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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <meta
      name="description"
      content="How to export a subset of a CesiumJS scene as a KML/KMZ file."
    />
    <meta name="cesium-sandcastle-labels" content="Showcases, DataSources" />
    <title>Export KML</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script
      type="text/javascript"
      src="../../../Build/CesiumUnminified/Cesium.js"
      nomodule
    ></script>
    <script type="module" src="../load-cesium-es6.js"></script>
  </head>
  <body
    class="sandcastle-loading"
    data-sandcastle-bucket="bucket-requirejs.html"
  >
    <style>
      @import url(../templates/bucket.css);
    </style>
    <div id="cesiumContainer" class="fullSize"></div>
    <div id="loadingOverlay"><h1>Loading...</h1></div>
    <div id="toolbar">
      <div id="propertiesMenu"></div>
    </div>

    <script id="cesium_sandcastle_script">
      function startup(Cesium) {
        "use strict";
        //Sandcastle_Begin
        var viewer = new Cesium.Viewer("cesiumContainer", {
          shouldAnimate: true,
        });

        var modelCzml = [
          {
            id: "document",
            name: "CZML Model",
            version: "1.0",
          },
          {
            id: "aircraft model",
            name: "Cesium Air",
            position: {
              cartographicDegrees: [-77, 37, 0],
            },
            model: {
              gltf:
                "../../SampleData/models/CesiumMilkTruck/CesiumMilkTruck.glb",
            },
          },
        ];

        function downloadBlob(filename, blob) {
          if (window.navigator.msSaveOrOpenBlob) {
            window.navigator.msSaveBlob(blob, filename);
          } else {
            var elem = window.document.createElement("a");
            elem.href = window.URL.createObjectURL(blob);
            elem.download = filename;
            document.body.appendChild(elem);
            elem.click();
            document.body.removeChild(elem);
          }
        }

        function reset() {
          viewer.trackedEntity = undefined;
          viewer.dataSources.removeAll();
        }

        // We fetch the resources that will be embedded in the KMZ file.
        var daeModelPromise = Cesium.Resource.fetchBlob({
          url: "../../SampleData/models/CesiumMilkTruck/CesiumMilkTruck.dae",
        });

        var texturePromise = Cesium.Resource.fetchBlob({
          url: "../../SampleData/models/CesiumMilkTruck/CesiumMilkTruck.png",
        });

        // This callback allows us to set the URL of the model to use
        // a COLLADA version of the model instead of the glTF version.
        // It also lets us specify the files that will be embedded in the exported KMZ.
        function modelCallback(modelGraphics, time, externalFiles) {
          var resource = modelGraphics.uri.getValue(time);

          if (resource.url.indexOf("CesiumMilkTruck") !== -1) {
            externalFiles["model/CesiumMilkTruck.dae"] = daeModelPromise;
            externalFiles["model/CesiumMilkTruck.png"] = texturePromise;

            return "model/CesiumMilkTruck.dae";
          }

          throw Cesium.RuntimeError("Unknown Model");
        }

        var filenameToSave = "";
        var dataSourcePromise;

        Sandcastle.addToolbarMenu(
          [
            {
              text: "Satellites",
              onselect: function () {
                reset();
                filenameToSave = "Satellites.kmz";
                dataSourcePromise = Cesium.CzmlDataSource.load(
                  "../../SampleData/simple.czml"
                );
                viewer.dataSources.add(dataSourcePromise);

                viewer.camera.flyHome(0);
              },
            },
            {
              text: "Model",
              onselect: function () {
                reset();
                filenameToSave = "Model.kmz";
                dataSourcePromise = Cesium.CzmlDataSource.load(modelCzml);
                viewer.dataSources
                  .add(dataSourcePromise)
                  .then(function (dataSource) {
                    viewer.trackedEntity = dataSource.entities.getById(
                      "aircraft model"
                    );
                  });
              },
            },
          ],
          "propertiesMenu"
        );

        Sandcastle.addToolbarButton("Download", function () {
          dataSourcePromise
            .then(function (dataSource) {
              return Cesium.exportKml({
                entities: dataSource.entities,
                kmz: true,
                modelCallback: modelCallback,
              });
            })
            .then(function (result) {
              downloadBlob(filenameToSave, result.kmz);
            });
        });
        //Sandcastle_End
        Sandcastle.finishedLoading();
      }
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        startup(Cesium);
      }
    </script>
  </body>
</html>

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