viewpoint.js
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import objectManage from './maputils';
export default class viewpoint {
constructor() {
console.log(Cesium.Sightline);
this.sightline = new Cesium.Sightline(objectManage.viewer.scene);
this.sightline.couldRemove = false;
this.sightline.build();
this.handlerPoint = new Cesium.DrawHandler(objectManage.viewer, Cesium.DrawMode.Point);
this.handlerPoint.drawEvt.addEventListener(result => {
var point = result.object;
point.show = false;
var position = result.object.position;
//将获取的点的位置转化成经纬度
var cartographic = Cesium.Cartographic.fromCartesian(position);
var longitude = Cesium.Math.toDegrees(cartographic.longitude);
var latitude = Cesium.Math.toDegrees(cartographic.latitude);
var height = cartographic.height;
if(objectManage.viewer.scene.viewFlag) {
this.sightline.viewPosition = [longitude, latitude, height];
objectManage.viewer.scene.viewFlag = false;
this.addPoint();
}else {
this.sightline.addTargetPoint({
position : [longitude, latitude, height],
name : "point" + new Date()
});
this.sightline.couldRemove = true;
}
});
}
chooseView() {
if(this.handlerPoint.active) return;
objectManage.viewer.scene.viewFlag = true;
objectManage.viewer.entities.removeAll();
this.sightline.removeAllTargetPoint();
this.handlerPoint.activate();
}
addPoint() {
objectManage.viewer.scene.viewFlag = false;
this.handlerPoint.activate();
}
}