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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<script src="./weatherEffects.js"></script>
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</head>
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<body style="margin: 0; overflow: hidden; background: #fff; width: 100%; height: 100%; position: absolute; top: 0">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<audio style="display: none;" loop autoplay src="./dl.mp3"></audio>
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<script type="text/javascript">
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI3ZjQ5ZGUzNC1jNWYwLTQ1ZTMtYmNjYS05YTY4ZTVmN2I2MDkiLCJpZCI6MTE3MTM4LCJpYXQiOjE2NzY0NDUyODB9.ZaNSBIfc1sGLhQd_xqhiSsc0yr8oS0wt1hAo9gbke6M'
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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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// 开启帧率
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viewer.scene.debugShowFramesPerSecond = true;
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// 加载默认地形
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viewer.terrainProvider = new Cesium.CesiumTerrainProvider({
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url: 'http://data.mars3d.cn/terrain'
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});
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// 深度监测
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viewer.scene.globe.depthTestAgainstTerrain = true;
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viewer.camera.setView({
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destination: Cesium.Cartesian3.fromDegrees(121.662323, 20.157338, 271712),
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easingFunction: Cesium.EasingFunction.LINEAR_NONE,
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orientation: {
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heading: Cesium.Math.toRadians(350.3),
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pitch: Cesium.Math.toRadians(-27.4),
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roll: 0.0
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},
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});
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setTimeout(() => {
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viewer.camera.flyTo({
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destination: Cesium.Cartesian3.fromDegrees(98.865691, 28.358436, 16210.4),
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easingFunction: Cesium.EasingFunction.LINEAR_NONE,
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duration: 5,
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easingFunction: Cesium.EasingFunction.LINEAR_NONE,
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orientation: {
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heading: Cesium.Math.toRadians(331.5),
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pitch: Cesium.Math.toRadians(-20.2),
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roll: 0.0
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}
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});
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}, 5000);
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start();
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function start() {
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viewer.entities.removeAll(); //删除所有
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let waterHeight = 3900
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let targertWaterHeight = 5000
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let speed;
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let times;
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var startTime = Cesium.JulianDate.now();
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const redPolygon = viewer.entities.add({
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name: "最简单的贴地面",
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polygon: {
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extrudedHeight: new Cesium.CallbackProperty(function () {
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console.log(startTime)
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console.log(Cesium.JulianDate.now())
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// 要按流速速度的话，加时间判断即可
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waterHeight += 1;
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if (waterHeight > targertWaterHeight) {
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waterHeight = targertWaterHeight;
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}
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return waterHeight;
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}, false),
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hierarchy: Cesium.Cartesian3.fromDegreesArray([97.56045631976923, 29.59433175465213, 97.56045631976923, 27.934801881214653, 100.39490750962062, 27.934801881214653, 100.39490750962062, 29.59433175465213, 97.56045631976923, 29.59433175465213]),
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material: new Cesium.Color.fromBytes(64, 157, 253, 125),
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perPositionHeight: true,
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},
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});
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}
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// 雨
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new weatherEffects(viewer, {
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name: 'a',
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type: 'rain'
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});
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// 闪电
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let Lightning = `
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float hash(float x)
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{
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return fract(21654.6512 * sin(385.51 * x));
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}
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float hash(vec2 p)
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{
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return fract(1654.65157 * sin(15.5134763 * p.x + 45.5173247 * p.y + 5.21789));
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}
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vec2 hash2(vec2 p)
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{
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return vec2(hash(p * .754), hash(1.5743 * p + 4.5476351));
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}
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vec2 add = vec2(1.0, 0.0);
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vec2 noise2(vec2 x)
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{
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vec2 p = floor(x);
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vec2 f = fract(x);
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f = f * f * (3.0 - 2.0 * f);
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vec2 res = mix(mix(hash2(p),
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hash2(p + add.xy), f.x),
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mix(hash2(p + add.yx), hash2(p + add.xx), f.x), f.y);
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return res;
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}
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vec2 fbm2(vec2 x)
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{
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vec2 r = vec2(0.0);
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float a = 1.0;
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for (int i = 0; i < 8; i++)
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{
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r += noise2(x) * a;
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x *= 2.;
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a *= .5;
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}
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return r;
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}
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float dseg(vec2 ba, vec2 pa)
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{
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float h = clamp(dot(pa, ba) / dot(ba, ba), -0.2, 1.);
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return length(pa - ba * h);
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}
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uniform sampler2D colorTexture;
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uniform float fall_interval;
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uniform float mix_factor;
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varying vec2 v_textureCoordinates;
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void main(void){
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vec2 uv = gl_FragCoord.xy;
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float iTime = czm_frameNumber * fall_interval * clamp(fall_interval * 0.1, 0.01, 0.1);
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vec2 p = uv / czm_viewport.zw;
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vec2 d;
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vec2 tgt = vec2(1., -1.);
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float c = 0.;
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if (p.y >= 0.)
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c = (1. - (fbm2((p + .2) * p.y + .1 * iTime)).x) * p.y;
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else
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c = (1. - (fbm2(p + .2 + .1 * iTime)).x) * p.y * p.y;
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vec3 col = vec3(0.);
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vec3 col1 = c * vec3(.3, .5, 1.);
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float mdist = 100000.;
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float t = hash(floor(5. * iTime));
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tgt += 4. * hash2(tgt + t) - 1.5;
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if (hash(t + 2.3) > .6)
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for (int i = 0; i < 100; i++) {
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vec2 dtgt = tgt - p;
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d = .05 * (vec2(-.5, -1.) + hash2(vec2(float(i), t)));
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float dist = dseg(d, dtgt);
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mdist = min(mdist, dist);
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tgt -= d;
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c = exp(-1.2 * dist) + exp(-55. * mdist);
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col = c * vec3(.7, .8, 1.);
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}
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col += col1;
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gl_FragColor = mix(texture2D(colorTexture, v_textureCoordinates), vec4(col, 0.0), mix_factor);
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}
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`
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Cesium.PostProcessStageLibrary.createLightningStage = function (val) {
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return new Cesium.PostProcessStage({
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name: 'czm_lightning',
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fragmentShader: Lightning,
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uniforms: {
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mix_factor: val.mix_factor,//混合系数0-1之间的数
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fall_interval: 0.8,//0-1之间的数
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}
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});
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}
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var collection = viewer.scene.postProcessStages;
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var lightning = Cesium.PostProcessStageLibrary.createLightningStage({
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mix_factor: 0.35,//混合系数
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});
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collection.add(lightning);
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</script>
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</body>
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</html>
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