https://github.com/angstrom-123/cpu-raytracing

Toy CPU path tracer
https://github.com/angstrom-123/cpu-raytracing

java maven path-tracing pathtracer pathtracing ray-tracing raytracer raytracing render renderer rendering rendering-engine

Last synced: about 2 months ago
JSON representation

Toy CPU path tracer

• Host: GitHub
• URL: https://github.com/angstrom-123/cpu-raytracing
• Owner: angstrom-123
• Created: 2024-11-13T13:33:05.000Z (6 months ago)
• Default Branch: master
• Last Pushed: 2024-12-05T15:54:59.000Z (5 months ago)
• Last Synced: 2025-03-28T13:13:56.189Z (about 2 months ago)
• Topics: java, maven, path-tracing, pathtracer, pathtracing, ray-tracing, raytracer, raytracing, render, renderer, rendering, rendering-engine
• Language: Java
• Homepage:
• Size: 9.44 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# CPU Raytracing

Toy CPU path tracer written entirely in Java.

## Features

- Physically based path tracing

- BVH optimisation using axis-aligned bounding boxes

- Support for Lambertian diffuse, metallic, glass, and emissive materials

- .obj file format model importing (model and normals only)

- Texture support

- Custom image texture support for spheres

## Running

Requires an installation of at least JDK-21.

By default, rendered images will attempt to save to a "renders" folder in the current or nearby directory. If this is not found, the default location is the cwd.

## Config

**Multithreading:**

Preliminary tests have shown that, on powerful computers, thread count should be equal to the number of high-power CPU cores (such as Intel's "performance cores"). Weaker systems and laptops could experience best performance with just one thread. 

**Tiling:**

Tile width width should be left at auto for fastest results as this optimizes the cache. Tile height can be reduced to maintain a higher average thread count throughout the render (as when one tile is finished, the thread can be reassigned).

![configMenu](https://github.com/user-attachments/assets/e64ebafa-d965-44f5-941a-50e41388c789)

## Demos

![random balls](https://github.com/user-attachments/assets/d9db3905-89b6-47df-94d3-75e463d5e949)

![glass knight](https://github.com/user-attachments/assets/13c44231-3fad-4e35-b30f-d2be8eb933f4)

![7559715668385661](https://github.com/user-attachments/assets/2d54ef4c-551b-4be9-a45a-6506f0882a25)

![emission](https://github.com/user-attachments/assets/5a56ea64-5ccd-4ab2-9b1a-faaec0b39fc5)

![cornell](https://github.com/user-attachments/assets/27ee759a-580d-4e6d-9cf5-11fc5f9dba79)

## References

"Ray tracing in one weekend" and "Ray tracing the next week" : https://raytracing.github.io/