map-view-follow animation
index.html
<!DOCTYPE html>
<html>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Animation - map-view-follow animation</title>
  <style type="text/css">
    html,body{margin:0px;height:100%;width:100%}
    .container{width:100%;height:100%}
    .pane{background:#34495e;line-height:28px;color:#fff;z-index:10;position:absolute;top:20px;right:20px}
    .pane a{display:block;color:#fff;text-align:left;padding:0 10px;min-width:28px;min-height:28px;float:left}
  </style>
  <link rel="stylesheet" href="https://unpkg.com/maptalks/dist/maptalks.css">
  <script type="text/javascript" src="https://unpkg.com/maptalks/dist/maptalks.min.js"></script>
  <body>
    <script type="text/javascript" src="https://unpkg.com/turf[email protected]/turf.min.js"></script>
    <div id="map" class="container"></div>
    <div class="pane"><a href="javascript:start();">start</a></div>

    <script>
      var center = new maptalks.Coordinate(118.846825, 32.046534);
      var map = new maptalks.Map('map', {
        center: center,
        zoom: 18,
        seamlessZoom: true,
        pitch: 65,
        // centerCross: true,
        baseLayer: new maptalks.TileLayer('base', {
          urlTemplate:
            'https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}',
          subdomains: ['a', 'b', 'c', 'd'],
          attribution: '&copy; <a href="https://www.esri.com/en-us/home">esri</a>'
        })
      });

      var layer = new maptalks.VectorLayer('layer', {
        hitDetect: true,
        geometryEvents: true
      }).addTo(map);

      var coordiantes = [
        [120.543189862389, 31.35322014824814],
        [120.54391551057267, 31.35371261270089],
        [120.54506885867931, 31.354451304544426],
        [120.54587139673674, 31.35501763102789],
        [120.54707760663155, 31.355752208849054],
        [120.54825017720657, 31.356441639795918],
        [120.54965341740296, 31.357237762100084],
        [120.55118160364418, 31.35791076744991],
        [120.55261854668379, 31.358306813092582],
        [120.55456885954129, 31.35892438695859],
        [120.55632947631534, 31.359855802165697],
        [120.55739651678448, 31.360529047629626],
        [120.5583272131937, 31.361237721856668],
        [120.55895558146995, 31.36169835723942],
        [120.55950095770982, 31.361779347842656],
        [120.55989220588185, 31.36172872872382],
        [120.56026567004596, 31.361506004277174],
        [120.56086439830915, 31.36083276580959],
        [120.56180695072362, 31.359830492091845],
        [120.56218041488785, 31.359309103054073],
        [120.56241753499216, 31.3585295451185],
        [120.56237028513135, 31.357949524158727],
        [120.5621203930416, 31.357165719008975],
        [120.56187530656894, 31.35647218963217],
        [120.56165424818187, 31.355721202348974],
        [120.56164944256477, 31.355355965928624],
        [120.56182244478077, 31.35513436111691],
        [120.56208675372181, 31.354957897652554],
        [120.56249523117617, 31.354933274817228],
        [120.56287968054517, 31.355052285128153],
        [120.56336024225618, 31.355191814266362],
        [120.56383599835021, 31.355323135619102],
        [120.56411823174483, 31.35531370115811],
        [120.56451108319175, 31.355280752400773],
        [120.56493901066062, 31.355160938640353],
        [120.56587203284698, 31.35481347787183],
        [120.56675594860246, 31.354516937062584],
        [120.56843258245613, 31.353986755709315],
        [120.5700145110502, 31.35345956676693],
        [120.57178585016345, 31.352935370285905],
