cesium 漫游飞行_cesium之三维漫游飞行效果实现篇

实现Cesium的三维漫游飞行效果可以通过以下步骤实现：

1. 创建一个Cesium Viewer对象：

var viewer = new Cesium.Viewer('cesiumContainer');

2. 通过Camera控制视角和位置：

viewer.camera.setView({
    destination: Cesium.Cartesian3.fromDegrees(longitude, latitude, height),
    orientation: {
        heading: Cesium.Math.toRadians(heading),
        pitch: Cesium.Math.toRadians(pitch),
        roll: Cesium.Math.toRadians(roll)
    }
});

3. 为视角添加动画效果：

var duration = 5.0; // 动画时间，单位为秒
Cesium.CameraFlightPath.createAnimationCartographic(viewer.scene, {
    destination: Cesium.Cartographic.fromDegrees(longitude, latitude, height),
    orientation: {
        heading: Cesium.Math.toRadians(heading),
        pitch: Cesium.Math.toRadians(pitch),
        roll: Cesium.Math.toRadians(roll)
    },
    duration: duration
});

4. 添加键盘和鼠标事件：

// 飞行到指定位置
function flyTo(longitude, latitude, height, heading, pitch, roll) {
    viewer.camera.flyTo({
        destination: Cesium.Cartesian3.fromDegrees(longitude, latitude, height),
        orientation: {
            heading: Cesium.Math.toRadians(heading),
            pitch: Cesium.Math.toRadians(pitch),
            roll: Cesium.Math.toRadians(roll)
        }
    });
}

// 监听键盘和鼠标事件
document.addEventListener('keydown', function(event) {
    switch (event.keyCode) {
        case 87: // W
            viewer.camera.moveForward(1000.0);
            break;
        case 83: // S
            viewer.camera.moveBackward(1000.0);
            break;
        case 65: // A
            viewer.camera.moveLeft(1000.0);
            break;
        case 68: // D
            viewer.camera.moveRight(1000.0);
            break;
        case 38: // Up arrow
            viewer.camera.lookUp(0.1);
            break;
        case 40: // Down arrow
            viewer.camera.lookDown(0.1);
            break;
        case 37: // Left arrow
            viewer.camera.lookLeft(0.1);
            break;
        case 39: // Right arrow
            viewer.camera.lookRight(0.1);
            break;
        default:
            return;
    }
    event.preventDefault();
}, false);

通过以上步骤，即可实现Cesium的三维漫游飞行效果。