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Basic use of cesium, including loading images, terrain, models, vector data, etc
2022-06-13 08:44:00 【Dependency_ Lai】
Load sphere
1、 download cesium package https://download.csdn.net/download/weixin_39150852/20303629, stay html In the introduction
<link href="static/Cesium-1.82/Build/Cesium/Widgets/widgets.css" rel="stylesheet"/>
<script src="static/Cesium-1.82/Build/Cesium/Cesium.js" type="text/javascript"></script>
2、 Define public methods , Introduced the global
Array.prototype.filter = Array.prototype.filter || function (func) {
var arr = this;
var r = [];
for (var i = 0; i < arr.length; i++) {
if (func(arr[i], i, arr)) {
r.push(arr[i]);
}
}
return r;
}
Array.prototype.firstOrDefault = Array.prototype.firstOrDefault || function (func) {
var arr = this;
var r=null ;
for (var i = 0; i < arr.length; i++) {
if (func(arr[i], i, arr)) {
r=arr[i];
break;
}
}
return r;
}
Array.prototype.where = Array.prototype.where || function (func) {
var arr = this;
var r = [];
for (var i = 0; i < arr.length; i++) {
if (func(arr[i], i, arr)) {
r.push(arr[i]);
}
}
return r;
}
3、 Initialize map
<template>
<div>
<div id='cesiumContainer'></div>
</div>
</template>
<script>
var viewer = null;
export default {
components: {
},
data() {
return {
}
},
mounted(){
this.initMap();
},
methods: {
initMap(){
viewer = new Cesium.Viewer('cesiumContainer', {
geocoder: false,// Place name search , Default true
homeButton: false,// Home button , Default true
sceneModePicker: false,// 2D,3D and Columbus View Toggle control
baseLayerPicker: false,// Map switch control ( Base map and topographic map ) Whether or not shown , Default display true
navigationHelpButton: false,// Help prompt control
animation: false, // View animation playback speed control , Default true
timeline: false,// Timeline , Default true
fullscreenButton: false,// Full screen button , Default display true
infoBox: false,// Information displayed after clicking on the element , Default true
selectionIndicator: false,// The selected element displays , Default true
scene3DOnly: true, // only 3D Rendering , save GPU Memory
// If not set imageryProvider attribute , An image will be loaded by default
// If not set terrainProvider attribute , A terrain will be loaded by default
});
viewer.scene.globe.depthTestAgainstTerrain = true; // Solve the problem of clicking and reporting errors in vertical view
viewer.cesiumWidget.creditContainer.style.display = "none";// hide Logo, watermark
viewer.imageryLayers.removeAll(); // Delete default video
}
}
}
</script>
<style lang="scss" scoped>
// Set map width and height , If it is not set canvas The height of will always increase
#cesiumContainer {
width: 98%;
height: 87%;
position: absolute
}
</style>
Hiding watermarks can also be done by css Method realization ：
.cesium-viewer-timelineContainer,
.cesium-viewer-animationContainer,
.cesium-viewer-bottom {
display: none !important;
}
Load image （ Multi layer images can be superimposed ）
addImagery() {
var _lyr = viewer.imageryLayers._layers.firstOrDefault(t => {
if (t.lyr_ID && t.lyr_ID == 'baseImageLayerID' && t.lyr_NAME && t.lyr_NAME == ' Image basemap ') {
return t; }
});
if (_lyr) return;
// Sky map image 、arcgis Local slicing service for 、arcgis released imageServer、 Kylin map 、 released zxy Form of map service
