Spherical Harmonics Exponentiation

Implementation of Real-time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation. Supports static scene of diffuse objects and area / environment light.

Build & Run

Linux dependencies for glfw: xorg-dev libgl1-mesa-dev

build

mkdir build && cd build
cmake ..
make

run interactive

./playground

output single image then quit

./playground -s

To test at different SH order, edit shorder.hpp

To change scene configuration / SHEXP algorithm, edit main.cpp

Note: To obtain best results, theta_max and theta_min should be tuned.

Preprocess tools

util/envmap project - parameterized light probe image onto SH bases.

util/makelut precompute shlog of visibility functions & corresponding shexp OL coefficients.

gamma/src/makesparse tabulate SH tripling tensor

github.com/111116/sphere-set-approximation generate sphere representation of object.