暂停/停止/继续车辆移动实体

Question

如何通过调用另一个函数来暂停/停止车辆移动实体(阻止车辆移动(？似乎无法使用viewModel.pauseViewModel.command();。如果有人能示范如何提供暂停，请表示感谢；继续移动实体。

function togglesimulation() {

Cesium.Math.setRandomNumberSeed(3);

var start = Cesium.JulianDate.fromDate(new Date(2021, 6, 29, 16));
var stop = Cesium.JulianDate.addSeconds(start, 300, new Cesium.JulianDate);
//Make sure viewer is at the desired time.
var clock = new Cesium.Clock();
viewer.clock.startTime = start.clone();
viewer.clock.stopTime = stop.clone();
viewer.clock.currentTime = start.clone();
viewer.clock.clockRange = Cesium.ClockRange.CLAMPED; // stop at the end
viewer.clock.multiplier = clockmultiplier;
viewer.clock.shouldAnimate = true;

var position = new Cesium.SampledPositionProperty();
var time = Cesium.JulianDate.addSeconds(start, 120, new Cesium.JulianDate());
var timeStepInSeconds = 5;
var newPositions = mergedgeom1;

for (var i = 0; i < newPositions.length; i++) {
var poss = Cesium.Cartesian3.fromDegrees(parseFloat(newPositions[i][0]), parseFloat(newPositions[i][1])); //height
var time = Cesium.JulianDate.addSeconds(start, i * timeStepInSeconds, new Cesium.JulianDate());

position.addSample(time, poss);
}

var entity = viewer.entities.add({
availability: new Cesium.TimeIntervalCollection([
new Cesium.TimeInterval({
start: start,
stop: stop,
}),
]),
model: {
uri: "../asset/vehicle/CesiumMilkTruck/CesiumMilkTruck.glb",
minimumPixelSize: 64,
},
viewFrom: new Cesium.Cartesian3(-100.0, 0.0, 100.0),
position: position,
orientation: new Cesium.VelocityOrientationProperty(position),
});
viewer.trackedEntity = entity;
var scene = viewer.scene;
}

Answer 1

使用暂停时钟

viewer.clock.shouldAnimate = false;

您可以稍后使用以下命令取消暂停：

viewer.clock.shouldAnimate = true;