/*let imageryProvider = new Cesium.UrlTemplateImageryProvider({ url: "http://t4.tianditu.com/DataServer?T=img_w&x={x}&y={y}&l={z}&tk=4b01c1b56c6bcba2eb9b8e987529c44f", //url: "http://117.176.159.208:48021/ National image /{z}/{x}/{y}.png", tileWidth: 512, tileHeight: 512, maximumLevel: 18, })*/
//arcgisserver Published base map service , Currently only supported 4326 and 3857 Slice map loading of coordinate system
let imageryProvider = new ArcGisMapServerImageryProvider({
url: "http://cache1.arcgisonline.cn/arcgis/rest/services/ChinaOnlineStreetPurplishBlue/MapServer",
})
//wmts service
/*let imageryProvider = new Cesium.WebMapTileServiceImageryProvider({ url: "http://t{s}.tianditu.com/img_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=img&tileMatrixSet=w&TileMatrix={TileMatrix}&TileRow={TileRow}&TileCol={TileCol}&style=default&format=tiles&tk=0911bd7d5242feed8ec0fa67f3d47afd", layer: "tdtBasicLayer", style: "default", format: "image/jpeg", tileMatrixSetID: "GoogleMapsCompatible", subdomains: ["0", "1", "2"] })*/
// Background map
/* let baseImagery = new Cesium.SingleTileImageryProvider({ url: "/imgs/home/world.jpg", });*/
let layer = viewer.imageryLayers.addImageryProvider(imageryProvider);
layer["lyr_ID"] = "baseImageLayerID";
layer["lyr_NAME"] = " Image basemap ";
}
Remove image
removeImagery() {
var _lyr = viewer.imageryLayers._layers.firstOrDefault(t => {
if (t.lyr_ID && t.lyr_ID == 'baseImageLayerID' && t.lyr_NAME && t.lyr_NAME == ' Image basemap ') {
return t; }
});
if (_lyr) viewer.imageryLayers.remove(_lyr, true);
}
Top image
TotopTiandituImageMap() {
var _lyr = viewer.imageryLayers._layers.firstOrDefault(t => {
if (t.lyr_ID && t.lyr_ID == 'baseImageLayerID' && t.lyr_NAME && t.lyr_NAME == ' Image basemap ') {
return t; }
});
if (_lyr) viewer.imageryLayers.raiseToTop(_lyr);
}
Load terrain （ There can only be one terrain service ）
Failure to load the terrain address will cause the sphere to be invisible
addTerrain() {
// load cesium Terrain data in
let terrainLayer = new Cesium.CesiumTerrainProvider({
url: "http://117.175.169.58:48002/",
requestVertexNormals: true,
requestWaterMask: true
});
//arcgis Published terrain data
/*let terrainLayer = new Cesium.ArcGISTiledElevationTerrainProvider({ url: "https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer", });*/
// Add a height of 0 The terrain of the city , cesium This terrain object is loaded by default
/*let terrainLayer = new Cesium.EllipsoidTerrainProvider()};*/
viewer.terrainProvider = terrainLayer
Remove terrain
removeTerrain() {
if (viewer.terrainProvider instanceof Cesium.EllipsoidTerrainProvider) {
return
} else {
viewer.terrainProvider = new Cesium.EllipsoidTerrainProvider();
}
}
load 3dtiles Model
addModel(){
// Prevent duplicate loading
let model = viewer.scene.primitives._primitives.filter(t => {
return t && t.id === '3dTilesModel1';
});
if (model.length) return;
let primitive = new Cesium.Cesium3DTileset({
url: 'http://117.175.169.58:48012/%E6%B5%81%E5%9F%9F%E5%AE%89%E5%85%A8%E6%B0%B4%E7%94%B5%E7%AB%99/tileset.json'
})
primitive["name"] = 'mainModel_3dtitles';
primitive["id"] = '3dTilesModel1';
viewer.scene.primitives.add(primitive);
primitive.readyPromise.then(function (argument) {
viewer.flyTo(argument);// Fly to the model
})
// Raise the model 0.5m
primitive.readyPromise.then(function(tileset) {
viewer.scene.primitives.add(tileset);
let boundingSphere = tileset.boundingSphere;
let cartographic = Cesium.Cartographic.fromCartesian(boundingSphere.center);
let surface = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 0.0);
