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https://github.com/harskish/fluctus
An interactive OpenCL wavefront path tracer
https://github.com/harskish/fluctus
global-illumination gpu graphics opencl path-tracer path-tracing pathtracing raytracing rendering
Last synced: 2 months ago
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An interactive OpenCL wavefront path tracer
- Host: GitHub
- URL: https://github.com/harskish/fluctus
- Owner: harskish
- License: mit
- Created: 2017-06-26T13:07:22.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-06-04T19:21:27.000Z (8 months ago)
- Last Synced: 2024-06-04T21:29:03.814Z (8 months ago)
- Topics: global-illumination, gpu, graphics, opencl, path-tracer, path-tracing, pathtracing, raytracing, rendering
- Language: C++
- Homepage:
- Size: 90.7 MB
- Stars: 67
- Watchers: 5
- Forks: 16
- Open Issues: 1
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Metadata Files:
- Readme: README.md
- License: LICENSE.md
Awesome Lists containing this project
README
Fluctus
====================
OpenCL wavefront path tracer
--------------
## Features
- Physically based renderer
- PBRT and OBJ scenefiles
- Lambertian, glossy, ideal specular, and microfacet ([GGX][ggx]) BSDFs
- Multiple importance sampled environment maps (alias method)
- [Wavefront path tracing][wavefront] at interactive framerates
- Two implementations, one tuned for latency and the other for throughput
- Optimized structure of arrays data layout
- Efficient BVH with [spatial splits][sbvh]
- OptiX AI denoiser (on supported NVIDIA hardware)
- Requires OptiX 7, CUDA 10.1+, driver 435.80+
- Supports a wide variety of systems
- Cross-platform (Windows, MacOS, Linux)
- NVIDIA, AMD and Intel GPUs and CPUs
- CPU debugging with [Intel's OpenCL SDK][intel_ocl]
- Nanogui-based [user interface](gallery/user_interface.png)
- Uses only modern OpenGL (3.3+)
- Uses [CLT][clt] for convenience and robustness
## Usage
Rename settings_default.json to settings.json. Modify to set default OpenCL device, render scale, window dimensions etc.
### Controls
| Key | Action |
|-------------------------|---------------------------------------------------------------------------------------|
| **W / A / S / D** | Move camera (up/down with R/F) |
| **Mouse left** | Look around |
| **Mouse right** | Pick DoF focal depth (after setting aperture size) |
| **Scroll Up / Down** | Adjust movement speed |
| **Space** | Place area light |
| **F1** | Reset camera |
| **F2** | Save camera/area light state |
| **F3** | Load saved state |
| **F5** | Export image |
| **F6** | Toggle OptiX Denoiser (if built) |
| **H** | Toggle light sources (environment/area/both) |
| **I / K** | Adjust max bounces |
| **Z / X** | Adjust environment map emission |
| **L** | Open scene selector |
| **M** | Switch sampling mode |
| **U** | Toggle UI |
| **Page Up / Down** | Adjust area light emission |
| **1-5** | Select scene 1-5 (if set in settings.json) |
| **7** | Switch metween microkernel/wavefront |
| **8 / 9** | Change area light size |
| **, / .** | Change FOV |
## Build
See the [build instructions](./BUILDING.md).
Gallery
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## License
Source code and resources provided under the [MIT LICENSE](./LICENSE.md), unless otherwise specified.
[intel_ocl]: https://software.intel.com/intel-opencl
[wavefront]: http://research.nvidia.com/publication/megakernels-considered-harmful-wavefront-path-tracing-gpus
[sbvh]: https://www.nvidia.com/docs/IO/77714/sbvh.pdf
[ggx]: https://doi.org/10.2312/EGWR/EGSR07/195-206
[clt]: https://github.com/harskish/CLT