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![header](header.png "Header image: 37.793647, -122.398938")
This is an attempt to reverse-engineer undocumented parts of Google Earth. Main goal is to document the results and to provide code that emerges.
#### Earth to OBJ file downloader
We can dump a textured 3D model (*.obj with *.bmp and *.jpg) using these scripts. They require [Node.js](https://nodejs.org/en/) v8 with [npm](https://www.npmjs.com/):
We can dump a textured 3D model (*.obj with *.bmp and *.jpg) using the following scripts. They require [Node.js](https://nodejs.org/en/) v8 and [npm](https://www.npmjs.com/):
```sh
# Install dependencies (tested with node@8.15.0, npm@6.4.1)
npm install
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```
Exported files will be in `./downloaded_files/obj`. They can be opened in Blender [like this](BLENDER.md).
#### Notes for developers:
#### Notes
Alternative method for finding octant: [Open maps and dev tools, switch to satellite, fly to destination, search for NodeData, copy octant path from recent request](how_to_find_octant.jpg)
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- Oriented Bounding Box
- Dump OBB to obj: https://gist.github.com/retroplasma/5698808bfaa63ffd03f751a84fa6ce14
- Latlong to octant using OBB (unstable): https://github.com/retroplasma/earth-reverse-engineering/blob/443a3622ce9cb12cd4460cc6dc7999cc703ae67f/experimental_latlong_to_octant.js
TODO:
- Efficient level of detail and frustum culling (combination of octants, OBB, BVH?)
```
Related ideas: [Racing game](https://www.reddit.com/r/Showerthoughts/comments/aex25s/race_car_video_games_could_be_amazing_if_they/) , [Minimal client](https://github.com/kaylathedev/google-maps-3d-client). WebGL + CORS should work ([test](https://retroplasma.github.io/get_planetoid_metadata.html)).