        [120.57333270273546, 31.352519006427343],
        [120.57448319625848, 31.35221646750327],
        [120.57551793890877, 31.351985818362692],
        [120.57763653064012, 31.351494563762202],
        [120.57919390601887, 31.351198012486947],
        [120.5809512147232, 31.350868509973196],
        [120.58295054797964, 31.35057195672377],
        [120.58502354088239, 31.350356281045975],
        [120.58627224726706, 31.350224478999365],
        [120.5874823700276, 31.350122631836854],
        [120.59152584231651, 31.349856304834162],
        [120.59430413211135, 31.349902525810847],
        [120.59755148381964, 31.349917932798093],
        [120.60048312077856, 31.3501798511941],
        [120.60473173926357, 31.350534210215955],
        [120.60818656066442, 31.350811533736504],
        [120.61173158627935, 31.350981008818707],
        [120.6170265736481, 31.35100411903349],
        [120.62201486668891, 31.350826940574763],
        [120.62405348192806, 31.35069598236899],
        [120.62905561628952, 31.350032419603707],
        [120.62990839532642, 31.34993531589643],
        [120.63024516959456, 31.34983613848371],
        [120.63079647383688, 31.349739949917847],
        [120.63147819413666, 31.349577947900315],
        [120.63169753023317, 31.349400757874122],
        [120.63182201828783, 31.349142566095594],
        [120.63175088225648, 31.34888943621283],
        [120.6315908261862, 31.348656556118982],
        [120.63120550601684, 31.34852999060874],
        [120.63087946587348, 31.34858061683329],
        [120.63070755379783, 31.348707182275376],
        [120.6305178577145, 31.348975500449427],
        [120.63038744165715, 31.349532384782577],
        [120.63034594563885, 31.350043702948568],
        [120.63042300967277, 31.350641081047087],
        [120.63066012977697, 31.351096705859646],
        [120.63095060190471, 31.351552328464862],
        [120.63118772200892, 31.351921887401176],
        [120.63168515539405, 31.35219880544568],
        [120.63248920420028, 31.352608017684105],
        [120.63305772355818, 31.35296867784163],
        [120.63374806849276, 31.353377886729987],
        [120.63403232817177, 31.35341950109344],
        [120.63426785761999, 31.35342643681892],
        [120.63443841342746, 31.353502729765154],
        [120.63498256767002, 31.35356515122058],
        [120.63552415947902, 31.353532455415092],
        [120.63596182529568, 31.35347320158391],
        [120.63661298663283, 31.35320883788225],
        [120.63707733938963, 31.3529216833642],
        [120.6373708957301, 31.352620853881007],
        [120.63744561916224, 31.35236104582563],
        [120.63738157050614, 31.352114911216376],
        [120.63717341237384, 31.351914356613946],
        [120.63692255513729, 31.35184598562907],
        [120.63660764924475, 31.351841427561652],
        [120.63636746678435, 31.35201463396865],
        [120.63623403208419, 31.352383836034647],
        [120.63633544245636, 31.352689224302623],
        [120.63650090148462, 31.3529216833642],
        [120.63683181954116, 31.353199721879236],
        [120.63742426961016, 31.35367375286191],
        [120.63899989912761, 31.35481832702638],
        [120.64019378977923, 31.355581242410636],
        [120.64162320987919, 31.3566631845234],
        [120.64244421131548, 31.357355036087455],
        [120.64279521271169, 31.357767168817503],
        [120.64328515216039, 31.35848527456139],
        [120.64376046655104, 31.359652965234176],
        [120.64456769613616, 31.363272225986208],
        [120.64494602107004, 31.36555252186676],
        [120.64581813599784, 31.36849036625327],
