webgpu-raytracing-lab

This is my experiment on raytracing based on GPU.

It should obey the basic rules of raytracing, but is probably not the common practice, so be cautious when reading my codes.

Getting Started

1. Install pnpm
2. Run pnpm i
3. Run pnpm run dev

Overview

Configs

In the future, this part can be configured with JSON.

• config_max_bounce: the max bounce time (recursion depth) of rays

Kernels

• gen_ray: prepare initial primary rays; for each pixel, generate one random ray
• hit_test: hit test for existing rays, calculate color contribution and new rays
• filter: filter based on previous outputs to reduce noises
• filter: additional filter to reduce noises
  • to be added..
• blit: blit result to screen

Procedure

In one frame:

1. gen ray for each pixel
2. hit test for config_max_bounce times
3. filter using previous frame's output (running average)
4. blit to screen