let offset = Cesium.Cartesian3.fromRadians(cartographic.longitude, cartographic.latitude, 0.5);
let translation = Cesium.Cartesian3.subtract(offset, surface, new Cesium.Cartesian3());
tileset.modelMatrix = Cesium.Matrix4.fromTranslation(translation);
});
}
load glb,gltf Model
addModel() {
// Prevent duplicate loading
let model = viewer.scene.primitives._primitives.filter(t => {
return t && t.id === "gltfModel1";
});
if (model.length) return;
let position = Cesium.Cartesian3.fromDegrees(116.523753404617, 40.2340042591095, 0);
let hpRoll = new Cesium.HeadingPitchRoll(
Cesium.Math.toRadians(90),
0,
Cesium.Math.toRadians(0)
);
/*let m = Cesium.Transforms.eastNorthUpToFixedFrame( Cesium.Cartesian3.fromDegrees(116.523753404617, 40.2340042591095, 0) ); let m1 = Cesium.Matrix3.fromRotationZ(Cesium.Math.toRadians(-90)); Cesium.Matrix4.multiplyByMatrix3(m, m1, m); // Matrix computing */
let primitive = Cesium.Model.fromGltf({
url: "/model/home/mx.glb",
modelMatrix: Cesium.Transforms.headingPitchRollToFixedFrame(position, hpRoll),
//modelMatrix: m
});
primitive["name"] = 'mainModel_gltf';
primitive["id"] = 'gltfModel1';
viewer.scene.primitives.add(primitive)
// Fly to the model view
getViewer().camera.flyTo({
"destination": {
"x": -2177813.7852421473, "y": 4362755.897898611, "z": 4097937.821940227},
"orientation": {
"pitch": -0.5192370076293065, "heading": 4.733198787733471, "roll": 6.2793732598153}
});
}
Adjust the map color
let layer = viewer.imageryLayers.get(0)
// Layer brightness ,1.0 Use unmodified image colors . Less than 1.0 Will make the image darker , But more than 1.0 Will make the image brighter
layer.brightness = 1.0;
// Layer contrast ,1.0 Use unmodified image colors . Less than 1.0 Will reduce the contrast , Greater than 1.0 Will increase the contrast .
layer.contrast = 1.0;
// Layer saturation ,1.0 Use unmodified image colors . Less than 1.0 Will reduce the saturation , Greater than 1.0 Will increase saturation .
layer.saturation = 1.0;
// Layer hue , In radians ,0 Indicates to use the unmodified image color
layer.hue = 0;
// Gamma correction applied to this layer ,1.0 Use unmodified image colors .
layer.gamma = 1.0;
Set up ambient light
If the model shadow is displayed after setting the ambient light , Then the shadow direction is not controlled by time , With ambient light direction The direction shall prevail
viewer.scene.light = new Cesium.DirectionalLight({
direction: new Cesium.Cartesian3(1, -1, -1),// Direction
color: Cesium.Color.WHITE,// Color
intensity: 0.5 // Strength
});
following map_common_addDatasouce, jsonParse Method reference https://blog.csdn.net/weixin_39150852/article/details/119676613
Load icons and text labels
let data = [
{
id: '1',
name: ' camera 1',
coordinate: [116.5237896183484, 40.23425089061218, 1]
},
{
id: '2',
name: ' camera 2',
coordinate: [116.52442547004496, 40.234225534772044, 1]
},
{
id: '3',
name: ' camera 3',
coordinate: [116.52386941878123, 40.233503276564576, 1]
}
];
addPoints(data) {
if (data && data.length > 0) {
let datasource = map_common_addDatasouce("point");
datasource.entities.removeAll();
data.forEach(item => {
datasource.entities.add({
position: Cesium.Cartesian3.fromDegrees(item.coordinate[0], item.coordinate[1], item.coordinate[2]),// Icon position
billboard: {
image: `/images/marker.png`,// Icon address
horizontalOrigin: Cesium.HorizontalOrigin.LEFT,
verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
disableDepthTestDistance: Number.POSITIVE_INFINITY,
