CesiumJS 案例 P19：添加矩形、监听鼠标左击、监听鼠标右击、监听鼠标移动

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、添加矩形

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>RectangleGraphics - 添加矩形</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 west = 0; // 西经（西经为负）
        const south = 0; // 南纬（南纬为负）
        const east = 10; // 东经（东经为正）
        const north = 10; // 北纬（北纬为正）

        // 添加矩形
        const rectangle = viewer.entities.add({
            rectangle: {
                coordinates: Cesium.Rectangle.fromDegrees(west, south, east, north),
                material: Cesium.Color.BLUE.withAlpha(0.5), // 半透明的蓝色
            },
        });
    </script>
</html>

---

二、监听鼠标左击

<!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</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("点击位置为：", click.position.x, click.position.y);
        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
    </script>
</html>

---

三、监听鼠标右击

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>ScreenSpaceEventHandler - 监听鼠标右击</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("点击位置为：", click.position.x, click.position.y);
        }, Cesium.ScreenSpaceEventType.RIGHT_CLICK);
    </script>
</html>

---

四、监听鼠标移动

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>ScreenSpaceEventHandler - 监听鼠标移动</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);

        // 原点为左上角
        // 原点往右为 X 轴正方向
        // 原点往下为 Y 轴正方向

        handler.setInputAction((movement) => {
            console.log("移动位置为：", movement.endPosition.x, movement.endPosition.y);
        }, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
    </script>
</html>