<!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
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name="description"
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content="Use image-based lighting to light a model."
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/>
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<meta name="cesium-sandcastle-labels" content="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
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class="sandcastle-loading"
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data-sandcastle-bucket="bucket-requirejs.html"
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>
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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>
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<tbody>
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<tr>
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<td>Luminance at Zenith</td>
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<td>
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<input
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type="range"
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min="0.0"
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max="2.0"
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step="0.01"
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data-bind="value: luminanceAtZenith, valueUpdate: 'input'"
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/>
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<input
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type="text"
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size="4"
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data-bind="value: luminanceAtZenith"
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/>
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</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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if (!viewer.scene.specularEnvironmentMapsSupported) {
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window.alert(
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"This browser does not support specular environment maps."
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);
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}
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var environmentMapURL =
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"https://cesium.com/public/SandcastleSampleData/kiara_6_afternoon_2k_ibl.ktx2";
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var modelURL = "../../SampleData/models/Pawns/Pawns.glb";
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// This environment map was processed using Khronos's glTF IBL Sampler. To process your own:
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// 1 - Download and build the Khronos glTF IBL Sampler (https://github.com/KhronosGroup/glTF-IBL-Sampler).
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// 2 - Run `cli -inputPath /path/to/image.hdr -outCubeMap /path/to/output.ktx2`. Run `cli -h` for all options.
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// To generate the spherical harmonic coefficients below, use Google's Filament project:
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// 1 - Download the Filament release (https://github.com/google/filament/releases).
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// 2 - Run `cmgen --type=ktx --deploy=/path/to/output /path/to/image.hdr`. Other formats are also supported. Run `cmgen --help` for all options.
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// 3 - Take the generated coefficients and load them in CesiumJS as shown below.
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var L00 = new Cesium.Cartesian3(
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1.234709620475769,
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1.221461296081543,
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1.273156881332397
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);
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var L1_1 = new Cesium.Cartesian3(
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1.135921120643616,
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1.171217799186707,
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1.287644743919373
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);
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var L10 = new Cesium.Cartesian3(
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1.245193719863892,
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1.245591878890991,
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1.282818794250488
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);
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var L11 = new Cesium.Cartesian3(
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-1.106930732727051,
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-1.112522482872009,
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-1.153198838233948
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);
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var L2_2 = new Cesium.Cartesian3(
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-1.086226940155029,
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-1.079731941223145,
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-1.101912498474121
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);
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var L2_1 = new Cesium.Cartesian3(
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1.189834713935852,
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1.185906887054443,
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1.214385271072388
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);
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var L20 = new Cesium.Cartesian3(
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0.01778045296669,
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0.02013735473156,
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0.025313569232821
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);
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var L21 = new Cesium.Cartesian3(
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-1.086826920509338,
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-1.084611177444458,
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-1.111204028129578
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);
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var L22 = new Cesium.Cartesian3(
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-0.05241484940052,
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-0.048303380608559,
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-0.041960217058659
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);
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var coefficients = [L00, L1_1, L10, L11, L2_2, L2_1, L20, L21, L22];
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var height = 0.0;
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var hpr = new Cesium.HeadingPitchRoll(0.0, 0.0, 0.0);
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var origin = Cesium.Cartesian3.fromDegrees(
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-123.0744619,
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44.0503706,
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height
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);
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var modelMatrix = Cesium.Transforms.headingPitchRollToFixedFrame(
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origin,
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hpr
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);
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var model = viewer.scene.primitives.add(
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Cesium.Model.fromGltf({
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url: modelURL,
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modelMatrix: modelMatrix,
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minimumPixelSize: 128,
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})
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);
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model.readyPromise
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.then(function (model) {
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var camera = viewer.camera;
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// Zoom to model
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var controller = viewer.scene.screenSpaceCameraController;
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var r =
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2.0 * Math.max(model.boundingSphere.radius, camera.frustum.near);
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controller.minimumZoomDistance = r * 0.5;
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var center = Cesium.Matrix4.multiplyByPoint(
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model.modelMatrix,
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model.boundingSphere.center,
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new Cesium.Cartesian3()
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);
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var heading = Cesium.Math.toRadians(230.0);
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var pitch = Cesium.Math.toRadians(-20.0);
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camera.lookAt(
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center,
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new Cesium.HeadingPitchRange(heading, pitch, r * 2.0)
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);
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camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
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model.sphericalHarmonicCoefficients = coefficients;
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model.specularEnvironmentMaps = environmentMapURL;
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// The viewModel tracks the state of our mini application.
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var viewModel = {
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luminanceAtZenith: model.luminanceAtZenith,
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};
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// Convert the viewModel members into knockout observables.
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Cesium.knockout.track(viewModel);
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// Bind the viewModel to the DOM elements of the UI that call for it.
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var toolbar = document.getElementById("toolbar");
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Cesium.knockout.applyBindings(viewModel, toolbar);
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function subscribeParameter(name) {
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Cesium.knockout
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.getObservable(viewModel, name)
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.subscribe(function (newValue) {
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model[name] = newValue;
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});
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}
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subscribeParameter("luminanceAtZenith");
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Sandcastle.addToggleButton(
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"Use procedural environment lighting",
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false,
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function (checked) {
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if (!checked) {
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model.sphericalHarmonicCoefficients = coefficients;
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model.specularEnvironmentMaps = environmentMapURL;
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} else {
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model.sphericalHarmonicCoefficients = undefined;
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model.specularEnvironmentMaps = undefined;
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}
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}
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);
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})
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.otherwise(function (error) {
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window.alert(error);
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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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window.startupCalled = true;
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startup(Cesium);
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}
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</script>
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</body>
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</html>
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