mirror of https://github.com/CesiumGS/cesium.git
350 lines
12 KiB
HTML
350 lines
12 KiB
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="Visualize worldwide, high-resolution bathymetry." />
|
|
<meta name="cesium-sandcastle-labels" content="Tutorials, 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);
|
|
|
|
#toolbar {
|
|
background: rgba(42, 42, 42, 0.8);
|
|
padding: 4px;
|
|
border-radius: 4px;
|
|
}
|
|
|
|
#toolbar input {
|
|
vertical-align: middle;
|
|
padding-top: 2px;
|
|
padding-bottom: 2px;
|
|
}
|
|
|
|
#toolbar .header {
|
|
font-weight: bold;
|
|
}
|
|
|
|
#toolbar #colorRamp {
|
|
width: 100%;
|
|
border: 1px solid lightgray;
|
|
}
|
|
|
|
#toolbar .cesium-button {
|
|
display: block;
|
|
}
|
|
|
|
#toolbar #minHeight {
|
|
text-align: right;
|
|
}
|
|
</style>
|
|
<div id="cesiumContainer" class="fullSize"></div>
|
|
<div id="loadingOverlay"><h1>Loading...</h1></div>
|
|
<div id="toolbar">
|
|
<table>
|
|
<tbody>
|
|
<tr>
|
|
<td class="header">Elevation</td>
|
|
</tr>
|
|
<tr>
|
|
<td id="minHeight"><span data-bind="text: minHeight"></span>m</td>
|
|
<td><canvas id="colorRamp"></canvas></td>
|
|
<td><span data-bind="text: maxHeight"></span>m</td>
|
|
</tr>
|
|
<tr>
|
|
<td class="header">Options</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Exaggeration</td>
|
|
<td>
|
|
<input
|
|
type="range"
|
|
min="1"
|
|
max="5"
|
|
step="0.1"
|
|
data-bind="value: exaggeration, valueUpdate: 'input'"
|
|
/>
|
|
<input type="text" size="5" data-bind="value: exaggeration" />
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<script id="cesium_sandcastle_script">
|
|
window.startup = async function (Cesium) {
|
|
"use strict";
|
|
//Sandcastle_Begin
|
|
const viewer = new Cesium.Viewer("cesiumContainer", {
|
|
timeline: false,
|
|
animation: false,
|
|
terrainProvider: await Cesium.createWorldBathymetryAsync({
|
|
requestVertexNormals: true,
|
|
}),
|
|
});
|
|
|
|
viewer.baseLayerPicker.viewModel.selectedImagery =
|
|
viewer.baseLayerPicker.viewModel.imageryProviderViewModels[11];
|
|
|
|
const scene = viewer.scene;
|
|
|
|
// Prevent the user from tilting beyond the ellipsoid surface
|
|
scene.screenSpaceCameraController.maximumTiltAngle = Math.PI / 2.0;
|
|
|
|
const globe = scene.globe;
|
|
globe.enableLighting = true;
|
|
globe.maximumScreenSpaceError = 1.0; // Load higher resolution tiles for better seafloor shading
|
|
|
|
Sandcastle.addToggleButton("Lighting enabled", true, function (checked) {
|
|
globe.enableLighting = checked;
|
|
});
|
|
|
|
// Light the scene with a hillshade effect similar to https://pro.arcgis.com/en/pro-app/latest/tool-reference/3d-analyst/how-hillshade-works.htm
|
|
scene.light = new Cesium.DirectionalLight({
|
|
direction: new Cesium.Cartesian3(1, 0, 0), // Updated every frame
|
|
});
|
|
|
|
const camera = scene.camera;
|
|
const cameraMaxHeight = globe.ellipsoid.maximumRadius * 2;
|
|
const scratchNormal = new Cesium.Cartesian3();
|
|
scene.preRender.addEventListener(function (scene, time) {
|
|
const surfaceNormal = globe.ellipsoid.geodeticSurfaceNormal(
|
|
camera.positionWC,
|
|
scratchNormal,
|
|
);
|
|
const negativeNormal = Cesium.Cartesian3.negate(surfaceNormal, surfaceNormal);
|
|
scene.light.direction = Cesium.Cartesian3.normalize(
|
|
