CesiumJS 案例 P13：删除标记、移动标记、标记点击事件

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、删除标记

html 复制代码

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Billboard - 删除标记</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;
			}
		</style>
	</head>

	<body>
		<div id="container"></div>
		<button class="btn-remove-marker">删除标记</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");

		btnRemoveMarker.addEventListener("click", () => {
			billboards.remove(billboard);
		});
	</script>
</html>

二、移动标记

html 复制代码

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Billboard - 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%;
			}

			.btn-move-marker {
				position: fixed;
				left: 0px;
				top: 0px;
			}
		</style>
	</head>

	<body>
		<div id="container"></div>
		<button class="btn-move-marker">移动标记</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 btnMoveMarker = document.querySelector(".btn-move-marker");

		btnMoveMarker.addEventListener("click", () => {
			billboard.position = Cesium.Cartesian3.fromDegrees(-75.59777, 50.03883);
		});
	</script>
</html>

三、标记点击事件

html 复制代码

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Billboard - 标记点击事件</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,
        });

        viewer.screenSpaceEventHandler.setInputAction((movement) => {
            const pickedObject = viewer.scene.pick(movement.position);
            if (Cesium.defined(pickedObject) && pickedObject.id === "billboard-test") {
                console.log("点击了标记！！！");
            } else {
                console.log("未点击标记");
            }
        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);
    </script>
</html>