
center: pointA
},
map = new google.maps.Map(document.getElementById('map-canvas'), myOptions),
// Instantiate a directions service.
directionsService = new google.maps.DirectionsService,
directionsDisplay = new google.maps.DirectionsRenderer({
map: map,
preserveViewport: true
}),
markerA = new google.maps.Marker({
position: pointA,
title: "point A",
label: "A",
map: map
}),
markerB = new google.maps.Marker({
position: pointB,
title: "point B",
label: "B",
map: map
}),
markerC = new google.maps.Marker({
position: pointC,
title: "point C",
label: "C",
map: map
});
var circle = new google.maps.Circle({
map: map,
radius: 1000, // 10 miles in metres
fillColor: '#AA0000'
});
circle.bindTo('center', markerC, 'position');
// get route from A to B
calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB, circle);
}
function calculateAndDisplayRoute(directionsService, directionsDisplay, pointA, pointB, circle) {
directionsService.route({
origin: pointA,
destination: pointB,
avoidTolls: true,
avoidHighways: false,
travelMode: google.maps.TravelMode.DRIVING
}, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
renderDirectionsPolylines(response);
console.log("polylines=" + polylines.length);
for (var i = 0; i < polylines.length; i++) {
for (var j = 0; j < polylines[i].getPath().getLength(); j++) {
if (google.maps.geometry.spherical.computeDistanceBetween(polylines[i].getPath().getAt(j), circle.getCenter()) < circle.getRadius()) {
console.log("route intersects circle at:" + polylines[i].getPath().getAt(j).toUrlValue(6));
var mark = new google.maps.Marker({
map: circle.getMap(),
position: polylines[i].getPath().getAt(j),
icon: {
url: "https://maps.gstatic.com/intl/en_us/mapfiles/markers2/measle.png",
size: new google.maps.Size(7, 7),
anchor: new google.maps.Point(3.5, 3.5)
}
});
circle.getMap().fitBounds(circle.getBounds());
// document.getElementById('result').innerHTML += "route intersects circle at:"+polylines[i].getPath().getAt(j).toUrlValue(6)+"<br>";
}
}
}
} else {
window.alert('Directions request failed due to ' + status);
}
});
}
var polylineOptions = {
strokeColor: '#C83939',
strokeOpacity: 1,
strokeWeight: 4
};
var polylines = [];
function renderDirectionsPolylines(response) {
for (var i = 0; i < polylines.length; i++) {
polylines[i].setMap(null);
}
var legs = response.routes[0].legs;
for (i = 0; i < legs.length; i++) {
var steps = legs[i].steps;
for (j = 0; j < steps.length; j++) {
var nextSegment = steps[j].path;
var stepPolyline = new google.maps.Polyline(polylineOptions);
for (k = 0; k < nextSegment.length; k++) {
stepPolyline.getPath().push(nextSegment[k]);
}
polylines.push(stepPolyline);
stepPolyline.setMap(map);
// route click listeners, different one on each step
google.maps.event.addListener(stepPolyline, 'click', function(evt) {
infowindow.setContent("you clicked on the route<br>" + evt.latLng.toUrlValue(6));
infowindow.setPosition(evt.latLng);
infowindow.open(map);
})
}
}
}
initMap();
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
#map-canvas {
height: 100%;
width: 100%;
}
<script src="https://maps.googleapis.com/maps/api/js?libraries=geometry"></script>
<div id="result"></div>
<div id="map-canvas"></div>