learning_cesium/Camera对象.html

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2024-03-19 18:06:25 +08:00
<!DOCTYPE html>
<html lang="en">
<head>
<!-- Use correct character set. -->
<meta charset="utf-8">
<!-- Tell IE to use the latest, best version. -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- Make the application on mobile take up the full browser screen and disable user scaling. -->
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<title>Learning Cesium!</title>
<script src="./Build/Cesium/Cesium.js"></script>
<style>
@import url(./Build/Cesium/Widgets/widgets.css);
html,
body,
#cesiumContainer {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
overflow: hidden;
}
#credit {
display: none;
}
#viewChanged,
#cameraChanged {
display: none;
background-color: red;
color: white;
}
</style>
</head>
<body>
<div id="cesiumContainer"></div>
<div id="loadingOverlay">
<h1>Loading...</h1>
</div>
<div id="toolbar">
<div id="viewChanged">View Changed</div>
<div id="cameraChanged">Camera Changed</div>
</div>
<div id="credit"></div>
<script>
Cesium.Ion.defaultAccessToken =
'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiI5ZjRjNTZkNC01NDYxLTRhMjQtOGEwZC1kZjA3YzQ5YTJlZDkiLCJpZCI6MjYwODQsInNjb3BlcyI6WyJhc3IiLCJnYyJdLCJpYXQiOjE1ODcxOTMwODN9.prGsSKyAW_9Ow5zHYPhbm3LsQL-ApQw5-5PNJkDaHi8';
var viewer = new Cesium.Viewer('cesiumContainer', {
scene3DOnly: true,
selectionIndicator: false,
baseLayerPicker: false
});
// 移除默认的底图
viewer.imageryLayers.remove(viewer.imageryLayers.get(0));
// 添加哨兵影像 Sentinel-2 imagery
viewer.imageryLayers.addImageryProvider(new Cesium.IonImageryProvider({
assetId: 3954
}));
viewer.terrainProvider = Cesium.createWorldTerrain({
requestWaterMask: true, // required for water effects
requestVertexNormals: true // required for terrain lighting
});
//添加参考实体
var citizensBankPark = viewer.entities.add({
name: 'Citizens Bank Park',
position: Cesium.Cartesian3.fromDegrees(113.930, 22.5391),
point: {
pixelSize: 5,
color: Cesium.Color.RED,
outlineColor: Cesium.Color.WHITE,
outlineWidth: 2
},
label: {
text: 'Citizens Bank Park',
font: '14pt monospace',
style: Cesium.LabelStyle.FILL_AND_OUTLINE,
outlineWidth: 2,
verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
pixelOffset: new Cesium.Cartesian2(0, -9)
}
});
/**
* viewer.camera.lookAt(target, offset)
* target 必须是笛卡尔坐标;
* offset 可以是笛卡尔坐标也可以是 HeadingPitchRange
*
*/
// 1. Using a cartesian offset
var center = Cesium.Cartesian3.fromDegrees(113.930, 22.5391);
// viewer.camera.lookAt(center, new Cesium.Cartesian3(-10000.0, 1000.0, 50000));
// 2. Using a HeadingPitchRange offset
var heading = Cesium.Math.toRadians(100);
var pitch = Cesium.Math.toRadians(20);
var range = 10000.0;
// viewer.camera.lookAt(center, new Cesium.HeadingPitchRange(heading, pitch, range));
/**
* Camera.setView(options) 设置位置、方向、转换
* options配置参数
* destinationCartesian3 | Rectangle 在WGS84中 Camera 的最终位置坐标或从自上而下视图中可见的矩形。
* orientationObject 包含方向和向上属性或航向、俯仰和滚动属性的对象。
*
*/
// 1. Set position with a top-down view
// viewer.camera.setView({
// destination : Cesium.Cartesian3.fromDegrees(-117.16, 32.71, 15000.0)
// });
// 2 Set view with heading, pitch and roll
// viewer.camera.setView({
// destination : center,
// orientation: {
// heading : Cesium.Math.toRadians(90.0), // east, default value is 0.0 (north)
// pitch : Cesium.Math.toRadians(-90), // default value (looking down)
// roll : 0.0 // default value
// }
// });
//3. Change heading, pitch and roll with the camera position remaining the same.
// viewer.camera.setView({
// orientation: {
// heading : Cesium.Math.toRadians(90.0), // east, default value is 0.0 (north)
// pitch : Cesium.Math.toRadians(-90), // default value (looking down)
// roll : 0.0 // default value
// }
// })
// 4. View rectangle with a top-down view
// viewer.camera.setView({
// destination : Cesium.Rectangle.fromDegrees(113.930-1, 22.5391-1, 113.930+1, 22.5391+1)
// });
// 5. Set position with an orientation using unit vectors.
