159 lines
4.7 KiB
HTML
159 lines
4.7 KiB
HTML
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<!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 name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
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<meta name="description" content="Demonstration of imagery layers with rectangular cutouts.">
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<meta name="cesium-sandcastle-labels" content="Tutorials">
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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 type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script>
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<script type="text/javascript">
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require.config({
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baseUrl : '../../../Source',
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waitSeconds : 60
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});
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</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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<table class="infoPanel">
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<tbody>
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<tr>
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<td>Click on the Cesium display to start.</td>
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</tr>
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<tr>
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<td>w/s - move cutout north/south</td>
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</tr>
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<tr>
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<td>a/d - move cutout west/east</td>
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</tr>
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</tbody>
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</table>
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</div>
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<script id="cesium_sandcastle_script">
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function startup(Cesium) {
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'use strict';
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//Sandcastle_Begin
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var viewer = new Cesium.Viewer('cesiumContainer', {
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imageryProvider : Cesium.createTileMapServiceImageryProvider({
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url : Cesium.buildModuleUrl('Assets/Textures/NaturalEarthII')
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}),
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baseLayerPicker : false
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});
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var canvas = viewer.canvas;
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canvas.setAttribute('tabindex', '0'); // needed to put focus on the canvas
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canvas.onclick = function() {
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canvas.focus();
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};
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var scene = viewer.scene;
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var defaultImageryLayerCutout = Cesium.Rectangle.fromDegrees(-90, 20, -70, 40);
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// Cut a rectangle out of the base layer
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var layers = viewer.imageryLayers;
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var imageryBaseLayer = layers.get(0);
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imageryBaseLayer.cutoutRectangle = defaultImageryLayerCutout;
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// Fit a SingleTileImageryProvider inside the cutout on the lowest layer
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layers.addImageryProvider(new Cesium.SingleTileImageryProvider({
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url : '../images/Cesium_Logo_overlay.png',
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rectangle : defaultImageryLayerCutout
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}));
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// Add an Earth at Night layer and a "traveling" cutout
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var earthAtNight = layers.addImageryProvider(new Cesium.IonImageryProvider({ assetId: 3812 }));
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earthAtNight.cutoutRectangle = Cesium.Rectangle.fromDegrees(-100, 10, -60, 50);
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earthAtNight.alpha = 0.9;
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// "traveling" code
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var flags = {
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moveEast : false,
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moveWest : false,
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moveNorth : false,
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moveSouth : false
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};
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function getFlagForKeyCode(keyCode) {
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switch (keyCode) {
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case 'W'.charCodeAt(0):
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return 'moveNorth';
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case 'S'.charCodeAt(0):
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return 'moveSouth';
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case 'D'.charCodeAt(0):
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return 'moveEast';
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case 'A'.charCodeAt(0):
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return 'moveWest';
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default:
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return undefined;
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}
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}
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document.addEventListener('keydown', function(e) {
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var flagName = getFlagForKeyCode(e.keyCode);
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if (typeof flagName !== 'undefined') {
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flags[flagName] = true;
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}
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}, false);
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document.addEventListener('keyup', function(e) {
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var flagName = getFlagForKeyCode(e.keyCode);
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if (typeof flagName !== 'undefined') {
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flags[flagName] = false;
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}
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}, false);
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var moveIncrement = 0.05;
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viewer.clock.onTick.addEventListener(function(clock) {
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var travelingRectangle = earthAtNight.cutoutRectangle;
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if (flags.moveNorth && travelingRectangle.north + moveIncrement < Cesium.Math.PI_OVER_TWO) {
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travelingRectangle.north += moveIncrement;
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travelingRectangle.south += moveIncrement;
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}
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if (flags.moveSouth && travelingRectangle.south - moveIncrement > -Cesium.Math.PI_OVER_TWO) {
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travelingRectangle.north -= moveIncrement;
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travelingRectangle.south -= moveIncrement;
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}
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if (flags.moveEast) {
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travelingRectangle.east += moveIncrement;
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travelingRectangle.west += moveIncrement;
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}
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if (flags.moveWest) {
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travelingRectangle.east -= moveIncrement;
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travelingRectangle.west -= moveIncrement;
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}
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travelingRectangle.east = wrapLongitude(travelingRectangle.east);
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travelingRectangle.west = wrapLongitude(travelingRectangle.west);
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});
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function wrapLongitude(value) {
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if (value < -Cesium.Math.PI) {
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return value + Cesium.Math.TWO_PI;
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}
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if (value > Cesium.Math.PI) {
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return value - Cesium.Math.TWO_PI;
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}
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return value;
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}
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//Sandcastle_End
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Sandcastle.finishedLoading();
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}
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if (typeof Cesium !== 'undefined') {
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startup(Cesium);
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} else if (typeof require === 'function') {
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require(['Cesium'], startup);
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}
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</script>
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</body>
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</html>
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