3DGS-Snapdragon

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3DGS-Snapdragon

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Gaussian Splatting For Snapdragon SOC

// repository documentation

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# 3DGS-Snapdragon
3DGS-Snapdragon is a 3D Gaussian Splatting renderer. It's a modification of [3DGS.cpp](https://github.com/shg8/3DGS.cpp) changed to run inside an Android app to be compatible with the Snapdragon 8 Gen 2 chip.

## Pre-requisites

- Android Studio 4.2+ with [NDK](https://developer.android.com/ndk/) bundle.
- CMake
- A physical Android device (we have only tested this on the OnePlus12R mobile phone, which has a Snapdragon 8 Gen 2 SoC).

## Getting Started

1. `git clone` this project
1. Launch Android Studio.
1. Open the cloned directory.
1. Open *File/Project Structure...*
1. Click *File/Sync Project with Gradle Files*.
1. Then, add the .ply file you want to render in the `assets/` directory (`/app/src/main/assets/`). You can have multiple scenes and can switch between them in app when running in `debug` mode.
1. Click *Run/Run 'app'*.

### Build modes
Android Studio allows you to select between the different build variants we've configured.
The `debug` mode will display realtime pipeline stage times and allow you to swap between multiple scenes in-app.
The `profiling` mode collects these pipeline stage time metrics and store it to a file. To retrieve this collected data on your local machine run:

`adb shell cat /data/data/com.android.hellovk/files/data.txt > data.txt`

### Building on Windows
If you are building the app on windows, you likely have to manually compile the C program that CMake uses to compile the shaders. To do this run:
`cd app/src/main/cpp/cmake`
`bash compile_embedfile.sh`
This should generate an executable named `embedfile` in this `cmake` directory for your CMake to use.

## Issues
You may have to specify the location of your cmake download in `local.properties`.
Under `cmake.dir` specify the directory to your cmake download without the `/bin/cmake` part of the path.
So, if your cmake is installed at `/opt/homebrew/bin/cmake`, have `cmake.dir` as `/opt/homebrew/`

## Profiling
We use the [Snapdragon Profiler](https://www.qualcomm.com/developer/software/snapdragon-profiler) to profile the app.
When using it, some profiling features (System Trace Analysis) will crash if the ValidationLayers are enabled.
Thus, make sure to set `useValidationLayers` to false in `main()`.

3DGS-Snapdragon

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