1.根据第一点、距离、角度计算第二点
function secPoint(jd, wd, radius, heading){
let m = Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegress(jd, wd));
let rx = radius * Math.cos(heading * Math.PI / 180.0);
let ry = radius * Math.sin(heading * Math.PI / 180.0);
let translation = Cesium.Cartesian3.fromElements(rx, ry, 0);
let d = Cesium.Matrix4.multiplyByPoint(m, translation, new Cesium.Cartesian3());
let c = Cesium.Cartographic.fromCartesian(d);
let x1 = Cesium.Math.toDegrees(c.longitude);
let y1 = Cesium.Math.toDegrees(c.latitude);
return computeFlight(jd, wd, x1, y1, 0, 90);
}
2.根据两个点、开始角度、夹角、求立面的扇形
function compu