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Modified by: Maythas Wangcharoenwong 20240722

N-body-simulator

This project aims to Simulate interactions of N-bodies in using Particle-Particle Method implemented with OpenGL and C++. The project provides option to use either Compute Shaders written in glsl or simple CPU implementation.

Features:

  • Velocity-Verlet and Euler Integrator
  • Spawning cluster of bodies into shape such as discs and globular clusters.
  • Although the project does not support taking arguments yet, setups can be done after launching the program.

Default Test 12

Build and Run

Simply use the scripts provided in ./QOL_Snippets to build and run the program.

Setting up a simulation

Setting up a simulation is simple, you can either use one of the pre-written default tests or setting up the simulation manually. The steps are as follow.

  1. run the run script

  2. Answer the prompt accordingly
    The input will be formatted in the following form. Each input value must be separated with the a space.

    Prompt here....
<variable_1> <variable_2>
:<your input value 1> <your input value 2>

    After you finished writing down the values without <>, simply press enter.
    In the case that the input is invalid, the prompt will be shown again.

  3. Adding particles

    1. If you choose the manual setup, simply follow step 2 since the input format stays the same.
    2. If you choose default tests, you can simply pick the valid test based on the following.
        Default test 0-4   : Test cases for CPU based setup (~1k particles)
    Default test 5-13  : Test cases for GPU based setup (~10k particles)
    Default test 14-22 : Test cases for GPU based setup (~20k-30k particles)
    Default test 23-33 : Test cases for GPU based setup (~40k+ particles)

  4. The simulation will then being in a paused state, simply press p to begin

Controls

Please refer to the "Window Controls" when running the program.

Controls Action
esc exit simulation
h display controls on the console.
p pause / continue the simulation.
i display setup log.
o toggle orbit / free-flying mode.
middle mouse drag + left shift pan the camera in the mouse drag direction.
middle mouse drag + left ctrl zoom in/out by dragging mouse forward and vice versa. (free-flying mode: move forward / backwards.)
middle mouse drag orbit the camera about the center in the mouse drag direction. (free-flying mode: rotate the center.)
middle mouse scroll same action as middle mouse drag.

Known Issues

Please don't minimize the simulation screen or it will blow up. 😂

Examples

Default Test 24

Default Test 25

Default Test 30