pixelOffset: new Cesium.Cartesian2(-6, 6),
scale: 0.8,
},
label: {
scale: 1,
font: "bolder 16px sans-serif",
style: Cesium.LabelStyle.FILL_AND_OUTLINE,
text: item.name,// Icon name
fillColor: Cesium.Color.fromCssColorString("#ffffff"),
pixelOffset: new Cesium.Cartesian2(0, -60)
},
properties: new Cesium.PropertyBag({
type: "point",
details: item
})
});
})
}
}
Load alarm point animation effect
let data = [
{
id: '1',
name: ' Alarm point 1',
coordinate: [116.52329742014058, 40.234779669561995, 1]
},
{
id: '2',
name: ' Alarm point 2',
coordinate: [116.5237795168529, 40.23282475084235, 1]
}
];
addWarnings(data) {
if (data && data.length > 0) {
let datasource = map_common_addDatasouce("warning");
datasource.entities.removeAll();
//let x = 1;
//let flog = true;
data.forEach(item => {
datasource.entities.add({
position: Cesium.Cartesian3.fromDegrees(item.coordinate[0], item.coordinate[1], item.coordinate[2]),
/* ellipse: { height: 35,// Height semiMinorAxis: 10,// Long half axis semiMajorAxis: 10,// Short half shaft // Hypergraph animation effect material: new Cesium.CircleWaveMaterialProperty({ duration: 1000,// Speed gradient: 0.5,// The gradient color: Cesium.Color.fromCssColorString("#f71a1a").withAlpha(0.2), count: 2 // Number }), },*/
// Flash animation is realized by dynamically changing the zoom size
billboard: {
image: `/images/marker.png`,
pixelOffset: new Cesium.Cartesian2(0, -50),
scale: new Cesium.CallbackProperty(function () {
if (flog) {
x = x - 0.03;
if (x <= 0.2) {
flog = false;
}
} else {
x = x + 0.03;
if (x >= 0.8) {
flog = true;
}
}
return x;
}, false)
}
properties: new Cesium.PropertyBag({
type: "warning",
details: item
})
});
})
}
}
Animation 1
Animation 2
Load line
let data = {
id: '1',
name: ' Border camp... Gaoli ',
rangerArr: [[116.52320712206836, 40.23406811024757, 5], [116.52321177601786, 40.23347668875855, 5], [116.52452838827061, 40.23347827970169, 5], [116.52453120516144, 40.23515431118559, 5], [116.52321855758989, 40.23407917327679, 5], [116.52320712206836, 40.23406811024757, 5]]
};
addLine(data) {
if (data && data.rangerArr && data.rangerArr.length > 0) {
let datasource = map_common_addDatasouce("line");
datasource.entities.removeAll();
let positions = Array.prototype.concat.apply(
[],
data.rangerArr
);
datasource.entities.add(
new Cesium.Entity({
polyline: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights(positions),
width: 5.0,
// Pure color
/* material: Cesium.Color.fromCssColorString("#73f9f0").withAlpha( 1.0 ),*/
// Glow effect
material: new Cesium.PolylineGlowMaterialProperty({
color: Cesium.Color.fromCssColorString("#fff"),
glowPower: 0.1
})
},
properties: new Cesium.PropertyBag({
type: "line",
details: data
})
})
);
}
}
Loading surface
let data = {
id: '1',
name: ' Koryo camp range ',
rangerArr: [[116.52320712206836, 40.23406811024757, 5], [116.52321177601786, 40.23347668875855, 5], [116.52452838827061, 40.23347827970169, 5], [116.52453120516144, 40.23515431118559, 5], [116.52321855758989, 40.23407917327679, 5], [116.52320712206836, 40.23406811024757, 5]]
};
addPoly(data) {
if (data && data.rangerArr && data.rangerArr.length > 0) {
let datasource = map_common_addDatasouce("poly");
datasource.entities.removeAll();
let positions = Array.prototype.concat.apply(
[],
data.rangerArr
);
let x = 1;
let flog = true
datasource.entities.add(
new Cesium.Entity({
polygon: {
height: 2000,
hierarchy: Cesium.Cartesian3.fromDegreesArrayHeights(positions),
// Pure color
