路径-室内漫游的2个路径数据？

[liyihongcug]

pathPositions
pathRotations

"ref": "path",
"czmObject": {
"xbsjType": "Path",
"xbsjGuid": "8e547cc4-1a3f-4a9c-b569-a62c92290851",
"name": "Path路径属性窗口",
"positions": pathPositions,
"rotations": pathRotations,

能否解释下 rotations干啥用的？ 是否相机使用的？
如果能解释path是如何实现的吗 ，感觉不是czml

[vtxf]

rotations是每个关键点上的朝向，默认[0, 0, 0], 朝东平视，是绑定的相机或者物体使用的；
和czml没有关系。

[liyihongcug]

早上也刚弄明白这个知识点
代码 XbsjEarthv1.4.27/Apps/Examples/?menu=true&url=./earth-path-fly.html
"positions": [
[
1.9016746584889261,
0.5972140444354529,
540.3422462577171
],
[
1.9017267341518718,
0.5972133503414322,
520.1137699152557
],
[
1.9017257997179968,
0.5972736030398242,
528.3876170108886
],
[
1.9016747349263112,
0.5972754003153069,
521.087861389408
]
],
"rotations": [
[
6.868275118748086,
-0.2742692911775144,
0.0016584301080495578
],
[
5.703866308921896,
-0.19385405041989068,
6.281509509407803
],
[
3.8005195675504133,
-0.2597408290639396,
6.281339310424716
],
[
2.501667530825695,
-0.2173829253288364,
0.001819016773946025
]
],
这里很困惑，官方cesium例子里 是不用管相机的rotations的（参考最后的官方的代码）
能大致解释下你做的飞行 Position 和 rotation如何关联使用的吗， 如果能贴代码解释可能更好？
（另外确认一下，你用的是一个相机还是 用了主副两个相机）

我找出的官方飞行代码如下：
function computeCirclularFlight(lon, lat, radius) {
var property = new Cesium.SampledPositionProperty();
for (var i = 0; i <= 360; i += 45) {
var radians = Cesium.Math.toRadians(i);
var time = Cesium.JulianDate.addSeconds(
start,
i,
new Cesium.JulianDate()
);
var position = Cesium.Cartesian3.fromDegrees(
lon + radius * 1.5 * Math.cos(radians),
lat + radius * Math.sin(radians),
Cesium.Math.nextRandomNumber() * 500 + 1750
);
property.addSample(time, position);
//Also create a point for each sample we generate.
viewer.entities.add({
position: position,
point: {
pixelSize: 8,
color: Cesium.Color.TRANSPARENT,
outlineColor: Cesium.Color.YELLOW,
outlineWidth: 3,
},
});
}
return property;
}
//Compute the entity position property.
var position = computeCirclularFlight(-112.110693, 36.0994841, 0.03);
//Actually create the entity
var entity = viewer.entities.add({
//Set the entity availability to the same interval as the simulation time.
availability: new Cesium.TimeIntervalCollection([
new Cesium.TimeInterval({
start: start,
stop: stop,
}),
]),
//Use our computed positions
position: position,
//Automatically compute orientation based on position movement.
orientation: new Cesium.VelocityOrientationProperty(position),
//Load the Cesium plane model to represent the entity
model: {
uri: "Cesium_Air.glb",
minimumPixelSize: 64,
},
//Show the path as a pink line sampled in 1 second increments.
path: {
resolution: 1,
material: new Cesium.PolylineGlowMaterialProperty({
glowPower: 0.1,
color: Cesium.Color.YELLOW,
}),
width: 10,
},
});

[liyihongcug]

function setRoamView() {
if (flyEntity) {
const center = flyEntity.position.getValue(viewer.clock.currentTime)
if (center) {
const vector = new Cesium.Cartesian3(target.x - center.x, target.y - center.y, 500)
viewer.camera.lookAt(center, vector)
}
}
}
viewer.scene.preUpdate.addEventListener(setRoamView) // 我使用preUpdate.addEventListener(setRoamView)
实现相同的功能但发现镜头无法鼠标切换，相机镜头能始终朝向大雁塔，但还是应该如例子一样鼠标能改变镜头

[liyihongcug]

假期的努力没有白费，搞定了. viewer.scene.camera.setView({
destination: endPosition,
orientation: {
heading: heading,
pitch: pitch,
}
}); 可以解决这个问题