NBody Viewer

This is a simple viewer for the NBody simulation. It is written in C++ and uses Raylib (OpenGL as backend) for rendering.

Build

Everything can be built with CMake. All dependencies are included via CMake's FetchContent. The only requirement is a C++17 compiler and OpenGL 3.3.

Linux

Then you can build the project with the following commands:

mkdir build
cd build
cmake ..
make

MacOS

Then you can build the project with the following commands:

mkdir build
cd build
cmake ..
make

Windows

Not officially supported, and tested

Run

To run the program, you can use the following command:

./nbody_viewer <path_to_data_file>

where <path_to_data_file> is the path to the data file generated by an NBody simulation. The default path is ./output.txt.

Data file format

The data file is a text file with the following format:

<position_1_x> <position_1_y> <position_1_z> 
<position_2_x> <position_2_y> <position_2_z> 
...
<position_n_x> <position_n_y> <position_n_z> 


<position_1_x> <position_1_y> <position_1_z> 
<position_2_x> <position_2_y> <position_2_z> 
...
<position_n_x> <position_n_y> <position_n_z> 


...

where <position_i_xyz> are the coordinates of the i-th particle at the current time step. The different time steps are separated by two empty lines.

Controls

The following controls are available:

• W/S/A/D/left/right/up/down: Move the camera
• ESC: Exit the program (not possible in Web mode)
• P: Debug mode (shows light source and FPS)
• Q: Toggle pause mode
• some other controls exist, but are only for testing purposes

To upload a file just drag and drop it into the window/browser.

Web

A web hosted version is available at https://gagalp.github.io/nbody_viewer/.

Screenshots