CesiumJS
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CesiumJS API：https://cesium.com/learn/cesiumjs/ref-doc/index.html
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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>