        [120.6465155185075, 31.370868523138512]
      ];
      var markerFile =
        'data:image/svg+xml;base64,<svg class="icon" width="128" height="128" style="width: 1em;height: 1em;vertical-align: middle;fill: currentColor;overflow: hidden;" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M201.736576 724.0704a422.4 422.4 0 0 1 0-599.808c166.656-165.6832 436.8128-165.6832 603.4432 0a422.4 422.4 0 0 1 0 599.8336L503.458176 1024 201.762176 724.0704z" fill="#1576E8" /><path d="M503.483776 426.6752m-362.6752 0a362.6752 362.6752 0 1 0 725.3504 0 362.6752 362.6752 0 1 0-725.3504 0Z" fill="#FFFFFF" /><path d="M399.726976 431.488c-28.2112 0-46.3872-22.528-40.4224-50.0992l24.4224-99.7376c5.9648-27.5712 33.92-50.1248 62.1312-50.1248h226.4576c28.2112 0 54.7328 22.8096 58.9312 50.688l16.8448 98.56c4.224 27.904-15.4112 50.7136-43.6224 50.7136H399.726976z" fill="#2177DC" /><path d="M399.726976 422.528c-10.88 0-20.1216-4.0448-26.0352-11.392-5.9392-7.3216-7.936-17.2288-5.632-27.8528-0.0256 0.256 24.3712-99.5072 24.3712-99.5072 5.12-23.552 29.568-43.264 53.4272-43.264h226.4576c23.6288 0 46.5408 19.712 50.0736 43.0592l16.8704 98.7392c1.6128 10.7008-1.1008 20.864-7.6288 28.4416-6.528 7.6032-16.1792 11.776-27.136 11.776H399.701376z m304.768 17.92c16.2816 0 30.7712-6.3744 40.7552-17.9968 9.984-11.5968 14.1568-26.88 11.6992-43.008l-16.8448-98.7136c-4.8384-32-35.2512-58.1632-67.7888-58.1632h-226.4576c-32.256 0-64.0768 25.6512-70.912 57.1648l-24.3712 99.5328c-3.5328 16.256-0.256 31.488 9.1392 43.1616 9.3696 11.6224 23.5776 18.048 39.9872 18.048H704.520576z" fill="#1558A6" /><path d="M268.398976 555.7504s-27.392-0.0768-39.0144-0.1536c-11.5712-0.0768-20.992-10.5728-20.8896-23.296l0.384-42.2144 0.2048-26.112c0-24.7808 20.3264-40.448 46.208-46.2848l93.1328-19.456h407.3216c12.032 4.2752 50.688 5.0688 50.688 53.4784l0.6912 84.224a22.784 22.784 0 0 1-22.9376 22.9888l-23.3984-0.1536" fill="#2177DC" /><path d="M431.189376 366.4128c-20.608 0-21.0944-16.9216-16.7168-37.5808l5.0432-27.5456c5.8112-27.4944 23.3728-37.5808 45.44-37.5808h191.8464c27.3152 0 37.5296 17.1008 40.6272 38.016l4.608 26.6496c3.072 20.9152 1.4336 38.0416-19.2 38.0416h-251.648z" fill="#AADBF7" /><path d="M431.214976 357.4272c-4.0192 0-6.7072-0.7936-8.0128-2.4064-1.8432-2.2784-3.328-8.3456 0.0512-24.3456l5.0688-27.776c4.352-20.5568 16-30.208 36.608-30.208h191.8976c18.8416 0 28.6208 9.344 31.7184 30.336l4.6336 26.88c1.8944 12.8 1.3056 21.248-1.7664 24.832-0.5888 0.64-2.3296 2.688-8.576 2.688h-251.648z m251.6224 17.9456c9.6 0 17.0496-2.9952 22.1696-8.9088 8.8576-10.2912 7.808-26.4448 5.888-39.3984l-4.6336-26.88c-5.5296-37.5296-29.952-45.44-49.4336-45.44h-191.872c-28.8768 0-48.128 15.872-54.2208 44.6976l-5.0944 27.776c-2.6624 12.672-4.736 28.8 3.6352 39.1424 4.864 5.9904 12.2368 9.0368 21.9392 9.0368l251.6224-0.0256z" fill="#444461" /><path d="M241.570176 519.5008l0.2048-25.5744c0-24.2176 19.8656-39.5008 45.184-45.2352l82.4832-17.2288 406.912-1.792c4.096 1.4848 11.4944 2.5344 19.3024 5.3504-8.8064-28.3136-37.0432-29.44-46.8992-32.9216H350.472576l-91.0848 18.9952c-25.344 5.7344-45.184 21.0432-45.184 45.2608l-0.2048 25.5488-0.384 40.32c-0.0768 12.4672 9.1136 22.7072 20.4288 22.784l7.168 0.0512 0.3584-35.584z" fill="#C9E2FF" opacity=".44" /><path d="M355.387776 398.2592h397.6704v161.3312H355.387776v-161.3312z" fill="#F0F0FF" /><path d="M753.058176 550.6304H355.387776l8.96 8.96v-161.3312l-8.96 8.96h397.6704l-8.96-8.96v161.3312l8.96-8.96z m0-161.3568H346.427776v179.3024h415.616v-179.3024h-8.9856z" fill="#1558A6" /><path d="M268.424576 