2025-03-11 08:25:45 +00:00
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<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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2025-03-19 03:00:22 +00:00
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<link rel="stylesheet" href="./../../libs/cesium/Cesium1.98/Widgets/widgets.css" />
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<script type="text/javascript" src="./../../libs/cesium/Cesium1.98/Cesium.js"></script>
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2025-03-11 08:25:45 +00:00
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</head>
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<body style="
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margin: 0;
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overflow: hidden;
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background: #fff;
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width: 100%;
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height: 100%;
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position: absolute;
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top: 0;
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">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<script type="text/javascript">
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Cesium.Ion.defaultAccessToken =
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2025-05-29 02:59:44 +00:00
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"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiIyNDMxOTA2NS1lY2Q3LTQ0YmUtOTE1Mi1iNWE2OGYwZjc0MjkiLCJpZCI6MjM1NjMwLCJpYXQiOjE3MzA3MjQzMTJ9.Xhu-9FyVEyqBKWEr0V9Sybt-elTCWHt9peL9-mNh-4E";
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2025-03-11 08:25:45 +00:00
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const viewer = new Cesium.Viewer("map", {
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contextOptions: {
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// requestWebgl1: true,
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},
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});
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viewer.scene.debugShowFramesPerSecond = true;
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viewer.scene.globe.depthTestAgainstTerrain = true;
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/*
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----------------------------------Material-----------------------------
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*/
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// Primitive对象的自定义可视化，Cesium为其提供了Appearance和Material对象。
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// 其中，Material只负责片段着色器中材质部分的代码，
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// 而Appearance负责该Primitive整个Shader的代码，包括顶点着色器和片段着色器两个部分。
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// 可以理解为Appearance为Material之上的又一层封装，负责将Material赋给对应的Primitive对象。
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// Appearance中的属性值Materia的三种创建方式
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// 1、Material.fromType
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// 2、new Cesium.Material()
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// 3、fabric
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/*
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var appearance = new Cesium.MaterialAppearance();
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viewer.scene.primitives.add(
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new Cesium.Primitive({
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geometryInstances: instances,
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appearance: appearance
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}));
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// 1、Material.fromType
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appearance.material = Cesium.Material.fromType('Color');
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appearance.material.uniforms.color = new Cesium.Color(1.0, 1.0, 0.0, 1.0);
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// 2、new Cesium.Material()
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appearance.material = new Cesium.Material();
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// 3、fabric
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appearance.material = new Cesium.Material({
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fabric: {
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type: 'Color',
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uniforms: {
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color: new Cesium.Color(1.0, 1.0, 0.0, 1.0)
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},
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source: fs
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}
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});
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*/
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let source = `czm_material czm_getMaterial(czm_materialInput materialInput)
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{
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czm_material material = czm_getDefaultMaterial(materialInput);
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vec2 st = materialInput.st;
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vec4 colorImage = texture(image, vec2(fract((st.s - speed * czm_frameNumber * 0.001)), st.t));
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material.alpha = colorImage.a * color.a;
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material.diffuse = color.rgb;
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return material;
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}`;
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2025-03-31 02:42:55 +00:00
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2025-03-11 08:25:45 +00:00
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let material = new Cesium.Material({
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fabric: {
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uniforms: {
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color: Cesium.Color.fromCssColorString('#7ffeff'),
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image: "./line1.png",
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speed: 10,
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},
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source: source,
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},
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translucent: function () {
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return true
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},
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});
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var appearance = new Cesium.PolylineMaterialAppearance();
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appearance.material = material;
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viewer.scene.primitives.add(
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new Cesium.Primitive({
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geometryInstances: new Cesium.GeometryInstance({
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geometry: new Cesium.PolylineGeometry({
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positions: Cesium.Cartesian3.fromDegreesArray([
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-112, 36,
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-100, 38,
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-90, 42
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]),
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width: 5.0,
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}),
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}),
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appearance: appearance
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})
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);
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</script>
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</body>
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</html>
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