Custom Post Process.html

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    <meta
      name="viewport"
      content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
    />
    <meta name="description" content="Custom post processing effect." />
    <meta
      name="cesium-sandcastle-labels"
      content="Showcases, Post Processing"
    />
    <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>
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  <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>
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    <script id="cesium_sandcastle_script">
      function startup(Cesium) {
        "use strict";
        //Sandcastle_Begin
        var viewer = new Cesium.Viewer("cesiumContainer", {
          shouldAnimate: true,
        });

        var position = Cesium.Cartesian3.fromDegrees(-123.0744619, 44.0503706);
        var url = "../../SampleData/models/CesiumMan/Cesium_Man.glb";
        viewer.trackedEntity = viewer.entities.add({
          name: url,
          position: position,
          model: {
            uri: url,
          },
        });

        var fragmentShaderSource =
          "uniform sampler2D colorTexture; \n" +
          "varying vec2 v_textureCoordinates; \n" +
          "const int KERNEL_WIDTH = 16; \n" +
          "void main(void) \n" +
          "{ \n" +
          "    vec2 step = czm_pixelRatio / czm_viewport.zw; \n" +
          "    vec2 integralPos = v_textureCoordinates - mod(v_textureCoordinates, 8.0 * step); \n" +
          "    vec3 averageValue = vec3(0.0); \n" +
          "    for (int i = 0; i < KERNEL_WIDTH; i++) \n" +
          "    { \n" +
          "        for (int j = 0; j < KERNEL_WIDTH; j++) \n" +
          "        { \n" +
          "            averageValue += texture2D(colorTexture, integralPos + step * vec2(i, j)).rgb; \n" +
          "        } \n" +
          "    } \n" +
          "    averageValue /= float(KERNEL_WIDTH * KERNEL_WIDTH); \n" +
          "    gl_FragColor = vec4(averageValue, 1.0); \n" +
          "} \n";
        viewer.scene.postProcessStages.add(
          new Cesium.PostProcessStage({
            fragmentShader: fragmentShaderSource,
          })
        );
        //Sandcastle_End
        Sandcastle.finishedLoading();
      }
      if (typeof Cesium !== "undefined") {
        window.startupCalled = true;
        startup(Cesium);
      }
    </script>
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