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CesiumJS 案例 P15：检测标记、鼠标点击移动标记、鼠标拖动标记

news 2025/7/29 20:24:11

CesiumJS

CesiumJS API：https://cesium.com/learn/cesiumjs/ref-doc/index.html
CesiumJS 是一个开源的 JavaScript 库，它用于在网页中创建和控制 3D 地球仪（地图）

一、检测标记

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Billboard - 检测标记</title><link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" /><style>* {margin: 0;padding: 0;box-sizing: border-box;}html,body {width: 100%;height: 100%;}.container {width: 100%;height: 100%;}.btn-remove-marker {position: fixed;left: 0px;top: 0px;}.btn-check-marker {position: fixed;left: 0px;top: 50px;}</style></head><body><div id="container"></div><button class="btn-remove-marker">删除标记</button><button class="btn-check-marker">检测标记</button></body><script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script><script>const viewer = new Cesium.Viewer("container");const billboards = viewer.scene.primitives.add(new Cesium.BillboardCollection());const billboard = billboards.add({image: "../img/marker-icon.png",position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),verticalOrigin: Cesium.VerticalOrigin.BOTTOM,});const btnRemoveMarker = document.querySelector(".btn-remove-marker");const btnCheckMarker = document.querySelector(".btn-check-marker");btnRemoveMarker.addEventListener("click", () => {billboards.remove(billboard);});btnCheckMarker.addEventListener("click", () => {console.log(billboards.contains(billboard));});</script>
</html>

二、鼠标点击移动标记

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Billboard - 鼠标点击移动标记</title><link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" /><style>* {margin: 0;padding: 0;box-sizing: border-box;}html,body {width: 100%;height: 100%;}.container {width: 100%;height: 100%;}</style></head><body><div id="container"></div></body><script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script><script>const viewer = new Cesium.Viewer("container");const billboards = viewer.scene.primitives.add(new Cesium.BillboardCollection());const billboard = billboards.add({id: "billboard-test",image: "../img/marker-icon.png",position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),verticalOrigin: Cesium.VerticalOrigin.BOTTOM,});let isSelect = false;viewer.screenSpaceEventHandler.setInputAction((click) => {if (isSelect) {// 获取左击位置的射线const pickRay = viewer.camera.getPickRay(click.position);// 在地球表面找到与射线相交的点const pickPosition = viewer.scene.globe.pick(pickRay, viewer.scene);if (Cesium.defined(pickPosition)) {// 如果找到了交点，将其转换为地理弧度坐标（Cartographic）const cartographic = Cesium.Ellipsoid.WGS84.cartesianToCartographic(pickPosition);// 这里转换成直观的地理度数坐标console.log("落点在地球球面，地理坐标为：", Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude));// 将地理弧度坐标（Cartographic）转换为笛卡尔坐标（Cartesian3）const cartesian3 = Cesium.Ellipsoid.WGS84.cartographicToCartesian(cartographic);billboard.position = cartesian3;} else {console.log("落点不在地球球面");alert("落点不在地球球面，请重新操作");}isSelect = false;return;}const pickedObject = viewer.scene.pick(click.position);if (Cesium.defined(pickedObject) && pickedObject.id === "billboard-test") {console.log("点击了标记！！！");isSelect = true;} else {console.log("未点击标记");}}, Cesium.ScreenSpaceEventType.LEFT_CLICK);</script>
</html>

三、鼠标拖动标记

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Billboard - 鼠标拖动标记</title><link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" /><style>* {margin: 0;padding: 0;box-sizing: border-box;}html,body {width: 100%;height: 100%;}.container {width: 100%;height: 100%;}</style></head><body><div id="container"></div></body><script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script><script>const viewer = new Cesium.Viewer("container");const billboards = viewer.scene.primitives.add(new Cesium.BillboardCollection());const billboard = billboards.add({id: "billboard-test",image: "../img/marker-icon.png",position: Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),verticalOrigin: Cesium.VerticalOrigin.BOTTOM,});let isSelect = false;let originPositon;viewer.screenSpaceEventHandler.setInputAction((click) => {if (isSelect) {// 获取左击位置的射线const pickRay = viewer.camera.getPickRay(click.position);// 在地球表面找到与射线相交的点const pickPosition = viewer.scene.globe.pick(pickRay, viewer.scene);if (Cesium.defined(pickPosition)) {// 如果找到了交点，将其转换为地理弧度坐标（Cartographic）const cartographic = Cesium.Ellipsoid.WGS84.cartesianToCartographic(pickPosition);// 这里转换成直观的地理度数坐标console.log("落点在地球球面，地理坐标为：", Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude));// 将地理弧度坐标（Cartographic）转换为笛卡尔坐标（Cartesian3）const cartesian3 = Cesium.Ellipsoid.WGS84.cartographicToCartesian(cartographic);billboard.position = cartesian3;} else {console.log("落点不在地球球面");alert("落点不在地球球面，请重新操作");billboard.position = originPositon;}isSelect = false;return;}const pickedObject = viewer.scene.pick(click.position);if (Cesium.defined(pickedObject) && pickedObject.id === "billboard-test") {console.log("点击了标记！！！");isSelect = true;originPositon = billboard.position.clone();} else {console.log("未点击标记");}}, Cesium.ScreenSpaceEventType.LEFT_CLICK);viewer.screenSpaceEventHandler.setInputAction((movement) => {if (!isSelect) return;const pickRay = viewer.camera.getPickRay(movement.endPosition);const pickPosition = viewer.scene.globe.pick(pickRay, viewer.scene);if (Cesium.defined(pickPosition)) {const cartographic = Cesium.Ellipsoid.WGS84.cartesianToCartographic(pickPosition);console.log("移动位置在地球球面，地理坐标为：", Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude));const cartesian3 = Cesium.Ellipsoid.WGS84.cartographicToCartesian(cartographic);billboard.position = cartesian3;} else {console.log("移动位置不在地球球面");alert("移动位置不在地球球面，请重新操作");billboard.position = originPositon;isSelect = false;}}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);</script>
</html>