CesiumJS
- 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）
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CesiumJS 官网：https://www.cesium.com/
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CesiumJS 下载地址：https://www.cesium.com/platform/cesiumjs/
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CesiumJS API 文档：https://cesium.com/learn/cesiumjs/ref-doc/index.html
一、监听鼠标滚轮
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>ScreenSpaceEventHandler - 监听鼠标滚轮</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 handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);handler.setInputAction((delta) => {console.log("滚动量为：", delta);}, Cesium.ScreenSpaceEventType.WHEEL);</script>
</html>
二、监听鼠标左键按下与松开
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>ScreenSpaceEventHandler - 监听鼠标左键按下与松开</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 handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);handler.setInputAction((click) => {console.log("鼠标左键按下了！！！位置为：", click.position.x, click.position.y);}, Cesium.ScreenSpaceEventType.LEFT_DOWN);handler.setInputAction((click) => {console.log("鼠标左键松开了，位置为：", click.position.x, click.position.y);}, Cesium.ScreenSpaceEventType.LEFT_UP);</script>
</html>
三、监听鼠标右键按下与松开
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>ScreenSpaceEventHandler - 监听鼠标右键按下与松开</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 handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);handler.setInputAction((click) => {console.log("鼠标右键按下了！！！位置为：", click.position.x, click.position.y);}, Cesium.ScreenSpaceEventType.RIGHT_DOWN);handler.setInputAction((click) => {console.log("鼠标右键松开了，位置为：", click.position.x, click.position.y);}, Cesium.ScreenSpaceEventType.RIGHT_UP);</script>
</html>
四、监听鼠标左击落点
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>ScreenSpaceEventHandler - 监听鼠标左击落点</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 handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);handler.setInputAction(function (click) {// 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("左击落点在地球球面，地理坐标为：", Cesium.Math.toDegrees(cartographic.longitude), Cesium.Math.toDegrees(cartographic.latitude));} else {console.log("左击落点不在地球球面");}}, Cesium.ScreenSpaceEventType.LEFT_CLICK);</script>
</html>
