【解决办法】在鼠标点击事件注册时,绑定转换获取笛卡尔坐标:
var handler = new SuperMap3D.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function (e) {
scene.pickPositionAsync(e.position).then((position) => {
console.log(position);
})
}, SuperMap3D.ScreenSpaceEventType.LEFT_CLICK);