Cesium.Cartesian3.add(negativeNormal, camera.rightWC, surfaceNormal),
|
|
scene.light.direction,
|
|
);
|
|
|
|
const zoomMagnitude =
|
|
Cesium.Cartesian3.magnitude(camera.positionWC) / cameraMaxHeight;
|
|
|
|
updateGlobeMaterialUniforms(zoomMagnitude);
|
|
});
|
|
|
|
Sandcastle.addToggleButton("Fog enabled", true, (checked) => {
|
|
scene.fog.enabled = checked;
|
|
globe.showGroundAtmosphere = checked;
|
|
});
|
|
|
|
// Globe materials
|
|
let showContourLines = true;
|
|
let showElevationColorRamp = true;
|
|
let invertContourLines = false;
|
|
|
|
const minHeight = -10000.0;
|
|
const seaLevel = 0.0;
|
|
const maxHeight = 2000.0;
|
|
const countourLineSpacing = 500.0;
|
|
|
|
const range = maxHeight - minHeight;
|
|
const d = (height) => (height - minHeight) / range;
|
|
|
|
// Create a color ramp based on https://matplotlib.org/cmocean/#deep
|
|
function getColorRamp() {
|
|
const ramp = document.getElementById("colorRamp");
|
|
ramp.width = 100;
|
|
ramp.height = 15;
|
|
const ctx = ramp.getContext("2d");
|
|
const grd = ctx.createLinearGradient(0, 0, 100, 0);
|
|
|
|
grd.addColorStop(d(maxHeight), "#B79E6C");
|
|
grd.addColorStop(d(100.0), "#FBFFEE");
|
|
grd.addColorStop(d(0.0), "#F9FCCA");
|
|
grd.addColorStop(d(-500.0), "#BDE7AD");
|
|
grd.addColorStop(d(-1000.0), "#81D2A3");
|
|
grd.addColorStop(d(-1500.0), "#5AB7A4");
|
|
grd.addColorStop(d(-2000.0), "#4C9AA0");
|
|
grd.addColorStop(d(-2500.0), "#437D9A");
|
|
grd.addColorStop(d(-4000.0), "#3E6194");
|
|
grd.addColorStop(d(-5000.0), "#424380");
|
|
grd.addColorStop(d(-8000.0), "#392D52");
|
|
grd.addColorStop(d(minHeight), "#291C2F");
|
|
|
|
ctx.fillStyle = grd;
|
|
ctx.fillRect(0, 0, ramp.width, ramp.height);
|
|
|
|
return ramp;
|
|
}
|
|
|
|
function getElevationContourMaterial() {
|
|
// Creates a composite material with both elevation shading and contour lines
|
|
return new Cesium.Material({
|
|
fabric: {
|
|
type: "ElevationColorContour",
|
|
materials: {
|
|
contourMaterial: {
|
|
type: "ElevationContour",
|
|
},
|
|
elevationRampMaterial: {
|
|
type: "ElevationRamp",
|
|
},
|
|
},
|
|
components: {
|
|
diffuse:
|
|
"(1.0 - contourMaterial.alpha) * elevationRampMaterial.diffuse + contourMaterial.alpha * contourMaterial.diffuse",
|
|
alpha: "max(contourMaterial.alpha, elevationRampMaterial.alpha)",
|
|
},
|
|
},
|
|
translucent: false,
|
|
});
|
|
}
|
|
|
|
function updateGlobeMaterialUniforms(zoomMagnitude) {
|
|
const material = globe.material;
|
|
if (!Cesium.defined(material)) {
|
|
return;
|
|
}
|
|
|
|
const spacing = 5.0 * Math.pow(10, Math.floor(4 * zoomMagnitude));
|
|
if (showContourLines) {
|
|
const uniforms = showElevationColorRamp
|
|
? material.materials.contourMaterial.uniforms
|
|
: material.uniforms;
|
|
|
|
uniforms.spacing = spacing * scene.verticalExaggeration;
|
|
}
|
|
|
|
if (showElevationColorRamp) {
|
|
const uniforms = showContourLines
|
|
? material.materials.elevationRampMaterial.uniforms
|
|
: material.uniforms;
|
|
uniforms.spacing = spacing * scene.verticalExaggeration;
|
|
uniforms.minimumHeight = minHeight * scene.verticalExaggeration;
|
|
uniforms.maximumHeight = maxHeight * scene.verticalExaggeration;
|
|
}
|
|
}
|
|
|
|
function updateGlobeMaterial() {
|
|
let material;
|
|
if (showContourLines) {
|
|
