устранить анимированный круг в полилинии Openlayers - PullRequest
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устранить анимированный круг в полилинии Openlayers

0 голосов
/ 03 июня 2019

Добрый день, я делаю ломаную линию, в которой у меня проходит анимированный круг, но при выполнении другого запроса ломаная линия удаляется, а анимированный круг - нет.Как я могу сделать, чтобы очистить круг, так как я продолжаю кружить, пока он не достигнет конца ломаной линии, а не раньше.Это часть кода, и я использую этот пример, только я не использую кнопку stopAnimations

Ссылка: ejemplo openlayers 

          var polyline = new ol.geom.LineString(reslocationsIda);   
       reslocationsIda.map(function(l) {
              return l.reverse();
        });

        var route = new ol.geom.LineString(reslocationsIda);

        var routeCoords = route.getCoordinates();
        var routeLength = routeCoords.length;

        var routeFeature = new ol.Feature({
          type: 'route',

          geometry: route
        });
        var geoMarker = new ol.Feature({
          type: 'geoMarker',

          geometry: new ol.geom.Point(routeCoords[0])
        }); 

        var styles = {
                'route': new ol.style.Style({
            stroke: new ol.style.Stroke({
              width: 5,
              //Color Verde
              //color: [102, 153, 0, 0.8]
              //color: '#86CE18'
              color: '#10C1FF'
            })
          }),   
          'geoMarker': new ol.style.Style({
                image: new ol.style.Circle({
                  radius: 7,
                  snapToPixel: false,
                  fill: new ol.style.Fill({
                    color: 'white'
                  }),
                  stroke: new ol.style.Stroke({
                    color: 'black',
                    width: 2
                  })
                })
              })
            };

        if (routeLength > 1) {
        var animating = false;
        var speed, now;

        stopAnimation(true);
        var vectorLayerSeguimiento = new ol.layer.Vector({
          source: new ol.source.Vector({
            features: [routeFeature, geoMarker]
          }),
          style: function(feature) {
            if (animating && feature.get('type') === 
            'geoMarker') {
              return null;
            }
            return styles[feature.get('type')];
          }
        });
        map.getView().fit(

             vectorLayerSeguimiento.getSource().getExtent(), 
           map.getSize(),
            {padding: [30, 5, 5, 5]});
        var center = map.getView().getCenter();

        var moveFeature = function(event) {
          var vectorContext = event.vectorContext;
          var frameState = event.frameState;

          if (animating) {
            var elapsedTime = frameState.time - now;
            var index = Math.round(speed * elapsedTime / 1000);
             if (index >= routeLength) {
              stopAnimation(true);
              return;
            }   
            var currentPoint = new 
                ol.geom.Point(routeCoords[index]);
            var feature = new ol.Feature(currentPoint);
            vectorContext.drawFeature(feature, 
               styles.geoMarker);
          }
          map.render();
        };

            stopAnimation(false);
            animating = true;
            now = new Date().getTime();          
            speed = 15;

            geoMarker.setStyle(null);

            map.getView().setCenter(center);
            map.on('postcompose', moveFeature);
            map.render();
        /**
         * @param {boolean} ended end of animation.
         */
        function stopAnimation(ended) {
          animating = false;
       //             //startButton.textContent = 'Start 
   Animation';

      //              // if animation cancelled set the marker at 
    the 
               beginning
    //            var coord = ended ? routeCoords[routeLength - 
    1] : 
               routeCoords[0];
   //             /** @type {ol.geom.Point} */
  //              (geoMarker.getGeometry())
  //              .setCoordinates(coord);
   //             //remove listener
  //              map.un('postcompose', moveFeature);
        }

        }

модификация: 

