使用Google Maps API旋转SVG符号以匹配飞机航向

像读取坐标一样从DOM中读取标题，并使用它来设置图标的rotation属性。

// read the value for the heading from the DOM
var gettrueHeadingEl = document.getElementById('trueHeading');
getTrueHeading = parseFloat(gettrueHeadingEl.innerHTML);
// set the rotation property of the icon
marker.setPosition(new google.maps.LatLng(getLat, getLong));
var newIcon = marker.getIcon()
newIcon.rotation = getTrueHeading;
marker.setIcon(newIcon);

概念验证小提琴

代码片段：

function initMap() {
  var getLatEl = document.getElementById('latitude');
  getLat = parseFloat(getLatEl.innerHTML);
  var getLongEl = document.getElementById('longitude');
  getLong = parseFloat(getLongEl.innerHTML);
  var gettrueHeadingEl = document.getElementById('trueHeading');
  getTrueHeading = parseFloat(gettrueHeadingEl.innerHTML);
  if (isNaN(getLat) == true && isNaN(getLong) == true) {
    // Show default location      
    var usersLocation = {
      lat: 33.949484,
      lng: -118.430566
    };
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 3,
      center: usersLocation,
      mapTypeId: google.maps.MapTypeId.TERRAIN
    });
    var image = 'assets/images/icons/aircraft_marker_map_none_16x16.png';
  } else if (isNaN(getLat) == false && isNaN(getLong) == false) {
    // Show flight sim location
    var usersLocation = {
      lat: getLat,
      lng: getLong
    };
    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 8,
      center: usersLocation,
      mapTypeId: google.maps.MapTypeId.TERRAIN
    });
    var image = 'assets/images/icons/aircraft_marker_map_16x16.png';
  }
  var planeSymbol = {
    path: 'M362.985,430.724l-10.248,51.234l62.332,57.969l-3.293,26.145 l-71.345-23.599l-2.001,13.069l-2.057-13.529l-71.278,22.928l-5.762-23.984l64.097-59.271l-8.913-51.359l0.858-114.43 l-21.945-11.338l-189.358,88.76l-1.18-32.262l213.344-180.08l0.875-107.436l7.973-32.005l7.642-12.054l7.377-3.958l9.238,3.65 l6.367,14.925l7.369,30.363v106.375l211.592,182.082l-1.496,32.247l-188.479-90.61l-21.616,10.087l-0.094,115.684',
    scale: 0.0333,
    strokeOpacity: 1,
    color: 'black',
    strokeWeight: 1,
    rotation: getTrueHeading,
    anchor: new google.maps.Point(400, 400)
  };

  var marker = new google.maps.Marker({
    id: "player",
    position: usersLocation,
    map: map,
    title: 'Username',
    icon: planeSymbol
  });
  //
  var polyline = new google.maps.Polyline({
      map: map,
      path: []
    })
    // Move players aircraft
  setInterval(function() {
    var getLatEl = document.getElementById('latitude');
    getLat = parseFloat(getLatEl.innerHTML);
    var getLongEl = document.getElementById('longitude');
    getLong = parseFloat(getLongEl.innerHTML);
    var gettrueHeadingEl = document.getElementById('trueHeading');
    getTrueHeading = parseFloat(gettrueHeadingEl.innerHTML);
    var planeSymbol = {
      path: 'M362.985,430.724l-10.248,51.234l62.332,57.969l-3.293,26.145 l-71.345-23.599l-2.001,13.069l-2.057-13.529l-71.278,22.928l-5.762-23.984l64.097-59.271l-8.913-51.359l0.858-114.43 l-21.945-11.338l-189.358,88.76l-1.18-32.262l213.344-180.08l0.875-107.436l7.973-32.005l7.642-12.054l7.377-3.958l9.238,3.65 l6.367,14.925l7.369,30.363v106.375l211.592,182.082l-1.496,32.247l-188.479-90.61l-21.616,10.087l-0.094,115.684',
      scale: 0.0333,
      strokeOpacity: 1,
      color: 'black',
      strokeWeight: 1,
      rotation: getTrueHeading,
      anchor: new google.maps.Point(400, 400)
    };
    if (marker && marker.setPosition) {
      marker.setPosition(new google.maps.LatLng(getLat, getLong));
      var newIcon = marker.getIcon()
      newIcon.rotation = getTrueHeading;
      marker.setIcon(newIcon);
      polyline.getPath().push(marker.getPosition());
    } else {
      marker = new google.maps.Marker({
        position: usersLocation,
        map: map,
        title: 'Username',
        icon: planeSymbol
      });
    }
    map.panTo(new google.maps.LatLng(getLat, getLong));
  }, 3000);

  marker.setMap(map);
  //  moveAircraft(map, marker);
}
var angle = 0;
function simulateMovement() {
  angle += 1;
  var newPt = google.maps.geometry.spherical.computeOffset(new google.maps.LatLng(42, -72), 100000, angle);
  document.getElementById('latitude').innerHTML = newPt.lat();
  document.getElementById('longitude').innerHTML = newPt.lng();
  var heading = angle + 90;
  document.getElementById('trueHeading').innerHTML = heading;
}
setInterval(simulateMovement, 1000);
google.maps.event.addDomListener(window, "load", initMap);

html,
body,
#map {
  height: 100%;
  width: 100%;
  margin: 0px;
  padding: 0px
}

<script src="https://maps.googleapis.com/maps/api/js?libraries=geometry&key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="latitude">42</div>
<div id="longitude">-72</div>
<div id="trueHeading">90</div>
<div id="map"></div>