Monte Carlo code in c++/CUDA that utilises Optix to enable GPU computation of nearest intersection.

Currently the code is setup with an isotropic source at the origin. The photon packets then traverse a mesh of triangles and upon exit of the mesh are killed off. The medium has an albedo of unity and scattering coefficient of $10cm^{-1}$.

Optix scaffolding code is based upon Ingo Wald's Optix 7 course in particular example's 4 and 7. Actual MCRT code is contained in simulationPrograms.cu

Code also contains a basic renderer for viewing the meshes. Renderer shows the mesh with a solid colour and wireframe.

For a point source at the origin and uniform scattering with $\mu_s =10cm^{-1}$.

• Spot model: ~155 MPhotons/s
• Nefertiti Bust: ~ 80 Mphotons/s
• Standford Bunny: ~95 MPhotons/s
• Happy Buddha: ~70 MPhotons/s

• c++ compiler (17+)
• Nvidia hpc SDK
• Optix (version 7+)
• tiny_obj_loader (included)
• GDT (included)
• CMake (3.17+)

• Add absoprtion/photon weighting
• Add HG Phase function
• Add per mesh optical properties
• Test current code.
• Optimise
• Add reflections/refractions
• Add SDFs
• Add wavelength variable optical properties