	 
	     	 //function startAnimation() {
	             if (animating) {
// 	            	 animating = false;
	               stopAnimation(true);
	               map.un('postcompose', moveFeature);
	             } else {
	            	
	            	 stopAnimation(false);
	               animating = true;
	               animatingVuelta = true;
	 	     	    nowVuelta = new Date().getTime();     	 
	 	     	    speedVuelta = 15;
		     
	 	     	    geoMarkerVuelta.setStyle(null);

	 	      
	 	     	    map.getView().setCenter(center);
	 	     
	 	     	    map.on('postcompose', moveFeature);
	 	     	    
	 	     	    map.render();
	             }
	    //       }

	            
	           /**
	            * @param {boolean} ended end of animation.
	            */
	          function stopAnimation() {
	             animating = false;
	           //  startButton.textContent = 'Start Animation';

// 	             // if animation cancelled set the marker at the beginning
 	             var coord = routeCoordsVuelta[routeLength - 1];
 	             /** @type {module:ol/geom/Point~Point} */ (geoMarkerVuelta.getGeometry())
 	              // .setCoordinates(coord);
// 	             //remove listener
 	             map.un('postcompose', moveFeature);
 	           }

1 Ответ

0 голосов
/ 04 июня 2019

Я установил тайм-аут, чтобы остановить анимацию через 20 секунд, и маркер исчезает.Он также исчезнет, ​​если достигнет конца маршрута. 

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  ].join('');

  var route = /** @type {ol.geom.LineString} */ (new ol.format.Polyline({
    factor: 1e6
  }).readGeometry(polyline, {
    dataProjection: 'EPSG:4326',
    featureProjection: 'EPSG:3857'
  }));

  var routeCoords = route.getCoordinates();
  var routeLength = routeCoords.length;

  var routeFeature = new ol.Feature({
    type: 'route',
    geometry: route
  });

  var styles = {
    'route': new ol.style.Style({
      stroke: new ol.style.Stroke({
        width: 6, color: [237, 212, 0, 0.8]
      })
    }),
    'icon': new ol.style.Style({
      image: new ol.style.Icon({
        anchor: [0.5, 1],
        src: 'https://openlayers.org/en/v4.6.5/examples/data/icon.png'
      })
    }),
    'geoMarker': new ol.style.Style({
      image: new ol.style.Circle({
        radius: 7,
        snapToPixel: false,
        fill: new ol.style.Fill({color: 'black'}),
        stroke: new ol.style.Stroke({
          color: 'white', width: 2
        })
      })
    })
  };

  var animating = false;
  var speed, now;

  var vectorLayer = new ol.layer.Vector({
    source: new ol.source.Vector({
      features: [routeFeature]
    }),
    style: function(feature) {
      return styles[feature.get('type')];
    }
  });

  var center = [-5639523.95, -3501274.52];
  var map = new ol.Map({
    target: document.getElementById('map'),
    loadTilesWhileAnimating: true,
    view: new ol.View({
      center: center,
      zoom: 9,
      minZoom: 2,
      maxZoom: 19
    }),
    layers: [
      new ol.layer.Tile({
        source: new ol.source.OSM()
      }),
      vectorLayer
    ]
  });

  var moveFeature = function(event) {
    var vectorContext = event.vectorContext;
    var frameState = event.frameState;

    if (animating) {
      var elapsedTime = frameState.time - now;
      // here the trick to increase speed is to jump some indexes
      // on lineString coordinates
      var index = Math.round(speed * elapsedTime / 1000);

      if (index >= routeLength) {
        stopAnimation(true);
        return;
      }

      var currentPoint = new ol.geom.Point(routeCoords[index]);
      var feature = new ol.Feature(currentPoint);
      vectorContext.drawFeature(feature, styles.geoMarker);
    }
    // tell OpenLayers to continue the postcompose animation
    map.render();
  };

      stopAnimation(false);
      animating = true;
      now = new Date().getTime();
      speed = 15;
      map.getView().setCenter(center);
      map.on('postcompose', moveFeature);
      map.render();


  /**
   * @param {boolean} ended end of animation.
   */
  function stopAnimation(ended) {
    animating = false;
    //remove listener
    map.un('postcompose', moveFeature);
  }

  setTimeout(stopAnimation, 20000);
<script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js"></script>
<link href="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/css/ol.css" rel="stylesheet"/>
<div id="map" class="map"></div>
...