Imagery Layers Split.html

<!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="Use the split property to only show layers on one side of a slider."
    />
    <meta
      name="cesium-sandcastle-labels"
      content="Beginner, Tutorials, Showcases"
    />
    <title>Cesium Demo</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);

      #slider {
        position: absolute;
        left: 50%;
        top: 0px;
        background-color: #d3d3d3;
        width: 5px;
        height: 100%;
        z-index: 9999;
      }

      #slider:hover {
        cursor: ew-resize;
      }
    </style>

    <div id="cesiumContainer" class="fullSize">
      <div id="slider"></div>
    </div>
    <div id="loadingOverlay"><h1>Loading...</h1></div>
    <div id="toolbar"></div>

    <script id="cesium_sandcastle_script">
      function startup(Cesium) {
        "use strict";
        //Sandcastle_Begin
        var viewer = new Cesium.Viewer("cesiumContainer", {
          imageryProvider: new Cesium.ArcGisMapServerImageryProvider({
            url:
              "https://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer",
          }),
          baseLayerPicker: false,
          infoBox: false,
        });

        var layers = viewer.imageryLayers;
        var earthAtNight = layers.addImageryProvider(
          new Cesium.IonImageryProvider({ assetId: 3812 })
        );
        earthAtNight.splitDirection = Cesium.ImagerySplitDirection.LEFT; // Only show to the left of the slider.

        // Sync the position of the slider with the split position
        var slider = document.getElementById("slider");
        viewer.scene.imagerySplitPosition =
          slider.offsetLeft / slider.parentElement.offsetWidth;

        var handler = new Cesium.ScreenSpaceEventHandler(slider);

        var moveActive = false;

        function move(movement) {
          if (!moveActive) {
            return;
          }

          var relativeOffset = movement.endPosition.x;
          var splitPosition =
            (slider.offsetLeft + relativeOffset) /
            slider.parentElement.offsetWidth;
          slider.style.left = 100.0 * splitPosition + "%";
          viewer.scene.imagerySplitPosition = splitPosition;
        }

        handler.setInputAction(function () {
          moveActive = true;
        }, Cesium.ScreenSpaceEventType.LEFT_DOWN);
        handler.setInputAction(function () {
          moveActive = true;
        }, Cesium.ScreenSpaceEventType.PINCH_START);

        handler.setInputAction(move, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
        handler.setInputAction(move, Cesium.ScreenSpaceEventType.PINCH_MOVE);

        handler.setInputAction(function () {
          moveActive = false;
        }, Cesium.ScreenSpaceEventType.LEFT_UP);
        handler.setInputAction(function () {
          moveActive = false;
        }, Cesium.ScreenSpaceEventType.PINCH_END);

        //Sandcastle_End
        Sandcastle.finishedLoading();
      }
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        startup(Cesium);
      }
    </script>
  </body>
</html>