if (showElevationColorRamp) {
|
|
material = getElevationContourMaterial();
|
|
let shadingUniforms = material.materials.elevationRampMaterial.uniforms;
|
|
shadingUniforms.image = getColorRamp();
|
|
shadingUniforms.minimumHeight = minHeight * scene.verticalExaggeration;
|
|
shadingUniforms.maximumHeight = maxHeight * scene.verticalExaggeration;
|
|
shadingUniforms = material.materials.contourMaterial.uniforms;
|
|
shadingUniforms.width = 1.0;
|
|
shadingUniforms.spacing = countourLineSpacing * scene.verticalExaggeration;
|
|
shadingUniforms.color = invertContourLines
|
|
? Cesium.Color.WHITE.withAlpha(0.5)
|
|
: Cesium.Color.BLACK.withAlpha(0.5);
|
|
globe.material = material;
|
|
return;
|
|
}
|
|
|
|
material = Cesium.Material.fromType("ElevationContour");
|
|
const shadingUniforms = material.uniforms;
|
|
shadingUniforms.width = 1.0;
|
|
shadingUniforms.spacing = countourLineSpacing * scene.verticalExaggeration;
|
|
shadingUniforms.color = invertContourLines
|
|
? Cesium.Color.WHITE
|
|
: Cesium.Color.BLACK;
|
|
globe.material = material;
|
|
return;
|
|
}
|
|
|
|
if (showElevationColorRamp) {
|
|
material = Cesium.Material.fromType("ElevationRamp");
|
|
const shadingUniforms = material.uniforms;
|
|
shadingUniforms.image = getColorRamp();
|
|
shadingUniforms.minimumHeight = minHeight * scene.verticalExaggeration;
|
|
shadingUniforms.maximumHeight = maxHeight * scene.verticalExaggeration;
|
|
globe.material = material;
|
|
return;
|
|
}
|
|
|
|
globe.material = material;
|
|
}
|
|
|
|
updateGlobeMaterial();
|
|
|
|
Sandcastle.addToggleButton(
|
|
"Color ramp enabled",
|
|
showElevationColorRamp,
|
|
function (checked) {
|
|
showElevationColorRamp = checked;
|
|
updateGlobeMaterial();
|
|
},
|
|
);
|
|
|
|
Sandcastle.addToggleButton(
|
|
"Contour lines enabled",
|
|
showContourLines,
|
|
function (checked) {
|
|
showContourLines = checked;
|
|
updateGlobeMaterial();
|
|
},
|
|
);
|
|
|
|
Sandcastle.addToggleButton(
|
|
"Invert contour line color",
|
|
invertContourLines,
|
|
function (checked) {
|
|
invertContourLines = checked;
|
|
updateGlobeMaterial();
|
|
},
|
|
);
|
|
|
|
// Vertical exaggeration
|
|
const viewModel = {
|
|
exaggeration: scene.verticalExaggeration,
|
|
minHeight: minHeight,
|
|
maxHeight: maxHeight,
|
|
};
|
|
|
|
function updateExaggeration() {
|
|
scene.verticalExaggeration = Number(viewModel.exaggeration);
|
|
}
|
|
|
|
Cesium.knockout.track(viewModel);
|
|
const toolbar = document.getElementById("toolbar");
|
|
Cesium.knockout.applyBindings(viewModel, toolbar);
|
|
for (const name in viewModel) {
|
|
if (viewModel.hasOwnProperty(name)) {
|
|
Cesium.knockout.getObservable(viewModel, name).subscribe(updateExaggeration);
|
|
}
|
|
}
|
|
|
|
scene.camera.setView({
|
|
destination: new Cesium.Cartesian3(
|
|
-3877002.181627189,
|
|
5147948.256341475,
|
|
864384.3423478723,
|
|
),
|
|
orientation: new Cesium.HeadingPitchRoll(
|
|
5.914830423853524,
|
|
-0.7139104486007932,
|
|
0.00017507632714419685,
|
|
),
|
|
});
|
|
|
|
//Sandcastle_End
|
|
};
|
|
if (typeof Cesium !== "undefined") {
|
|
window.startupCalled = true;
|
|
window.startup(Cesium).catch((error) => {
|
|
"use strict";
|
|
console.error(error);
|
|
});
|
|
Sandcastle.finishedLoading();
|
|
}
|
|
</script>
|
|
</body>
|
|
</html>
|