Awesome

ti-raytrace

The project is powered by Taichi programming language

core tech overview

How to run

First config your anaconda workspace, and open the anaconda prompt
Second you need install dependency
```
pip install -r requirements.txt
```
Last you type
```
ti Main.py
```

Some image produced by this project

Bidirectional Path Tracing

<img src="image/veach-bdpt512.png"/>

sky light simulation

<img src="image/skydome.png"/>

spectral render

The red color is produced by spd below

<img src="spectrum/red.png" width="512"/>

produce a d65 cornell box

<img src="image/spectral-cornellbox.png"/>

using a luxocre example file
procude prism rainbow

<img src="image/rainbow-far.png"/>

Performance

100000 triangle mesh get 30fps with 2070super

Other algorithm:

radix sort
morton 3d code generation
compact & downweep

Reference

Nvidia 2012: Maximizing Parallelism in the Construction of BVHs,Octrees, and k-d Trees
Lauterbach 2009:Fast BVH Construction on GPUs
An Analytic Model for Full Spectral Sky-Dome Radiance. ACM TOG 31(4)
Hero wavelength spectral sampling.Eurographics Symposium on Rendering.2014
A Low-Dimensional Function Space for Efficient Spectral Upsampling.2019
Towards Bidirectional Path Tracing at Pixar.2016