546.7648l-38.9632-0.128c-6.5536-0.0768-12.032-6.6048-12.0064-14.2848l0.4096-42.2144 0.1792-26.112c0-25.9072 27.4432-34.9184 39.2192-37.5808l93.0048-19.4048a9.0112 9.0112 0 0 1-1.8432 0.2048h407.3216a9.0624 9.0624 0 0 1-2.9952-0.512c2.2272 0.768 4.7872 1.3824 7.7312 2.048 15.616 3.712 36.9664 8.7296 36.9664 42.9312l0.6912 84.2752a13.7216 13.7216 0 0 1-8.5504 12.9536 13.824 13.824 0 0 1-5.376 1.024l-23.3728-0.1536a8.96 8.96 0 0 0-8.3712 12.3392 8.9856 8.9856 0 0 0 8.2432 5.6064l23.3984 0.1536a31.5392 31.5392 0 0 0 22.7072-9.344 31.5392 31.5392 0 0 0 9.2928-22.7072l-0.6912-84.1984c0-48.3584-35.584-56.7296-50.7904-60.3136-2.3552-0.5632-4.5568-1.0752-5.888-1.536a8.9344 8.9344 0 0 0-2.9952-0.512h-407.296a9.0112 9.0112 0 0 0-1.8432 0.1792l-93.1584 19.4304c-33.4592 7.5776-53.3504 28.16-53.3504 55.04l-0.1792 26.0864-0.4096 42.2144c-0.1024 17.664 13.2608 32.2048 29.824 32.3072l39.04 0.1536a9.0112 9.0112 0 0 0 8.576-12.4416 8.9856 8.9856 0 0 0-8.5248-5.504z" fill="#1558A6" /><path d="M403.029376 566.272h195.6864a8.96 8.96 0 1 0 0-17.9712h-195.6864a8.96 8.96 0 0 0 0 17.9456z" fill="#6E6E96" /><path d="M819.720576 547.2256c0 7.04-5.76 12.8-12.8 12.8H205.243776a12.8512 12.8512 0 0 1-12.8-12.8v-25.2416c0-7.04 5.76-12.8 12.8-12.8H806.920576c7.0656 0 12.8 5.76 12.8 12.8v25.2416z" fill="#F0F0FF" /><path d="M810.760576 547.2256c0 2.0736-1.792 3.84-3.84 3.84H205.243776a3.8912 3.8912 0 0 1-3.84-3.84v-25.2416c0-2.048 1.7664-3.84 3.84-3.84h601.6256c2.0992 0 3.84 1.792 3.84 3.84v25.2416z m17.92-25.2416a21.8112 21.8112 0 0 0-21.76-21.76H205.243776a21.8112 21.8112 0 0 0-21.7856 21.76v25.2416c0 12.032 9.7792 21.7856 21.7856 21.7856h601.6256c12.032 0 21.7856-9.7536 21.7856-21.76v-25.2672z" fill="#1558A6" /><path d="M192.443776 536.0896h623.5392v17.9456H192.443776v-17.92z" fill="#6E6E96" opacity=".15" /><path d="M268.091776 556.544a68.096 68.096 0 1 0 136.1408 0 68.096 68.096 0 0 0-136.1408 0z" fill="#F0F0FF" /><path d="M336.162176 503.8336c29.056 0 52.7104 23.6544 52.7104 52.7104 0 14.08-5.4784 27.3152-15.4368 37.248a52.3264 52.3264 0 0 1-37.2736 15.4368 52.7616 52.7616 0 0 1-52.7104-52.6848c0-29.056 23.6544-52.7104 52.7104-52.7104z m-83.456 52.7104A83.5584 83.5584 0 0 0 336.136576 640a83.5584 83.5584 0 0 0 83.456-83.456 83.5584 83.5584 0 0 0-83.456-83.456 83.5584 83.5584 0 0 0-83.456 83.456z" fill="#3D3D58" /><path d="M333.371776 530.688c26.4192 0 48.5888 18.1504 54.7584 42.6496a56.448 56.448 0 1 0-109.5168 0 56.4992 56.4992 0 0 1 54.7584-42.6496z" fill="#6E6E96" opacity=".15" /><path d="M316.270976 557.4912a18.5088 18.5088 0 1 0 37.0176 0 18.5088 18.5088 0 0 0-37.0176 0z" fill="#434360" /><path d="M611.310976 556.544a68.096 68.096 0 1 0 136.1664 0 68.096 68.096 0 0 0-136.192 0z" fill="#F0F0FF" /><path d="M679.381376 503.8336c29.0816 0 52.736 23.6544 52.736 52.7104 0 14.08-5.504 27.3152-15.4624 37.248a52.3264 52.3264 0 0 1-37.248 15.4368 52.7616 52.7616 0 0 1-52.736-52.6848c0-29.056 23.6544-52.7104 52.736-52.7104z m-83.456 52.7104a83.5584 83.5584 0 0 0 83.456 83.456 83.5584 83.5584 0 0 0 83.4816-83.456 83.5584 83.5584 0 0 0-83.456-83.456 83.5584 83.5584 0 0 0-83.456 83.456z" fill="#3D3D58" /><path d="M676.590976 530.688c26.4192 0 48.5888 18.1504 54.7584 42.6496a56.4992 56.4992 0 0 0-54.784-70.2976 56.4736 56.4736 0 0 0-54.7328 70.2976 56.4992 56.4992 0 0 1 54.7584-42.6496z" fill="#6E6E96" opacity=".15" /><path d="M659.490176 557.4912a18.5088 18.5088 0 1 0 36.992 0 18.5088 18.5088 0 0 0-36.992 0z" fill="#434360" /><path d="M208.674176 463.872h40.6016v45.312H208.648576v-45.312z" fill="#FFFF00" /><path d="M249.275776 518.144H208.699776a8.96 8.96 0 0 1-8.9856-8.96v-45.312a8.96 