/*material: Cesium.Color.fromCssColorString('73f9f0').withAlpha(1),*/
// picture
/*material: new Cesium.ImageMaterialProperty({ image: "/images/home/ The Beijing municipal .png", }),*/
// Flash animation by dynamically changing transparency
material: new Cesium.ColorMaterialProperty(
new Cesium.CallbackProperty(function () {
if (flog) {
x = x - 0.03;
if (x <= 0.2) {
flog = false;
}
} else {
x = x + 0.03;
if (x >= 0.8) {
flog = true;
}
}
return Cesium.Color.RED.withAlpha(x);
}, false)),
clampToS3M: true, // Face paste 3dTiles Model , if gltf Model , This parameter does not take effect , Then combine extrudedHeight and height Attribute pull into a body
outline: true,
outlineColor: Cesium.Color.fromCssColorString("#a2ffba"),
outlineWidth: 1.0,// Range face data settings outline by true when , The width can only be displayed 1px
// Control the height range of display and concealment
distanceDisplayCondition: new Cesium.DistanceDisplayCondition(
100000,
1000000.0
),
},
properties: new Cesium.PropertyBag({
type: "poly",
details: data
})
})
);
}
}
Load background image
loadCircle() {
let datasource = map_common_addDatasouce("circleImage");
datasource.entities.add({
position: Cesium.Cartesian3.fromDegrees(
93.97039653185051, 29.950970087104018, 4000
),
ellipse: {
height: 3000,
semiMajorAxis: 220000,
semiMinorAxis: 220000,
material: new Cesium.ImageMaterialProperty({
image: "/images/map/circle.png",
transparent: true,
color: new Cesium.Color(0.4, 0.4, 0.4, 0.8),
}),
stRotation: 0 // Rotation Angle
},
});
}
Load fence
/** * Color gradient */
getColorRamp(elevationRamp, isVertical = true) {
let ramp = document.createElement('canvas');
ramp.width = isVertical ? 1 : 100;
ramp.height = isVertical ? 100 : 1;
let ctx = ramp.getContext('2d');
let values = elevationRamp;
let grd = isVertical ? ctx.createLinearGradient(0, 0, 0, 100) : ctx.createLinearGradient(0, 0, 100, 0);
grd.addColorStop(values[0], 'rgba(22,35,64,1)');
grd.addColorStop(values[1], 'rgba(49,67,71,1)');
grd.addColorStop(values[2], 'rgba(22,35,64,1)');
grd.addColorStop(values[3], 'rgba(49,67,71,1)');
grd.addColorStop(values[4], 'rgba(22,35,64,1)');
grd.addColorStop(values[5], 'rgba(49,67,71,1)');
ctx.globalAlpha = 0.3;
ctx.fillStyle = grd;
if (isVertical)
ctx.fillRect(0, 0, 1, 100);
else
ctx.fillRect(0, 0, 100, 1);
return ramp;
}
let data = {
id: '1',
name: ' Gaoliying electronic fence ',
rangerArr: [[116.52320712206836, 40.23406811024757, 20], [116.52321177601786, 40.23347668875855, 20], [116.52452838827061, 40.23347827970169, 20], [116.52453120516144, 40.23515431118559, 20], [116.52321855758989, 40.23407917327679, 20], [116.52320712206836, 40.23406811024757, 20]]
};
addWall(data) {
if (data && data.rangerArr && data.rangerArr.length > 0) {
let datasource = map_common_addDatasouce("wall");
datasource.entities.removeAll();
let positions = Array.prototype.concat.apply(
[],
data.rangerArr
);
datasource.entities.add(
new Cesium.Entity({
wall: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights(positions),
material: new Cesium.ImageMaterialProperty({
// Customize
image: getColorRamp([0.0, 0.2, 0.4, 0.6, 0.8, 1.0], true,"county_border_line"),
// Pure color
/*color: Cesium.Color.fromCssColorString('#faff12').withAlpha(0.3)*/
// picture
/*image: "/imgs/home/ Group .png", repeat: new Cesium.Cartesian2(1.0, 1), transparent: true*/
}),
outline: false,
},
properties: new Cesium.PropertyBag({
type: "wall",
details: data
})
})
);
}
}
