https://github.com/postmalloc/barycuda
A tiny CUDA library for fast barycentric operations.
https://github.com/postmalloc/barycuda
3d-graphics barycentric-coordinates cuda python simplex
Last synced: about 2 months ago
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A tiny CUDA library for fast barycentric operations.
- Host: GitHub
- URL: https://github.com/postmalloc/barycuda
- Owner: postmalloc
- License: mit
- Created: 2020-09-20T15:07:28.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-09-30T14:05:48.000Z (about 5 years ago)
- Last Synced: 2025-09-22T19:42:59.021Z (3 months ago)
- Topics: 3d-graphics, barycentric-coordinates, cuda, python, simplex
- Language: Cuda
- Homepage:
- Size: 246 KB
- Stars: 3
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# barycuda
Barycuda is a tiny CUDA accelerated library with no dependencies that
performs various barycentric operations. This is an attempt to speed-up
a 3D renderer that I'm working on.
Currently, the library exposes the following functions:
* `point_in_simplex` - takes an array of points, the vertices
of a 2D/3D simplex, and tells you if each point lies inside the
simplex.
* `bary_simplex` - takes an array of points, the vertices of
a 2D/3D simplex, and returns the barycentric coordinates for
each point.
## Usage
You can use Barycuda directly from C++ (see `src/testBary.cpp` for an example),
or if you prefer using Python, Barycuda has a Python wrapper available.
You can install it by doing
`pip install pybarycuda`
Installation using `pip` will come bundled with a prebuilt
`libbarycuda.so` for Linux x86-64. The linker paths are correctly set out of
the box, and you shouldn't have to change your `LD_LIBRARY_PATH` to be able to
use it.
I plan to support other architectures in the future, but if you want to
do it yourself, you can build the binaries (see below) and add `libbarycuda.so`
to `LD_LIBRARY_PATH` to make the Python wrapper work.
You will need a CUDA capable system for any of this to work.
## Build
```bash
# inside the project directory
mkdir build
cd build
cmake ../
make
```
## Contributing
Feel free to add more geometric operations related to
graphics rendering and raytracing.
## References
Shirley, P. (2009) Fundamentals of Computer Graphics
https://en.wikipedia.org/wiki/Barycentric_coordinate_system
https://math.stackexchange.com/questions/1226707/how-to-check-if-point-x-in-mathbbrn-is-in-a-n-simplex