// viewer.camera.setView({
// destination : Cesium.Cartesian3.fromDegrees(-122.19, 46.25, 5000.0),
// orientation : {
// direction : new Cesium.Cartesian3(-0.04231243104240401, -0.20123236049443421, -0.97862924300734),
// up : new Cesium.Cartesian3(-0.47934589305293746, -0.8553216253114552, 0.1966022179118339)
// }
// });
var scene = viewer.scene;
var clock = viewer.clock;
var referenceFramePrimitive;
function flyToSanDiego() {
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(-117.16, 32.71, 15000.0),
});
}
function flyToHeadingPitchRoll() {
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(-122.22, 46.12, 5000.0),
orientation: {
heading: Cesium.Math.toRadians(20.0),
pitch: Cesium.Math.toRadians(-35.0),
roll: 0.0,
},
});
}
function flyToLocation() {
// Create callback for browser's geolocation
function fly(position) {
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(
position.coords.longitude,
position.coords.latitude,
1000.0
),
});
}
// Ask browser for location, and fly there.
navigator.geolocation.getCurrentPosition(fly);
}
function viewRectangle() {
var west = -77.0;
var south = 38.0;
var east = -72.0;
var north = 42.0;
var rectangle = Cesium.Rectangle.fromDegrees(west,south,east,north);
viewer.camera.setView({
destination: rectangle,
});
// Show the rectangle. Not required; just for show.
viewer.entities.add({
rectangle: {
coordinates: rectangle,
fill: false,
outline: true,
outlineColor: Cesium.Color.WHITE,
},
});
}
function flyToRectangle() {
var west = -90.0;
var south = 38.0;
var east = -87.0;
var north = 40.0;
var rectangle = Cesium.Rectangle.fromDegrees(west,south,east,north);
viewer.camera.flyTo({
destination: rectangle,
});
// Show the rectangle. Not required; just for show.
viewer.entities.add({
rectangle: {
coordinates: rectangle,
fill: false,
outline: true,
outlineColor: Cesium.Color.WHITE,
},
});
}
function setReferenceFrame() {
var center = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
var transform = Cesium.Transforms.eastNorthUpToFixedFrame(center);
// View in east-north-up frame
var camera = viewer.camera;
camera.constrainedAxis = Cesium.Cartesian3.UNIT_Z;
camera.lookAtTransform(
transform,
new Cesium.Cartesian3(-120000.0, -120000.0, 120000.0)
);
// Show reference frame. Not required.
referenceFramePrimitive = scene.primitives.add(
new Cesium.DebugModelMatrixPrimitive({
modelMatrix: transform,
length: 100000.0,
})
);
}
function setHeadingPitchRoll() {
var camera = viewer.camera;
camera.setView({
destination: Cesium.Cartesian3.fromDegrees(
-75.5847,
40.0397,
1000.0
),
orientation: {
heading: -Cesium.Math.PI_OVER_TWO,
pitch: -Cesium.Math.PI_OVER_FOUR,
roll: 0.0,
},
});
}
function icrf(scene, time) {
if (scene.mode !== Cesium.SceneMode.SCENE3D) {
return;
}
var icrfToFixed = Cesium.Transforms.computeIcrfToFixedMatrix(time);
if (Cesium.defined(icrfToFixed)) {
var camera = viewer.camera;
var offset = Cesium.Cartesian3.clone(camera.position);
var transform = Cesium.Matrix4.fromRotationTranslation(icrfToFixed);
camera.lookAtTransform(transform, offset);
}
}
function viewInICRF() {
viewer.camera.flyHome(0);
clock.multiplier = 3 * 60 * 60;
scene.postUpdate.addEventListener(icrf);
scene.globe.enableLighting = true;
}
var viewChanged = document.getElementById("viewChanged");
var removeStart;
var removeEnd;
function cameraEvents() {
var camera = viewer.camera;
removeStart = camera.moveStart.addEventListener(function() {
viewChanged.style.display = "block";
});
removeEnd = camera.moveEnd.addEventListener(function() {
viewChanged.style.display = "none";
});
}
var cameraChanged = document.getElementById("cameraChanged");
var removeChanged;
function cameraChanges() {
var i = 0;
removeChanged = viewer.camera.changed.addEventListener(function(
percentage
) {
++i;
cameraChanged.innerText =
"Camera Changed: " + i + ", " + percentage.toFixed(6);
cameraChanged.style.display = "block";
});
}
function flyInACity() {
var camera = scene.camera;
camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(
