mirror of https://github.com/CesiumGS/cesium.git
347 lines
12 KiB
HTML
347 lines
12 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
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/>
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<meta name="description" content="Visualize worldwide, high-resolution terrain." />
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<meta name="cesium-sandcastle-labels" content="Tutorials, Showcases" />
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<title>Cesium Demo</title>
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<script type="text/javascript" src="../Sandcastle-header.js"></script>
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<script
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type="text/javascript"
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src="../../../Build/CesiumUnminified/Cesium.js"
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nomodule
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></script>
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<script type="module" src="../load-cesium-es6.js"></script>
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</head>
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<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
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<style>
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@import url(../templates/bucket.css);
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</style>
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<div id="cesiumContainer" class="fullSize"></div>
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<div id="loadingOverlay"><h1>Loading...</h1></div>
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<div id="toolbar">
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<div id="terrainMenu"></div>
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<div id="zoomButtons"></div>
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<div id="sampleButtons"></div>
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</div>
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<script id="cesium_sandcastle_script">
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window.startup = async function (Cesium) {
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"use strict";
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//Sandcastle_Begin
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const viewer = new Cesium.Viewer("cesiumContainer", {
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terrain: Cesium.Terrain.fromWorldTerrain({
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requestWaterMask: true,
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requestVertexNormals: true,
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}),
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});
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// set lighting to true
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viewer.scene.globe.enableLighting = true;
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// adjust time so scene is lit by sun
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viewer.clock.currentTime = Cesium.JulianDate.fromIso8601("2023-01-01T00:00:00");
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// setup alternative terrain providers
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const ellipsoidProvider = new Cesium.EllipsoidTerrainProvider();
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// Sine wave
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const customHeightmapWidth = 32;
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const customHeightmapHeight = 32;
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const customHeightmapProvider = new Cesium.CustomHeightmapTerrainProvider({
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width: customHeightmapWidth,
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height: customHeightmapHeight,
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callback: function (x, y, level) {
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const width = customHeightmapWidth;
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const height = customHeightmapHeight;
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const buffer = new Float32Array(width * height);
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for (let yy = 0; yy < height; yy++) {
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for (let xx = 0; xx < width; xx++) {
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const u = (x + xx / (width - 1)) / Math.pow(2, level);
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const v = (y + yy / (height - 1)) / Math.pow(2, level);
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const heightValue = 4000 * (Math.sin(8000 * v) * 0.5 + 0.5);
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const index = yy * width + xx;
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buffer[index] = heightValue;
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}
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}
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return buffer;
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},
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});
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Sandcastle.addToolbarMenu(
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[
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{
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text: "CesiumTerrainProvider - Cesium World Terrain",
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onselect: function () {
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viewer.scene.setTerrain(
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Cesium.Terrain.fromWorldTerrain({
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requestWaterMask: true,
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requestVertexNormals: true,
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}),
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);
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viewer.scene.globe.enableLighting = true;
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},
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},
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{
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text: "CesiumTerrainProvider - Cesium World Terrain - no effects",
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onselect: function () {
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viewer.scene.setTerrain(Cesium.Terrain.fromWorldTerrain());
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},
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},
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{
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text: "CesiumTerrainProvider - Cesium World Terrain w/ Lighting",
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onselect: function () {
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viewer.scene.setTerrain(
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Cesium.Terrain.fromWorldTerrain({
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requestVertexNormals: true,
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}),
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);
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viewer.scene.globe.enableLighting = true;
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},
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},
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{
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text: "CesiumTerrainProvider - Cesium World Terrain w/ Water",
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onselect: function () {
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viewer.scene.setTerrain(
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Cesium.Terrain.fromWorldTerrain({
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requestWaterMask: true,
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}),
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);
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},
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},
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{
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text: "EllipsoidTerrainProvider",
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onselect: function () {
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viewer.terrainProvider = ellipsoidProvider;
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},
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},
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{
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text: "CustomHeightmapTerrainProvider",
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onselect: function () {
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viewer.terrainProvider = customHeightmapProvider;
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},
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},
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{
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text: "VRTheWorldTerrainProvider",
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onselect: function () {
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viewer.scene.setTerrain(
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new Cesium.Terrain(
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Cesium.VRTheWorldTerrainProvider.fromUrl(
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"http://www.vr-theworld.com/vr-theworld/tiles1.0.0/73/",
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{
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credit: "Terrain data courtesy VT MÄK",
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},
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),
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),
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);
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},
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},
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{
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text: "ArcGISTerrainProvider",
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onselect: function () {
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viewer.scene.setTerrain(
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new Cesium.Terrain(
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Cesium.ArcGISTiledElevationTerrainProvider.fromUrl(
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"https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer",
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),
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),
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);
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},
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},
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],
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"terrainMenu",
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);
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Sandcastle.addDefaultToolbarMenu(
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[
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{
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text: "Mount Everest",
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onselect: function () {
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lookAtMtEverest();
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},
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},
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{
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text: "Half Dome",
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onselect: function () {
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const target = new Cesium.Cartesian3(
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-2489625.0836225147,
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-4393941.44443024,
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3882535.9454173897,
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);
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const offset = new Cesium.Cartesian3(
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-6857.40902037546,
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412.3284835694358,
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2147.5545426812023,
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);
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viewer.camera.lookAt(target, offset);
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viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
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},
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},
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{
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text: "San Francisco Bay",
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onselect: function () {
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const target = new Cesium.Cartesian3(
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-2708814.85583248,
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-4254159.450845907,
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3891403.9457429945,
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);
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const offset = new Cesium.Cartesian3(
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70642.66030209465,
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-31661.517948317807,
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35505.179997143336,
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);
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viewer.camera.lookAt(target, offset);
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viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
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},
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},
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],
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"zoomButtons",
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);
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let terrainSamplePositions;
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function lookAtMtEverest() {
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const target = new Cesium.Cartesian3(
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300770.50872389384,
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5634912.131394585,
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2978152.2865545116,
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);
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const offset = new Cesium.Cartesian3(
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6344.974098678562,
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-793.3419798081741,
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2499.9508860763162,
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);
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viewer.camera.lookAt(target, offset);
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viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
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}
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function sampleTerrainSuccess(terrainSamplePositions) {
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const ellipsoid = Cesium.Ellipsoid.WGS84;
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//By default, Cesium does not obsure geometry
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//behind terrain. Setting this flag enables that.
