Keven Villeneuve*, Adrien Gruson*, Iliyan Georgiev, and Derek Nowrouzezahrai

Implementation of "Practical Product Sampling For Single Scattering In Media", Villeneuve et al. EGSR 2021 (Digital Library Only Track). For more information, please check Keven's website.

Dependencies needed to be installed on your system (tested only on Linux):

• Rust (1.53.0 stable): other versions of Rust should work without issues. To install Rust on your system, see https://rustup.rs/.
• OpenEXR (version 3): The code also works with version 2 by modifying Cargo.toml file (see comments inside this file directly).
• Embree (version 3).
• Python (version 3). Only required for run.py.

echo "Download code..."
git clone https://github.com/beltegeuse/rustlight.git
cd rustlight
git checkout point-normal
echo "Building code ..."
cargo build --release --example=cli --features="embree openexr" --
echo "Get scenes and references..." 
wget http://adrien-gruson.com/research/2021_PointNormal/point_normal_scenes.tar.xz
tar -xvf point_normal_scenes.tar.xz 
echo "Run results Fig. 3, 6, 7..."
mkdir results
python run.py
echo "Run results Fig. 5..."
sh run_plane_exp.sh

• src/integrators/explicit/point_normal.rs: different implementation of distance sampling (transmittance, equiangular, ours)
• src/integrators/explicit/point_normal_poly.rs: Taylor expansion of transmittance/phase order 4 and 6.
• examples/cli.rs: command-line interface (search point_normal).
• src/emitter.rs: ATS implementation (ported from PBRT-v4)

@article{Villeneuve:2021:VolumeProductSampling,
  author = {Keven Villeneuve and Adrien Gruson and Iliyan Georgiev and Derek Nowrouzezahrai},
  title = {Practical product sampling for single scattering in media},
  booktitle = {Proceedings of EGSR - Digital Library Only Track},
  year = {2021},
  month = jun,
  publisher = {The Eurographics Association}
}

Please look at README.md in the master branch.