Loading surface + The fence realizes three-dimensional layered effect
/** * Load Beijing area */
function mapView_BeiJing() {
jsonParse("/json/home/ The Beijing municipal .json").then((val) => {
if (val && val.length > 0) {
let datasource = map_common_addDatasouce(datasourceName.BEIJING_DATASOURCE);
val.forEach((el) => {
let positions = Array.prototype.concat.apply(
[],
el.geometry.coordinates[0]
);
datasource.entities.add({
polygon: {
hierarchy: Cesium.Cartesian3.fromDegreesArray(positions),
height: 4000,
material: new Cesium.ImageMaterialProperty({
image: "/imgs/home/ The Beijing municipal .png",
}),
outline: false
}
});
let positions2 = el.geometry.coordinates[0].map(item => {
item.push(initHeight);
return item
})
let positions3 = Array.prototype.concat.apply(
[],
positions2
);
datasource.entities.add({
wall: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights(positions3),
material: new Cesium.ImageMaterialProperty({
image: "/imgs/home/ Group .png",
repeat: new Cesium.Cartesian2(1.0, 1),
transparent: true,
}),
outline: false
},
});
});
}
});
}
picture ：
effect ：
Load gradient cylinder
/** * Color gradient */
getColorRamp(elevationRamp, isVertical = true) {
let ramp = document.createElement('canvas');
ramp.width = isVertical ? 1 : 100;
ramp.height = isVertical ? 100 : 1;
let ctx = ramp.getContext('2d');
let values = elevationRamp;
let grd = isVertical ? ctx.createLinearGradient(0, 0, 0, 100) : ctx.createLinearGradient(0, 0, 100, 0);
grd.addColorStop(values[0], '#0084FF');
grd.addColorStop(values[1], '#00FCFF');
grd.addColorStop(values[2], '#00FF7E');
ctx.globalAlpha = 0.3;
ctx.fillStyle = grd;
if (isVertical)
ctx.fillRect(0, 0, 1, 100);
else
ctx.fillRect(0, 0, 100, 1);
return ramp;
}
let data = [
{
id: '1',
name: ' Rainfall column 1',
coordinate: [116.5237896183484, 40.23425089061218],
rainValue: 14000
},
{
id: '2',
name: ' Rainfall column 2',
coordinate: [116.52442547004496, 40.234225534772044],
rainValue: 11000
},
{
id: '3',
name: ' Rainfall column 3',
coordinate: [116.52386941878123, 40.233503276564576],
rainValue: 8000
}
];
addCylinder(data) {
if (data && data.length > 0) {
let datasource = map_common_addDatasouce("point");
datasource.entities.removeAll();
data.forEach(item => {
let center = item.coordinates;
let radius = 1;// radius
let options = {
steps: 64, units: 'kilometers', properties: {
foo: 'bar'}};
// introduce turf Build a range surface
//import circle from '@turf/circle';
let circleData = circle(center, radius, options);
let height = item.rainValue;// Height
let wallPositions = circleData.geometry.coordinates[0].map(item => {
return [...item, height]
});
let positions = Array.prototype.concat.apply(
[],
wallPositions
);
// Gradient filling is realized through the enclosure
datasource.entities.add({
wall: {
positions: Cesium.Cartesian3.fromDegreesArrayHeights(positions),
material: new Cesium.ImageMaterialProperty({
image: getColorRamp([0.1, 0.5, 1.0], true, "county_border_line"),
repeat: new Cesium.Cartesian2(1.0, 1),
transparent: false,
}),
minimumHeights: wallPositions.map(() => 10500),
outline: false,
}
});
// Fill solid color fence
datasource.entities.add({
position: Cesium.Cartesian3.fromDegrees(item.coordinates[0], item.coordinates[1], 10500),
cylinder: {
length: height - 10500,
heightReference: Cesium.HeightReference.RELATIVE_TO_GROUND,
topRadius: 990,
bottomRadius: 990,
material: Cesium.Color.fromCssColorString('#0077AF'),
outline: false
}
})
})
}
}
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