几个关键点:
1. 烟花的火花颜色,大小,位置这三个变量。
2. 烟花飞出的方向:只向上。
3. 烟花的颜色:烟花也就是GeoLine(地理线)一共设置了三种颜色:黄、紫、蓝。
4. 线生长循环开启,烟花会在数字孪生可视化地图上循环出现。
代码如下:
- var app = new THING.App();
- // 设置app背景为黑色
- app.background = [0, 0, 0];
-
- var thingLayer = app.create({
- type: "ThingLayer",
- name: "thingLayer01"
- });
-
- // 引用地图组件脚本
- THING.Utils.dynamicLoad(["https://www.thingjs.com/uearth/uearth.min.js"], function () {
- app.create({
- type: "Map",
- url: 'https://www.thingjs.com/citybuilder_console/mapProject/config/TVRFek5ETTRDaXR5QnVpbGRlckAyMDE5',
- complete: function (event) {
- var building = app.query(/建筑/)[0].data.features;
- var points1 = app.query(/旅游/)[0].data.features;
- var points2 = app.query(/医疗服务/)[0].data.features;
- var points3 = app.query(/大型购物广场/)[0].data.features;
- var newPoints2 = points2.filter((i, index) => index % 10 == 0);
-
- createBuilding(building, 'building')
- createMeshLine(points1, "#FF9933FF");
- createMeshLine(newPoints2, "#FF00FFFF");
- createMeshLine(points3, "#00CCFFFF");
- }
- });
- });
-
- /**
- * 创建GeoBuilding
- */
- function createBuilding(building, name) {
- building.map(item => {
- var coordinates = item.geometry.coordinates;
- var height = item.properties.height;
- var building = app.create({
- type: "GeoBuilding",
- name: name,
- coordinates, // 支持Polygon和MultiPolygon,格式可参考geoJson规范
- height: height,
- renderer: {
- type: 'vector',
- color: [61, 63, 70],// 面填充颜色
- opacity: 1, // 填充不透明度
- }
- });
- thingLayer.add(building);
- })
- }
-
- /**
- * 创建GeoLine
- */
- function createMeshLine(points, color) {
- points.map(item => {
- var height = Math.random() * 2000 + 3000;
- var geoLine = app.create({
- type: 'GeoLine',
- name: color,
- coordinates: [item.geometry.coordinates, item.geometry.coordinates],
- heightArray: [0, height * 0.1],
- // userData: { 'name': '花家地南街' },
- renderer: {
- type: 'vector', //GeoLine渲染类型 支持纯色(vector)和贴图(image)两种模式
- lineType: 'Line', //可以是Line Plane Pipe Route
- // imageUrl: 'https://www.thingjs.com/citybuilder_console/upload/lineIcons/3d/lightFlow_strip05.png',//线的贴图url, type是image时生效
- // color: [255, 255, 255], //线的颜色, type是vector时生效
- colorMapping: {
- 0: "#00000000",
- 0.7: "#33333300",
- 0.8: "#333333FF",
- 1: color,
- },
- // effect: true, //是否开启发光特效
- // width: 10, //只在线类型为Plane,Pipe下生效,代表线的宽度
- // numPass: 0.5, // 通道数,在贴图时贴图叠加的次数,次数越多颜色越亮,type是image时生效
- speed: 0.4, //线贴图流动速度,默认是0,不流动 speed可以大于0也可以小于0,代表流动方向
- // growSpeed: 0.4, //线生长速度,默认是0,不生长,lineType是Line,Plane时生效
- // growLoop: true //线生长是否循环,默认是true,lineType是Line,Plane时生效
- }
- });
- thingLayer.add(geoLine);
- })
- }
最后就可以在数字孪生可视化地图上发射烟花了。本文分享了自己是如何实现在数字孪生可视化地图上产生烟花效果的,同时祝大家天天有精彩!
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