-73.98580932617188,
40.74843406689482,
363.34038727246224
),
complete: function() {
setTimeout(function() {
camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(
-73.98585975679403,
40.75759944127251,
186.50838555841779
),
orientation: {
heading: Cesium.Math.toRadians(200.0),
pitch: Cesium.Math.toRadians(-50.0),
},
easingFunction: Cesium.EasingFunction.LINEAR_NONE,
});
}, 1000);
},
});
}
function losAngelesToTokyo(adjustPitch) {
var camera = scene.camera;
var tokyoOptions = {
destination: Cesium.Cartesian3.fromDegrees(
139.8148,
35.7142,
20000.0
),
orientation: {
heading: Cesium.Math.toRadians(15.0),
pitch: Cesium.Math.toRadians(-60),
roll: 0.0,
},
duration: 20,
flyOverLongitude: Cesium.Math.toRadians(60.0),
};
var laOptions = {
destination: Cesium.Cartesian3.fromDegrees(
-117.729,
34.457,
10000.0
),
duration: 5,
orientation: {
heading: Cesium.Math.toRadians(-15.0),
pitch: -Cesium.Math.PI_OVER_FOUR,
roll: 0.0,
},
};
laOptions.complete = function() {
setTimeout(function() {
camera.flyTo(tokyoOptions);
}, 1000);
};
if (adjustPitch) {
tokyoOptions.pitchAdjustHeight = 1000;
laOptions.pitchAdjustHeight = 1000;
}
camera.flyTo(laOptions);
}
function flyOverLongitude(adjustPitch) {
losAngelesToTokyo();
}
function flyOverLongitudeWithPitch() {
losAngelesToTokyo(true);
}
var Sandcastle = window;
Sandcastle.addToolbarMenu([{
text: "Camera Options",
},
{
text: "Fly in a city",
onselect: function() {
reset();
flyInACity();
Sandcastle.highlight(flyInACity);
},
},
{
text: "Fly to San Diego",
onselect: function() {
reset();
flyToSanDiego();
Sandcastle.highlight(flyToSanDiego);
},
},
{
text: "Fly to Location with heading, pitch and roll",
onselect: function() {
reset();
flyToHeadingPitchRoll();
Sandcastle.highlight(flyToHeadingPitchRoll);
},
},
{
text: "Fly to My Location",
onselect: function() {
reset();
flyToLocation();
Sandcastle.highlight(flyToLocation);
},
},
{
text: "Fly to Rectangle",
onselect: function() {
reset();
flyToRectangle();
Sandcastle.highlight(flyToRectangle);
},
},
{
text: "View a Rectangle",
onselect: function() {
reset();
viewRectangle();
Sandcastle.highlight(viewRectangle);
},
},
{
text: "Set camera reference frame",
onselect: function() {
reset();
setReferenceFrame();
Sandcastle.highlight(setReferenceFrame);
},
},
{
text: "Set camera with heading, pitch, and roll",
onselect: function() {
reset();
setHeadingPitchRoll();
Sandcastle.highlight(setHeadingPitchRoll);
},
},
{
text: "View in ICRF",
onselect: function() {
reset();
viewInICRF();
Sandcastle.highlight(viewInICRF);
},
},
{
text: "Move events",
onselect: function() {
reset();
cameraEvents();
Sandcastle.highlight(cameraEvents);
},
},
{
text: "Camera changed event",
onselect: function() {
reset();
cameraChanges();
Sandcastle.highlight(cameraChanges);
},
},
{
text: "Fly from Los Angeles to Tokyo via Europe",
onselect: function() {
reset();
flyOverLongitude();
Sandcastle.highlight(flyOverLongitude);
},
},
{
text: "Look down during exaggerated flight",
onselect: function() {
reset();
flyOverLongitudeWithPitch();
Sandcastle.highlight(flyOverLongitudeWithPitch);
},
},
]);
Sandcastle.addToolbarButton("Complete Flight", function() {
scene.camera.completeFlight();
});
Sandcastle.addToolbarButton("Cancel Flight", function() {
scene.camera.cancelFlight();
});
function reset() {
scene.completeMorph();
viewer.entities.removeAll();
scene.primitives.remove(referenceFramePrimitive);
scene.tweens.removeAll();
if (Cesium.defined(removeStart)) {
removeStart();
removeEnd();
viewChanged.style.display = "none";
removeStart = undefined;
removeEnd = undefined;
}
if (Cesium.defined(removeChanged)) {
removeChanged();
removeChanged = undefined;
cameraChanged.style.display = "none";
}
viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
clock.multiplier = 1.0;
scene.postUpdate.removeEventListener(icrf);
scene.globe.enableLighting = false;
}
scene.morphComplete.addEventListener(function() {
reset();
});
</script>
</body>
</html>