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| 1 | +<!DOCTYPE html> |
| 2 | +<html lang="en"> |
| 3 | +<head> |
| 4 | + <meta charset="utf-8"> |
| 5 | + <meta http-equiv="X-UA-Compatible" content="IE=edge"> |
| 6 | + <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"> |
| 7 | + <meta name="description" content="Demonstration of imagery layers with rectangular cutouts."> |
| 8 | + <meta name="cesium-sandcastle-labels" content="Tutorials"> |
| 9 | + <title>Cesium Demo</title> |
| 10 | + <script type="text/javascript" src="../Sandcastle-header.js"></script> |
| 11 | + <script type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script> |
| 12 | + <script type="text/javascript"> |
| 13 | + require.config({ |
| 14 | + baseUrl : '../../../Source', |
| 15 | + waitSeconds : 60 |
| 16 | + }); |
| 17 | + </script> |
| 18 | +</head> |
| 19 | +<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html"> |
| 20 | +<style> |
| 21 | + @import url(../templates/bucket.css); |
| 22 | +</style> |
| 23 | +<div id="cesiumContainer" class="fullSize"></div> |
| 24 | +<div id="loadingOverlay"><h1>Loading...</h1></div> |
| 25 | +<div id="toolbar"> |
| 26 | + <table class="infoPanel"> |
| 27 | + <tbody> |
| 28 | + <tr> |
| 29 | + <td>Click on the Cesium display to start.</td> |
| 30 | + </tr> |
| 31 | + <tr> |
| 32 | + <td>w/s - move cutout north/south</td> |
| 33 | + </tr> |
| 34 | + <tr> |
| 35 | + <td>a/d - move cutout west/east</td> |
| 36 | + </tr> |
| 37 | + </tbody> |
| 38 | + </table> |
| 39 | +</div> |
| 40 | +<script id="cesium_sandcastle_script"> |
| 41 | +function startup(Cesium) { |
| 42 | + 'use strict'; |
| 43 | +//Sandcastle_Begin |
| 44 | +var viewer = new Cesium.Viewer('cesiumContainer', { |
| 45 | + imageryProvider : Cesium.createTileMapServiceImageryProvider({ |
| 46 | + url : Cesium.buildModuleUrl('Assets/Textures/NaturalEarthII') |
| 47 | + }), |
| 48 | + baseLayerPicker : false |
| 49 | +}); |
| 50 | + |
| 51 | +var canvas = viewer.canvas; |
| 52 | +canvas.setAttribute('tabindex', '0'); // needed to put focus on the canvas |
| 53 | +canvas.onclick = function() { |
| 54 | + canvas.focus(); |
| 55 | +}; |
| 56 | + |
| 57 | +var scene = viewer.scene; |
| 58 | + |
| 59 | +var defaultImageryLayerCutout = Cesium.Rectangle.fromDegrees(-90, 20, -70, 40); |
| 60 | + |
| 61 | +// Cut a rectangle out of the base layer |
| 62 | +var layers = viewer.imageryLayers; |
| 63 | +var imageryBaseLayer = layers.get(0); |
| 64 | + |
| 65 | +imageryBaseLayer.cutoutRectangle = defaultImageryLayerCutout; |
| 66 | + |
| 67 | +// Fit a SingleTileImageryProvider inside the cutout on the lowest layer |
| 68 | +layers.addImageryProvider(new Cesium.SingleTileImageryProvider({ |
| 69 | + url : '../images/Cesium_Logo_overlay.png', |
| 70 | + rectangle : defaultImageryLayerCutout |
| 71 | +})); |
| 72 | + |
| 73 | +// Add an Earth at Night layer and a "traveling" cutout |
| 74 | +var earthAtNight = layers.addImageryProvider(new Cesium.IonImageryProvider({ assetId: 3812 })); |
