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HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta
name="viewport"
content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
/>
<meta
name="description"
content="Set a custom resolution scale and/or toggle the browser's recommended resolution."
/>
<meta name="cesium-sandcastle-labels" content="Showcases" />
<title>Cesium Demo</title>
<script type="text/javascript" src="../Sandcastle-header.js"></script>
<script
type="text/javascript"
src="../../../Build/CesiumUnminified/Cesium.js"
nomodule
></script>
<script type="module" src="../load-cesium-es6.js"></script>
</head>
<body
class="sandcastle-loading"
data-sandcastle-bucket="bucket-requirejs.html"
>
<style>
@import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar">
<table>
<tbody>
<tr>
<td>Use Browser Recommended Resolution</td>
<td>
<input
type="checkbox"
data-bind="checked: useBrowserRecommendedResolution"
/>
</td>
</tr>
<tr>
<td>Resolution Scale</td>
<td>
<input
type="range"
min="0.1"
max="2.0"
step="0.1"
data-bind="value: resolutionScale, valueUpdate: 'input'"
/>
<input type="text" size="5" data-bind="value: resolutionScale" />
</td>
</tr>
</tbody>
</table>
</div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
"use strict";
//Sandcastle_Begin
// When browser recommended resolution is enabled, the viewer renders at
// CSS pixel resolution (96 dpi). Otherwise, the viewer renders at the
// screen's native resolution.
//
// Resolution scale applies an additional scaling factor to the
// WebGL canvas.
//
// For example, if the cesium container div is 500x500 pixels,
// window.devicePixelRatio is 2.0, and useBrowserRecommendedResolution
// is false, the WebGL canvas will be 1000x1000 pixels. Then if
// the resolutionScale is 0.25, the canvas will be scaled
// down to 250x250 pixels.
var viewer = new Cesium.Viewer("cesiumContainer");
var viewModel = {
useBrowserRecommendedResolution: false,
resolutionScale: 0.25,
};
Cesium.knockout.track(viewModel);
var toolbar = document.getElementById("toolbar");
Cesium.knockout.applyBindings(viewModel, toolbar);
for (var name in viewModel) {
if (viewModel.hasOwnProperty(name)) {
Cesium.knockout.getObservable(viewModel, name).subscribe(update);
}
}
function update() {
viewer.useBrowserRecommendedResolution =
viewModel.useBrowserRecommendedResolution;
var resolutionScale = Number(viewModel.resolutionScale);
resolutionScale = !isNaN(resolutionScale) ? resolutionScale : 1.0;
resolutionScale = Cesium.Math.clamp(resolutionScale, 0.1, 2.0);
viewer.resolutionScale = resolutionScale;
}
update();
//Sandcastle_End
Sandcastle.finishedLoading();
}
if (typeof Cesium !== "undefined") {
window.startupCalled = true;
startup(Cesium);
}
</script>
</body>
</html>