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