| 75 | +earthAtNight.cutoutRectangle = Cesium.Rectangle.fromDegrees(-100, 10, -60, 50); |
| 76 | +earthAtNight.alpha = 0.9; |
| 77 | + |
| 78 | +// "traveling" code |
| 79 | +var flags = { |
| 80 | + moveEast : false, |
| 81 | + moveWest : false, |
| 82 | + moveNorth : false, |
| 83 | + moveSouth : false |
| 84 | +}; |
| 85 | + |
| 86 | +function getFlagForKeyCode(keyCode) { |
| 87 | + switch (keyCode) { |
| 88 | + case 'W'.charCodeAt(0): |
| 89 | + return 'moveNorth'; |
| 90 | + case 'S'.charCodeAt(0): |
| 91 | + return 'moveSouth'; |
| 92 | + case 'D'.charCodeAt(0): |
| 93 | + return 'moveEast'; |
| 94 | + case 'A'.charCodeAt(0): |
| 95 | + return 'moveWest'; |
| 96 | + default: |
| 97 | + return undefined; |
| 98 | + } |
| 99 | +} |
| 100 | + |
| 101 | +document.addEventListener('keydown', function(e) { |
| 102 | + var flagName = getFlagForKeyCode(e.keyCode); |
| 103 | + if (typeof flagName !== 'undefined') { |
| 104 | + flags[flagName] = true; |
| 105 | + } |
| 106 | +}, false); |
| 107 | + |
| 108 | +document.addEventListener('keyup', function(e) { |
| 109 | + var flagName = getFlagForKeyCode(e.keyCode); |
| 110 | + if (typeof flagName !== 'undefined') { |
| 111 | + flags[flagName] = false; |
| 112 | + } |
| 113 | +}, false); |
| 114 | + |
| 115 | +var moveIncrement = 0.05; |
| 116 | +viewer.clock.onTick.addEventListener(function(clock) { |
| 117 | + var travelingRectangle = earthAtNight.cutoutRectangle; |
| 118 | + if (flags.moveNorth && travelingRectangle.north + moveIncrement < Cesium.Math.PI_OVER_TWO) { |
| 119 | + travelingRectangle.north += moveIncrement; |
| 120 | + travelingRectangle.south += moveIncrement; |
| 121 | + } |
| 122 | + if (flags.moveSouth && travelingRectangle.south - moveIncrement > -Cesium.Math.PI_OVER_TWO) { |
| 123 | + travelingRectangle.north -= moveIncrement; |
| 124 | + travelingRectangle.south -= moveIncrement; |
| 125 | + } |
| 126 | + if (flags.moveEast) { |
| 127 | + travelingRectangle.east += moveIncrement; |
| 128 | + travelingRectangle.west += moveIncrement; |
| 129 | + } |
| 130 | + if (flags.moveWest) { |
| 131 | + travelingRectangle.east -= moveIncrement; |
| 132 | + travelingRectangle.west -= moveIncrement; |
| 133 | + } |
| 134 | + travelingRectangle.east = wrapLongitude(travelingRectangle.east); |
| 135 | + travelingRectangle.west = wrapLongitude(travelingRectangle.west); |
| 136 | +}); |
| 137 | + |
| 138 | +function wrapLongitude(value) { |
| 139 | + if (value < -Cesium.Math.PI) { |
| 140 | + return value + Cesium.Math.TWO_PI; |
| 141 | + } |
| 142 | + if (value > Cesium.Math.PI) { |
| 143 | + return value - Cesium.Math.TWO_PI; |
| 144 | + } |
| 145 | + return value; |
| 146 | +} |
| 147 | + |
| 148 | +//Sandcastle_End |
| 149 | + Sandcastle.finishedLoading(); |
| 150 | +} |
| 151 | +if (typeof Cesium !== 'undefined') { |
| 152 | + startup(Cesium); |
| 153 | +} else if (typeof require === 'function') { |
| 154 | + require(['Cesium'], startup); |
| 155 | +} |
| 156 | +</script> |
| 157 | +</body> |
| 158 | +</html> |
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