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viewer.scene.globe.depthTestAgainstTerrain = true;
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viewer.entities.suspendEvents();
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viewer.entities.removeAll();
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for (let i = 0; i < terrainSamplePositions.length; ++i) {
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const position = terrainSamplePositions[i];
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viewer.entities.add({
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name: position.height.toFixed(1),
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position: ellipsoid.cartographicToCartesian(position),
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billboard: {
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verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
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scale: 0.7,
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image: "../images/facility.gif",
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},
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label: {
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text: position.height.toFixed(1),
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font: "10pt monospace",
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horizontalOrigin: Cesium.HorizontalOrigin.CENTER,
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pixelOffset: new Cesium.Cartesian2(0, -14),
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fillColor: Cesium.Color.BLACK,
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outlineColor: Cesium.Color.BLACK,
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showBackground: true,
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backgroundColor: new Cesium.Color(0.9, 0.9, 0.9, 0.7),
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backgroundPadding: new Cesium.Cartesian2(4, 3),
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},
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});
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}
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viewer.entities.resumeEvents();
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}
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function createGrid(rectangleHalfSize) {
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const gridWidth = 41;
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const gridHeight = 41;
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const everestLatitude = Cesium.Math.toRadians(27.988257);
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const everestLongitude = Cesium.Math.toRadians(86.925145);
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const e = new Cesium.Rectangle(
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everestLongitude - rectangleHalfSize,
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everestLatitude - rectangleHalfSize,
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everestLongitude + rectangleHalfSize,
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everestLatitude + rectangleHalfSize,
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);
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const terrainSamplePositions = [];
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for (let y = 0; y < gridHeight; ++y) {
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for (let x = 0; x < gridWidth; ++x) {
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const longitude = Cesium.Math.lerp(e.west, e.east, x / (gridWidth - 1));
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const latitude = Cesium.Math.lerp(e.south, e.north, y / (gridHeight - 1));
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const position = new Cesium.Cartographic(longitude, latitude);
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terrainSamplePositions.push(position);
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}
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}
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return terrainSamplePositions;
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}
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Sandcastle.addToggleButton(
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"Enable Lighting",
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viewer.scene.globe.enableLighting,
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function (checked) {
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viewer.scene.globe.enableLighting = checked;
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},
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);
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Sandcastle.addToggleButton(
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"Enable fog",
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viewer.scene.fog.enabled,
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function (checked) {
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viewer.scene.fog.enabled = checked;
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},
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);
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Sandcastle.addToolbarButton(
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"Sample Everest Terrain at Level 9",
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function () {
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const terrainSamplePositions = createGrid(0.005);
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Promise.resolve(
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Cesium.sampleTerrain(viewer.terrainProvider, 9, terrainSamplePositions),
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).then(sampleTerrainSuccess);
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lookAtMtEverest();
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},
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"sampleButtons",
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);
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Sandcastle.addToolbarButton(
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"Sample Most Detailed Everest Terrain",
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function () {
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if (!Cesium.defined(viewer.terrainProvider.availability)) {
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window.alert(
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"sampleTerrainMostDetailed is not supported for the selected terrain provider",
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);
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return;
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}
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const terrainSamplePositions = createGrid(0.0005);
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Promise.resolve(
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Cesium.sampleTerrainMostDetailed(
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viewer.terrainProvider,
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terrainSamplePositions,
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),
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).then(sampleTerrainSuccess);
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lookAtMtEverest();
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},
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"sampleButtons",
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);
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//Sandcastle_End
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};
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if (typeof Cesium !== "undefined") {
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window.startupCalled = true;
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window.startup(Cesium).catch((error) => {
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"use strict";
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console.error(error);
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});
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Sandcastle.finishedLoading();
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}
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</script>
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</body>
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</html>
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