/
index.ts
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/
index.ts
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/*
* Copyright 2019 Google LLC. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// [START maps_geometry_headings]
// This example requires the Geometry library. Include the libraries=geometry
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=geometry">
let marker1: google.maps.Marker, marker2: google.maps.Marker;
let poly: google.maps.Polyline, geodesicPoly: google.maps.Polyline;
function initMap(): void {
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 4,
center: { lat: 34, lng: -40.605 },
}
);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(
document.getElementById("info") as HTMLElement
);
marker1 = new google.maps.Marker({
map,
draggable: true,
position: { lat: 40.714, lng: -74.006 },
});
marker2 = new google.maps.Marker({
map,
draggable: true,
position: { lat: 48.857, lng: 2.352 },
});
const bounds = new google.maps.LatLngBounds(
marker1.getPosition() as google.maps.LatLng,
marker2.getPosition() as google.maps.LatLng
);
map.fitBounds(bounds);
google.maps.event.addListener(marker1, "position_changed", update);
google.maps.event.addListener(marker2, "position_changed", update);
poly = new google.maps.Polyline({
strokeColor: "#FF0000",
strokeOpacity: 1.0,
strokeWeight: 3,
map: map,
});
geodesicPoly = new google.maps.Polyline({
strokeColor: "#CC0099",
strokeOpacity: 1.0,
strokeWeight: 3,
geodesic: true,
map: map,
});
update();
}
function update() {
const path = [
marker1.getPosition() as google.maps.LatLng,
marker2.getPosition() as google.maps.LatLng,
];
poly.setPath(path);
geodesicPoly.setPath(path);
const heading = google.maps.geometry.spherical.computeHeading(
path[0],
path[1]
);
(document.getElementById("heading") as HTMLInputElement).value = String(
heading
);
(document.getElementById("origin") as HTMLInputElement).value = String(
path[0]
);
(document.getElementById("destination") as HTMLInputElement).value = String(
path[1]
);
}
// [END maps_geometry_headings]
export { initMap };