photon_mapping
minimal but extensible header only implementation of photon mapping in C++.
Features
- Direct illumination with explicit light sampling
- Indirect illumination with final gathering
- Caustics photon map
- Reference path tracing integrator
- Load obj model
Requirements
Build
| CMake option | Description |
|---|---|
| BUILD_TESTS | build tests |
git submodule update --init
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make
Run
place obj model under build and run
./examples/main
Structure
| Name | Description |
|---|---|
include/camera.h |
ray generation from camera |
include/core.h |
basic data types |
include/image.h |
image |
include/integrator.h |
implementation of photon mapping, path tracing(for reference) |
include/light.h |
light |
include/material.h |
implementation of BRDF, BTDFs |
include/photon_map.h |
implementation of photon map with kdtree |
include/primitive.h |
primitive |
include/sampler.h |
random number generation, sampling utilities |
include/scene.h |
ray-scene intersection, model loading |
include/triangle.h |
point sampling on a triangle |
Gallery
Cornell box without final gathering
| Parameter | Value |
|---|---|
| number of photons | 1000000 |
| number of nearest neighbors | 100 |
| number of samples | 100 |
| final gathering | false |
Cornell box with final gathering
| Parameter | Value |
|---|---|
| number of photons | 1000000 |
| number of nearest neighbors | 100 |
| number of samples | 100 |
| final gathering | true |
Cornell box with mirror spheres
| Parameter | Value |
|---|---|
| number of photons | 1000000 |
| number of nearest neighbors | 100 |
| number of photons for caustics photon map | 1000000 |
| number of samples | 100 |
Cornell box with water
| Parameter | Value |
|---|---|
| number of photons | 100000 |
| number of nearest neighbors | 100 |
| number of photons for caustics photon map | 10000000 |
| number of samples | 256 |
This model is available under models/
Externals
References
- Jensen, Henrik Wann. Realistic image synthesis using photon mapping. AK Peters/crc Press, 2001.
- https://pbr-book.org/3ed-2018/Light_Transport_III_Bidirectional_Methods/Stochastic_Progressive_Photon_Mapping#
- http://www.cs.cmu.edu/afs/cs/academic/class/15462-s12/www/lec_slides/lec18.pdf
- memoRANDOM
- McGuire Computer Graphics Archive
- Rendering Resources | Benedikt Bitterli's Portfolio
- Jensen, Henrik Wann. "Global illumination using photon maps." Eurographics workshop on Rendering techniques. Springer, Vienna, 1996.
- Veach, Eric. Robust Monte Carlo methods for light transport simulation. Stanford University, 1998.
- Christensen, Per H. "Faster photon map global illumination." Journal of graphics tools 4.3 (1999): 1-10.
- Hachisuka, Toshiya, Jacopo Pantaleoni, and Henrik Wann Jensen. "A path space extension for robust light transport simulation." ACM Transactions on Graphics (TOG) 31.6 (2012): 1-10.