Global Illumination

Monte-Carlo path tracing for global illumination.

Features

• Acceleration structure: uniform grid
• Soft shadow and indirect lighting
• Surface reflection with perfect diffusion, specular and transmission effects
• OpenMP for multi-threading rendering

Usage

Compilation

We utilize cmake as the project building tool. In case your environment is not compatible with OpenMP, we offer a macro named NO_OMP to enable/disable OpenMP in the cmake generation step:

# Suppose your present working directory is Coding/build/

# Enable OpenMP
cmake -DNO_OMP=0 ..

# Disable OpenMP
cmake -DNO_OMP=1 ..

Execution

Once you manage to compile the project, you can run your ray tracing via typing the command below.

# Suppose your present working directory is Coding/build/

./rayTracing ../configs/config_all_diff.txt

The "config_all_diff.txt" is a configuration file for rendering diffusion-only scenes, where you can specify the number of available threads, samples per pixel, camera/light settings, output resolutions, etc. It is a plain-text file, where each option is stored in the format key value.

Demo

Third-party Libraries

• OpenMP
• Eigen (included in 3rdLibs/)
• progressbar (included in 3rdLibs/)
• stb_image_write (included in 3rdLibs/)

License

The GNU General Public License v3.0