The technical route is based on UE4 for secondary development

technology roadmap

be based on UE4 Secondary development . The general technical route used is as follows ：

1、 be based on Visual Dataprep Data preprocessing of , Can handle mainstream model data formats （Fbx,Obj,Revit,Dwg,IFC wait ）, Import to UE4

https://docs.unrealengine.com/zh-CN/Engine/Content/Importing/Dataprep/index.html

2、 be based on Hlod Automatic degradation of model for , You can automatically switch the displayed model details through the distance

https://docs.unrealengine.com/zh-CN/Engine/HLOD/index.html

3、 Dynamic loading based on level flow , Realize the dynamic loading and unloading of the model , The actual memory consumption is greatly reduced

https://docs.unrealengine.com/zh-CN/Engine/LevelStreaming/index.html

4、 be based on WebRtc The front end of the background rendering of

https://docs.unrealengine.com/zh-CN/Platforms/PixelStreaming/PixelStreamingOverview/index.html

The intermediate agreement is webrtc agreement , It can run 3D applications on poor machines .

********************************************** The technical problem of building the ball *****************************

1、 Is the data of the ball the tile data of the map

2、 Is the ball dynamically loaded according to the tile level

3、 The coordinate system above the sphere is