https://github.com/emmanuelmess/collisionbasedgassimulator

Leveraging GPU with OpenCL to run a particle simulator
https://github.com/emmanuelmess/collisionbasedgassimulator

c gpu opencl

Last synced: about 4 hours ago
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Leveraging GPU with OpenCL to run a particle simulator

• Host: GitHub
• URL: https://github.com/emmanuelmess/collisionbasedgassimulator
• Owner: EmmanuelMess
• Created: 2024-10-11T22:07:11.000Z (about 1 month ago)
• Default Branch: master
• Last Pushed: 2024-10-25T02:59:13.000Z (21 days ago)
• Last Synced: 2024-10-25T15:56:02.163Z (21 days ago)
• Topics: c, gpu, opencl
• Language: C
• Homepage:
• Size: 56.5 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# First-collision timestep gas simulator with OpenCL

This simulator computes all possible intersections, then checks which of those possible intersections is soonest to

occur, and does some checks, the simulator then runs for time for enough time for the collision to occur. Once the 

intersection occurs, the whole process runs again.

The idea is that GPUs allow this to go very fast, by computing a lot of data in parallel (all segments and

intersections), this method of simulation is very precise as intersections are computed analytically, not 

in steps.

## Architecture

The general arch is in [architecture.md](architecture.md).

# Gallery



# Compilation and running

First compile with:

```bash

cd code

./generate_kernels.sh

cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_MAKE_PROGRAM=ninja -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -G Ninja -S ./ -B ./cmake-build-debug

cmake --build ./cmake-build-debug --target CollisionBasedGasSimulator -j 3

```

Then run with:

```bash

./cmake-build-debug/CollisionBasedGasSimulator

```

# Some refrences and thanks

* [Colliding balls](https://garethrees.org/2009/02/17/physics/): An explanation for the basic idea, but without much implementation info.

* [raylib](https://www.raylib.com/): All the drawing, and window management is done with raylib.

* [First-collision timestep gas simulator with CUDA](https://github.com/EmmanuelMess/FirstCollisionTimestepRarefiedGasSimulator): My old implementation of this same algorithm for CUDA

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