cesium获取当前点击位置坐标

cesium获取点击位置坐标

方式一：

let handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
  handler.setInputAction(function (movement) {
  var cartesian = viewer.camera.pickEllipsoid(
      movement.position,
      viewer.scene.globe.ellipsoid
   );
  var cartographic = Cesium.Cartographic.fromCartesian(cartesian);
  console.log('lng',Cesium.Math.toDegrees(cartographic.longitude))
  console.log('lat',Cesium.Math.toDegrees(cartographic.latitude))
},Cesium.ScreenSpaceEventType.LEFT_CLICK)

该方式无法获取点的高度。所以在绘制Entity时，Entity贴地需要设置heightReference: Cesium.HeightReference.CLAMP_TO_GROUND 。

const pinBuilder = new Cesium.PinBuilder();
var currEntity = new Cesium.Entity({
        id: "current",
        position: position,
        billboard: {
          image: pinBuilder.fromText("点", Cesium.Color.BLUE, 48).toDataURL(),
          verticalOrigin: Cesium.VerticalOrigin.BOTTOM,
          scale: 0.8,
          heightReference: Cesium.HeightReference.CLAMP_TO_GROUND 
        },
 });
viewer.entities.add(currEntity);

而且即便设置了贴地，点击位置和绘制Entity的位置还是会出现不一致情况。如需在点击位置绘制，需要使用以下方式二。

方式二

let handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);
handler.setInputAction(function (movement) {
  var ray=viewer.camera.getPickRay(movement.position);
  var cartesian= viewer.scene.globe.pick(ray, viewer.scene);
  var cartographic = Cesium.Cartographic.fromCartesian(cartesian);
  console.log('lng',Cesium.Math.toDegrees(cartographic.longitude))
  console.log('lat',Cesium.Math.toDegrees(cartographic.latitude))
  console.log('height',cartographic.height)
},Cesium.ScreenSpaceEventType.LEFT_CLICK)
//在绘制entity时也不需要使用贴地了