/photon_mapping

minimal but extensible header only implementation of photon mapping in C++

Primary LanguageC++MIT LicenseMIT

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 
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make

Structure

Name Description
include/camera.h ray generation from camera
include/core.h basic data types
include/image.h image
include/integrator.h implement photon mapping, path tracing(for reference)
include/light.h light
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

Externals

References