下午好，我正在做一条折线，其中有一个穿过它的动画圆，但是在再次查询时，折线被删除了，但是动画圆却没有。 由于我一直盘旋直到到达折线的尽头而不是之前，所以该如何清洁圆。 这是代码的一部分，我使用的是此示例，只有我不使用stopAnimations按钮
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);
}
}
修改：
//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);
}
答案 0 :(得分：0)
我已设置超时时间，以在20秒后停止动画，并且标记消失。如果到达路线的尽头，它也会消失。
var polyline = [
'hldhx@lnau`BCG_EaC??cFjAwDjF??uBlKMd@}@z@??aC^yk@z_@se@b[wFdE??wFfE}N',
'fIoGxB_I\\gG}@eHoCyTmPqGaBaHOoD\\??yVrGotA|N??o[N_STiwAtEmHGeHcAkiA}^',
'aMyBiHOkFNoI`CcVvM??gG^gF_@iJwC??eCcA]OoL}DwFyCaCgCcCwDcGwHsSoX??wI_E',
'kUFmq@hBiOqBgTwS??iYse@gYq\\cp@ce@{vA}s@csJqaE}{@iRaqE{lBeRoIwd@_T{]_',
'Ngn@{PmhEwaA{SeF_u@kQuyAw]wQeEgtAsZ}LiCarAkVwI}D??_}RcjEinPspDwSqCgs@',
'sPua@_OkXaMeT_Nwk@ob@gV}TiYs[uTwXoNmT{Uyb@wNg]{Nqa@oDgNeJu_@_G}YsFw]k',
'DuZyDmm@i_@uyIJe~@jCg|@nGiv@zUi_BfNqaAvIow@dEed@dCcf@r@qz@Egs@{Acu@mC',
'um@yIey@gGig@cK_m@aSku@qRil@we@{mAeTej@}Tkz@cLgr@aHko@qOmcEaJw~C{w@ka',
'i@qBchBq@kmBS{kDnBscBnFu_Dbc@_~QHeU`IuyDrC_}@bByp@fCyoA?qMbD}{AIkeAgB',
'k_A_A{UsDke@gFej@qH{o@qGgb@qH{`@mMgm@uQus@kL{_@yOmd@ymBgwE}x@ouBwtA__',
'DuhEgaKuWct@gp@cnBii@mlBa_@}|Asj@qrCg^eaC}L{dAaJ_aAiOyjByH{nAuYu`GsAw',
'Xyn@ywMyOyqD{_@cfIcDe}@y@aeBJmwA`CkiAbFkhBlTgdDdPyiB`W}xDnSa}DbJyhCrX',
'itAhT}x@bE}Z_@qW_Kwv@qKaaAiBgXvIm}A~JovAxCqW~WanB`XewBbK{_A`K}fBvAmi@',
'xBycBeCauBoF}}@qJioAww@gjHaPopA_NurAyJku@uGmi@cDs[eRaiBkQstAsQkcByNma',
'CsK_uBcJgbEw@gkB_@ypEqDoqSm@eZcDwjBoGw`BoMegBaU_`Ce_@_uBqb@ytBwkFqiT_',
'fAqfEwe@mfCka@_eC_UmlB}MmaBeWkkDeHwqAoX}~DcBsZmLcxBqOwqE_DkyAuJmrJ\\o',
'~CfIewG|YibQxBssB?es@qGciA}RorAoVajA_nAodD{[y`AgPqp@mKwr@ms@umEaW{dAm',
'b@umAw|@ojBwzDaaJsmBwbEgdCsrFqhAihDquAi`Fux@}_Dui@_eB_u@guCuyAuiHukA_',
'lKszAu|OmaA{wKm}@clHs_A_rEahCssKo\\sgBsSglAqk@yvDcS_wAyTwpBmPc|BwZknF',
'oFscB_GsaDiZmyMyLgtHgQonHqT{hKaPg}Dqq@m~Hym@c`EuiBudIabB{hF{pWifx@snA',
'w`GkFyVqf@y~BkoAi}Lel@wtc@}`@oaXi_C}pZsi@eqGsSuqJ|Lqeb@e]kgPcaAu}SkDw',
'zGhn@gjYh\\qlNZovJieBqja@ed@siO{[ol\\kCmjMe\\isHorCmec@uLebB}EqiBaCg}',
'@m@qwHrT_vFps@kkI`uAszIrpHuzYxx@e{Crw@kpDhN{wBtQarDy@knFgP_yCu\\wyCwy',
'A{kHo~@omEoYmoDaEcPiuAosDagD}rO{{AsyEihCayFilLaiUqm@_bAumFo}DgqA_uByi',
'@swC~AkzDlhA}xEvcBa}Cxk@ql@`rAo|@~bBq{@``Bye@djDww@z_C_cAtn@ye@nfC_eC',
'|gGahH~s@w}@``Fi~FpnAooC|u@wlEaEedRlYkrPvKerBfYs}Arg@m}AtrCkzElw@gjBb',
'h@woBhR{gCwGkgCc[wtCuOapAcFoh@uBy[yBgr@c@iq@o@wvEv@sp@`FajBfCaq@fIipA',
'dy@ewJlUc`ExGuaBdEmbBpBssArAuqBBg}@s@g{AkB{bBif@_bYmC}r@kDgm@sPq_BuJ_',
's@{X_{AsK_d@eM{d@wVgx@oWcu@??aDmOkNia@wFoSmDyMyCkPiBePwAob@XcQ|@oNdCo',
'SfFwXhEmOnLi\\lbAulB`X_d@|k@au@bc@oc@bqC}{BhwDgcD`l@ed@??bL{G|a@eTje@',
'oS~]cLr~Bgh@|b@}Jv}EieAlv@sPluD{z@nzA_]`|KchCtd@sPvb@wSb{@ko@f`RooQ~e',
'[upZbuIolI|gFafFzu@iq@nMmJ|OeJn^{Qjh@yQhc@uJ~j@iGdd@kAp~BkBxO{@|QsAfY',
'gEtYiGd]}Jpd@wRhVoNzNeK`j@ce@vgK}cJnSoSzQkVvUm^rSgc@`Uql@xIq\\vIgg@~k',
'Dyq[nIir@jNoq@xNwc@fYik@tk@su@neB}uBhqEesFjoGeyHtCoD|D}Ed|@ctAbIuOzqB',
'_}D~NgY`\\um@v[gm@v{Cw`G`w@o{AdjAwzBh{C}`Gpp@ypAxn@}mAfz@{bBbNia@??jI',
'ab@`CuOlC}YnAcV`@_^m@aeB}@yk@YuTuBg^uCkZiGk\\yGeY}Lu_@oOsZiTe[uWi[sl@',
'mo@soAauAsrBgzBqgAglAyd@ig@asAcyAklA}qAwHkGi{@s~@goAmsAyDeEirB_{B}IsJ',
'uEeFymAssAkdAmhAyTcVkFeEoKiH}l@kp@wg@sj@ku@ey@uh@kj@}EsFmG}Jk^_r@_f@m',
'~@ym@yjA??a@cFd@kBrCgDbAUnAcBhAyAdk@et@??kF}D??OL'
].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>