8.96 0 0 1 8.96-8.96h40.6016a8.96 8.96 0 0 1 8.96 8.96v45.312a8.96 8.96 0 0 1-8.96 8.96z m-31.616-17.92h22.6304v-27.392h-22.6304v27.392z" fill="#3D3D58" /><path d="M754.952576 462.1824h50.1248v47.0016H754.952576v-47.0016z" fill="#FF7575" /><path d="M805.077376 518.144H754.952576a8.9856 8.9856 0 0 1-8.96-8.96v-47.0016a8.96 8.96 0 0 1 8.96-8.96h50.1248a8.96 8.96 0 0 1 8.96 8.96v47.0016a8.96 8.96 0 0 1-8.96 8.96z m-41.1392-17.92h32.1792v-29.0816H763.912576v29.056z" fill="#3D3D58" /><path d="M364.552576 407.2448h379.52v34.3552H364.578176v-34.3552z" fill="#FFFFFF" opacity=".68" /><path d="M358.946176 474.1376h385.152v35.0464H358.971776V474.112z" fill="#6E6E96" opacity=".15" /><path d="M552.661376 263.68h17.92v102.7072h-17.92v-102.6816z" fill="#444461" /><path d="M430.293376 295.68h256.768l-11.3408-28.416h-230.8864l-14.5408 28.416z" fill="#6E6E96" opacity=".15" /><path d="M570.632576 253.0304h21.76v61.7216h-21.76v-61.696z" fill="#6E6E96" opacity=".15" /><path d="M475.758976 316.1088H439.816576l2.56-19.2h33.3568v19.2zM593.262976 296.8832h33.3312v19.2256h-33.3312v-19.2z" fill="#FFFFFF" opacity=".6" /><path d="M502.638976 201.216m2.762945-10.311451l-0.006626 0.024727q2.762945-10.311451 13.074397-7.548506l61.794525 16.557793q10.311451 2.762945 7.548506 13.074397l0.006626-0.024728q-2.762945 10.311451-13.074396 7.548506l-61.794526-16.557793q-10.311451-2.762945-7.548506-13.074396Z" fill="#1558A6" /><path d="M604.917451 142.163643m-10.311452-2.762945l0.024728 0.006626q-10.311451-2.762945-13.074396 7.548506l-16.557794 61.794525q-2.762945 10.311451 7.548507 13.074396l-0.024728-0.006625q10.311451 2.762945 13.074397-7.548507l16.557793-61.794525q2.762945-10.311451-7.548507-13.074396Z" fill="#1558A6" /><path d="M525.294976 140.8m9.244994-5.3376l-0.02217 0.0128q9.244994-5.3376 14.582595 3.907394l45.8624 79.436007q5.3376 9.244994-3.907395 14.582595l0.02217-0.0128q-9.244994 5.3376-14.582594-3.907395l-45.8624-79.436007q-5.3376-9.244994 3.907394-14.582594Z" fill="#1558A6" /></svg>';

      var line = new maptalks.LineString(coordiantes, {
        symbol: {
          lineWidth: 5,
          lineColor: 'yellow'
        }
      });
      line.addTo(layer);
      map.setCenter(line.getCoordinates()[0]);
      var point = new maptalks.Marker(coordiantes[0], {
        symbol: {
          markerFile: markerFile,
          markerWidth: 50,
          markerHeight: 50
        }
      }).addTo(layer);

      var currentCoordinate, preCoordinate;

      // eslint-disable-next-line no-unused-vars
      function start() {
        line.animateShow(
          {
            duration: 100000,
            easing: 'linear'
          },
          function(frame, c) {
            currentCoordinate = c.copy();
            point.setCoordinates(currentCoordinate);
            if (preCoordinate) {
              if (!map.isInteracting()) {
                var bearing = getBearing(preCoordinate, currentCoordinate);
                map.setCenter(currentCoordinate);
                map.setBearing(bearing);
              }
            }
            preCoordinate = c.copy();
          }
        );
      }

      function getBearing(c1, c2) {
        // eslint-disable-next-line no-undef
        var p1 = turf.point(c1.toArray()),
          // eslint-disable-next-line no-undef
          p2 = turf.point(c2.toArray());
        // eslint-disable-next-line no-undef
        var bearing = turf.bearing(p1, p2);
        if (Math.abs(map.getBearing() - bearing) < 30) {
          return map.getBearing();
        }
        return bearing;
      }

    </script>
  </body>
</html>
Copied!